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16 results on '"Lindenberg Meteorological Observatory - Richard Assmann Observatory (MOL-RAO)"'

1. Two-year operation of the lidar 1200: from fine-scale tropospheric structures to lower stratospheric water vapor detection

Author

Françoise Posny, Franck Gabarrot, Guillaume Payen, Valentin Duflot, Jimmy Leclair de Bellevue, Holger Vömel, Nicolas Marquestaut, Philippe Keckhut, Jean-Marc Metzger, Hélène Vérèmes, Susanne Meier, Jean-Luc Baray, Jean-Pierre Cammas, Stephanie Evan, Ruud Dirksen, Observatoire des Sciences de l'Univers de La Réunion (OSU-Réunion), Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR), Laboratoire de l'Atmosphère et des Cyclones (LACy), Centre National de la Recherche Scientifique (CNRS)-Université de La Réunion (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Météo France, STRATO - 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), Laboratoire de Météorologie Physique (LaMP), Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Lindenberg Meteorological Observatory - Richard Assmann Observatory (MOL-RAO), Deutscher Wetterdienst [Offenbach] (DWD), Earth Observing Laboratory [Boulder] (EOL), National Center for Atmospheric Research [Boulder] (NCAR)-University Corporation for Atmospheric Research (UCAR), Observatoire des Sciences de l'Univers de La Réunion ( OSU-Réunion ), Institut national des sciences de l'Univers ( INSU - CNRS ) -Université de la Réunion ( UR ), Laboratoire de l'Atmosphère et des Cyclones ( LACy ), Météo France-Université de la Réunion ( UR ) -Centre National de la Recherche Scientifique ( CNRS ), SHTI - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales ( LATMOS ), Université de Versailles Saint-Quentin-en-Yvelines ( UVSQ ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Versailles Saint-Quentin-en-Yvelines ( UVSQ ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire de Météorologie Physique - Clermont Auvergne ( LaMP ), Institut national des sciences de l'Univers ( INSU - CNRS ) -Université Clermont Auvergne ( UCA ) -Centre National de la Recherche Scientifique ( CNRS ), Lindenberg Meteorological Observatory - Richard Assmann Observatory ( MOL-RAO ), Deutscher Wetterdienst [Offenbach] ( DWD ), Earth Observing Laboratory [Boulder] ( EOL ), National Center for Atmospheric Research [Boulder] ( NCAR ) -University Corporation for Atmospheric Research ( UCAR ), Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS)-Météo-France, 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), and Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Time delay and integration, [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, 010504 meteorology & atmospheric sciences, Meteorology, Hygrometer, QC1-999, 0211 other engineering and technologies, 02 engineering and technology, [SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology, Atmospheric sciences, 01 natural sciences, Troposphere, Lidar, [ PHYS.PHYS.PHYS-AO-PH ] Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], 13. Climate action, Observatory, Scale (map), Stratosphere, Water vapor, 021101 geological & geomatics engineering, 0105 earth and related environmental sciences
Abstract

International audience; The 2-year lidar water vapor database (November 2013 - October 2015) of the Maïdo Observatory (Reunion Island / 21°S,55.5°E) is now calibrated. The performance of the lidar to provide accurate vertical structures are shown to be good. The ability of measuring quantities of a few ppmv in the lower stratosphere is demonstrated up to 22 km (based on Cryogenic Frostpoint Hygrometer sondes/lidar profiles comparisons) for an integration time period of 48 hours and a vertical resolution of 1.3 km.

Published
2018
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2. Unprecedented Observations of a Nascent In Situ Cirrus in the Tropical Tropopause Layer

Author

Eric J. Jensen, Françoise Posny, Jerome Brioude, Jean-Marc Metzger, I. Reinares Martinez, Holger Vömel, Stephanie Evan, Susanne Körner, Frank G. Wienhold, Damien Héron, Bert Verreyken, Troy Thornberry, Laboratoire de l'Atmosphère et des Cyclones (LACy), Institut national des sciences de l'Univers (INSU - CNRS)-Météo France-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS), Institute for Atmospheric and Climate Science [Zürich] (IAC), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), National Center for Atmospheric Research [Boulder] (NCAR), NOAA Earth System Research Laboratory (ESRL), National Oceanic and Atmospheric Administration (NOAA), Lindenberg Meteorological Observatory - Richard Assmann Observatory (MOL-RAO), Deutscher Wetterdienst [Offenbach] (DWD), Observatoire des Sciences de l'Univers de La Réunion (OSU-Réunion), Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR), ANR-17-CE01-0005,CONCIRTO,Influence de la convection et des cirrus sur la Haute-Troposphère/Basse-Stratosphère au dessus de l'Océan Indien(2017), Centre National de la Recherche Scientifique (CNRS)-Université de La Réunion (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Météo France, NASA Ames Research Center (ARC), Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado [Boulder]-National Oceanic and Atmospheric Administration (NOAA), Royal Belgian Institute for Space Aeronomy, Universiteit Gent = Ghent University [Belgium] (UGENT), and Université de La Réunion (UR)-Institut national des sciences de l'Univers (INSU - CNRS)

