Author: "Noetzli, Jeannette" / Language: english - Searchworks@Jio Institute Digital Library Search Results

Your search keyword '"Noetzli, Jeannette"' showing total 31 results

Start Over Author "Noetzli, Jeannette" Language english

31 results on '"Noetzli, Jeannette"'

1. Response of alpine ground temperatures to a rising atmospheric 0 °C isotherm in the period 1955–2021

Author: Kenner, Robert, Noetzli, Jeannette, Bazargan, Mohsen, and Scherrer, Simon C.
Published: 2024
Full Text: View/download PDF

2. The changing thermal state of permafrost

Author: Smith, Sharon L., O’Neill, H. Brendan, Isaksen, Ketil, Noetzli, Jeannette, and Romanovsky, Vladimir E.
Published: 2022
Full Text: View/download PDF

3. Permafrost is warming at a global scale

Author: Biskaborn, Boris K., Smith, Sharon L., Noetzli, Jeannette, Matthes, Heidrun, Vieira, Gonçalo, Streletskiy, Dmitry A., Schoeneich, Philippe, Romanovsky, Vladimir E., Lewkowicz, Antoni G., Abramov, Andrey, Allard, Michel, Boike, Julia, Cable, William L., Christiansen, Hanne H., Delaloye, Reynald, Diekmann, Bernhard, Drozdov, Dmitry, Etzelmüller, Bernd, Grosse, Guido, Guglielmin, Mauro, Ingeman-Nielsen, Thomas, Isaksen, Ketil, Ishikawa, Mamoru, Johansson, Margareta, Johannsson, Halldor, Joo, Anseok, Kaverin, Dmitry, Kholodov, Alexander, Konstantinov, Pavel, Kröger, Tim, Lambiel, Christophe, Lanckman, Jean-Pierre, Luo, Dongliang, Malkova, Galina, Meiklejohn, Ian, Moskalenko, Natalia, Oliva, Marc, Phillips, Marcia, Ramos, Miguel, Sannel, A. Britta K., Sergeev, Dmitrii, Seybold, Cathy, Skryabin, Pavel, Vasiliev, Alexander, Wu, Qingbai, Yoshikawa, Kenji, Zheleznyak, Mikhail, and Lantuit, Hugues
Published: 2019
Full Text: View/download PDF

4. Global Climate:STATE OF THE CLIMATE IN 2021

Author: Ades, Melanie, Adler, Robert, Aldred, Freya, Allan, R. P., Anderson, John, Anneville, Orlane, Aono, Yasuyuki, Argüez, Anthony, Arosio, Carlo, Augustine, John A., Azorin-Molina, Cesar, Barichivich, Jonathan, Basu, Aman, Beck, Hylke E., Bellouin, Nicolas, Benedetti, Angela, Blagrave, Kevin, Blenkinsop, Stephen, Bock, Olivier, Bodin, Xavier, Bosilovich, Michael G., Boucher, Olivier, Bove, Gerald, Buechler, Dennis, Buehler, Stefan A., Carrea, Laura, Chang, Kai Lan, Christiansen, Hanne H., Christy, John R., Chung, Eui Seok, Ciasto, Laura M., Coldewey-Egbers, Melanie, Cooper, Owen R., Cornes, Richard C., Covey, Curt, Cropper, Thomas, Crotwell, Molly, Cusicanqui, Diego, Davis, Sean M., de Jeu, Richard A.M., Degenstein, Doug, Delaloye, Reynald, Donat, Markus G., Dorigo, Wouter A., Dunn, Robert J.H., Durre, Imke, Dutton, Geoff S., Duveiller, Gregory, Elkins, James W., Estilow, Thomas W., Fedaeff, Nava, Fereday, David, Fioletov, Vitali E., Flemming, Johannes, Foster, Michael J., Frith, Stacey M., Froidevaux, Lucien, Füllekrug, Martin, Garforth, Judith, Garg, Jay, Gentry, Matthew, Gobron, Nadine, Goodman, Steven, Gou, Qiqi, Granin, Nikolay, Guglielmin, Mauro, Hahn, Sebastian, Haimberger, Leopold, Hall, Brad D., Harris, Ian, Hemming, Debbie L., Hirschi, Martin, Ho, Shu Pen, Holzworth, Robert, Hrbáček, Filip, Hubert, Daan, Hulsman, Petra, Hurst, Dale F., Inness, Antje, Isaksen, Ketil, John, Viju O., Jones, Philip D., Junod, Robert, Kääb, Andreas, Kaiser, Johannes W., Kaufmann, Viktor, Kellerer-Pirklbauer, Andreas, Kent, Elizabeth C., Kidd, Richard, Kim, Hyungiun, Kipling, Zak, Koppa, Akash, L'Abée-Lund, Jan Henning, Lan, Xin, Lantz, Kathleen O., Lavers, David, Loeb, Norman G., Loyola, Diego, Madelon, Remi, Malmquist, Hilmar J., Marszelewski, Wlodzimierz, Mayer, Michael, McCabe, Matthew F., McVicar, Tim R., Mears, Carl A., Menzel, Annette, Merchant, Christopher J., Miller, John B., Miralles, Diego G., Montzka, Stephen A., Morice, Colin, Mösinger, Leander, Mühle, Jens, Nicolas, Julien P., Noetzli, Jeannette, Nõges, Tiina, Noll, Ben, O'Keefe, John, Osborn, Tim J., Park, Taejin, Pellet, Cecile, Pelto, Maury S., Perkins-Kirkpatrick, Sarah E., Phillips, Coda, Po-Chedley, Stephen, Polvani, Lorenzo, Preimesberger, Wolfgang, Price, Colin, Pulkkanen, Merja, Rains, Dominik G., Randel, William J., Rémy, Samuel, Ricciardulli, Lucrezia, Richardson, Andrew D., Robinson, David A., Rodell, Matthew, Rodríguez-Fernández, Nemesio J., Rosenlof, Karen H., Roth, Chris, Rozanov, Alexei, Rutishäuser, This, Sánchez-Lugo, Ahira, Sawaengphokhai, Parnchai, Schenzinger, Verena, Schlegel, Robert W., Schneider, Udo, Sharma, Sapna, Shi, Lei, Simmons, Adrian J., Siso, Carolina, Smith, Sharon L., Soden, Brian J., Sofieva, Viktoria, Sparks, Tim H., Stackhouse, Paul W., Stauffer, Ryan, Steinbrecht, Wolfgang, Steiner, Andrea K., Stewart, Kenton, Stradiotti, Pietro, Streletskiy, Dimitri A., Telg, Hagen, Thackeray, Stephen J., Thibert, Emmanuel, Todt, Michael, Tokuda, Daisuke, Tourpali, Kleareti, Tye, Mari R., Van Der, A. Ronald, van der Schalie, Robin, van der Schrier, Gerard, van der Vliet, Mendy, van der Werf, Guido R., van Vliet, Arnold, Vernier, Jean Paul, Vimont, Isaac J., Virts, Katrina, Vivero, Sebastiàn, Vömel, Holger, Vose, Russell S., Wang, Ray H.J., Weber, Markus, Wiese, David, Wild, Jeanette D., Willett, Kate M., Williams, Earle, Wong, Takmeng, Woolway, R. I., Yin, Xungang, Yuan, Ye, Zhao, Lin, Zhou, Xinjia, Ziemke, Jerry R., Ziese, Markus, Zotta, Ruxandra M., Allen, Jessicca, Camper, Amy, Hammer, Gregory, Love-Brotak, S. Elizabeth, Misch, Deborah J., Ohlmann, Laura, Riddle, Deborah B., Veasey, Sara W., Earth and Climate, Earth Sciences, and Amsterdam Sustainability Institute
Published: 2022
Full Text: View/download PDF

5. Measurement Recommendations and Guidelines for the Global Terrestrial Network for Permafrost (GTN-P)

Author: Streletskiy, Dimtry, Noetzli, Jeannette, Smith, Sharon L., Vieira, Gonçalo, Schoeneich, Philippe, Hrbacek, Filip, and Irrgang, Anna M.
Subjects: Permfrost Temperature, Active Layer, Rock Glacier Velocity, Permafrost Measurements
Abstract: This document provides the definitions used by the GTN-P Network, as well asa short description commonly used measurement techniques and sampling recommendations and guidelines. This is a provisional document. It will be substituted by the Permafrost Best Practices that will be published as part of the Update of the World Meteorological Organization Guide No. 8.
Published: 2022
Full Text: View/download PDF

6. In situ observations of the Swiss periglacial environment using GNSS instruments

Author: Cicoira, Alessandro, Weber, Samuel, Biri, Andreas, Buchli, Ben, Delaloye, Reynald, Da Forno, Reto, Gärtner-Roer, Isabelle, Gruber, Stephan, Gsell, Tonio, Hasler, Andreas, Lim, Roman, Limpach, Philippe, Mayoraz, Raphael, Meyer, Matthias, Noetzli, Jeannette, Phillips, Marcia, Pointner, Eric, Raetzo, Hugo, Scapozza, Cristian, Strozzi, Tazio, Vieli, Andreas, and Vonder Mühll, Daniel
Abstract: Monitoring of the periglacial environment is relevant for many disciplines including glaciology, natural hazard management, geomorphology, and geodesy. Since October 2022, Rock Glacier Velocity (RGV) is a new Essential Climate Variable (ECV) product within the Global Climate Observing System (GCOS). However, geodetic surveys at high elevation remain very challenging due to environmental and logistical reasons. During the past decades, the introduction of low-cost global navigation satellite system (GNSS) technologies has allowed us to increase the accuracy and frequency of the observations. Today, permanent GNSS instruments enable continuous surface displacement observations at millimetre accuracy with a sub-daily resolution. In this paper, we describe decennial time series of GNSS observables as well as accompanying meteorological data. The observations comprise 54 positions located on different periglacial landforms (rock glaciers, landslides, and steep rock walls) at altitudes ranging from 2304 to 4003 and spread across the Swiss Alps. The primary data products consist of raw GNSS observables in RINEX format, inclinometers, and weather station data. Additionally, cleaned and aggregated time series of the primary data products are provided, including daily GNSS positions derived through two independent processing tool chains. The observations documented here extend beyond the dataset presented in the paper and are currently continued with the intention of long-term monitoring. An annual update of the dataset, available at https://doi.org/10.1594/PANGAEA.948334 (Beutel et al., 2022), is planned. With its future continuation, the dataset holds potential for advancing fundamental process understanding and for the development of applied methods in support of e.g. natural hazard management., Earth System Science Data, 14 (11), ISSN:1866-3516, ISSN:1866-3508
Published: 2022
Full Text: View/download PDF

7. Best Practice for Measuring Permafrost Temperature in Boreholes Based on the Experience in the Swiss Alps

Author: Noetzli, Jeannette, Arenson, Lukas U., Bast, Alexander, Beutel, Jan, Delaloye, Reynald, Farinotti, Daniel, Gruber, Stephan, Gubler, Hansueli, Haeberli, Wilfried, Hasler, Andreas, Hauck, Christian, Hiller, Martin, Hoelzle, Martin, Lambiel, Christophe, Pellet, Cécile, Springman, Sarah M., Vonder Muehll, Daniel, and Phillips, Marcia
Subjects: Best practices, Long-term monitoring, Permafrost, Borehole temperatures, General Earth and Planetary Sciences, High mountain areas, permafrost, borehole temperatures, high mountain areas, long-term monitoring, best practices
Abstract: Temperature measurements in boreholes are the most common method allowing the quantitative and direct observation of permafrost evolution in the context of climate change. Existing boreholes and monitoring networks often emerged in a scientific context targeting different objectives and with different setups. A standardized, well-planned and robust instrumentation of boreholes for long-term operation is crucial to deliver comparable, high-quality data for scientific analyses and assessments. However, only a limited number of guidelines are available, particularly for mountain regions. In this paper, we discuss challenges and devise best practice recommendations for permafrost temperature measurements at single sites as well as in a network, based on two decades of experience gained in the framework of the Swiss Permafrost Monitoring Network PERMOS. These recommendations apply to permafrost observations in mountain regions, although many aspects also apply to polar lowlands. The main recommendations are (1) to thoroughly consider criteria for site selection based on the objective of the measurements as well as on preliminary studies and available data, (2) to define the sampling strategy during planification, (3) to engage experienced drilling teams who can cope with inhomogeneous and potentially unstable subsurface material, (4) to select standardized and robust instrumentation with high accuracy temperature sensors and excellent long-term stability when calibrated at 0°C, ideally with double sensors at key depths for validation and substitution of questionable data, (5) to apply standardized maintenance procedures allowing maximum comparability and minimum data processing, (6) to implement regular data control procedures, and (7) to ensure remote data access allowing for rapid trouble shooting and timely reporting. Data gaps can be avoided by timely planning of replacement boreholes. Recommendations for standardized procedures regarding data quality documentation, processing and final publication will follow later., Frontiers in Earth Science, 9, ISSN:2296-6463
Published: 2021

