18 results on '"Killick, Rachel E."'
Number of results to display per page
Search Results
2. Indicators of Global Climate Change 2023: annual update of key indicators of the state of the climate system and human influence
- Author
-
Forster, Piers M., primary, Smith, Chris, additional, Walsh, Tristram, additional, Lamb, William F., additional, Lamboll, Robin, additional, Hall, Bradley, additional, Hauser, Mathias, additional, Ribes, Aurélien, additional, Rosen, Debbie, additional, Gillett, Nathan P., additional, Palmer, Matthew D., additional, Rogelj, Joeri, additional, von Schuckmann, Karina, additional, Trewin, Blair, additional, Allen, Myles, additional, Andrew, Robbie, additional, Betts, Richard A., additional, Borger, Alex, additional, Boyer, Tim, additional, Broersma, Jiddu A., additional, Buontempo, Carlo, additional, Burgess, Samantha, additional, Cagnazzo, Chiara, additional, Cheng, Lijing, additional, Friedlingstein, Pierre, additional, Gettelman, Andrew, additional, Gütschow, Johannes, additional, Ishii, Masayoshi, additional, Jenkins, Stuart, additional, Lan, Xin, additional, Morice, Colin, additional, Mühle, Jens, additional, Kadow, Christopher, additional, Kennedy, John, additional, Killick, Rachel E., additional, Krummel, Paul B., additional, Minx, Jan C., additional, Myhre, Gunnar, additional, Naik, Vaishali, additional, Peters, Glen P., additional, Pirani, Anna, additional, Pongratz, Julia, additional, Schleussner, Carl-Friedrich, additional, Seneviratne, Sonia I., additional, Szopa, Sophie, additional, Thorne, Peter, additional, Kovilakam, Mahesh V. M., additional, Majamäki, Elisa, additional, Jalkanen, Jukka-Pekka, additional, van Marle, Margreet, additional, Hoesly, Rachel M., additional, Rohde, Robert, additional, Schumacher, Dominik, additional, van der Werf, Guido, additional, Vose, Russell, additional, Zickfeld, Kirsten, additional, Zhang, Xuebin, additional, Masson-Delmotte, Valérie, additional, and Zhai, Panmao, additional
- Published
- 2024
- Full Text
- View/download PDF
3. Global Daily Surface Air Temperatures from EUSTACE
- Author
-
Rayner, Nick A., Auchmann, Renate, Bessembinder, Janette, Brönnimann, Stefan, Brugnara, Yuri, Capponi, Francesco, Carrea, Laura, Dodd, Emma M. A., Ghent, Darren, Good, Elizabeth, Høyer, Jacob L., Kennedy, John J., Kent, Elizabeth C., Killick, Rachel E., van der Linden, Paul, Lindgren, Finn, Madsen, Kristine S., Merchant, Christopher J., Mitchelson, Joel R., Morice, Colin P., Nielsen-Englyst, Pia, Ortiz, Patricio F., Remedios, John J., van der Schrier, Gerard, Squintu, Antonello A., Stephens, Ag, Thorne, Peter W., Tonboe, Rasmus T., Trent, Tim, Veal, Karen L., Waterfall, Alison M., Winfield, Kate, Winn, Jonathan, and Woolway, R. Iestyn
- Published
- 2020
4. The EUSTACE Project : Delivering Global, Daily Information on Surface Air Temperature
- Author
-
Rayner, Nick A., Auchmann, Renate, Bessembinder, Janette, Brönnimann, Stefan, Brugnara, Yuri, Capponi, Francesco, Carrea, Laura, Dodd, Emma M. A., Ghent, Darren, Good, Elizabeth, Høyer, Jacob L., Kennedy, John J., Kent, Elizabeth C., Killick, Rachel E., van der Linden, Paul, Lindgren, Finn, Madsen, Kristine S., Merchant, Christopher J., Mitchelson, Joel R., Morice, Colin P., Nielsen-Englyst, Pia, Ortiz, Patricio F., Remedios, John J., van der Schrier, Gerard, Squintu, Antonello A., Stephens, Ag, Thorne, Peter W., Tonboe, Rasmus T., Trent, Tim, Veal, Karen L., Waterfall, Alison M., Winfield, Kate, Winn, Jonathan, and Woolway, R. Iestyn
- Published
- 2020
5. Historical Ocean Heat Uptake in Two Pairs of CMIP6 Models: Global and Regional Perspectives
- Author
-
Kuhlbrodt, Till, Voldoire, Aurore, Palmer, Matthew D., Geoffroy, Olivier, Killick, Rachel E., Centre national de recherches météorologiques (CNRM), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)
- Subjects
Ocean heat uptake ,Atmospheric Science ,Radiative forcing ,General circulation models ,[SDE]Environmental Sciences ,Climate change ,Climate models ,Anthropogenic effects/forcing - Abstract