Subjects
010504 meteorology & atmospheric sciences, Backscatter, cirrus, Atmospheric sciences, 01 natural sciences, 010309 optics, 0103 physical sciences, Gravity wave, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences, [PHYS]Physics [physics], [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, Hygrometer, Ice crystals, modeling, Radius, Aerosol, gravity wave, Geophysics, COBALD observation, 13. Climate action, [SDU]Sciences of the Universe [physics], Earth and Environmental Sciences, [SDE]Environmental Sciences, General Earth and Planetary Sciences, Cirrus, Tropopause, Geology, tropical tropopause layer
Abstract

International audience; A nascent in situ cirrus was observed on January 11, 2019 in the tropical tropopause layer (TTL) over the southwestern Indian Ocean, with the use of balloon-borne instruments. Data from cryogenic frost point hygrometer (CFH) and Compact Optical Backscatter and AerosoL Detector (COBALD) instruments were used to characterize the cirrus and its environment. Optical modeling was employed to estimate the cirrus microphysical properties from the COBALD backscatter measurements. Newly fomed ice crystals with radius

Published
2021
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3. Validation of the Water Vapor Profiles of the Raman Lidar at the Maïdo Observatory (Reunion Island) Calibrated with Global Navigation Satellite System Integrated Water Vapor

Author

Vérèmes, Hélène, Payen, Guillaume, Keckhut, Philippe, Duflot, Valentin, Baray, Jean-Luc, Cammas, Jean-Pierre, Evan, Stéphanie, Posny, Françoise, Körner, Susanne, Bosser, Pierre, Laboratoire de l'Atmosphère et des Cyclones (LACy), Centre National de la Recherche Scientifique (CNRS)-Université de La Réunion (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Météo France, Observatoire des Sciences de l'Univers de La Réunion (OSU-Réunion), Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR), STRATO - 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), Laboratoire de Météorologie Physique (LaMP), Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Lindenberg Meteorological Observatory - Richard Assmann Observatory (MOL-RAO), Deutscher Wetterdienst [Offenbach] (DWD), Lab-STICC_ENSTAB_CID_PRASYS, Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance (Lab-STICC), Institut Mines-Télécom [Paris] (IMT)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-École Nationale d'Ingénieurs de Brest (ENIB)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL)-Institut Mines-Télécom [Paris] (IMT)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-École Nationale d'Ingénieurs de Brest (ENIB)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL), Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS)-Météo-France, 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), Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL)-IMT Atlantique (IMT Atlantique), and Institut Mines-Télécom [Paris] (IMT)

Subjects
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], gnss iwv, maïdo observatory, water vapor, reunion island, raman lidar, lcsh:Meteorology. Climatology, lcsh:QC851-999, calibration
Abstract

The Ma&iuml, do high-altitude observatory located in Reunion Island (21 ∘ S, 55.5 ∘ E) is equipped with the Lidar1200, an innovative Raman lidar designed to measure the water vapor mixing ratio in the troposphere and the lower stratosphere, to perform long-term survey and processes studies in the vicinity of the tropopause. The calibration methodology is based on a GNSS (Global Navigation Satellite System) IWV (Integrated Water Vapor) dataset. The lidar water vapor measurements from November 2013 to October 2015 have been calibrated according to this methodology and used to evaluate the performance of the lidar. The 2-year operation shows that the calibration uncertainty using the GNSS technique is in good agreement with the calibration derived using radiosondes. During the MORGANE (Ma&iuml, do ObservatoRy Gaz and Aerosols NDACC Experiment) campaign (Reunion Island, May 2015), CFH (Cryogenic Frost point Hygrometer) radiosonde and Raman lidar profiles are compared and show good agreement up to 22 km asl, no significant biases are detected and mean differences are smaller than 9% up to 22 km asl.

Published
2019
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4. Humidity of the tropical lower stratosphere: Observations and analysis

Author

A. Lukyanov, L. Korshunov, Vladimir Yushkov, Sergey Khaykin, Jean-Pierre Pommereau, Johannes K. Nielsen, Holger Vömel, Central Aerological Observatory (CAO), Russian Federal Service for Hydrometeorology and Environmental Monitoring (Roshydromet), STRATO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Danish Meteorological Institute (DMI), Lindenberg Meteorological Observatory - Richard Assmann Observatory (MOL-RAO), and Deutscher Wetterdienst [Offenbach] (DWD)

Subjects
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], Atmospheric Science, 010504 meteorology & atmospheric sciences, Hygrometer, Humidity, Oceanography, Atmospheric sciences, 01 natural sciences, 010309 optics, Troposphere, 13. Climate action, Climatology, Brightness temperature, 0103 physical sciences, Environmental science, Potential temperature, Tropopause, Stratosphere, Water vapor, 0105 earth and related environmental sciences
Abstract