8. Global Climate [in 'State of the Climate in 2019']

Author: Dunn, Robert J. H., Stanitski, Diane M., Gobron, Nadine, Willett, Kate M., Ades, M., Adler, R., Allan, R. P., Anderson, J., Argüez, Anthony, Arosio, C., Augustine, J. A., Azorin-Molina, C., Barichivich, J., Barnes, J., Beck, H. E., Becker, Andreas, Bellouin, Nicolas, Benedetti, Angela, Berry, David I., Blenkinsop, Stephen, Bock, Olivier, Bosilovich, Michael G., Boucher, Olivier, Buehler, S. A., Carrea, Laura, Christiansen, Hanne H., Chouza, F., Christy, John R., Chung, E.-S., Coldewey-Egbers, Melanie, Compo, Gil P., Cooper, Owen R., Covey, Curt, Crotwell, A., Davis, Sean M., Eyto, Elvira De, de Jeu, Richard A. M., Degasperi, Curtis L., Degenstein, Doug, Di Girolamo, Larry, Dokulil, Martin T., Donat, Markus G., Dorigo, Wouter A., Durre, Imke, Dutton, Geoff S., Duveiller, G., Elkins, James W., Fioletov, Vitali E., Flemming, Johannes, Foster, Michael J., Frey, Richard A., Frith, Stacey M., Froidevaux, Lucien, Garforth, J., Gupta, S. K., Haimberger, Leopold, Hall, Brad D., Harris, Ian, Heidinger, Andrew K., Hemming, D. L., Ho, Shu-Peng (ben), Hubert, Daan, Hurst, Dale F., Hüser, I., Inness, Antje, Isaksen, K., John, Viju, Jones, Philip D., Kaiser, J. W., Kelly, S., Khaykin, Sergey, Kidd, R., Kim, Hyungiun, Kipling, Z., Kraemer, B. M., Kratz, D. P., Fuente, R. S. La, Lan, Xin, Lantz, Kathleen O., Leblanc, Thierry, Li, Bailing, Loeb, Norman G., Long, Craig S., Loyola, Diego, Marszelewski, Wlodzimierz, Martens, B., May, Linda, Mayer, Michael, Mccabe, M. F., Mcvicar, Tim R., Mears, Carl A., Menzel, W. Paul, Merchant, Christopher J., Miller, Ben R., Miralles, Diego G., Montzka, Stephen A., Morice, Colin, Mühle, Jens, Myneni, R., Nicolas, Julien P., Noetzli, Jeannette, Osborn, Tim J., Park, T., Pasik, A., Paterson, Andrew M., Pelto, Mauri S., Perkins-Kirkpatrick, S., Petron, G., Phillips, C., Pinty, Bernard, Po-Chedley, S., Polvani, L., Preimesberger, W., Pulkkanen, M., Randel, W. J., Remy, Samuel, Ricciardulli, L., Richardson, A. D., Rieger, L., Robinson, David A., Rodell, Matthew, Rosenlof, Karen H., Roth, Chris, Rozanov, A., Rusak, James A., Rusanovskaya, O., Rutishäuser, T., Sánchez-Lugo, Ahira, Sawaengphokhai, P., Scanlon, T., Schenzinger, Verena, Schladow, S. Geoffey, Schlegel, R. W, Schmid, Martin, Selkirk, H. B., Sharma, S., Shi, Lei, Shimaraeva, S. V., Silow, E. A., Simmons, Adrian J., Smith, C. A., Smith, Sharon L, Soden, B. J., Sofieva, Viktoria, Sparks, T. H., Jr., Paul W. Stackhouse, Steinbrecht, Wolfgang, Streletskiy, Dimitri A., Taha, G., Telg, Hagen, Thackeray, S. J., Timofeyev, M. A., Tourpali, Kleareti, Tye, Mari R., A, Ronald J. van Der, van Der Schalie, Robin, van Der Schrier, Gerard, van Der Werf, Guido R., Verburg, Piet, Vernier, Jean-Paul, Vömel, Holger, Vose, Russell S., Wang, Ray, Watanabe, Shohei G., Weber, Mark, Weyhenmeyer, Gesa A., Wiese, David, Wilber, Anne C., Wild, Jeanette D., Wong, Takmeng, Woolway, R. Iestyn, Yin, Xungang, Zhao, Lin, Zhao, Guanguo, Zhou, Xinjia, Ziemke, Jerry R., Ziese, Markus, Met Office Hadley Centre for Climate Change (MOHC), United Kingdom Met Office [Exeter], NOAA Earth System Research Laboratory (ESRL), National Oceanic and Atmospheric Administration (NOAA), European Commission - Joint Research Centre [Ispra] (JRC), European Centre for Medium-Range Weather Forecasts (ECMWF), University of Maryland [College Park], University of Maryland System, University of Reading (UOR), Department of Atmospheric and Planetary Sciences [Hampton] (APS), Hampton University, NOAA National Environmental Satellite, Data, and Information Service (NESDIS), Universität Bremen, Centro de Investigaciones sobre Desertificacion (CIDE), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Pontificia Universidad Católica de Valparaíso (PUCV), Department of Civil and Environmental Engineering [Princeton], Princeton University, Deutscher Wetterdienst [Offenbach] (DWD), Department of Meteorology [Reading], National Oceanography Centre [Southampton] (NOC), University of Southampton, Newcastle University [Newcastle], Institut de Physique du Globe de Paris (IPGP), Institut national des sciences de l'Univers (INSU - CNRS)-IPG PARIS-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), École nationale des sciences géographiques (ENSG), Institut National de l'Information Géographique et Forestière [IGN] (IGN)-Université Gustave Eiffel, Global Modeling and Assimilation Office (GMAO), NASA Goddard Space Flight Center (GSFC), Sorbonne Université (SU), Universität Hamburg (UHH), The University Centre in Svalbard (UNIS), Jet Propulsion Laboratory (JPL), California Institute of Technology (CALTECH)-NASA, University of Alabama in Huntsville (UAH), IBS Center for Climate Physics, Pusan National University, Deutsches Zentrum für Luft- und Raumfahrt [Oberpfaffenhofen-Wessling] (DLR), Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado [Boulder]-National Oceanic and Atmospheric Administration (NOAA), Lawrence Livermore National Laboratory (LLNL), Marine Institute [Ireland], VanderSat B.V., King County Water and Land Resources Division, Institute of Space and Atmospheric Studies [Saskatoon] (ISAS), Department of Physics and Engineering Physics [Saskatoon], University of Saskatchewan [Saskatoon] (U of S)-University of Saskatchewan [Saskatoon] (U of S), University of Illinois at Urbana-Champaign [Urbana], University of Illinois System, University of Innsbruck, Barcelona Supercomputing Center - Centro Nacional de Supercomputacion (BSC - CNS), Department of Geodesy and Geoinformation [Wien], Vienna University of Technology (TU Wien), Environment and Climate Change Canada, Cooperative Institute for Meteorological Satellite Studies (CIMSS), National Oceanic and Atmospheric Administration (NOAA)-University of Wisconsin-Madison-NASA, Science Systems and Applications, Inc. [Lanham] (SSAI), Woodland Trust, Science Systems and Applications, Inc. [Hampton] (SSAI), Department of Meteorology and Geophysics [Vienna], Universität Wien, School of Environmental Sciences [Norwich], University of East Anglia [Norwich] (UEA), Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique (BIRA-IASB), ESRL Global Monitoring Laboratory [Boulder] (GML), National Oceanic and Atmospheric Administration (NOAA)-National Oceanic and Atmospheric Administration (NOAA), Norwegian Meteorological Institute [Oslo] (MET), European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT), Dundalk Institute of Technology (DkIT), TROPO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS), Earth Observation Data Centre GmbH (EODC), Institute of Industrial Science (IIS), The University of Tokyo (UTokyo), Leibniz-Institut für Gewässerökologie und Binnenfischerei (IGB), Leibniz Association, NASA Langley Research Center [Hampton] (LaRC), GSFC Hydrological Sciences Laboratory, Earth Science System Interdisciplinary Center [College Park] (ESSIC), College of Computer, Mathematical, and Natural Sciences [College Park], University of Maryland System-University of Maryland System-University of Maryland [College Park], University of Maryland System-University of Maryland System, NOAA National Weather Service (NWS), DLR Institut für Methodik der Fernerkundung / DLR Remote Sensing Technology Institute (IMF), Department of Hydrology and Water Resources Management, Nicolaus Copernicus University [Toruń], Hydro-Climate Extremes Laboratory (H-CEL), Universiteit Gent = Ghent University [Belgium] (UGENT), Centre for Ecology and Hydrology [Edinburgh] (CEH), Natural Environment Research Council (NERC), King Abdullah University of Science and Technology (KAUST), CSIRO Land and Water, Commonwealth Scientific and Industrial Research Organisation [Canberra] (CSIRO), Remote Sensing Systems [Santa Rosa] (RSS), Space Science and Engineering Center [Madison] (SSEC), University of Wisconsin-Madison, NERC National Centre for Earth Observation (NCEO), Scripps Institution of Oceanography (SIO), University of California [San Diego] (UC San Diego), University of California-University of California, Department of Environmental, Earth and Ocean Sciences [Boston] (EEOS), University of Massachusetts [Boston] (UMass Boston), University of Massachusetts System (UMASS)-University of Massachusetts System (UMASS), Swiss Federal Institute for Forest, Snow and Landscape Research WSL, NASA Ames Research Center (ARC), Dorset Environmental Science Centre, Ontario Ministry of the Environment and Climate Change, Nichols College Dudley, University of New South Wales [Sydney] (UNSW), Department of Atmospheric and Oceanic Sciences [Madison], Columbia University [New York], Finnish Meteorological Institute (FMI), National Center for Atmospheric Research [Boulder] (NCAR), Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), School of Informatics, Computing, and Cyber Systems (SICCS), Northern Arizona University [Flagstaff], Center for Ecosystem Science and Society (ECOSS), University of Saskatchewan [Saskatoon] (U of S), Department of Geography [Piscataway], Rutgers, The State University of New Jersey [New Brunswick] (RU), Rutgers University System (Rutgers)-Rutgers University System (Rutgers), Irkutsk State University (ISU), Institute of Geography [Bern], University of Bern, UC Davis Tahoe Environmental Research Center, University of California [Davis] (UC Davis), Department of Physical Oceanography [Woods Hole], Woods Hole Oceanographic Institution (WHOI), Swiss Federal Insitute of Aquatic Science and Technology [Dübendorf] (EAWAG), York University [Toronto], Geological Survey of Canada [Ottawa] (GSC Central & Northern Canada), Geological Survey of Canada - Office (GSC), Natural Resources Canada (NRCan)-Natural Resources Canada (NRCan), Rosenstiel School of Marine and Atmospheric Science (RSMAS), University of Miami [Coral Gables], Poznan University of Life Sciences (Uniwersytet Przyrodniczy w Poznaniu) (PULS), Meteorologisches Observatorium Hohenpeißenberg (MOHp), Department of Geography [Washington], The George Washington University (GW), Goddard Earth Sciences and Technology and Research (GESTAR), Universities Space Research Association (USRA)-NASA, Centre for Ecology and Hydrology [Lancaster] (CEH), Laboratory of Atmospheric Physics [Thessaloniki], Aristotle University of Thessaloniki, Capacity Center for Climate and Weather Extremes (C3WE), Royal Netherlands Meteorological Institute (KNMI), Vrije Universiteit Amsterdam [Amsterdam] (VU), National Institute of Water and Atmosphere [Hamilton] (NIWA), Earth Observing Laboratory [Boulder] (EOL), National Center for Atmospheric Research [Boulder] (NCAR)-University Corporation for Atmospheric Research (UCAR), School of Earth and Atmospheric Sciences [Atlanta], Georgia Institute of Technology [Atlanta], Nanjing University of Information Science and Technology (NUIST), Institut de Physique du Globe de Paris (IPGP (UMR_7154)), Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), NASA-California Institute of Technology (CALTECH), Leopold Franzens Universität Innsbruck - University of Innsbruck, University of Wisconsin-Madison-NASA-National Oceanic and Atmospheric Administration (NOAA), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Universiteit Gent = Ghent University (UGENT), Scripps Institution of Oceanography (SIO - UC San Diego), University of California (UC)-University of California (UC), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), and NASA-Universities Space Research Association (USRA)
Subjects: [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology
Abstract: International audience; Global Climate is one chapter from the State of the Climate in 2019 annual report and is avail- able from https://doi.org/10.1175/BAMS-D-20-0104.1 Compiled by NOAA’s National Centers for Environmental Information, State of the Climate in 2019 is based on contributions from scien- tists from around the world. It provides a detailed update on global climate indicators, notable weather events, and other data collected by environmental monitoring stations and instru- ments located on land, water, ice, and in space.The full report is available from https://doi.org/10.1175/2020BAMSStateoftheClimate.1.
Published: 2020
Full Text: View/download PDF

9. GIS-based modelling of rock-ice avalanches from Alpine permafrost areas

Author: Noetzli, Jeannette, Huggel, Christian, Hoelzle, Martin, and Haeberli, Wilfried
Published: 2006
Full Text: View/download PDF

10. Long-term energy balance measurements at three different mountain permafrost sites in the Swiss Alps.

Author: Hoelzle, Martin, Hauck, Christian, Mathys, Tamara, Noetzli, Jeannette, Pellet, Cécile, and Scherler, Martin
Subjects: PERMAFROST, ATMOSPHERIC temperature, SNOWMELT, HEAT flux, SNOW cover, BOREHOLES
Abstract: The surface energy balance is a key factor influencing the ground thermal regime. With ongoing climate change, it is crucial to understand the interactions of the individual heat fluxes at the surface and within the subsurface layers, as well as their relative impacts on the permafrost thermal regime. A unique set of high-altitude meteorological measurements was analysed to determine the energy balance at three mountain permafrost sites in the Swiss Alps (Murtèl–Corvatsch, Schilthorn and Stockhorn), where data have been collected since the late 1990s in the framework of the Swiss Permafrost Monitoring Network (PERMOS). All stations are equipped with sensors for four-component radiation, air temperature, humidity, and wind speed and direction, as well as ground temperatures and snow height. The three sites differ considerably in their surface and ground material composition, as well as their ground ice contents. The energy fluxes were calculated based on two decades of field measurements. While the determination of the radiation budget and the ground heat flux is comparatively straightforward (by the four-component radiation sensor and thermistor measurements within the boreholes), larger uncertainties exist for the determination of turbulent sensible and latent heat fluxes. Our results show that mean air temperature at Murtèl–Corvatsch (1997–2018, 2600 m a.s.l.) is -1.66 ∘ C and has increased by about 0.8 ∘ C during the measurement period. At the Schilthorn site (1999–2018, 2900 m a.s.l.) a mean air temperature of -2.60 ∘ C with a mean increase of 1.0 ∘ C was measured. The Stockhorn site (2003–2018, 3400 m a.s.l.) recorded lower air temperatures with a mean of -6.18 ∘ C and an increase of 0.5 ∘ C. Measured net radiation, as the most important energy input at the surface, shows substantial differences with mean values of 30.59 W m -2 for Murtèl–Corvatsch, 32.40 W m -2 for Schilthorn and 6.91 W m -2 for Stockhorn. The calculated turbulent fluxes show values of around 7 to 13 W m -2 using the Bowen ratio method and 3 to 15 W m -2 using the bulk method at all sites. Large differences are observed regarding the energy used for the melting of the snow cover: at Schilthorn a value of 8.46 W m -2 , at Murtèl–Corvatsch 4.17 W m -2 and at Stockhorn 2.26 W m -2 are calculated, reflecting the differences in snow height at the three sites. In general, we found considerable differences in the energy fluxes at the different sites. These differences help to explain and interpret the causes of a warming atmosphere. We recognise a strong relation between the net radiation and the ground heat flux. Our results further demonstrate the importance of long-term monitoring to better understand the impacts of changes in the surface energy balance components on the permafrost thermal regime. The dataset presented can be used to improve permafrost modelling studies aiming at, for example, advancing knowledge about permafrost thaw processes. The data presented and described here are available for download at the following site: 10.13093/permos-meteo-2021-01. [ABSTRACT FROM AUTHOR]
Published: 2022
Full Text: View/download PDF