Ocean heat content (OHC) is one of the most relevant metrics tracking the current global heating. Therefore, simulated OHC time series are a cornerstone for assessing the scientific performance of Earth system models and global climate models. Here we present a detailed analysis of OHC change in simulations of the historical climate (1850–2014) performed with two pairs of CMIP6 models: U.K. Earth System Model 1 (UKESM1.0) and HadGEM3-GC3.1-LL, and CNRM-ESM2-1 and CNRM-CM6-1. The small number of models enables us to analyze OHC change globally and for individual ocean basins, making use of a novel ensemble of observational products. For the top 700 m of the global ocean, the two CNRM models reproduce the observed OHC change since the 1960s closely. The two U.K. models (UKESM1.0-LL and HadGEM3-GC3.1-LL) compensate a lack of warming in the 0–700 m layer in the 1970s and 1980s with warming below 2000 m. The observed warming between 700 and 2000 m is substantially underestimated by all models. An increased relevance for ocean heat uptake in the Atlantic after 1991—suggested by observations—is picked up by the U.K. models but less so by the CNRM models, probably related to an AMOC strengthening in the U.K. models. The regional ocean heat uptake characteristics differ even though all four models share the same ocean component (NEMO ORCA1). Differences in the simulated global, full-depth OHC time series can be attributed to differences in the model’s total effective radiative forcing.
- Published
- 2023
6. Global Oceans, BAMS State of the Climate in 2021, Chapter 3
- Author
-
Johnson, Gregory C., Lumpkin, Rick, Boyer, Tim, Bringas, Francis, Cetinić, Ivona, Chambers, Don P., Cheng, Lijing, Dong, Shenfu, Feely, Richard A., Fox-Kemper, Baylor, Frajka-Williams, Eleanor, Franz, Bryan A., Fu, Yao, Gao, Meng, Garg, Jay, Gilson, John, Goni, Gustavo, Hamlington, Benjamin D., Hewitt, Helene T., Hobbs, William R., Hu, Zeng-Zhen, Huang, Boyin, Jevrejeva, Svetlana, Johns, William E., Katsunari, Sato, Kennedy, John J., Kersalé, Marion, Killick, Rachel E., Leuliette, Eric, Locarnini, Ricardo, Lozier, M. Susan, Lyman, John M., Merrifield, Mark A., Mishonov, Alexey, Mitchum, Gary T., Moat, Ben I., Nerem, R. Steven, Notz, Dirk, Perez, Renellys C., Purkey, Sarah G., Rayner, Darren, Reagan, James, Schmid, Claudia, Siegel, David A., Smeed, David A., Stackhouse, Paul W., Sweet, William, Thompson, Philip R., Volkov, Denis L., Wanninkhof, Rik, Weller, Robert A., Wen, Caihong, Westberry, Toby K., Widlansky, Matthew J., Willis, Josh K., Yu, Lisan, and Zhang, Huai-Min
- Abstract
Patterns of variability in ocean properties are often closely related to large-scale climate pattern indices, and 2021 is no exception. The year 2021 started and ended with La Niña conditions, charmingly dubbed a “double-dip” La Niña. Hence, stronger-than-normal easterly trade winds in the tropical south Pacific drove westward surface current anomalies in the equatorial Pacific; reduced sea surface temperature (SST) and upper ocean heat content in the eastern tropical Pacific; increased sea level, upper ocean heat content, and salinity in the western tropical Pacific; resulted in a rim of anomalously high chlorophyll-a (Chla) on the poleward and westward edges of the anomalously cold SST wedge in the eastern equatorial Pacific; and increased precipitation over the Maritime Continent. The Pacific decadal oscillation remained strongly in a negative phase in 2021, with negative SST and upper ocean heat content anomalies around the eastern and equatorial edges of the North Pacific and positive anomalies in the center associated with low Chla anomalies. The South Pacific exhibited similar patterns. Fresh anomalies in the northeastern Pacific shifted towards the west coast of North America. The Indian Ocean dipole (IOD) was weakly negative in 2021, with small positive SST anomalies in the east and nearly-average anomalies in the west. Nonetheless, upper ocean heat content was anomalously high in the west and lower in the east, with anomalously high freshwater flux and low sea surface salinities (SSS) in the east, and the opposite pattern in the west, as might be expected during a negative phase of that climate index. In the Atlantic, the only substantial cold anomaly in SST and upper ocean heat content persisted east of Greenland in 2021, where SSS was also low, all despite the weak winds and strong surface heat flux anomalies into the ocean expected during a negative phase of the North Atlantic Oscillation. These anomalies held throughout much of 2021. An Atlantic and Benguela Niño were both evident, with