International audience; The results of measurements of water-vapor vertical profiles in the upper troposphere and stratosphere on board a meteorological balloon with a FLASH-B optical fluorescent hygrometer (Russia) are presented. These data were obtained during two international field campaigns in West Africa (August 2006) and Central America (August 2007). Eleven high-resolution water-vapor vertical profiles measured in the course of these works make it possible to characterize the processes controlling humidity in the tropical tropopause region. Layers with increased humidity are detected in the lower stratosphere over West Africa to the level of the potential temperature 450 K. An analysis of satellite maps of the brightness temperature, balloon ozone measurements, and aerosol scattering, as well as trajectory modeling, display the relation between the observed layers with increased humidity and the phenomena of convective overshooting of the tropopause, as a result of which cold and ozone-depleted air penetrates into the lower stratosphere together with ice particles, which, rapidly sublimating, locally increase the water-vapor concentration. A comparison of the humidity data obtained in West Africa in 2006 and in Central America in 2007 reveals substantial distinctions in values and vertical structures of water vapor, both in the tropopause region and in the middle stratosphere.

Published
2010
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5. Tropospheric ozone from IASI : comparison of different inversion algorithms and validation with ozone sondes in the northern middle latitudes

Author

David J. Moore, K. Lambkin, Rigel Kivi, M. López Bartolomé, Gaëlle Dufour, Maxim Eremenko, C. Keim, Takashi Koide, Anne Boynard, Michael Höpfner, Sébastien Payan, Hans Claude, Johannes Orphal, René Stübi, P.-F. Coheur, H. Dier, J. M. Flaud, F. J. Schmidlin, Cathy Clerbaux, Beverly J. Johnson, H. Kelder, Daniel Hurtmans, Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Institute for Meteorology and Climate Research (IMK), Karlsruhe Institute of Technology (KIT), TROPO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Moleculaire pour l'Atmosphere et l'Astrophysique (LPMAA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Spectroscopie de l'atmosphère, Service de Chimie Quantique et Photophysique, Université libre de Bruxelles (ULB), Meteorological Observatory Hohenpeissenberg (MOHp), Lindenberg Meteorological Observatory - Richard Assmann Observatory (MOL-RAO), Deutscher Wetterdienst [Offenbach] (DWD), NOAA Earth System Research Laboratory (ESRL), National Oceanic and Atmospheric Administration (NOAA), Department of Applied Physics [Eindhoven], Eindhoven University of Technology [Eindhoven] (TU/e), Finnish Meteorological Institute (FMI), Japan Meteorological Agency (JMA), Agencia Estatal de Meteorología (AEMet), Irish Meteorological Service, United Kingdom Met Office [Exeter], NASA Goddard Space Flight Center (GSFC), Federal Office of Meteorology and Climatology MeteoSwiss, Fluids and Flows, Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Institut für Meteorologie und Klimaforschung (IMK), Karlsruher Institut für Technologie (KIT), and Université Libre de Bruxelles [Bruxelles] (ULB)

Subjects
Atmospheric Science, Ozone, 010504 meteorology & atmospheric sciences, Meteorology, Infrared Atmospheric Sounding Interferometer, Infrared atmospheric sounding interferometer, Atmospheric sciences, Tropospheric ozone, 01 natural sciences, law.invention, lcsh:Chemistry, 010309 optics, Troposphere, chemistry.chemical_compound, Orbiter, law, 0103 physical sciences, IASI satellite instrument, Interferómetro Espacial Infrarrojo, 0105 earth and related environmental sciences, [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], Inversion algorithms, Algoritmos, Dobson unit, Ozono troposférico, Inversion (meteorology), lcsh:QC1-999, lcsh:QD1-999, chemistry, 13. Climate action, Middle latitudes, Environmental science, Algorithm, lcsh:Physics
Abstract

This paper presents a first statistical validation of tropospheric ozone products derived from measurements of the IASI satellite instrument. Since the end of 2006, IASI (Infrared Atmospheric Sounding Interferometer) aboard the polar orbiter Metop-A measures infrared spectra of the Earth's atmosphere in nadir geometry. This validation covers the northern mid-latitudes and the period from July 2007 to August 2008. Retrieval results from four different sources are presented: three are from scientific products (LATMOS, LISA, LPMAA) and the fourth one is the pre-operational product distributed by EUMETSAT (version 4.2). The different products are derived from different algorithms with different approaches. The difference and their implications for the retrieved products are discussed. In order to evaluate the quality and the performance of each product, comparisons with the vertical ozone concentration profiles measured by balloon sondes are performed and lead to estimates of the systematic and random errors in the IASI ozone products (profiles and partial columns). A first comparison is performed on the given profiles; a second comparison takes into account the altitude dependent sensitivity of the retrievals. Tropospheric columnar amounts are compared to the sonde for a lower tropospheric column (surface to about 6 km) and a "total" tropospheric column (surface to about 11 km). On average both tropospheric columns have small biases for the scientific products, less than 2 Dobson Units (DU) for the lower troposphere and less than 1 DU for the total troposphere. The comparison of the still pre-operational EUMETSAT columns shows higher mean differences of about 5 DU.