11. State of the Climate in 2018

Author: Ades, M., Adler, R., Aldeco, Laura S., Alejandra, G., Alfaro, Eric J., Aliaga-Nestares, Vannia, Allan, Richard P., Allan, Rob, Alves, Lincoln M., Amador, Jorge A., Andersen, J. K., Anderson, John, Arndt, Derek S., Arosio, C., Arrigo, Kevin, Azorin-Molina, César, Bardin, M. Yu, Barichivich, Jonathan, Barreira, Sandra, Baxter, Stephen, Beck, H. E., Becker, Andreas, Bell, Gerald D., Bellouin, Nicolas, Belmont, M., Benedetti, Angela, Benedict, Imme, Bernhard, G. H., Berrisford, Paul, Berry, David I., Bettio, Lynette, Bhatt, U. S., Biskaborn, B. K., Bissolli, Peter, Bjella, Kevin L., Bjerke, J. K., Blake, Eric S., Blenkinsop, Stephen, Blunden, Jessica, Bock, Olivier, Bosilovich, Michael G., Boucher, Olivier, Box, J. E., Boyer, Tim, Braathen, Geir, Bringas, Francis G., Bromwich, David H., Brown, Alrick, Brown, R., Brown, Timothy J., Buehler, S. A., Cáceres, Luis, Calderón, Blanca, Camargo, Suzana J., Campbell, Jayaka D., Campos Diaz, Diego A., Cappelen, J., Carrea, Laura, Carrier, Seth B., Carter, Brendan R., Castro, Anabel Y., Cetinic, Ivona, Chambers, Don P., Chen, Lin, Cheng, Lijing, Cheng, Vincent Y.S., Christiansen, Hanne H., Christy, John R., Chung, E. S., Claus, Federico, Clem, Kyle R., Coelho, Caio A.S., Coldewey-Egbers, Melanie, Colwell, Steve, Cooper, Owen R., Cosca, Cathy, Covey, Curt, Coy, Lawrence, Dávila, Cristina P., Davis, Sean M., de Eyto, Elvira, de Jeu, Richard A.M., De Laat, Jos, Decharme, B., Degasperi, Curtis L., Degenstein, Doug, Demircan, Mesut, Derksen, C., Dhurmea, K. R., Di Girolamo, Larry, Diamond, Howard J., Diaz, Eliecer, Diniz, Fransisco A., Dlugokencky, Ed J., Dohan, Kathleen, Dokulil, Martin T., Dolman, A. Johannes, Domingues, Catia M., Domingues, Ricardo, Donat, Markus G., Dorigo, Wouter A., Drozdov, D. S., Druckenmiller, Matthew L., Dunn, Robert J.H., Durre, Imke, Dutton, Geoff S., Elkharrim, M., Elkins, James W., Epstein, H. E., Espinoza, Jhan C., Famiglietti, James S., Farrell, Sinead L., Fausto, R. S., Feely, Richard A., Feng, Z., Fenimore, Chris, Fettweis, X., Fioletov, Vitali E., Flemming, Johannes, Fogt, Ryan L., Forbes, B. C., Foster, Michael J., Francis, S. D., Franz, Bryan A., Frey, Richard A., Frith, Stacey M., Froidevaux, Lucien, Ganter, Catherine, Garforth, J., Gerland, Sebastian, Gilson, John, Gleason, Karin, Gobron, Nadine, Goetz, S., Goldenberg, Stanley B., Goni, Gustavo, Gray, Alison, Grooß, Jens Uwe, Gruber, Alexander, Gu, Guojun, Guard, Charles Chip P., Gupta, S. K., Gutiérrez, Dimitri, Haas, Christian, Hagos, S., Hahn, Sebastian, Haimberger, Leo, Hall, Brad D., Halpert, Michael S., Hamlington, Benjamin D., Hanna, E., Hanssen-Bauer, I., Harris, Ian, Hazeleger, Wilco, He, Q., Heidinger, Andrew K., Heim, Richard R., Hemming, D. L., Hendricks, Stefan, Hernández, Rafael, Hersbach, H. E., Hidalgo, Hugo G., Ho, Shu Peng Ben, Holmes, R. M., Hu, Chuanmin, Huang, Boyin, Hubbard, Katherine, Hubert, Daan, Hurst, Dale F., Ialongo, Iolanda, Ijampy, J. A., Inness, Antje, Isaac, Victor, Isaksen, K., Ishii, Masayoshi, Jeffries, Martin O., Jevrejeva, Svetlana, Jia, G., Jiménez, C., Jin, Xiangze, John, Viju, Johnsen, Bjørn, Johnson, Gregory C., Johnson, Kenneth S., Johnson, Bryan, Jones, Philip D., Jumaux, Guillaume, Kabidi, Khadija, Kaiser, J. W., Karaköylü, Erdem M., Karlsen, S. R., Karnauskas, Mandy, Kato, Seiji, Kazemi, A. Fazl, Kelble, Christopher, Keller, Linda M., Kennedy, John, Kholodov, A. L., Khoshkam, Mahbobeh, Kidd, R., Killick, Rachel, Kim, Hyungjun, Kim, S. J., King, A. D., King, Brian A., Kipling, Z., Klotzbach, Philip J., Knaff, John A., Korhonen, Johanna, Korshunova, Natalia N., Kramarova, Natalya A., Kratz, D. P., Kruger, Andries, Kruk, Michael C., Krumpen, Thomas, Labbé, L., Ladd, C., Lakatos, Mónika, Lakkala, Kaisa, Lander, Mark A., Landschützer, Peter, Landsea, Chris W., Lareau, Neil P., Lavado-Casimiro, Waldo, Lazzara, Matthew A., Lee, T. C., Leuliette, Eric, L’heureux, Michelle, Li, Bailing, Li, Tim, Lieser, Jan L., Lim, J. Y., Lin, I. I., Liu, Hongxing, Locarnini, Ricardo, Loeb, Norman G., Long, Craig S., López, Luis A., Lorrey, Andrew M., Loyola, Diego, Lumpkin, Rick, Luo, Jing Jia, Luojus, K., Lyman, John M., Malkova, G. V., Manney, Gloria L., Marchenko, S. S., Marengo, José A., Marin, Dora, Marquardt Collow, Allison B., Marra, John J., Marszelewski, Wlodzimierz, Martens, B., Martínez-Güingla, Rodney, Massom, Robert A., May, Linda, Mayer, Michael, Mazloff, Matthew, McBride, Charlotte, McCabe, M., McClelland, J. W., McEvoy, Daniel J., McGree, Simon, McVicar, Tim R., Mears, Carl A., Meier, Walt, Meijers, Andrew, Mekonnen, Ademe, Mengistu Tsidu, G., Menzel, W. Paul, Merchant, Christopher J., Meredith, Michael P., Merrifield, Mark A., Miller, Ben, Miralles, Diego G., Misevicius, Noelia, Mitchum, Gary T., Mochizuki, Y., Monselesan, Didier, Montzka, Stephen A., Mora, Natali, Morice, Colin, Mosquera-Vásquez, Kobi, Mostafa, Awatif E., Mote, T., Mudryk, L., Mühle, Jens, Mullan, A. Brett, Müller, Rolf, Myneni, R., Nash, Eric R., Nauslar, Nicholas J., Nerem, R. Steven, Newman, Paul A., Nicolas, Julien P., Nieto, Juan José, Noetzli, Jeannette, Osborn, Tim J., Osborne, Emily, Overland, J., Oyunjargal, Lamjav, Park, T., Pasch, Richard J., Pascual Ramírez, Reynaldo, Pastor Saavedra, Maria Asuncion, Paterson, Andrew M., Pearce, Petra R., Pelto, Mauri S., Perovich, Don, Petropavlovskikh, Irina, Pezza, Alexandre B., Phillips, C., Phillips, David, Phoenix, G., Pinty, Bernard, Pitts, Michael, Po-Chedley, S., Polashenski, Chris, Preimesberger, W., Purkey, Sarah G., Quispe, Nelson, Rajeevan, Madhavan, Rakotoarimalala, C. L., Ramos, Andrea M., Ramos, Isabel, Randel, W., Raynolds, M. K., Reagan, James, Reid, Phillip, Reimer, Christoph, Rémy, Samuel, Revadekar, Jayashree V., Richardson, A. D., Richter-Menge, Jacqueline, Ricker, Robert, Ripaldi, A., Robinson, David A., Rodell, Matthew, Rodriguez Camino, Ernesto, Romanovsky, Vladimir E., Ronchail, Josyane, Rosenlof, Karen H., Rösner, Benajamin, Roth, Chris, Rozanov, A., Rusak, James A., Rustemeier, Elke, Rutishäuser, T., Sallée, Jean Baptiste, Sánchez-Lugo, Ahira, Santee, Michelle L., Sawaengphokhai, P., Sayouri, Amal, Scambos, Ted A., Scanlon, T., Scardilli, Alvaro S., Schenzinger, Verena, Schladow, S. Geoffey, Schmid, Claudia, Schmid, Martin, Schoeneich, P., Schreck, Carl J., Selkirk, H. B., Sensoy, Serhat, Shi, Lei, Shiklomanov, A. I., Shiklomanov, Nikolai I., Shimpo, A., Shuman, Christopher A., Siegel, David A., Sima, Fatou, Simmons, Adrian J., Smeets, C. J.P.P., Smith, Adam, Smith, Sharon L., Soden, B., Sofieva, Viktoria, Sparks, T. H., Spence, Jacqueline, Spencer, R. G.M., Spillane, Sandra, Srivastava, A. K., Stabeno, P. J., Stackhouse, Paul W., Stammerjohn, Sharon, Stanitski, Diane M., Steinbrecht, Wolfgang, Stella, José L., Stengel, M., Stephenson, Tannecia S., Strahan, Susan E., Streeter, Casey, Streletskiy, Dimitri A., Sun-Mack, Sunny, Suslova, A., Sutton, Adrienne J., Swart, Sebastiann, Sweet, William, Takahashi, Kenneth S., Tank, S. E., Taylor, Michael A., Tedesco, M., Thackeray, S. J., Thompson, Philip R., Timbal, Bertrand, Timmermans, M. L., Tobin, Skie, Tømmervik, H., Tourpali, Kleareti, Trachte, Katja, Tretiakov, M., Trewin, Blair C., Triñanes, Joaquin A., Trotman, Adrian R., Tschudi, Mark, Tye, Mari R., van As, D., van de Wal, R. S.W., van der A, Ronald J., van der Schalie, Robin, van der Schrier, Gerard, van der Werf, Guido R., van Heerwaarden, Chiel, Van Meerbeeck, Cedric J., Verburg, Piet, Vieira, G., Vincent, Lucie A., Vömel, Holger, Vose, Russell S., Walker, D. A., Walsh, J. E., Wang, Bin, Wang, Hui, Wang, Lei, Wang, M., Wang, Mengqiu, Wang, Ray, Wang, Sheng Hung, Wanninkhof, Rik, Watanabe, Shohei, Weber, Mark, Webster, Melinda, Weerts, Albrecht, Weller, Robert A., Westberry, Toby K., Weyhenmeyer, Gesa A., Widlansky, Matthew J., Wijffels, Susan E., Wilber, Anne C., Wild, Jeanette D., Willett, Kate M., Wong, Takmeng, Wood, E. F., Woolway, R. Iestyn, Xue, Yan, Yin, Xungang, Yu, Lisan, Zambrano, Eduardo, Zeyaeyan, Sadegh, Zhang, Huai Min, Zhang, Peiqun, Zhao, Guanguo, Zhao, Lin, Zhou, Xinjia, Zhu, Zhiwei, Ziemke, Jerry R., Ziese, Markus, Andersen, Andrea, Griffin, Jessicca, Hammer, Gregory, Love-Brotak, S. Elizabeth, Misch, Deborah J., Riddle, Deborah B., Veasey, Sara W., Processus et interactions de fine échelle océanique (PROTEO), Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN), Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Océan et variabilité du climat (VARCLIM), Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU), Berry, David, Jevrejeva, Svetlana, King, Brian, and Domingues, Catia
Subjects: Surface (mathematics), Atmospheric Science, Materials science, 010504 meteorology & atmospheric sciences, 0207 environmental engineering, Mineralogy, [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph], 02 engineering and technology, 01 natural sciences, ComputingMethodologies_DOCUMENTANDTEXTPROCESSING, SDG 13 - Climate Action, SDG 14 - Life Below Water, 020701 environmental engineering, GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries), ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences
Abstract: In 2018, the dominant greenhouse gases released into Earth's atmosphere-carbon dioxide, methane, and nitrous oxide-continued their increase. The annual global average carbon dioxide concentration at Earth's surface was 407.4 ± 0.1 ppm, the highest in the modern instrumental record and in ice core records dating back 800 000 years. Combined, greenhouse gases and several halogenated gases contribute just over 3 W m−2 to radiative forcing and represent a nearly 43% increase since 1990. Carbon dioxide is responsible for about 65% of this radiative forcing. With a weak La Niña in early 2018 transitioning to a weak El Niño by the year's end, the global surface (land and ocean) temperature was the fourth highest on record, with only 2015 through 2017 being warmer. Several European countries reported record high annual temperatures. There were also more high, and fewer low, temperature extremes than in nearly all of the 68-year extremes record. Madagascar recorded a record daily temperature of 40.5°C in Morondava in March, while South Korea set its record high of 41.0°C in August in Hongcheon. Nawabshah, Pakistan, recorded its highest temperature of 50.2°C, which may be a new daily world record for April. Globally, the annual lower troposphere temperature was third to seventh highest, depending on the dataset analyzed. The lower stratospheric temperature was approximately fifth lowest. The 2018 Arctic land surface temperature was 1.2°C above the 1981-2010 average, tying for third highest in the 118-year record, following 2016 and 2017. June's Arctic snow cover extent was almost half of what it was 35 years ago. Across Greenland, however, regional summer temperatures were generally below or near average. Additionally, a satellite survey of 47 glaciers in Greenland indicated a net increase in area for the first time since records began in 1999. Increasing permafrost temperatures were reported at most observation sites in the Arctic, with the overall increase of 0.1°-0.2°C between 2017 and 2018 being comparable to the highest rate of warming ever observed in the region. On 17 March, Arctic sea ice extent marked the second smallest annual maximum in the 38-year record, larger than only 2017. The minimum extent in 2018 was reached on 19 September and again on 23 September, tying 2008 and 2010 for the sixth lowest extent on record. The 23 September date tied 1997 as the latest sea ice minimum date on record. First-year ice now dominates the ice cover, comprising 77% of the March 2018 ice pack compared to 55% during the 1980s. Because thinner, younger ice is more vulnerable to melting out in summer, this shift in sea ice age has contributed to the decreasing trend in minimum ice extent. Regionally, Bering Sea ice extent was at record lows for almost the entire 2017/18 ice season. For the Antarctic continent as a whole, 2018 was warmer than average. On the highest points of the Antarctic Plateau, the automatic weather station Relay (74°S) broke or tied six monthly temperature records throughout the year, with August breaking its record by nearly 8°C. However, cool conditions in the western Bellingshausen Sea and Amundsen Sea sector contributed to a low melt season overall for 2017/18. High SSTs contributed to low summer sea ice extent in the Ross and Weddell Seas in 2018, underpinning the second lowest Antarctic summer minimum sea ice extent on record. Despite conducive conditions for its formation, the ozone hole at its maximum extent in September was near the 2000-18 mean, likely due to an ongoing slow decline in stratospheric chlorine monoxide concentration. Across the oceans, globally averaged SST decreased slightly since the record El Niño year of 2016 but was still far above the climatological mean. On average, SST is increasing at a rate of 0.10° ± 0.01°C decade−1 since 1950. The warming appeared largest in the tropical Indian Ocean and smallest in the North Pacific. The deeper ocean continues to warm year after year. For the seventh consecutive year, global annual mean sea level became the highest in the 26-year record, rising to 81 mm above the 1993 average. As anticipated in a warming climate, the hydrological cycle over the ocean is accelerating: dry regions are becoming drier and wet regions rainier. Closer to the equator, 95 named tropical storms were observed during 2018, well above the 1981-2010 average of 82. Eleven tropical cyclones reached Saffir-Simpson scale Category 5 intensity. North Atlantic Major Hurricane Michael's landfall intensity of 140 kt was the fourth strongest for any continental U.S. hurricane landfall in the 168-year record. Michael caused more than 30 fatalities and $25 billion (U.S. dollars) in damages. In the western North Pacific, Super Typhoon Mangkhut led to 160 fatalities and $6 billion (U.S. dollars) in damages across the Philippines, Hong Kong, Macau, mainland China, Guam, and the Northern Mariana Islands. Tropical Storm Son-Tinh was responsible for 170 fatalities in Vietnam and Laos. Nearly all the islands of Micronesia experienced at least moderate impacts from various tropical cyclones. Across land, many areas around the globe received copious precipitation, notable at different time scales. Rodrigues and Réunion Island near southern Africa each reported their third wettest year on record. In Hawaii, 1262 mm precipitation at Waipā Gardens (Kauai) on 14-15 April set a new U.S. record for 24-h precipitation. In Brazil, the city of Belo Horizonte received nearly 75 mm of rain in just 20 minutes, nearly half its monthly average. Globally, fire activity during 2018 was the lowest since the start of the record in 1997, with a combined burned area of about 500 million hectares. This reinforced the long-term downward trend in fire emissions driven by changes in land use in frequently burning savannas. However, wildfires burned 3.5 million hectares across the United States, well above the 2000-10 average of 2.7 million hectares. Combined, U.S. wildfire damages for the 2017 and 2018 wildfire seasons exceeded $40 billion (U.S. dollars).
Published: 2019
Full Text: View/download PDF