above-average SST anomalies in the eastern equatorial Atlantic and the west coast of southern Africa. Over much of the rest of the Atlantic, SSTs, upper ocean heat content, and sea level anomalies were above average. Anthropogenic climate change involves long-term trends, as this year’s chapter sidebars emphasize. The sidebars relate some of the latest IPCC ocean-related assessments (including carbon, the section on which is taking a hiatus from our report this year). This chapter estimates that SST increased at a rate of 0.16–0.19°C decade−1 from 2000 to 2021, 0–2000-m ocean heat content warmed by 0.57–0.73 W m−2 (applied over Earth’s surface area) from 1993 to 2021, and global mean sea level increased at a rate of 3.4 ± 0.4 mm yr−1 from 1993 to 2021. Global mean SST, which is more subject to interannual variations than ocean heat content and sea level, with values typically reduced during La Niña, was ~0.1°C lower in 2021 than in 2020. However, from 2020 to 2021, annual average ocean heat content from 0 to 2000 dbar increased at a rate of ~0.95 W m−2, and global sea level increased by ~4.9 mm. Both were the highest on record in 2021, and with year-on-year increases substantially exceeding their trend rates of recent decades.
- Published
- 2022
- Full Text
- View/download PDF
7. Improved Infilling of Missing Metadata from Expendable Bathythermographs (XBTs) Using Multiple Machine Learning Methods
- Author
-
Haddad, Stephen, primary, Killick, Rachel E., additional, Palmer, Matthew D., additional, Webb, Mark J., additional, Prudden, Rachel, additional, Capponi, Francesco, additional, and Adams, Samantha V., additional
- Published
- 2022
- Full Text
- View/download PDF
8. Global Oceans
- Author
-
Johnson, Gregory C., primary, Lumpkin, Rick, additional, Boyer, Tim, additional, Bringas, Francis, additional, Cetinić, Ivona, additional, Chambers, Don P., additional, Cheng, Lijing, additional, Dong, Shenfu, additional, Feely, Richard A., additional, Fox-Kemper, Baylor, additional, Frajka-Williams, Eleanor, additional, Franz, Bryan A., additional, Fu, Yao, additional, Gao, Meng, additional, Garg, Jay, additional, Gilson, John, additional, Goni, Gustavo, additional, Hamlington, Benjamin D., additional, Hewitt, Helene T., additional, Hobbs, William R., additional, Hu, Zeng-Zhen, additional, Huang, Boyin, additional, Jevrejeva, Svetlana, additional, Johns, William E., additional, Katsunari, Sato, additional, Kennedy, John J., additional, Kersalé, Marion, additional, Killick, Rachel E., additional, Leuliette, Eric, additional, Locarnini, Ricardo, additional, Lozier, M. Susan, additional, Lyman, John M., additional, Merrifield, Mark A., additional, Mishonov, Alexey, additional, Mitchum, Gary T., additional, Moat, Ben I., additional, Nerem, R. Steven, additional, Notz, Dirk, additional, Perez, Renellys C., additional, Purkey, Sarah G., additional, Rayner, Darren, additional, Reagan, James, additional, Schmid, Claudia, additional, Siegel, David A., additional, Smeed, David A., additional, Stackhouse, Paul W., additional, Sweet, William, additional, Thompson, Philip R., additional, Volkov, Denis L., additional, Wanninkhof, Rik, additional, Weller, Robert A., additional, Wen, Caihong, additional, Westberry, Toby K., additional, Widlansky, Matthew J., additional, Willis, Josh K., additional, Yu, Lisan, additional, and Zhang, Huai-Min, additional
- Published
- 2022
- Full Text
- View/download PDF
9. Benchmarking the performance of homogenization algorithms on synthetic daily temperature data
- Author
-
Killick, Rachel E., primary, Jolliffe, Ian T., additional, and Willett, Kate M., additional
- Published
- 2021
- Full Text
- View/download PDF
10. Global Oceans
- Author
-