Published
2009
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6. Arctic stratospheric dehydration - Part 2: Microphysical modeling

Author

Jens-Uwe Grooß, Thomas Peter, Holger Vömel, Rigel Kivi, Christopher R. Hoyle, Frank G. Wienhold, Michael C. Pitts, B. P. Luo, I. Engel, Sergey Khaykin, Institute for Atmospheric and Climate Science [Zürich] (IAC), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), Central Aerological Observatory (CAO), Russian Federal Service for Hydrometeorology and Environmental Monitoring (Roshydromet), STRATO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Lindenberg Meteorological Observatory - Richard Assmann Observatory (MOL-RAO), Deutscher Wetterdienst [Offenbach] (DWD), Finnish Meteorological Institute (FMI), Laboratory of Atmospheric Chemistry [Paul Scherrer Institute] (LAC), Paul Scherrer Institute (PSI), Institut für Energie- und Klimaforschung - Stratosphäre (IEK-7), Forschungszentrum Jülich GmbH | Centre de recherche de Juliers, Helmholtz-Gemeinschaft = Helmholtz Association-Helmholtz-Gemeinschaft = Helmholtz Association, and NASA Langley Research Center [Hampton] (LaRC)

Subjects
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], Atmospheric Science, 010504 meteorology & atmospheric sciences, Nucleation, Atmospheric sciences, 01 natural sciences, 7. Clean energy, lcsh:QC1-999, lcsh:Chemistry, 010309 optics, Arctic, lcsh:QD1-999, 13. Climate action, Wind shear, Climatology, Ozone layer, 0103 physical sciences, Ice nucleus, ddc:550, Polar, Environmental science, Stratosphere, Water vapor, lcsh:Physics, 0105 earth and related environmental sciences
Abstract

Large areas of synoptic-scale ice PSCs (polar stratospheric clouds) distinguished the Arctic winter 2009/2010 from other years and revealed unprecedented evidence of water redistribution in the stratosphere. A unique snapshot of water vapor repartitioning into ice particles was obtained under extremely cold Arctic conditions with temperatures around 183 K. Balloon-borne, aircraft and satellite-based measurements suggest that synoptic-scale ice PSCs and concurrent reductions and enhancements in water vapor are tightly linked with the observed de- and rehydration signatures, respectively. In a companion paper (Part 1), water vapor and aerosol backscatter measurements from the RECONCILE (Reconciliation of essential process parameters for an enhanced predictability of Arctic stratospheric ozone loss and its climate interactions) and LAPBIAT-II (Lapland Atmosphere–Biosphere Facility) field campaigns have been analyzed in detail. This paper uses a column version of the Zurich Optical and Microphysical box Model (ZOMM) including newly developed NAT (nitric acid trihydrate) and ice nucleation parameterizations. Particle sedimentation is calculated in order to simulate the vertical redistribution of chemical species such as water and nitric acid. Despite limitations given by wind shear and uncertainties in the initial water vapor profile, the column modeling unequivocally shows that (1) accounting for small-scale temperature fluctuations along the trajectories is essential in order to reach agreement between simulated optical cloud properties and observations, and (2) the use of recently developed heterogeneous ice nucleation parameterizations allows the reproduction of the observed signatures of de- and rehydration. Conversely, the vertical redistribution of water measured cannot be explained in terms of homogeneous nucleation of ice clouds, whose particle radii remain too small to cause significant dehydration.

Published
2014
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7. Arctic stratospheric dehydration - Part 1: Unprecedented observation of vertical redistribution of water

Author

Michael C. Pitts, Ivan Formanyuk, Rigel Kivi, Vladimir Yushkov, Michelle L. Santee, Alexey Lykov, Thomas Peter, Sergey Khaykin, Martina Krämer, I. Engel, T. Naebert, Frank G. Wienhold, L. Korshunov, Holger Vömel, Nicole Spelten, Susanne Meier, Central Aerological Observatory (CAO), Russian Federal Service for Hydrometeorology and Environmental Monitoring (Roshydromet), STRATO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institute for Atmospheric and Climate Science [Zürich] (IAC), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), Lindenberg Meteorological Observatory - Richard Assmann Observatory (MOL-RAO), Deutscher Wetterdienst [Offenbach] (DWD), Finnish Meteorological Institute (FMI), Institut für Energie- und Klimaforschung - Stratosphäre (IEK-7), Forschungszentrum Jülich GmbH | Centre de recherche de Juliers, Helmholtz-Gemeinschaft = Helmholtz Association-Helmholtz-Gemeinschaft = Helmholtz Association, NASA Langley Research Center [Hampton] (LaRC), Jet Propulsion Laboratory (JPL), and NASA-California Institute of Technology (CALTECH)