12. State of the climate in 2017

Author: Abernethy, R., Ackerman, Steven A., Adler, R., Albanil Encarnación, Adelina, Aldeco, Laura S., Alfaro, Eric J., Aliaga-Nestares, Vannia, Allan, Richard P., Allan, Rob, Alves, Lincoln M., Amador, Jorge A., Anderson, John, Andreassen, L. M., Argüez, Anthony, Armitage, C., Arndt, Derek S., Avalos, Grinia, Azorin-Molina, César, Báez, Julián, Bardin, M. Yu, Barichivich, Jonathan, Baringer, Molly O., Barreira, Sandra, Baxter, Stephen, Beck, H. E., Becker, Andreas, Bedka, Kristopher M., Behe, Carolina, Bell, Gerald D., Bellouin, Nicolas, Belmont, M., Benedetti, Angela, Bernhard, G. H., Berrisford, Paul, Berry, David I., Bhatt, U. S., Bissolli, Peter, Bjerke, J., Blake, Eric S., Blenkinsop, Stephen, Blunden, Jessica, Bolmgren, K., Bosilovich, Michael G., Boucher, Olivier, Bouchon, Marilú, Box, J. E., Boyer, Tim, Braathen, Geir O., Bromwich, David H., Brown, R., Buehler, S., Bulygina, Olga N., Burgess, D., Calderón, Blanca, Camargo, Suzana J., Campbell, Ethan C., Campbell, Jayaka D., Cappelen, J., Carrea, Laura, Carter, Brendan R., Castro, Anabel, Chambers, Don P., Cheng, Lijing, Christiansen, Hanne H., Christy, John R., Chung, E. S., Clem, Kyle R., Coelho, Caio A.S., Coldewey-Egbers, Melanie, Colwell, Steve, Cooper, Owen R., Copland, L., Costanza, Carol, Covey, Curt, Coy, Lawrence, Cronin, T., Crouch, Jake, Cruzado, Luis, Daniel, Raychelle, Davis, Sean M., Davletshin, S. G., De Eyto, Elvira, De Jeu, Richard A.M., De La Cour, Jacqueline L., De Laat, Jos, De Gasperi, Curtis L., Degenstein, Doug, Deline, P., Demircan, Mesut, Derksen, C., Dewitte, Boris, Dhurmea, R., Di Girolamo, Larry, Diamond, Howard J., Dickerson, C., Dlugokencky, Ed J., Dohan, Kathleen, Dokulil, Martin T., Dolman, A. Johannes, Domingues, Catia M., Domingues, Ricardo, Donat, Markus G., Dong, Shenfu, Dorigo, Wouter A., Drozdov, D. S., Dunn, Robert J.H., Durre, Imke, Dutton, Geoff S., Eakin, C. Mark, El Kharrim, M., Elkins, James W., Epstein, H. E., Espinoza, Jhan C., Famiglietti, James S., Farmer, J., Farrell, S., Fauchald, P., Fausto, R. S., Feely, Richard A., Feng, Z., Fenimore, Chris, Fettweis, X., Fioletov, Vitali E., Flemming, Johannes, Fogt, Ryan L., Folland, Chris, Forbes, B. C., Foster, Michael J., Francis, S. D., Franz, Bryan A., Frey, Richard A., Frith, Stacey M., Froidevaux, Lucien, Ganter, Catherine, Geiger, Erick F., Gerland, S., Gilson, John, Gobron, Nadine, Goldenberg, Stanley B., Gomez, Andrea M., Goni, Gustavo, Grooß, Jens Uwe, Gruber, Alexander, Guard, Charles P., Gugliemin, Mario, Gupta, S. K., Gutiérrez, Dimitri, Haas, C., Hagos, S., Hahn, Sebastian, Haimberger, Leo, Hall, Brad D., Halpert, Michael S., Hamlington, Benjamin D., Hanna, E., Hansen, K., Hanssen-Bauer, L., Harris, Ian, Hartfield, Gail, Heidinger, Andrew K., Heim, Richard R., Helfrich, S., Hemming, D. L., Hendricks, S., Hernández, Rafael, Hernández, Sosa Marieta, Heron, Scott F., Heuzé, C., Hidalgo, Hugo G., Ho, Shu Peng, Hobbs, William R., Horstkotte, T., Huang, Boyin, Hubert, Daan, Hueuzé, Céline, Hurst, Dale F., Ialongo, Iolanda, Ibrahim, M. M., Ijampy, J. A., Inness, Antje, Isaac, Victor, Isaksen, K., Ishii, Masayoshi, Jacobs, Stephanie J., Jeffries, Martin O., Jevrejeva, Svetlana, Jiménez, C., Jin, Xiangze, John, Viju, Johns, William E., Johnsen, Bjørn, Johnson, Bryan, Johnson, Gregory C., Johnson, Kenneth S., Jones, Philip D., Jumaux, Guillaume, Kabidi, Khadija, Kaiser, J. W., Karaköylü, Erdem M., Kato, Seiji, Kazemi, A., Keller, Linda M., Kennedy, John, Kerr, Kenneth, Khan, M. S., Kholodov, A. L., Khoshkam, Mahbobeh, Killick, Rachel, Kim, Hyungjun, Kim, S. J., Klotzbach, Philip J., Knaff, John A., Kohler, J., Korhonen, Johanna, Korshunova, Natalia N., Kramarova, Natalya, Kratz, D. P., Kruger, Andries, Kruk, Michael C., Krumpen, T., Ladd, C., Lakatos, Mónika, Lakkala, Kaisa, Lander, Mark A., Landschützer, Peter, Landsea, Chris W., Lankhorst, Matthias, Lavado-Casimiro, Waldo, Lazzara, Matthew A., Lee, S. E., Lee, T. C., Leuliette, Eric, L'Heureux, Michelle, Li, Tim, Lieser, Jan L., Lin, I. I., Mears, Carl A., Liu, Gang, Li, Bailing, Liu, Hongxing, Locarnini, Ricardo, Loeb, Norman G., Long, Craig S., López, Luis A., Lorrey, Andrew M., Loyola, Diego, Lumpkin, Rick, Luo, Jing Jia, Luojus, K., Luthcke, S., Macias-Fauria, M., Malkova, G. V., Manney, Gloria L., Marcellin, Vernie, Marchenko, S. S., Marengo, José A., Marín, Dora, Marra, John J., Marszelewski, Wlodzimierz, Martens, B., Martin, A., Martínez, Alejandra G., Martínez-Güingla, Rodney, Martínez-Sánchez, Odalys, Marsh, Benjamin L., Lyman, John M., Massom, Robert A., May, Linda, Mayer, Michael, Mazloff, Matthew, McBride, Charlotte, McCabe, M. F., McCarthy, Mark, Meier, W., Meijers, Andrew J.S., Mekonnen, Ademe, Mengistu Tsidu, G., Menzel, W. Paul, Merchant, Christopher J., Meredith, Michael P., Merrifield, Mark A., Miller, Ben, Miralles, Diego G., Mitchum, Gary T., Mitro, Sukarni, Moat, Ben, Mochizuki, Y., Monselesan, Didier, Montzka, Stephen A., Mora, Natalie, Morice, Colin, Mosquera-Vásquez, Kobi, Mostafa, Awatif E., Mote, T., Mudryk, L., Mühle, Jens, Mullan, A. Brett, Müller, Rolf, Myneni, R., Nash, Eric R., Nerem, R. Steven, Newman, L., Newman, Paul A., Nielsen-Gammon, John W., Nieto, Juan José, Noetzli, Jeannette, Noll, Ben E., O'Neel, S., Osborn, Tim J., Osborne, Emily, Overland, J., Oyunjargal, Lamjav, Park, T., Pasch, Richard J., Pascual-Ramírez, Reynaldo, Pastor Saavedra, Maria Asuncion, Paterson, Andrew M., Paulik, Christoph, Pearce, Petra R., Peltier, Alexandre, Pelto, Mauri S., Peng, Liang, Perkins-Kirkpatrick, Sarah E., Perovich, Don, Petropavlovskikh, Irina, Pezza, Alexandre B., Phillips, C., Phillips, David, Phoenix, G., Pinty, Bernard, Pinzon, J., Po-Chedley, S., Polashenski, C., Purkey, Sarah G., Quispe, Nelson, Rajeevan, Madhavan, Rakotoarimalala, C., Rayner, Darren, Raynolds, M. K., Reagan, James, Reid, Phillip, Reimer, Christoph, Rémy, Samuel, Revadekar, Jayashree V., Richardson, A. D., Richter-Menge, Jacqueline, Ricker, R., Rimmer, Alon, Robinson, David A., Rodell, Matthew, Rodriguez Camino, Ernesto, Romanovsky, Vladimir E., Ronchail, Josyane, Rosenlof, Karen H., Rösner, Benjamin, Roth, Chris, Roth, David Mark, Rusak, James A., Rutishäuser, T., Sallée, Jean Bapiste, Sánchez-Lugo, Ahira, Santee, Michelle L., Sasgen, L., Sawaengphokhai, P., Sayad, T. A., Sayouri, Amal, Scambos, Ted A., Scanlon, T., Schenzinger, Verena, Schladow, S. Geoffrey, Schmid, Claudia, Schmid, Martin, Schreck, Carl J., Selkirk, H. B., Send, Uwe, Sensoy, Serhat, Sharp, M., Shi, Lei, Shiklomanov, Nikolai I., Shimaraeva, Svetlana V., Siegel, David A., Silow, Eugene, Sima, Fatou, Simmons, Adrian J., Skirving, William J., Smeed, David A., Smeets, C. J.P.P., Smith, Adam, Smith, Sharon L., Soden, B., Sofieva, Viktoria, Sparks, T. H., Spence, Jacqueline M., Spillane, Sandra, Srivastava, A. K., Stackhouse, Paul W., Stammerjohn, Sharon, Stanitski, Diane M., Steinbrecht, Wolfgang, Stella, José L., Stengel, M., Stephenson, Kimberly, Stephenson, Tannecia S., Strahan, Susan, Streletskiy, Dimitri A., Strong, Alan E., Sun-Mack, Sunny, Sutton, Adrienne J., Swart, Sebastiaan, Sweet, William, Takahashi, Kenneth S., Tamar, Gerard, Taylor, Michael A., Tedesco, M., Thackeray, S. J., Thoman, R. L., Thompson, Philip, Thomson, L., Thorsteinsson, T., Timbal, Bertrand, Timmermans, M. L., TImofeyev, Maxim A., Tirak, Kyle V., Tobin, Skie, Togawa, H., Tømmervik, H., Tourpali, Kleareti, Trachte, Katja, Trewin, Blair C., Triñanes, Joaquin A., Trotman, Adrian R., Tschudi, M., Tucker, C. J., Tye, Mari R., Van As, D., Van De Wal, R. S.W., Van Der Ronald, J. A., Van Der Schalie, Robin, Van Der Schrier, Gerard, Van Der Werf, Guido R., Van Meerbeeck, Cedric J., Velden, Christopher S., Velicogna, I., Verburg, Piet, Vickers, H., Vincent, Lucie A., Vömel, Holger, Vose, Russell S., Wagner, Wolfgang, Walker, D. A., Walsh, J., Wang, Bin, Wang, Junhong, Wang, Lei, Wang, M., Wang, Ray, Wang, Sheng Hung, Wanninkhof, Rik, Watanabe, Shohei, Weber, Mark, Webster, M., Weller, Robert A., Westberry, Toby K., Weyhenmeyer, Gesa A., Whitewood, Robert, Widlansky, Matthew J., Wiese, David N., Wijffels, Susan E., Wilber, Anne C., Wild, Jeanette D., Willett, Kate M., Willis, Josh K., Wolken, G., Wong, Takmeng, Wood, E. F., Wood, K., Woolway, R. Iestyn, Wouters, B., Xue, Yan, Yin, Xungang, Yoon, Huang, York, A., Yu, Lisan, Zambrano, Eduardo, Zhang, Huai Min, Zhang, Peiqun, Zhao, Guanguo, Zhao, Lin, Zhu, Zhiwei, Ziel, R., Ziemke, Jerry R., Ziese, Markus G., Griffin, Jessicca, Hammer, Gregory, Love-Brotak, S. Elizabeth, Misch, Deborah J., Riddle, Deborah B., Slagle, Mary, Sprain, Mara, Veasey, Sara W., McVicar, Tim R., Sub Dynamics Meteorology, Sub Soft Condensed Matter, LS Religiewetenschap, Sub Atmospheric physics and chemistry, Zonder bezoldiging NED, LS Taalverwerving, Leerstoel Tubergen, Afd Chemical Biology and Drug Discovery, Hafd Faculteitsbureau GW, Afd Pharmacology, Dep IRAS, Marine and Atmospheric Research, and OFR - Religious Studies
Subjects: Atmospheric Science
Abstract: In 2017, the dominant greenhouse gases released into Earth's atmosphere-carbon dioxide, methane, and nitrous oxide-reached new record highs. The annual global average carbon dioxide concentration at Earth's surface for 2017 was 405.0 ± 0.1 ppm, 2.2 ppm greater than for 2016 and the highest in the modern atmospheric measurement record and in ice core records dating back as far as 800 000 years. The global growth rate of CO2 has nearly quadrupled since the early 1960s. With ENSO-neutral conditions present in the central and eastern equatorial Pacific Ocean during most of the year and weak La Niña conditions notable at the start and end, the global temperature across land and ocean surfaces ranked as the second or third highest, depending on the dataset, since records began in the mid-to-late 1800s. Notably, it was the warmest non-El Niño year in the instrumental record. Above Earth's surface, the annual lower tropospheric temperature was also either second or third highest according to all datasets analyzed. The lower stratospheric temperature was about 0.2°C higher than the record cold temperature of 2016 according to most of the in situ and satellite datasets. Several countries, including Argentina, Uruguay, Spain, and Bulgaria, reported record high annual temperatures. Mexico broke its annual record for the fourth consecutive year. On 27 January, the temperature reached 43.4°C at Puerto Madryn, Argentina-the highest temperature recorded so far south (43°S) anywhere in the world. On 28 May in Turbat, western Pakistan, the high of 53.5°C tied Pakistan's all-time highest temperature and became the world-record highest temperature for May. In the Arctic, the 2017 land surface temperature was 1.6°C above the 1981-2010 average, the second highest since the record began in 1900, behind only 2016. The five highest annual Arctic temperatures have all occurred since 2007. Exceptionally high temperatures were observed in the permafrost across the Arctic, with record values reported in much of Alaska and northwestern Canada. In August, high sea surface temperature (SST) records were broken for the Chukchi Sea, with some regions as warm as +11°C, or 3° to 4°C warmer than the longterm mean (1982-present). According to paleoclimate studies, today's abnormally warm Arctic air and SSTs have not been observed in the last 2000 years. The increasing temperatures have led to decreasing Arctic sea ice extent and thickness. On 7 March, sea ice extent at the end of the growth season saw its lowest maximum in the 37-year satellite record, covering 8% less area than the 1981-2010 average. The Arctic sea ice minimum on 13 September was the eighth lowest on record and covered 25% less area than the long-term mean. Preliminary data indicate that glaciers across the world lost mass for the 38th consecutive year on record; the declines are remarkably consistent from region to region. Cumulatively since 1980, this loss is equivalent to slicing 22 meters off the top of the average glacier. Antarctic sea ice extent remained below average for all of 2017, with record lows during the first four months. Over the continent, the austral summer seasonal melt extent and melt index were the second highest since 2005, mostly due to strong positive anomalies of air temperature over most of the West Antarctic coast. In contrast, the East Antarctic Plateau saw record low mean temperatures in March. The year was also distinguished by the second smallest Antarctic ozone hole observed since 1988. Across the global oceans, the overall long-term SST warming trend remained strong. Although SST cooled slightly from 2016 to 2017, the last three years produced the three highest annual values observed; these high anomalies have been associated with widespread coral bleaching. The most recent global coral bleaching lasted three full years, June 2014 to May 2017, and was the longest, most widespread, and almost certainly most destructive such event on record. Global integrals of 0-700-m and 0-2000-m ocean heat content reached record highs in 2017, and global mean sea level during the year became the highest annual average in the 25-year satellite altimetry record, rising to 77 mm above the 1993 average. In the tropics, 2017 saw 85 named tropical storms, slightly above the 1981-2010 average of 82. The North Atlantic basin was the only basin that featured an above-normal season, its seventh most active in the 164-year record. Three hurricanes in the basin were especially notable. Harvey produced record rainfall totals in areas of Texas and Louisiana, including a storm total of 1538.7 mm near Beaumont, Texas, which far exceeds the previous known U.S. tropical cyclone record of 1320.8 mm. Irma was the strongest tropical cyclone globally in 2017 and the strongest Atlantic hurricane outside of the Gulf of Mexico and Caribbean on record with maximum winds of 295 km h-1. Maria caused catastrophic destruction across the Caribbean Islands, including devastating wind damage and flooding across Puerto Rico. Elsewhere, the western North Pacific, South Indian, and Australian basins were all particularly quiet. Precipitation over global land areas in 2017 was clearly above the long-term average. Among noteworthy regional precipitation records in 2017, Russia reported its second wettest year on record (after 2013) and Norway experienced its sixth wettest year since records began in 1900. Across India, heavy rain and flood-related incidents during the monsoon season claimed around 800 lives. In August and September, above-normal precipitation triggered the most devastating floods in more than a decade in the Venezuelan states of Bolívar and Delta Amacuro. In Nigeria, heavy rain during August and September caused the Niger and Benue Rivers to overflow, bringing floods that displaced more than 100 000 people. Global fire activity was the lowest since at least 2003; however, high activity occurred in parts of North America, South America, and Europe, with an unusually long season in Spain and Portugal, which had their second and third driest years on record, respectively. Devastating fires impacted British Columbia, destroying 1.2 million hectares of timber, bush, and grassland, due in part to the region's driest summer on record. In the United States, an extreme western wildfire season burned over 4 million hectares; the total costs of $18 billion tripled the previous U.S. annual wildfire cost record set in 1991.
Published: 2018