Johnson, Gregory C., primary, Lumpkin, Rick, additional, Alin, Simone R., additional, Amaya, Dillon J., additional, Baringer, Molly O., additional, Boyer, Tim, additional, Brandt, Peter, additional, Carter, Brendan R., additional, Cetinić, Ivona, additional, Chambers, Don P., additional, Cheng, Lijing, additional, Collins, Andrew U., additional, Cosca, Cathy, additional, Domingues, Ricardo, additional, Dong, Shenfu, additional, Feely, Richard A., additional, Frajka-Williams, Eleanor, additional, Franz, Bryan A., additional, Gilson, John, additional, Goni, Gustavo, additional, Hamlington, Benjamin D., additional, Herrford, Josefine, additional, Hu, Zeng-Zhen, additional, Huang, Boyin, additional, Ishii, Masayoshi, additional, Jevrejeva, Svetlana, additional, Kennedy, John J., additional, Kersalé, Marion, additional, Killick, Rachel E., additional, Landschützer, Peter, additional, Lankhorst, Matthias, additional, Leuliette, Eric, additional, Locarnini, Ricardo, additional, Lyman, John M., additional, Marra, John J., additional, Meinen, Christopher S., additional, Merrifield, Mark A., additional, Mitchum, Gary T., additional, Moat, Ben I., additional, Nerem, R. Steven, additional, Perez, Renellys C., additional, Purkey, Sarah G., additional, Reagan, James, additional, Sanchez-Franks, Alejandra, additional, Scannell, Hillary A., additional, Schmid, Claudia, additional, Scott, Joel P., additional, Siegel, David A., additional, Smeed, David A., additional, Stackhouse, Paul W., additional, Sweet, William, additional, Thompson, Philip R., additional, Triñanes, Joaquin A., additional, Volkov, Denis L., additional, Wanninkhof, Rik, additional, Weller, Robert A., additional, Wen, Caihong, additional, Westberry, Toby K., additional, Widlansky, Matthew J., additional, Wilber, Anne C., additional, Yu, Lisan, additional, and Zhang, Huai-Min, additional
- Published
- 2021
- Full Text
- View/download PDF
11. International Quality-Controlled Ocean Database (IQuOD) v0.1: The Temperature Uncertainty Specification
- Author
-
Cowley, Rebecca, primary, Killick, Rachel E., additional, Boyer, Tim, additional, Gouretski, Viktor, additional, Reseghetti, Franco, additional, Kizu, Shoichi, additional, Palmer, Matthew D., additional, Cheng, Lijing, additional, Storto, Andrea, additional, Le Menn, Marc, additional, Simoncelli, Simona, additional, Macdonald, Alison M., additional, and Domingues, Catia M., additional
- Published
- 2021
- Full Text
- View/download PDF
12. Benchmarking the performance of homogenization algorithms on synthetic daily temperature data.
- Author
-
Killick, Rachel E., Jolliffe, Ian T., and Willett, Kate M.
- Subjects
- *
ALGORITHMS , *TIME series analysis , *TEMPERATURE , *ASYMPTOTIC homogenization , *SURFACE waves (Seismic waves) - Abstract
This paper describes a new homogenization algorithm validation methodology, and its use to assess the skill of eight different algorithms, when applied to synthetic daily temperature time series. These algorithms were ACMANT, Climatol (in both daily and monthly configurations), DAP, HOM, MAC‐D, MASH and SpliDHOM. Algorithms were tested on benchmark data replicating daily temperature variability in four regions in North America: Wyoming, the South East, the North East and the South West. These benchmarks contained plausible spatial and temporal correlation, differing station densities and both abrupt and gradual inhomogeneities. Algorithm ability was assessed both according to detection of inhomogeneities and correction of their effects, investigating bias, root‐mean‐square error (RMSE), linear trend recovery, station extremes and variability recovery. Inhomogeneities with a magnitude greater than 1°C were those most commonly detected with smaller inhomogeneities, and those that were not constant over time, proving harder to identify. Regional RMSE was always reduced by all algorithms and regional bias was reduced in over half of the region/scenario pairs. Trend recovery was variable, but the correct sign of regional trends was retained by all algorithms. Areas for future algorithm improvement include working with autocorrelated data and correcting moments higher than the mean. The data are available from https://www.metoffice.gov.uk/hadobs/benchmarks and the validation code from https://github.com/RachelKillick/Daily%5fbenchmarks allowing the extension of this work and its application to new algorithms. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
13. Global and regional climate in 2019
- Author
-
Kennedy, John J., primary, Kendon, Mike, additional, Killick, Rachel E., additional, Dunn, Robert J. H., additional, Allan, Rob J., additional, Rayner, Nick A., additional, and McCarthy, Mark, additional
- Published
- 2020
- Full Text
- View/download PDF
14. Global Oceans
- Author
-