Subjects
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], Atmospheric Science, Hygrometer, 010504 meteorology & atmospheric sciences, Atmospheric sciences, 010502 geochemistry & geophysics, 01 natural sciences, lcsh:QC1-999, Aerosol, lcsh:Chemistry, 010309 optics, Microwave Limb Sounder, Lidar, lcsh:QD1-999, Arctic, 13. Climate action, 0103 physical sciences, Ozone layer, ddc:550, Environmental science, Stratosphere, lcsh:Physics, Water vapor, 0105 earth and related environmental sciences
Abstract

We present high-resolution measurements of water vapour, aerosols and clouds in the Arctic stratosphere in January and February 2010 carried out by in situ instrumentation on balloon sondes and high-altitude aircraft combined with satellite observations. The measurements provide unparalleled evidence of dehydration and rehydration due to gravitational settling of ice particles. An extreme cooling of the Arctic stratospheric vortex during the second half of January 2010 resulted in a rare synoptic-scale outbreak of ice polar stratospheric clouds (PSCs) remotely detected by the lidar aboard the CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation) satellite. The widespread occurrence of ice clouds was followed by sedimentation and consequent sublimation of ice particles, leading to vertical redistribution of water inside the vortex. A sequence of balloon and aircraft soundings with chilled mirror and Lyman- α hygrometers (Cryogenic Frostpoint Hygrometer, CFH; Fast In Situ Stratospheric Hygrometer, FISH; Fluorescent Airborne Stratospheric Hygrometer, FLASH) and backscatter sondes (Compact Optical Backscatter Aerosol Detector, COBALD) conducted in January 2010 within the LAPBIAT (Lapland Atmosphere-Biosphere Facility) and RECONCILE (Reconciliation of Essential Process Parameters for an Enhanced Predictability of Arctic Stratospheric Ozone Loss and its Climate Interactions) campaigns captured various phases of this phenomenon: ice formation, irreversible dehydration and rehydration. Consistent observations of water vapour by these independent measurement techniques show clear signatures of irreversible dehydration of the vortex air by up to 1.6 ppmv in the 20–24 km altitude range and rehydration by up to 0.9 ppmv in a 1 km thick layer below. Comparison with space-borne Aura MLS (Microwave Limb Sounder) water vapour observations allow the spatiotemporal evolution of dehydrated air masses within the Arctic vortex to be derived and upscaled.

Published
2013
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8. A Raman lidar at La Reunion (20.8° S, 55.5° E) for monitoring water vapor and cirrus distributions in the subtropical upper troposphere: preliminary analyses and description of a future system

Author

Jean-Luc Baray, Jacques Porteneuve, Philippe Keckhut, Béatrice Morel, Holger Vömel, Laurent Robert, Christophe Hoareau, Yann Courcoux, STRATO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Atmosphère et des Cyclones (LACy), Centre National de la Recherche Scientifique (CNRS)-Université de La Réunion (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Météo France, Observatoire des Sciences de l'Univers de La Réunion (OSU-Réunion), Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Lindenberg Meteorological Observatory - Richard Assmann Observatory (MOL-RAO), Deutscher Wetterdienst [Offenbach] (DWD), Laboratoire d'Energétique, d'Electronique et Procédés (LE2P), Université de La Réunion (UR), Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS)-Météo-France, and Energy Lab (ENERGY Lab)

Subjects
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], Atmospheric Science, 010504 meteorology & atmospheric sciences, Meteorology, lcsh:TA715-787, lcsh:Earthwork. Foundations, [SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology, 01 natural sciences, lcsh:Environmental engineering, 010309 optics, Troposphere, Altitude, Lidar, 13. Climate action, Observatory, Diurnal cycle, 0103 physical sciences, Calibration, Environmental science, Cirrus, lcsh:TA170-171, Water vapor, 0105 earth and related environmental sciences, Remote sensing
Abstract

A ground based Rayleigh lidar has provided continuous observations of tropospheric water vapor profiles and cirrus cloud using a preliminary Raman channels setup on an existing Rayleigh lidar above La Reunion over the period 2002–2005. With this instrument, we performed a first measurement campaign of 350 independent water vapor profiles. A statistical study of the distribution of water vapor profiles is presented and some investigations concerning the calibration are discussed. The data set having several long acquisition measurements during nighttime, an analysis of the diurnal cycle of water vapor has also been investigated. Analysis regarding the cirrus clouds is presented and a classification has been performed showing 3 distinct classes. Based on these results, the characteristics and the design of a future lidar system to be implemented at the new Reunion Island altitude observatory (2200 m) for long-term monitoring is presented and numerical simulations of system performance have been realized to compare both instruments.