13. Kinematic observations of the mountain cryosphere using in-situ GNSS instruments.

Author: Beutel, Jan, Biri, Andreas, Buchli, Ben, Cicoira, Alessandro, Delaloye, Reynald, Forno, Reto Da, Gaertner-Roer, Isabelle, Gruber, Stephan, Gsell, Tonio, Hasler, Andreas, Lim, Roman, Limpach, Phillipe, Mayoraz, Raphael, Meyer, Matthias, Noetzli, Jeannette, Phillips, Marcia, Pointner, Eric, Raetzo, Hugo, Scapoza, Cristian, and Strozzi, Tazio
Subjects: GLOBAL Positioning System, CRYOSPHERE, ROCK glaciers, METEOROLOGICAL stations, REMOTE sensing, TUNDRAS, MASS-wasting (Geology)
Abstract: Permafrost warming is coinciding with accelerated mass movements, talking place especially in steep, mountainous topography. While this observation is backed up by evidence and analysis of both remote sensing as well as repeat terrestrial surveys undertaken since decades much knowledge is to be gained about the specific details, the variability and the processes governing these mass movements in the mountain cryosphere. This dataset collates data of continuously acquired kinematic observations obtained through in-situ Global Navigation Satellite Systems (GNSS) instruments that have been designed and implemented in a large-scale multi field-site monitoring campaign across the whole Swiss Alps. The landforms covered include rock glaciers, high-alpine steep bedrock bedrock as well as landslide sites, most of which are situated in permafrost areas. The dataset was acquired at 54 different stations situated at locations from 2304 to 4003 m a.s.l and comprises 209’948 daily positions derived through double-differential GNSS post-processing. Apart from these, the dataset contains down-sampled and cleaned time series of weather station and inclinometer data as well as the full set of GNSS observables in RINEX format. Furthermore the dataset is accompanied by tools for processing and data management in order to facilitate reuse, open alternate usage opportunities and support the life-long living data process with updates. To date this dataset has seen numerous use cases in research as well as natural-hazard mitigation and adaptation due to climate change. [ABSTRACT FROM AUTHOR]
Published: 2021
Full Text: View/download PDF

14. Gap‐filling algorithm for ground surface temperature data measured in permafrost and periglacial environments

Author: Staub, Benno, Hasler, Andreas, Noetzli, Jeannette, and Delaloye, andReynald
Abstract: Ground surface temperatures (GST) are widely measured in mountain permafrost areas, but their time series data can be interrupted by gaps. Gaps complicate the calculation of aggregates and indices required for analysing temporal and spatial variability between loggers and sites. We present an algorithm to estimate daily mean GST and the resulting uncertainty. The algorithm is designed to automatically fill data gaps in a database of several tens to hundreds of time series, for example, the Swiss Permafrost Monitoring Network (PERMOS). Using numerous randomly generated artificial gaps, we validated the performance of the gap-filling routine in terms of (1) the bias resulting on annual means, (2) thawing and freezing degree-days, and (3) the accuracy of the uncertainty estimation. Although quantile mapping provided the most reliable gap-filling approach overall, linear interpolation between neighbouring values performed equally well for gap durations of up to 3–5 days. Finding the most similar regressors is crucial and also the main source of errors, particularly because of the large spatial and temporal variability of ground and snow properties in high-mountain terrains. Applying the gap-filling technique to the PERMOS GST data increased the total number of complete hydrological years available for analysis by 70 per cent (>450-filled gaps), likely without exceeding a maximal uncertainty of ± 0.25 °C in calculated annual mean values
Published: 2017