Baringer, Molly, additional, Bif, Mariana B., additional, Boyer, Tim, additional, Bushinsky, Seth M., additional, Carter, Brendan R., additional, Cetinić, Ivona, additional, Chambers, Don P., additional, Cheng, Lijing, additional, Chiba, Sanai, additional, Dai, Minhan, additional, Domingues, Catia M., additional, Dong, Shenfu, additional, Fassbender, Andrea J., additional, Feely, Richard A., additional, Frajka-Williams, Eleanor, additional, Franz, Bryan A., additional, Gilson, John, additional, Goni, Gustavo, additional, Hamlington, Benjamin D., additional, Hu, Zeng-Zhen, additional, Huang, Boyin, additional, Ishii, Masayoshi, additional, Jevrejeva, Svetlana, additional, Johns, William E., additional, Johnson, Gregory C., additional, Johnson, Kenneth S., additional, Kennedy, John, additional, Kersalé, Marion, additional, Killick, Rachel E., additional, Landschützer, Peter, additional, Lankhorst, Matthias, additional, Lee, Tong, additional, Leuliette, Eric, additional, Li, Feili, additional, Lindstrom, Eric, additional, Locarnini, Ricardo, additional, Lozier, Susan, additional, Lyman, John M., additional, Marra, John J., additional, Meinen, Christopher S., additional, Merrifield, Mark A., additional, Mitchum, Gary T., additional, Moat, Ben, additional, Monselesan, Didier, additional, Nerem, R. Steven, additional, Perez, Renellys C., additional, Purkey, Sarah G., additional, Rayner, Darren, additional, Reagan, James, additional, Rome, Nicholas, additional, Sanchez-Franks, Alejandra, additional, Schmid, Claudia, additional, Scott, Joel P., additional, Send, Uwe, additional, Siegel, David A., additional, Smeed, David A., additional, Speich, Sabrina, additional, Stackhouse, Paul W., additional, Sweet, William, additional, Takeshita, Yuichiro, additional, Thompson, Philip R., additional, Triñanes, Joaquin A., additional, Visbeck, Martin, additional, Volkov, Denis L., additional, Wanninkhof, Rik, additional, Weller, Robert A., additional, Westberry, Toby K., additional, Widlansky, Matthew J., additional, Wijffels, Susan E., additional, Wilber, Anne C., additional, Yu, Lisan, additional, Yu, Weidong, additional, and Zhang, Huai-Min, additional
- Published
- 2020
- Full Text
- View/download PDF
15. Global and regional climate in 2018
- Author
-
Kennedy, John J., primary, Killick, Rachel E., additional, Dunn, Robert J., additional, McCarthy, Mark P., additional, Morice, Colin P., additional, Rayner, Nick A., additional, and Titchner, Holly A., additional
- Published
- 2019
- Full Text
- View/download PDF
16. Measuring Global Ocean Heat Content to Estimate the Earth Energy Imbalance
- Author
-
Meyssignac, Benoit, primary, Boyer, Tim, additional, Zhao, Zhongxiang, additional, Hakuba, Maria Z., additional, Landerer, Felix W., additional, Stammer, Detlef, additional, Köhl, Armin, additional, Kato, Seiji, additional, L’Ecuyer, Tristan, additional, Ablain, Michael, additional, Abraham, John Patrick, additional, Blazquez, Alejandro, additional, Cazenave, Anny, additional, Church, John A., additional, Cowley, Rebecca, additional, Cheng, Lijing, additional, Domingues, Catia M., additional, Giglio, Donata, additional, Gouretski, Viktor, additional, Ishii, Masayoshi, additional, Johnson, Gregory C., additional, Killick, Rachel E., additional, Legler, David, additional, Llovel, William, additional, Lyman, John, additional, Palmer, Matthew Dudley, additional, Piotrowicz, Steve, additional, Purkey, Sarah G., additional, Roemmich, Dean, additional, Roca, Rémy, additional, Savita, Abhishek, additional, Schuckmann, Karina von, additional, Speich, Sabrina, additional, Stephens, Graeme, additional, Wang, Gongjie, additional, Wijffels, Susan Elisabeth, additional, and Zilberman, Nathalie, additional
- Published
- 2019
- Full Text
- View/download PDF
17. Global and regional climate in 2017
- Author
-
Kennedy, John J., primary, Dunn, Robert J. H., additional, Titchner, Holly A., additional, Morice, Colin P., additional, Killick, Rachel E., additional, and McCarthy, Mark P., additional
- Published
- 2018
- Full Text
- View/download PDF
18. Use of generalized additive modelling techniques to create synthetic daily temperature networks for benchmarking homogenization algorithms
- Author
-
Killick, Rachel E, primary, Jolliffe, Ian T, additional, and Willett, Kate M, additional
- Published
- 2018
- Full Text
- View/download PDF
Catalog
Books, media, physical & digital resources
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.