Published
2012
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9. Corrigendum to 'Tropospheric ozone from IASI: comparison of different inversion algorithms and validation with ozone sondes in the northern middle latitudes' published in Atmos. Chem. Phys., 9, 9329-9347, doi:10.5194/acp-9-9329-2009, 2009

Author

C. Keim, M. Eremenko, J. Orphal, G. Dufour, J.-M. Flaud, M. Höpfner, A. Boynard, C. Clerbaux, S. Payan, P.-F. Coheur, D. Hurtmans, H. Claude, H. De Backer, H. Dier, B. Johnson, H. Kelder, R. Kivi, T. Koide, M. López Bartolomé, K. Lambkin, D. Moore, F. J. Schmidlin, R. Stübi, Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Institute for Meteorology and Climate Research (IMK), Karlsruhe Institute of Technology (KIT), TROPO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Moleculaire pour l'Atmosphere et l'Astrophysique (LPMAA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Spectroscopie de l'atmosphère, Service de Chimie Quantique et Photophysique, Université libre de Bruxelles (ULB), Meteorologisches Observatorium Hohenpeißenberg (MOHp), Deutscher Wetterdienst [Offenbach] (DWD), Institut Royal Météorologique de Belgique [Bruxelles] - Royal Meteorological Institute (IRM), Lindenberg Meteorological Observatory - Richard Assmann Observatory (MOL-RAO), NOAA Earth System Research Laboratory (ESRL), National Oceanic and Atmospheric Administration (NOAA), Department of Applied Physics [Eindhoven], Eindhoven University of Technology [Eindhoven] (TU/e), Finnish Meteorological Institute (FMI), Japan Meteorological Agency (JMA), Agencia Estatal de Meteorología (AEMet), Irish Meteorological Service (MET ÉIREANN), United Kingdom Met Office [Exeter], NASA Goddard Space Flight Center (GSFC), and Federal Office of Meteorology and Climatology MeteoSwiss

Subjects
lcsh:Chemistry, lcsh:QD1-999, [SDU]Sciences of the Universe [physics], lcsh:Physics, lcsh:QC1-999
Abstract

International audience; No abstract available.

Published
2010
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10. Assessment of Cloudsat Reflectivity Measurements and Ice Cloud Properties Using Ground-Based and Airborne Cloud Radar Observations

Author

Artemio Plana-Fattori, A. Hasson, Ewan O'Connor, Dominique Bouniol, Peter T. May, Alain Protat, Andrew J. Heymsfield, U. Görsdorf, Julien Delanoë, Centre for Australian Weather and Climate Research (CAWCR), SPACE - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Centre national de recherches météorologiques (CNRM), Météo France-Centre National de la Recherche Scientifique (CNRS), Department of Meteorology [Reading], University of Reading (UOR), Centre d'étude des environnements terrestre et planétaires (CETP), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Lindenberg Meteorological Observatory - Richard Assmann Observatory (MOL-RAO), Deutscher Wetterdienst [Offenbach] (DWD), National Center for Atmospheric Research [Boulder] (NCAR), U.S. Department of Energy Atmospheric Radiation Measurement Program (ARM) Centre National d’Etudes Spatiales (CNES)], 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), 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), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), and Institut national des sciences de l'Univers (INSU - CNRS)-Météo France-Centre National de la Recherche Scientifique (CNRS)

Subjects
Atmospheric Science, Cloud radar, 010504 meteorology & atmospheric sciences, Backscatter, Meteorology, 0211 other engineering and technologies, Ocean Engineering, Cloud computing, 02 engineering and technology, [SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology, 01 natural sciences, Physics::Geophysics, Cloud base, Astrophysics::Galaxy Astrophysics, Physics::Atmospheric and Oceanic Physics, 021101 geological & geomatics engineering, 0105 earth and related environmental sciences, Remote sensing, Ice cloud, Ice crystals, business.industry, Cloud top, Reflectivity, 13. Climate action, Environmental science, business
Abstract

A quantitative assessment of Cloudsat reflectivities and basic ice cloud properties (cloud base, top, and thickness) is conducted in the present study from both airborne and ground-based observations. Airborne observations allow direct comparisons on a limited number of ocean backscatter and cloud samples, whereas the ground-based observations allow statistical comparisons on much longer time series but with some additional assumptions. Direct comparisons of the ocean backscatter and ice cloud reflectivities measured by an airborne cloud radar and Cloudsat during two field experiments indicate that, on average, Cloudsat measures ocean backscatter 0.4 dB higher and ice cloud reflectivities 1 dB higher than the airborne cloud radar. Five ground-based sites have also been used for a statistical evaluation of the Cloudsat reflectivities and basic cloud properties. From these comparisons, it is found that the weighted-mean difference ZCloudsat − ZGround ranges from −0.4 to +0.3 dB when a ±1-h time lag around the Cloudsat overpass is considered. Given the fact that the airborne and ground-based radar calibration accuracy is about 1 dB, it is concluded that the reflectivities of the spaceborne, airborne, and ground-based radars agree within the expected calibration uncertainties of the airborne and ground-based radars. This result shows that the Cloudsat radar does achieve the claimed sensitivity of around −29 dBZ. Finally, an evaluation of the tropical “convective ice” profiles measured by Cloudsat has been carried out over the tropical site in Darwin, Australia. It is shown that these profiles can be used statistically down to approximately 9-km height (or 4 km above the melting layer) without attenuation and multiple scattering corrections over Darwin. It is difficult to estimate if this result is applicable to all types of deep convective storms in the tropics. However, this first study suggests that the Cloudsat profiles in convective ice need to be corrected for attenuation by supercooled liquid water and ice aggregates/graupel particles and multiple scattering prior to their quantitative use.