15. State of the Climate in 2014

Author: Aaron-Morrison, Arlene P., Ackerman, Steven A., Adams, Nicolaus G., Adler, Robert F., Albanil, Adelina, Alfaro, E. J., Allan, Rob, Alves, Lincoln M., Amador, Jorge A., Andreassen, L. M., Arendt, A., Arévalo, Juan, Arndt, Derek S., Arzhanova, N. M., Aschan, M. M., Azorin-Molina, César, Banzon, Viva, Bardin, M. U., Barichivich, Jonathan, Baringer, Molly O., Barreira, Sandra, Baxter, Stephen, Bazo, Juan, Becker, Andreas, Bedka, Kristopher M., Behrenfeld, Michael J., Bell, Gerald D., Belmont, M., Benedetti, Angela, Bernhard, G., Berrisford, Paul, Berry, David I., Bettolli, María L., Bhatt, U. S., Bidegain, Mario, Bill, Brian D., Billheimer, Sam, Bissolli, Peter, Blake, Eric S., Blunden, Jessica, Bosilovich, Michael G., Boucher, Olivier, Boudet, Dagne, Box, J. E., Boyer, Tim, Braathen, Geir O., Bromwich, David H., Brown, R., Bulygina, Olga N., Burgess, D., Calderón, Blanca, Camargo, Suzana J., Campbell, Jayaka D., Cappelen, J., Carrasco, Gualberto, Carter, Brendan R., Chambers, Don P., Chandler, Elise, Christiansen, Hanne H., Christy, John R., Chung, Daniel, Chung, E. S., Cinque, Kathy, Clem, Kyle R., Coelho, Caio A., Cogley, J. G., Coldewey-Egbers, Melanie, Colwell, Steve, Cooper, Owen R., Copland, L., Cosca, Catherine E., Cross, Jessica N., Crotwell, Molly J., Crouch, Jake, Davis, Sean M., De Eyto, Elvira, De Jeu, Richard A.M., De Laat, Jos, Degasperi, Curtis L., Degenstein, Doug, Demircan, M., Derksen, C., Destin, Dale, Di Girolamo, Larry, Di Giuseppe, F., Diamond, Howard J., Dlugokencky, Ed J., Dohan, Kathleen, Dokulil, Martin T., Dolgov, A. V., Dolman, A. Johannes, Domingues, Catia M., Donat, Markus G., Dong, Shenfu, Dorigo, Wouter A., Dortch, Quay, Doucette, Greg, Drozdov, D. S., Ducklow, Hugh, Dunn, Robert J.H., Durán-Quesada, Ana M., Dutton, Geoff S., Ebrahim, A., Elkharrim, M., Elkins, James W., Espinoza, Jhan C., Etienne-Leblanc, Sheryl, Evans, Thomas E., Famiglietti, James S., Farrell, S., Fateh, S., Fausto, Robert S., Fedaeff, Nava, Feely, Richard A., Feng, Z., Fenimore, Chris, Fettweis, X., Fioletov, Vitali E., Flemming, Johannes, Fogarty, Chris T., Fogt, Ryan L., Folland, Chris, Fonseca, C., Fossheim, M., Foster, Michael J., Fountain, Andrew, Francis, S. D., Franz, Bryan A., Frey, Richard A., Frith, Stacey M., Froidevaux, Lucien, Ganter, Catherine, Garzoli, Silvia, Gerland, S., Gobron, Nadine, Goldenberg, Stanley B., Gomez, R. Sorbonne, Goni, Gustavo, Goto, A., Grooß, J. U., Gruber, Alexander, Guard, Charles Chip, Gugliemin, Mauro, Gupta, S. K., Gutiérrez, J. M., Hagos, S., Hahn, Sebastian, Haimberger, Leo, Hakkarainen, J., Hall, Brad D., Halpert, Michael S., Hamlington, Benjamin D., Hanna, E., Hansen, K., Hanssen-Bauer, I., Harris, Ian, Heidinger, Andrew K., Heikkilä, A., Heil, A., Heim, Richard R., Hendricks, S., Hernández, Marieta, Hidalgo, Hugo G., Hilburn, Kyle, Ho, Shu Peng Ben, Holmes, R. M., Hu, Zeng Zhen, Huang, Boyin, Huelsing, Hannah K., Huffman, George J., Hughes, C., Hurst, Dale F., Ialongo, I., Ijampy, J. A., Ingvaldsen, R. B., Inness, Antje, Isaksen, K., Ishii, Masayoshi, Jevrejeva, Svetlana, Jiménez, C., Jin, Xiangze, Johannesen, E., John, Viju, Johnsen, B., Johnson, Bryan, Johnson, Gregory C., Jones, Philip D., Joseph, Annie C., Jumaux, Guillaume, Kabidi, Khadija, Kaiser, Johannes W., Kato, Seiji, Kazemi, A., Keller, Linda M., Kendon, Mike, Kennedy, John, Kerr, Kenneth, Kholodov, A. L., Khoshkam, Mahbobeh, Killick, Rachel, Kim, Hyungjun, Kim, S. J., Kimberlain, Todd B., Klotzbach, Philip J., Knaff, John A., Kobayashi, Shinya, Kohler, J., Korhonen, Johanna, Korshunova, Natalia N., Kovacs, K. M., Kramarova, Natalya, Kratz, D. P., Kruger, Andries, Kruk, Michael C., Kudela, Raphael, Kumar, Arun, Lakatos, M., Lakkala, K., Lander, Mark A., Landsea, Chris W., Lankhorst, Matthias, Lantz, Kathleen, Lazzara, Matthew A., Lemons, P., Leuliette, Eric, L’Heureux, Michelle, Lieser, Jan L., Lin, I. I., Liu, Hongxing, Liu, Yinghui, Locarnini, Ricardo, Loeb, Norman G., Lo Monaco, Claire, Long, Craig S., López Álvarez, Luis Alfonso, Lorrey, Andrew M., Loyola, Diego, Lumpkin, Rick, Luo, Jing Jia, Luojus, K., Lydersen, C., Lyman, John M., Maberly, Stephen C., Maddux, Brent C., Malheiros Ramos, Andrea, Malkova, G. V., Manney, G., Marcellin, Vernie, Marchenko, S. S., Marengo, José A., Marra, John J., Marszelewski, Wlodzimierz, Martens, B., Martínez-Güingla, Rodney, Massom, Robert A., Mata, Mauricio M., Mathis, Jeremy T., May, Linda, Mayer, Michael, Mazloff, Matthew, McBride, Charlotte, McCabe, M. F., McCarthy, M., McClelland, J. W., McGree, Simon, McVicar, Tim R., Mears, Carl A., Meier, W., Meinen, Christopher S., Mekonnen, A., Menéndez, Melisa, Mengistu Tsidu, G., Menzel, W. Paul, Merchant, Christopher J., Meredith, Michael P., Merrifield, Mark A., Metzl, N., Minnis, Patrick, Miralles, Diego G., Mistelbauer, T., Mitchum, Gary T., Monselesan, Didier, Monteiro, Pedro, Montzka, Stephen A., Morice, Colin, Mote, T., Mudryk, L., Mühle, Jens, Mullan, A. Brett, Nash, Eric R., Naveira-Garabato, Alberto C., Nerem, R. Steven, Newman, Paul A., Nieto, Juan José, Noetzli, Jeannette, O’Neel, S., Osborn, Tim J., Overland, J., Oyunjargal, Lamjav, Parinussa, Robert M., Park, E. Hyung, Parker, David, Parrington, M., Parsons, A. Rost, Pasch, Richard J., Pascual-Ramírez, Reynaldo, Paterson, Andrew M., Paulik, Christoph, Pearce, Petra R., Pelto, Mauri S., Peng, Liang, Perkins-Kirkpatrick, Sarah E., Perovich, D., Petropavlovskikh, Irina, Pezza, Alexandre B., Phillips, David, Pinty, Bernard, Pitts, Michael C., Pons, M. R., Porter, Avalon O., Primicerio, R., Proshutinsky, A., Quegan, Sean, Quintana, Juan, Rahimzadeh, Fatemeh, Rajeevan, Madhavan, Randriamarolaza, L., Razuvaev, Vyacheslav N., Reagan, James, Reid, Phillip, Reimer, Christoph, Rémy, Samuel, Renwick, James A., Revadekar, Jayashree V., Richter-Menge, J., Riffler, Michael, Rimmer, Alon, Rintoul, Steve, Robinson, David A., Rodell, Matthew, Rodríguez Solís, José L., Romanovsky, Vladimir E., Ronchail, Josyane, Rosenlof, Karen H., Roth, Chris, Rusak, James A., Sabine, Christopher L., Sallée, Jean Bapiste, Sánchez-Lugo, Ahira, Santee, Michelle L., Sawaengphokhai, P., Sayouri, Amal, Scambos, Ted A., Schemm, Jae, Schladow, S. Geoffrey, Schmid, Claudia, Schmid, Martin, Schmidtko, Sunke, Schreck, Carl J., Selkirk, H. B., Send, Uwe, Sensoy, Serhat, Setzer, Alberto, Sharp, M., Shaw, Adrian, Shi, Lei, Shiklomanov, A. I., Shiklomanov, Nikolai I., Siegel, David A., Signorini, Sergio R., Sima, Fatou, Simmons, Adrian J., Smeets, C. J.P.P., Smith, Sharon L., Spence, Jaqueline M., Srivastava, A. K., Stackhouse, Paul W., Stammerjohn, Sharon, Steinbrecht, Wolfgang, Stella, José L., Stengel, Martin, Stennett-Brown, Roxann, Stephenson, Tannecia S., Strahan, Susan, Streletskiy, D. A., Sun-Mack, Sunny, Swart, Sebastiaan, Sweet, William, Talley, Lynne D., Tamar, Gerard, Tank, S. E., Taylor, Michael A., Tedesco, M., Teubner, Katrin, Thoman, R. L., Thompson, Philip, Thomson, L., Timmermans, M. L., Tirnanes, Joaquin A., Tobin, Skie, Trachte, Katja, Trainer, Vera L., Tretiakov, M., Trewin, Blair C., Trotman, Adrian R., Tschudi, M., Van As, D., Van De Wal, R. S.W., van der A., Ronald J., Van Der Schalie, Robin, Van Der Schrier, Gerard, Van Der Werf, Guido R., Van Meerbeeck, Cedric J., Velicogna, I., Verburg, Piet, Vigneswaran, Bala, Vincent, Lucie A., Volkov, Denis, Vose, Russell S., Wagner, Wolfgang, Wåhlin, Anna, Wahr, J., Walsh, J., Wang, Chunzai, Wang, Junhong, Wang, Lei, Wang, M., Wang, Sheng Hung, Wanninkhof, Rik, Watanabe, Shohei, Weber, Mark, Weller, Robert A., Weyhenmeyer, Gesa A., Whitewood, Robert, Wijffels, Susan E., Wilber, Anne C., Wild, Jeanette D., Willett, Kate M., Williams, Michael J.M., Willie, Shem, Wolken, G., Wong, Takmeng, Wood, E. F., Woolway, R. Iestyn, Wouters, B., Xue, Yan, Yamada, Ryuji, Yim, So Young, Yin, Xungang, Young, Steven H., Yu, Lisan, Zahid, H., Zambrano, Eduardo, Zhang, Peiqun, Zhao, Guanguo, Zhou, Lin, Ziemke, Jerry R., Love-Brotak, S. Elizabeth, Gilbert, Kristin, Maycock, Tom, Osborne, Susan, Sprain, Mara, Veasey, Sara W., Ambrose, Barbara J., Griffin, Jessicca, Misch, Deborah J., Riddle, Deborah B., Young, Teresa, Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), ICOS-ATC (ICOS-ATC), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Modélisation INVerse pour les mesures atmosphériques et SATellitaires (SATINV), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), and Earth and Climate
Subjects: 0106 biological sciences, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, Atmospheric Science, 010504 meteorology & atmospheric sciences, 010604 marine biology & hydrobiology, Perspective (graphical), 15. Life on land, 01 natural sciences, El Niño Southern Oscillation, 13. Climate action, Climatology, SDG 13 - Climate Action, Environmental science, SDG 14 - Life Below Water, [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences
Abstract: Most of the dozens of essential climate variables monitored each year in this report continued to follow their long-term trends in 2014, with several setting new records. Carbon dioxide, methane, and nitrous oxide-the major greenhouse gases released into Earth's atmosphere-once again all reached record high average atmospheric concentrations for the year. Carbon dioxide increased by 1.9 ppm to reach a globally averaged value of 397.2 ppm for 2014. Altogether, 5 major and 15 minor greenhouse gases contributed 2.94 W m-2 of direct radiative forcing, which is 36% greater than their contributions just a quarter century ago. Accompanying the record-high greenhouse gas concentrations was nominally the highest annual global surface temperature in at least 135 years of modern record keeping, according to four independent observational analyses. The warmth was distributed widely around the globe's land areas, Europe observed its warmest year on record by a large margin, with close to two dozen countries breaking their previous national temperature records; many countries in Asia had annual temperatures among their 10 warmest on record; Africa reported above-average temperatures across most of the continent throughout 2014; Australia saw its third warmest year on record, following record heat there in 2013; Mexico had its warmest year on record; and Argentina and Uruguay each had their second warmest year on record. Eastern North America was the only major region to observe a below-average annual temperature. But it was the oceans that drove the record global surface temperature in 2014. Although 2014 was largely ENSO-neutral, the globally averaged sea surface temperature (SST) was the highest on record. The warmth was particularly notable in the North Pacific Ocean where SST anomalies signaled a transition from a negative to positive phase of the Pacific decadal oscillation. In the winter of 2013/14, unusually warm water in the northeast Pacific was associated with elevated ocean heat content anomalies and elevated sea level in the region. Globally, upper ocean heat content was record high for the year, reflecting the continued increase of thermal energy in the oceans, which absorb over 90% of Earth's excess heat from greenhouse gas forcing. Owing to both ocean warming and land ice melt contributions, global mean sea level in 2014 was also record high and 67 mm greater than the 1993 annual mean, when satellite altimetry measurements began. Sea surface salinity trends over the past decade indicate that salty regions grew saltier while fresh regions became fresher, suggestive of an increased hydrological cycle over the ocean expected with global warming. As in previous years, these patterns are reflected in 2014 subsurface salinity anomalies as well. With a now decade-long trans-basin instrument array along 26°N, the Atlantic meridional overturning circulation shows a decrease in transport of-4.2 ± 2.5 Sv decade-1. Precipitation was quite variable across the globe. On balance, precipitation over the world's oceans was above average, while below average across land surfaces. Drought continued in southeastern Brazil and the western United States. Heavy rain during April-June led to devastating floods in Canada's Eastern Prairies. Above-normal summer monsoon rainfall was observed over the southern coast of West Africa, while drier conditions prevailed over the eastern Sahel. Generally, summer monsoon rainfall over eastern Africa was above normal, except in parts of western South Sudan and Ethiopia. The south Asian summer monsoon in India was below normal, with June record dry. Across the major tropical cyclone basins, 91 named storms were observed during 2014, above the 1981-2010 global average of 82. The Eastern/Central Pacific and South Indian Ocean basins experienced significantly above-normal activity in 2014; all other basins were either at or below normal. The 22 named storms in the Eastern/Central Pacific was the basin's most since 1992. Similar to 2013, the North Atlantic season was quieter than most years of the last two decades with respect to the number of storms, despite the absence of El Niño conditions during both years. In higher latitudes and at higher elevations, increased warming continued to be visible in the decline of glacier mass balance, increasing permafrost temperatures, and a deeper thawing layer in seasonally frozen soil. In the Arctic, the 2014 temperature over land areas was the fourth highest in the 115-year period of record and snow melt occurred 20-30 days earlier than the 1998-2010 average. The Greenland Ice Sheet experienced extensive melting in summer 2014. The extent of melting was above the 1981-2010 average for 90% of the melt season, contributing to the second lowest average summer albedo over Greenland since observations began in 2000 and a record-low albedo across the ice sheet for August. On the North Slope of Alaska, new record high temperatures at 20-m depth were measured at four of five permafrost observatories. In September, Arctic minimum sea ice extent was the sixth lowest since satellite records began in 1979. The eight lowest sea ice extents during this period have occurred in the last eight years. Conversely, in the Antarctic, sea ice extent countered its declining trend and set several new records in 2014, including record high monthly mean sea ice extent each month from April to November. On 20 September, a record large daily Antarctic sea ice extent of 20.14 × 106 km2 occurred. The 2014 Antarctic stratospheric ozone hole was 20.9 million km2 when averaged from 7 September to 13 October, the sixth smallest on record and continuing a decrease, albeit statistically insignificant, in area since 1998.
Published: 2015
Full Text: View/download PDF

16. Permafrost

Author: Noetzli, Jeannette, Christiansen, H H, Romanovsky, V E, Shiklomanov, N I, Smith, S L, Vieira, G, Zhao, L, and University of Zurich
Subjects: 10122 Institute of Geography, 2312 Water Science and Technology, 1904 Earth-Surface Processes, 910 Geography & travel
Published: 2015
Full Text: View/download PDF

17. Distinguishing ice-rich and ice-poor permafrost to map ground temperatures and ground ice occurrence in the Swiss Alps.

Author: Kenner, Robert, Noetzli, Jeannette, Hoelzle, Martin, Raetzo, Hugo, and Phillips, Marcia
Subjects: *EARTH temperature, *PERMAFROST, *ROCK glaciers, *TALUS (Geology), *SOLAR radiation
Abstract: Mountain permafrost is invisible, and mapping it is still a challenge. Available permafrost distribution maps often overestimate the permafrost extent and include large permafrost-free areas in their permafrost zonation. In addition, the representation of the lower belt of permafrost consisting of ice-rich features such as rock glaciers or ice-rich talus slopes can be challenging. These problems are caused by considerable differences in genesis and thermal characteristics between ice-poor permafrost, occurring for example in rock walls, and ice-rich permafrost. While ice-poor permafrost shows a strong correlation of ground temperature with elevation and potential incoming solar radiation, ice-rich ground does not show such a correlation. Instead, the distribution of ice-rich ground is controlled by gravitational processes such as the relocation of ground ice by permafrost creep or by ground ice genesis from avalanche deposits or glacierets covered with talus. We therefore developed a mapping method which distinguishes between ice-poor and ice-rich permafrost and tested it for the entire Swiss Alps. For ice-poor ground we found a linear regression formula based on elevation and potential incoming solar radiation which predicts borehole ground temperatures at multiple depths with an accuracy higher than 0.6 ∘ C. The zone of ice-rich permafrost was defined by modelling the deposition zones of alpine mass wasting processes. This dual approach allows the cartographic representation of permafrost-free belts, which are bounded above and below by permafrost. This enables a high quality of permafrost modelling, as is shown by the validation of our map. The dominating influence of the two rather simple connected factors, elevation (as a proxy for mean annual air temperature) and solar radiation, on the distribution of ice-poor permafrost is significant for permafrost modelling in different climate conditions and regions. Indicating temperatures of ice-poor permafrost and distinguishing between ice-poor and ice-rich permafrost on a national permafrost map provides new information for users. [ABSTRACT FROM AUTHOR]
Published: 2019
Full Text: View/download PDF

18. A comparative user evaluation of six alternative permafrost visualizations for reading and interpreting temperature information

Author: Dall'Acqua, Luca, Cöltekin, Arzu, Noetzli, Jeannette, and University of Zurich
Subjects: 10122 Institute of Geography, 910 Geography & travel
Published: 2013
Full Text: View/download PDF

19. State of the Climate in 2012

Author: Blunden, Jessica, Arndt, Derek S., Achberger, Christine, Ackerman, Stephen A., Albanil, Adelina, Alexander, P., Alfaro, Eric J., Allan, Rob, Alves, Lincoln M., Amador, Jorge A., Ambenje, Peter, Andrianjafinirina, Solonomenjanahary, Antonov, John, Aravequia, Jose A., Arendt, A., Arevalo, Juan, Ashik, I., Atheru, Zachary, Banzon, Viva, Baringer, Molly O., Barreira, Sandra, Barriopedro, David E., Beard, Grant, Becker, Andreas, Behrenfeld, Michael J., Bell, Gerald D., Benedetti, Angela, Bernhard, Germar, Berrisford, Paul, Berry, David I., Bhatt, U., Bidegain, Mario, Bindoff, Nathan, Bissolli, Peter, Blake, Eric S., Booneeady, Raj, Bosilovich, Michael, Box, J. E., Boyer, Tim, Braathen, Geir O., Bromwich, David H., Brown, R., Brown, L., Bruhwiler, Lori, Bulygina, Olga N., Burgess, D., Burrows, John, Calderon, Blanca, Camargo, Suzana J., Campbell, Jayaka, Cao, Y., Cappelen, J., Carrasco, Gualberto, Chambers, Don P., Chang A, L., Chappell, Petra, Chehade, Wissam, Cheliah, Muthuvel, Christiansen, Hanne H., Christy, John R., Ciais, Phillipe, Coelho, Caio A. S., Cogley, J. G., Colwell, Steve, Cross, J. N., Crouch, Jake, Cunningham, Stuart A., Dacic, Milan, Jeu, Richard A. M., Dekaa, Francis S., Demircan, Mesut, Derksen, C., Diamond, Howard J., Dlugokencky, Ed J., Dohan, Kathleen, Dolman, A. Johannes, Domingues, Catia M., Dong Shenfu, Dorigo, Wouter A., Drozdov, D. S., Duguay, Claude R., Dunn, Robert J. H., Duran-Quesada, Ana M., Dutton, Geoff S., Ehmann, Christian, Elkins, James W., Euscategui, Christian, Famiglietti, James S., Fang Fan, Fauchereau, Nicolas, Feely, Richard A., Fekete, Balazs M., Fenimore, Chris, Fioletov, Vitali E., Fogarty, Chris T., Fogt, Ryan L., Folland, Chris K., Foster, Michael J., Frajka-Williams, Eleanor, Franz, Bryan A., Frith, Stacey H., Frolov, I., Ganter, Catherine, Garzoli, Silvia, Geai, M. -L, Gerland, S., Gitau, Wilson, Gleason, Karin L., Gobron, Nadine, Goldenberg, Stanley B., Goni, Gustavo, Good, Simon A., Gottschalck, Jonathan, Gregg, Margarita C., Griffiths, Georgina, Grooss, Jens-Uwe, Guard, Charles Chip, Gupta, Shashi K., Hall, Bradley D., Halpert, Michael S., Harada, Yayoi, Hauri, C., Heidinger, Andrew K., Heikkila, Anu, Heim, Richard R., Heimbach, Patrick, Hidalgo, Hugo G., Hilburn, Kyle, Ho, Shu-Peng, Hobbs, Will R., Holgate, Simon, Hovsepyan, Anahit, Hu Zeng-Zhen, Hughes, P., Hurst, Dale F., Ingvaldsen, R., Inness, Antje, Jaimes, Ena, Jakobsson, Martin, James, Adamu I., Jeffries, Martin O., Johns, William E., Johnsen, Bjorn, Johnson, Gregory C., Johnson, Bryan, Jones, Luke T., Jumaux, Guillaume, Kabidi, Khadija, Kaiser, Johannes W., Kamga, Andre, Kang, Kyun-Kuk, Kanzow, Torsten O., Kao, Hsun-Ying, Keller, Linda M., Kennedy, John J., Key, J., Khatiwala, Samar, Pour, H. Kheyrollah, Kholodov, A. L., Khoshkam, Mahbobeh, Kijazi, Agnes, Kikuchi, T., Kim, B. -M, Kim, S. -J, Kimberlain, Todd B., Knaff, John A., Korshunova, Natalia N., Koskela, T., Kousky, Vernon E., Kramarova, Natalya, Kratz, David P., Krishfield, R., Kruger, Andries, Kruk, Michael C., Kumar, Arun, Lagerloef, Gary S. E., Lakkala, K., Lander, Mark A., Landsea, Chris W., Lankhorst, Matthias, Laurila, T., Lazzara, Matthew A., Lee, Craig, Leuliette, Eric, Levitus, Sydney, L Heureux, Michelle, Lieser, Jan, Lin, I-I, Liu, Y. Y., Liu, Y., Liu Hongxing, Liu Yanju, Lobato-Sanchez, Rene, Locarnini, Ricardo, Loeb, Norman G., Loeng, H., Long, Craig S., Lorrey, Andrew M., Luhunga, P., Lumpkin, Rick, Luo Jing-Jia, Lyman, John M., Macdonald, Alison M., Maddux, Brent C., Malekela, C., Manney, Gloria, Marchenko, S. S., Marengo, Jose A., Marotzke, Jochem, Marra, John J., Martinez-Gueingla, Rodney, Massom, Robert A., Mathis, Jeremy T., Mcbride, Charlotte, Mccarthy, Gerard, Mcvicar, Tim R., Mears, Carl, Meier, W., Meinen, Christopher S., Menendez, Melisa, Merrifield, Mark A., Mitchard, Edward, Mitchum, Gary T., Montzka, Stephen A., Morcrette, Jean-Jacques, Mote, Thomas, Muehle, Jens, Muehr, Bernhard, Mullan, A. Brett, Mueller, Rolf, Nash, Eric R., Nerem, R. Steven, Newlin, Michele L., Newman, Paul A., Ng Ongolo, H., Nieto, Juan Jose, Nishino, S., Nitsche, Helga, Noetzli, Jeannette, Oberman, N. G., Obregon, Andre, Ogallo, Laban A., Oludhe, Christopher S., Omar, Mohamed I., Overland, James, Oyunjargal, Lamjav, Parinussa, Robert M., Park, Geun-Ha, Park, E-Hyung, David Berry, Pasch, Richard J., Pascual-Ramirez, Reynaldo, Pelto, Mauri S., Penalba, Olga, Peng, L., Perovich, Don K., Pezza, Alexandre B., Phillips, David, Pickart, R., Pinty, Bernard, Pitts, Michael C., Purkey, Sarah G., Quegan, Shaun, Quintana, Juan, Rabe, B., Rahimzadeh, Fatemeh, Raholijao, Nirivololona, Raiva, I., Rajeevan, Madhavan, Ramiandrisoa, Voahanginirina, Ramos, Alexandre, Ranivoarissoa, Sahondra, Rayner, Nick A., Rayner, Darren, Razuveav, Vyacheslav N., Reagan, James, Reid, Phillip, Renwick, James, Revedekar, Jayashree, Richter-Menge, Jacqueline, Rivera, Ingrid L., Robinson, David A., Rodell, Matthew, Romanovsky, Vladimir E., Ronchail, Josyane, Rosenlof, Karen H., Sabine, Christopher L., Salvador, Mozar A., Sanchez-Lugo, Ahira, Santee, Michelle L., Sasgen, I., Sawaengphokhai, P., Sayouri, Amal, Scambos, Ted A., Schauer, U., Schemm, Jae, Schlosser, P., Schmid, Claudia, Schreck, Carl, Semiletov, Igor, Send, Uwe, Sensoy, Serhat, Setzer, Alberto, Severinghaus, Jeffrey, Shakhova, Natalia, Sharp, M., Shiklomanov, Nicolai I., Siegel, David A., Silva, Viviane B. S., Silva, Frabricio D. S., Sima, Fatou, Simeonov, Petio, Simmonds, I., Simmons, Adrian, Skansi, Maria, Smeed, David A., Smethie, W. M., Smith, Adam B., Smith, Cathy, Smith, Sharon L., Smith, Thomas M., Sokolov, V., Srivastava, A. K., Stackhouse, Paul W., Stammerjohn, Sharon, Steele, M., Steffen, Konrad, Steinbrecht, Wolfgang, Stephenson, Tannecia, Su, J., Svendby, T., Sweet, William, Takahashi, Taro, Tanabe, Raymond M., Taylor, Michael A., Tedesco, Marco, Teng, William L., Thepaut, Jean-Noel, Thiaw, Wassila M., Thoman, R., Thompson, Philip, Thorne, Peter W., Timmermans, M. -L, Tobin, Skie, Toole, J., Trewin, Blair C., Trigo, Ricardo M., Trotman, Adrian, Tschudi, M., Wal, Roderik S. W., Werf, Guido R., Vautard, Robert, Vazquez, J. L., Vieira, Goncalo, Vincent, Lucie, Vose, Russ S., Wagner, Wolfgang W., Wahr, John, Walsh, J., Wang Junhong, Wang Chunzai, Wang, M., Wang Sheng-Hung, Wang Lei, Wanninkhof, Rik, Weaver, Scott, Weber, Mark, Werdell, P. Jeremy, Whitewood, Robert, Wijffels, Susan, Wilber, Anne C., Wild, J. D., Willett, Kate M., Williams, W., Willis, Joshua K., Wolken, G., Wong, Takmeng, Woodgate, R., Worthy, D., Wouters, B., Wovrosh, Alex J., Xue Yan, Yamada, Ryuji, Yin Zungang, Yu Lisan, Zhang Liangying, Zhang Peiqun, Zhao Lin, Zhao, J., Zhong, W., Ziemke, Jerry, Zimmermann, S., ICOS-ATC (ICOS-ATC), Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN), Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Extrèmes : Statistiques, Impacts et Régionalisation (ESTIMR), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), and Repositório da Universidade de Lisboa
Subjects: [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, Atmospheric Science, 13. Climate action, Photosynthetically active radiation, Climate, Dynamics (mechanics), Data_FILES, Environmental science, Fraction (chemistry), 14. Life underwater, [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment, Remote sensing
Abstract: For the first time in serveral years, the El Nino-Southern Oscillation did not dominate regional climate conditions around the globe. A weak La Ni a dissipated to ENSOneutral conditions by spring, and while El Nino appeared to be emerging during summer, this phase never fully developed as sea surface temperatures in the eastern conditions. Nevertheless, other large-scale climate patterns and extreme weather events impacted various regions during the year. A negative phase of the Arctic Oscillation from mid-January to early February contributed to frigid conditions in parts of northern Africa, eastern Europe, and western Asia. A lack of rain during the 2012 wet season led to the worst drought in at least the past three decades for northeastern Brazil. Central North America also experienced one of its most severe droughts on record. The Caribbean observed a very wet dry season and it was the Sahel's wettest rainy season in 50 years. Overall, the 2012 average temperature across global land and ocean surfaces ranked among the 10 warmest years on record. The global land surface temperature alone was also among the 10 warmest on record. In the upper atmosphere, the average stratospheric temperature was record or near-record cold, depending on the dataset. After a 30-year warming trend from 1970 to 1999 for global sea surface temperatures, the period 2000-12 had little further trend. This may be linked to the prevalence of La Ni a-like conditions during the 21st century. Heat content in the upper 700 m of the ocean remained near record high levels in 2012. Net increases from 2011 to 2012 were observed at 700-m to 2000-m depth and even in the abyssal ocean below. Following sharp decreases in to the effects of La Ni a, sea levels rebounded to reach records highs in 2012. The increased hydrological cycle seen in recent years continued, with more evaporation in drier locations and more precipitation in rainy areas. In a pattern that has held since 2004, salty areas of the ocean surfaces and subsurfaces were anomalously salty on average, while fresher areas were anomalously fresh. Global tropical cyclone activity during 2012 was near average, with a total of 84 storms compared with the 1981-2010 average of 89. Similar to 2010 and 2011, the North Atlantic was the only hurricane basin that experienced above-normal activity. In this basin, Sandy brought devastation to Cuba and parts of the eastern North American seaboard. All other basins experienced either near-or below-normal tropical cyclone activity. Only three tropical cyclones reached Category 5 intensity-all in Bopha became the only storm in the historical record to produce winds greater than 130 kt south of 7 N. It was also the costliest storm to affect the Philippines and killed more than 1000 residents. Minimum Arctic sea ice extent in September and Northern Hemisphere snow cover extent in June both reached new record lows. June snow cover extent is now declining at a faster rate (-17.6% per decade) than September sea ice extent (-13.0% per decade). Permafrost temperatures reached record high values in northernmost Alaska. A new melt extent record occurred on 11-12 July on the Greenland ice sheet; 97% of the ice sheet showed some form of melt, four times greater than the average melt for this time of year. The climate in Antarctica was relatively stable overall. The largest maximum sea ice extent since records begain in 1978 was observed in September 2012. In the stratosphere, warm air led to the second smallest ozone hole in the past two decades. Even so, the springtime ozone layer above Antarctica likely will not return to its early 1980s state until about 2060. Following a slight decline associated with the global 2 emissions from fossil fuel combustion and cement production reached a record 9.5 +/- 0.5 Pg C in 2011 and a new record of 9.7 +/- 0.5 Pg C is estimated for 2012. Atmospheric CO2 concentrations increased by 2.1 ppm in 2012, to 392.6 ppm. In spring 2012, 2 concentration exceeded 400 ppm at 7 of the 13 Arctic observation sites. Globally, other greenhouse gases including methane and nitrous oxide also continued to rise in concentration and the combined effect now represents a 32% increase in radiative forcing over a 1990 baseline. Concentrations of most ozone depleting substances continued to fall.
Published: 2013
Full Text: View/download PDF

20. Ice thawing, mountains falling - are alpine rock slope failures increasing?

Author: Huggel, Christian, Allen, Steven, Deline, Philip, Fischer, L., Noetzli, Jeannette, Ravanel, Ludovic, Glaciology, Geomorphodynamics and Geochronology, Physical Geography Division, Department of Geography, Universität Zürich [Zürich] = University of Zurich (UZH), Climate and Environmental Physics [Bern] (CEP), Physikalisches Institut [Bern], Universität Bern [Bern]-Universität Bern [Bern], Environnements, Dynamiques et Territoires de la Montagne (EDYTEM), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Glaciology and Geomorphodynamics Group, Department of geography, Glaciology, Geomorphodynamics and Geochronology, Department of Geography [Zürich], Universität Zürich [Zürich] = University of Zurich (UZH)-Universität Zürich [Zürich] = University of Zurich (UZH), and Maury, Christine
Abstract: Many high-mountain environments of the world have seen dramatic changes in the past years and decades. Glaciers are retreating and downwasting, often at a dramatically fast pace, leaving large amounts of potentially unstable debris, moraines and rock slopes behind. Although in the main invisible to the eye of an observer, permafrost, i.e. rock and debris with permanent zero or subzero temperatures, is thawing. Several slopes have become unstable and landslides potentially related to permafrost degradation have received wide-ranging attention from both scientists and the media. A number of those landslides can be related to the effects of recent changes in the cryosphere, which are ultimately driven by changes in climatic parameters, in particular temperature and precipitation.
Published: 2013

21. Ground thermal and geomechanical conditions in a permafrost-affected high-latitude rock avalanche site (Polvartinden, northern Norway).