Published
2009
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11. Correlation between equatorial Kelvin waves and the occurrence of extremely thin ice clouds at the tropical tropopause

Author

Markus Rex, Gé Verver, Otto Schrems, Masatomo Fujiwara, Franz Immler, Kirstin Krüger, Lindenberg Meteorological Observatory - Richard Assmann Observatory (MOL-RAO), Deutscher Wetterdienst [Offenbach] (DWD), Leibniz-Institut für Meereswissenschaften (IFM-GEOMAR), Hokkaido University [Sapporo, Japan], Royal Netherlands Meteorological Institute (KNMI), Department of Bentho-pelagic processes, Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI), and EGU, Publication

Subjects
0106 biological sciences, Atmospheric Science, 010504 meteorology & atmospheric sciences, 010502 geochemistry & geophysics, Atmospheric sciences, 01 natural sciences, law.invention, Atmosphere, lcsh:Chemistry, symbols.namesake, law, 0105 earth and related environmental sciences, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, [SDU.OCEAN] Sciences of the Universe [physics]/Ocean, Atmosphere, lcsh:QC1-999, Lidar, lcsh:QD1-999, 13. Climate action, Temporal resolution, Climatology, symbols, Radiosonde, Cirrus, Tropopause, Kelvin wave, Geology, Water vapor, lcsh:Physics, 010606 plant biology & botany
Abstract

A number of field-campaigns in the tropics have been conducted in the recent years with two different LIDAR systems at Paramaribo in Suriname (5.8° N, 55.2° W). The lidars detect particles in the atmosphere with high vertical and temporal resolution and are capable of detecting extremely thin cloud layers which frequently occur in the tropical tropopause layer (TTL). Radiosonde as well as operational ECMWF analysis show that temperature anomalies caused by equatorial Kelvin waves propagate downward, well below the cold point tropopause (CPT). We find a clear correlation between the temperature anomalies introduced by these waves and the occurrence of thin cirrus in the TTL. In particular we found that extremely thin ice clouds form regularly where cold anomalies shift the tropopause to high altitudes. This finding suggests an influence of Kelvin wave activity on the dehydration in the TTL and thus on the global stratospheric water vapour concentration.

Published
2008

12. A trajectory-based estimate of the tropospheric ozone column using the residual method

Author

Hennie Kelder, S. Chandra, Pieternel F. Levelt, Holger Vömel, E. Joseph, Esko Kyrö, S. J. Oltmans, Valery Dorokhov, Anne M. Thompson, Lucien Froidevaux, David J. Moore, Signe B. Andersen, John T. Merrill, Gérard Ancellet, René Stübi, Susan E. Strahan, P. Viatte, Jonathan Davies, Georg Hansen, Masatomo Fujiwara, B. Bojkov, Nathaniel J. Livesey, P. von der Gathen, Gert J. R. Coetzee, H. De Backer, G. Koenig-Langlo, Bryan N. Duncan, P. Skrivankova, Hans Claude, David W. Tarasick, Pawan K. Bhartia, Greg Bodeker, Gary A. Morris, Sophie Godin-Beekmann, Margarita Yela, Jacquelyn C. Witte, H. Dier, Beverly J. Johnson, Marc Allaart, M. C. Parrondos, Bertrand Calpini, Emilio Cuevas, G. Zablocki, Susan S. Kulawik, Françoise Posny, Mark R. Schoeberl, Michael J. Newchurch, F. J. Schmidlin, Alberto Redondas, C. P. Leong, Jerald R. Ziemke, Valérie Thouret, NASA Goddard Space Flight Center (GSFC), Goddard Earth Sciences and Technology Center (GEST), University of Maryland [Baltimore County] (UMBC), University of Maryland System-University of Maryland System, Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Royal Netherlands Meteorological Institute (KNMI), Science Systems and Applications, Inc. [Lanham] (SSAI), PennState Meteorology Department, Pennsylvania State University (Penn State), Penn State System-Penn State System, Izaña Atmospheric Research Center (IARC), Agencia Estatal de Meteorología (AEMet), Environment Canada (Downsview), National Institute of Water and Atmospheric Research [Lauder] (NIWA), Norwegian Institute for Air Research (NILU), NOAA Earth System Research Laboratory (ESRL), National Oceanic and Atmospheric Administration (NOAA), Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado [Boulder]-National Oceanic and Atmospheric Administration (NOAA), Department of Atmospheric Science [Huntsville], University of Alabama in Huntsville (UAH), Service d'aéronomie (SA), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Meteorologisches Observatorium Hohenpeißenberg (MOHp), Deutscher Wetterdienst [Offenbach] (DWD), Danish Meteorological Institute (DMI), Arctic Research Centre of Finnish Meteorological Institute, Finnish Meteorological Institute (FMI), Laboratorio de Atmosfera [Madrid], Spanish Space Agency, Centre of Aerology [Poland], Institute of Meteorology and Water Management - National Research Institute (IMGW - PIB), United Kingdom Met Office [Exeter], Lindenberg Meteorological Observatory - Richard Assmann Observatory (MOL-RAO), Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI), Payerne Aerological Station, Federal Office of Meteorology and Climatology MeteoSwiss, Czech Hydrometeorological Institute (CHMI), Central Aerological Observatory (CAO), Russian Federal Service for Hydrometeorology and Environmental Monitoring (Roshydromet), Institut Royal Météorologique de Belgique [Bruxelles] - Royal Meteorological Institute (IRM), Department of Environmental Affairs and Tourism, Marine and Coastal Management, South African Government, Graduate School of Environmental Science [Sapporo], Hokkaido University [Sapporo, Japan], Laboratoire d'aérologie (LAERO), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-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)-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), Laboratoire de physique de l'atmosphère (LPA), Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS), Department of Physics and Astronomy [Valparaiso], Valparaiso University, Graduate School of Oceanography [Narragansett], University of Rhode Island (URI), Malaysian Meteorological Department (MetMalaysia), Ministry of Science, Technology and Innovation [Malaysia] (MOSTI), Howard University, Institut Royal Météorologique de Belgique [Bruxelles] (IRM), Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, and Fluids and Flows