Author: Frauenfelder, Regula, Isaksen, Ketil, Lato, Matthew J., and Noetzli, Jeannette
Subjects: AVALANCHES, ROCK deformation, PERMAFROST, SNOW accumulation, SURFACE temperature
Abstract: On 26 June 2008, a rock avalanche detached in the northeast facing slope of Polvartinden, a high-alpine mountain in Signaldalen, northern Norway. Here, we report on the observed and modelled past and present near-surface temperature regime close to the failure zone, as well as on a subsequent simulation of the subsurface temperature regime, and on initial geomechanical mapping based on laser scanning. The volume of the rock avalanche was estimated to be approximately 500 000m3. The depth to the actual failure surface was found to range from 40m at the back of the failure zone to 0m at its toe. Visible in situ ice was observed in the failure zone just after the rock avalanche. Between September 2009 and August 2013, ground surface temperatures were measured with miniature temperature data loggers at 14 different localities, close to the original failure zone along the northern ridge of Polvartinden and on the valley floor. The results from these measurements and from a basic three-dimensional heat conduction model suggest that the lower altitudinal limit of permafrost at present is at 600-650ma.s.l., which corresponds to the upper limit of the failure zone. A coupling of our in situ data with regional climate data since 1958 suggests a general gradual warming and that the period with highest mean near surface temperatures on record ended four months before the Signaldalen rock avalanche detached. A comparison with a transient permafrost model run at 10m depth, representative for areas where snow accumulates, strengthen these findings, which are also in congruence with measurements in nearby permafrost boreholes. It is likely that permafrost in and near the failure zone is presently subject to degradation. This degradation, in combination with the extreme warm year antecedent to the rock failure, is seen to have played an important role in the detaching of the Signaldalen rock avalanche. [ABSTRACT FROM AUTHOR]
Published: 2018
Full Text: View/download PDF

22. Thermal regime in steep permafrost rockwalls (Aiguille du Midi, 3842 m a.s.l., Mont Blanc massif) based on borehole data and 2D numerical modelling

Author: Magnin, Florence, Deline, Philip, Ravanel, Ludovic, Noetzli, Jeannette, Environnements, Dynamiques et Territoires de la Montagne (EDYTEM), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Glaciology, Geomorphodynamics and Geochronology, Department of Geography [Zürich], and Universität Zürich [Zürich] = University of Zurich (UZH)-Universität Zürich [Zürich] = University of Zurich (UZH)
Abstract: Since permafrost in steep rockwalls is mainly climatically controlled, the ongoing climate warming potentially strongly impacts frequency and magnitude of rockfalls in high-alpine rock faces in the near future. However, knowledge about the role of permafrost is still limited. This is especially because of measurement difficulties (invisibility of permafrost, remoteness and harshness in high mountain areas). In addition to local measurements, numerical models have thus been used in the past years to better understand the distribution and thermal conditions of permafrost and to investigate involved physical processes. To monitor permafrost in steep bedrock and to provide input and validation data for modeling, three 10-m- boreholes have been drilled in 2009 on the NW, NE and S faces of the Aiguille du Midi (AdM 3842 m a.s.l), a granitic peak in the Mont Blanc massif (France). Here, we study the thermal regimes at depth and heat diffusivity. Climatic parameters such as air temperature, wind speed and direction, incoming and outgoing solar radiations are also collected continuously by an automatic weather station. In this contribution, we present the first two years of data from the boreholes, in comparison with climatic parameters and outputs from a basic conductive 2D model. We gain a qualitative understanding of the processes governing the thermal regime of the central pillar of the Aiguille du Midi: (i) the importance of short-wave solar radiations on the most exposed rock faces, and air temperature control on other aspects, (ii) the impact of the snow cover, and (iii) the role of fractures on heat diffusivity and thermal regimes. 2010 and 2011 were respectively the coldest (mean annual air temperature: -9.1 C) and the warmest (-6.7 C) years since 2007 at the AdM. Solar radiations forcing is highlighted by fast thermal response of rockwalls experienced through the variation of the maximum Active Layer Thickness (ALT) from one year to another. In the SE face directly exposed to radiations, ALT was 2.7 m thicker in 2011 than in 2010. In contrast, in the shaded NW face, the ALT only increased by 0.5 m. In a different way, the ALT on the NE side was thinner in 2011, which is likely due to summer snowfalls that occurred just before the air temperature maximum and cooled the face. This cooling effect of snow cover is detectable by comparing the near-surface temperatures from the borehole to temperatures measured at the same exposition but in steeper snow-free parts as well as by model runs. A cooling effect is also related to fractures and associated air ventilation, as displayed by the temperature profile of the NW face, locally distorted and globally cooled. Looking at heat diffusivity from one thermistor to the next reveals its high variability with temperature changes: the values vary by an order of 2.5 between frozen and unfrozen rock
Published: 2012

23. Characteristics of the thermal regime of steep bedrock permafrost in the European Alps described by borehole temperatures and heat conduction modeling

Author: Noetzli, Jeannette, Deline, Philip, Phillips, P., Von Poschinger, A., Glaciology, Geomorphodynamics and Geochronology, Department of Geography [Zürich], Universität Zürich [Zürich] = University of Zurich (UZH)-Universität Zürich [Zürich] = University of Zurich (UZH), Environnements, Dynamiques et Territoires de la Montagne (EDYTEM), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Bavarian State Ministry of the Environment, and Ministry of the Environment and Energy [Stockholm]
Abstract: Permafrost in the Alps occurs within three main landforms - rock glaciers, debris slopes and steep bedrock. In contrast to rock glaciers and debris slopes, permafrost in steep bedrock reacts directly, fast and sensitively to changes in atmospheric conditions and these areas are therefore important for monitoring purposes. In addition, the observation of the state and changes of permafrost in steep bedrock is relevant for the stability and maintenance of infrastructure as well as the assessment and possible change of slope stability in high mountain areas. Mainly due to the difficulties of access, however, mountain permafrost monitoring activities in the Alps have concentrated on rock glaciers and debris slopes in their beginning more than 20 years ago and only started to focus on bedrock permafrost in the past decade. During the past about 5 years a number of new boreholes with depths ranging from 10 to 60 m have been installed in the scope of different research and monitoring projects at high Alpine sites in Switzerland (e.g., Schilthorn, Matterhorn, Gemsstock), Germany (e.g., Zugspitze), and France (e.g., Aiguille du Midi). Several of the boreholes have been drilled across a crest or perpendicular to the surface. In this contribution, we compare the data and discuss the main results gained from the different borehole sites in steep bedrock. Because of the limited observation period, the extreme spatial variability in these areas, and the invisibility of the phenomenon, we combine the point measurements with numerical heat conduction modeling for extrapolation in time and space to allow a more comprehensive interpretation. In addition to the basic characteristics that the temperature regime in bedrock is mainly controlled by conduction and no thick surface cover (such as snow, debris, blocks) or latent heat effects (low ice contents) mask the changes in atmospheric conditions, a number of specifics of permafrost temperatures in steep bedrock can be observed: a) the influence of different climatic conditions on the thermal regime, b) the influence of the surface geometry (steep topography) on the three-dimensional temperature field, b) the accelerating effect of steep topography on the pace at which changes at the surface are propagated into the subsurface (multi-lateral warming), c) the cooling effect of a thin snow cover, which is often present in such terrain, and d) the cooling effect of ventilation in clefts.
Published: 2012

24. Temperature field of the Aiguille du Midi (Mont Blanc Massif) described by rock temperature measurements and modelling

Author: Noetzli, Jeannette, Deline, Philip, Ravanel, Ludovic, Glaciology, Geomorphodynamics and Geochronology, Department of Geography [Zürich], Universität Zürich [Zürich] = University of Zurich (UZH)-Universität Zürich [Zürich] = University of Zurich (UZH), Environnements, Dynamiques et Territoires de la Montagne (EDYTEM), and Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)
Published: 2011

25. The first year of borehole measurements in the rock permafrost at Aiguille du Midi (3842 m a.s.l., Mont Blanc massif)

Author: Ravanel, Ludovic, Deline, Philip, Magnin, Florence, Malet, Emmanuel, Noetzli, Jeannette, Environnements, Dynamiques et Territoires de la Montagne (EDYTEM), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Glaciology, Geomorphodynamics and Geochronology, Department of Geography [Zürich], and Universität Zürich [Zürich] = University of Zurich (UZH)-Universität Zürich [Zürich] = University of Zurich (UZH)
Subjects: ComputingMethodologies_GENERAL
Abstract: Poster
Published: 2011

26. Development and perspectives of applied research on glacier and permafrost hazards in high-mountain regions - the example of Switzerland

Author: Haeberli, Wilfried, Huggel, Christian, Kääb, Andreas, Gruber, Stephan, Noetzli, Jeannette, Zgraggen-Oswald, S, University of Zurich, and Schweizerische Direktion für Entwicklung und Zusammenarbeit
Subjects: 10122 Institute of Geography, 910 Geography & travel
Published: 2004

27. Semi-automated calibration method for modelling of mountain permafrost evolution in Switzerland.

Author: Marmy, Antoine, Rajczak, Jan, Delaloye, Reynald, Hilbich, Christin, Hoelzle, Martin, Kotlarski, Sven, Lambiel, Christophe, Noetzli, Jeannette, Phillips, Marcia, Salzmann, Nadine, Staub, Benno, and Hauck, Christian
Subjects: PERMAFROST, CLIMATE change, THAWING
Abstract: Permafrost is a widespread phenomenon in mountainous regions of the world such as the European Alps. Many important topics such as the future evolution of permafrost related to climate change and the detection of permafrost related to potential natural hazards sites are of major concern to our society. Numerical permafrost models are the only tools which allow for the projection of the future evolution of permafrost. Due to the complexity of the processes involved and the heterogeneity of Alpine terrain, models must be carefully calibrated, and results should be compared with observations at the site (borehole) scale. However, for large-scale applications, a site-specific model calibration for a multitude of grid points would be very timeconsuming. To tackle this issue, this study presents a semiautomated calibration method using the Generalized Likelihood Uncertainty Estimation (GLUE) as implemented in a 1-D soil model (CoupModel) and applies it to six permafrost sites in the Swiss Alps. We show that this semiautomated calibration method is able to accurately reproduce the main thermal condition characteristics with some limitations at sites with unique conditions such as 3-D air or water circulation, which have to be calibrated manually. The calibration obtained was used for global and regional climate model (GCM/RCM)-based long-term climate projections under the A1B climate scenario (EU-ENSEMBLES project) specifically downscaled at each borehole site. The projection shows general permafrost degradation with thawing at 10 m, even partially reaching 20m depth by the end of the century, but with different timing among the sites and with partly considerable uncertainties due to the spread of the applied climatic forcing. [ABSTRACT FROM AUTHOR]
Published: 2016
Full Text: View/download PDF

28. The December 2008 Crammont Rock Avalanche, Mont Blanc Massif Area, Italy.

Author: Deline, Philip, Broccolato, Massimo, Noetzli, Jeannette, Ravanel, Ludovic, and Tamburini, Andrea
Published: 2013
Full Text: View/download PDF

29. Mountain permafrost: development and challenges of a young research field.

Author: HAEBERLI, Wilfried, NOETZLI, Jeannette, ARENSON, Lukas, DELALOYE, Reynald, GÄRTNER-ROER, Isabelle, GRUBER, Stephan, ISAKSEN, Ketil, KNEISEL, Christof, KRAUTBLATTER, Michael, and PHILLIPS, Marcia
Subjects: PERMAFROST, FROZEN ground, MOUNTAINS, SURFACE energy, MICROCLIMATOLOGY, GEOGRAPHY
Abstract: The article provides an overview on the development in the study of permafrost in cold mountain regions, including the state of knowledge and future challenges. A brief history is given which cites the Proceedings of the International Permafrost Conferences in the late 1970s to have started the papers about permafrost in mid-latitude/high-altitude mountain regions. Its occurrence and distribution patterns are discussed with emphasis on the effects of various factors like complex topography, surface energy fluxes, and microclimatic conditions.
Published: 2010
Full Text: View/download PDF

30. Three-dimensional distribution and evolution of permafrost temperatures in idealized high-mountain topography.

Author: Noetzli, Jeannette, Gruber, Stephan, Kohl, Thomas, Salzmann, Nadine, and Haeberli, Wilfried
Published: 2007
Full Text: View/download PDF

31. Permafrost in Switzerland 2008/2009 and 2009/2010

Author: University of Zurich and Noetzli, Jeannette
Subjects: 10122 Institute of Geography, 910 Geography & travel
Published: 2013

Catalog

Books, media, physical & digital resources

See catalog results

Searchworks

Select search scope, currently: Articles

Catalog

books, media & more in Jio Institute collections

Articles

journal articles & other e-resources

Refine your results

31 results on '"Noetzli, Jeannette"'

1. Response of alpine ground temperatures to a rising atmospheric 0 °C isotherm in the period 1955–2021

2. The changing thermal state of permafrost

3. Permafrost is warming at a global scale

4. Global Climate:STATE OF THE CLIMATE IN 2021

5. Measurement Recommendations and Guidelines for the Global Terrestrial Network for Permafrost (GTN-P)

6. In situ observations of the Swiss periglacial environment using GNSS instruments

7. Best Practice for Measuring Permafrost Temperature in Boreholes Based on the Experience in the Swiss Alps

8. Global Climate [in 'State of the Climate in 2019']

9. GIS-based modelling of rock-ice avalanches from Alpine permafrost areas

10. Long-term energy balance measurements at three different mountain permafrost sites in the Swiss Alps.

11. State of the Climate in 2018

12. State of the climate in 2017

13. Kinematic observations of the mountain cryosphere using in-situ GNSS instruments.

14. Gap‐filling algorithm for ground surface temperature data measured in permafrost and periglacial environments

15. State of the Climate in 2014

16. Permafrost

17. Distinguishing ice-rich and ice-poor permafrost to map ground temperatures and ground ice occurrence in the Swiss Alps.

18. A comparative user evaluation of six alternative permafrost visualizations for reading and interpreting temperature information

19. State of the Climate in 2012

20. Ice thawing, mountains falling - are alpine rock slope failures increasing?

21. Ground thermal and geomechanical conditions in a permafrost-affected high-latitude rock avalanche site (Polvartinden, northern Norway).

22. Thermal regime in steep permafrost rockwalls (Aiguille du Midi, 3842 m a.s.l., Mont Blanc massif) based on borehole data and 2D numerical modelling

23. Characteristics of the thermal regime of steep bedrock permafrost in the European Alps described by borehole temperatures and heat conduction modeling

24. Temperature field of the Aiguille du Midi (Mont Blanc Massif) described by rock temperature measurements and modelling

25. The first year of borehole measurements in the rock permafrost at Aiguille du Midi (3842 m a.s.l., Mont Blanc massif)

26. Development and perspectives of applied research on glacier and permafrost hazards in high-mountain regions - the example of Switzerland

27. Semi-automated calibration method for modelling of mountain permafrost evolution in Switzerland.

28. The December 2008 Crammont Rock Avalanche, Mont Blanc Massif Area, Italy.

29. Mountain permafrost: development and challenges of a young research field.

30. Three-dimensional distribution and evolution of permafrost temperatures in idealized high-mountain topography.

31. Permafrost in Switzerland 2008/2009 and 2009/2010

Catalog

Searchworks

Select search scope, currently: Articles Catalog books, media & more in Jio Institute collections Articles journal articles & other e-resources

Search

Search Constraints

Refine your results

Search Limiters

Topic

Publication Year Range

Publication Type

Journal

Region

Database

Publisher

31 results on '"Noetzli, Jeannette"'

Search Results

Catalog

Select search scope, currently: Articles

Catalog

books, media & more in Jio Institute collections

Articles

journal articles & other e-resources