Subjects
Atmospheric Science, Residual method, 010504 meteorology & atmospheric sciences, Microwave Limb Sounder, Soil Science, 010501 environmental sciences, Aquatic Science, Oceanography, Atmospheric sciences, 01 natural sciences, Troposphere, chemistry.chemical_compound, Geochemistry and Petrology, Earth and Planetary Sciences (miscellaneous), pollution, Tropospheric ozone, Stratosphere, 0105 earth and related environmental sciences, Earth-Surface Processes, Water Science and Technology, Ozone Monitoring Instrument, tropospheric ozone, [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], Ecology, Paleontology, Forestry, air quality, Geophysics, Tropospheric Emission Spectrometer, chemistry, 13. Climate action, Space and Planetary Science, Climatology, Middle latitudes, Environmental science, Tropospheric column ozone, Tropopause
Abstract

We estimate the tropospheric column ozone using a forward trajectory model to increase the horizontal resolution of the Aura Microwave Limb Sounder (MLS) derived stratospheric column ozone. Subtracting the MLS stratospheric column from Ozone Monitoring Instrument total column measurements gives the trajectory enhanced tropospheric ozone residual (TTOR). Because of different tropopause definitions, we validate the basic residual technique by computing the 200-hPa-to-surface column and comparing it to the same product from ozonesondes and Tropospheric Emission Spectrometer measurements. Comparisons show good agreement in the tropics and reasonable agreement at middle latitudes, but there is a persistent low bias in the TTOR that may be due to a slight high bias in MLS stratospheric column. With the improved stratospheric column resolution, we note a strong correlation of extratropical tropospheric ozone column anomalies with probable troposphere-stratosphere exchange events or folds. The folds can be identified by their colocation with strong horizontal tropopause gradients. TTOR anomalies due to folds may be mistaken for pollution events since folds often occur in the Atlantic and Pacific pollution corridors. We also compare the 200-hPa-to-surface column with Global Modeling Initiative chemical model estimates of the same quantity. While the tropical comparisons are good, we note that chemical model variations in 200-hPa-to-surface column at middle latitudes are much smaller than seen in the TTOR.

Published
2007
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13. Cirrus, contrails, and ice supersaturated regions in high pressure systems at northern mid latitudes

Author

Franz Immler, Kirstin Krüger, Otto Schrems, Renate Treffeisen, D. Engelbart, EGU, Publication, Department of Bentho-pelagic processes, Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI), Richard-Aßmann Observatory, Leibniz-Institut für Meereswissenschaften (IFM-GEOMAR), Lindenberg Meteorological Observatory - Richard Assmann Observatory (MOL-RAO), and Deutscher Wetterdienst [Offenbach] (DWD)

Subjects
Atmospheric Science, 010504 meteorology & atmospheric sciences, 010501 environmental sciences, Atmospheric sciences, 01 natural sciences, law.invention, lcsh:Chemistry, Troposphere, 010309 optics, law, 0103 physical sciences, Optical depth, 0105 earth and related environmental sciences, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, Supersaturation, [SDU.OCEAN] Sciences of the Universe [physics]/Ocean, Atmosphere, Humidity, lcsh:QC1-999, Lidar, lcsh:QD1-999, 13. Climate action, Middle latitudes, Radiosonde, Environmental science, Cirrus, lcsh:Physics
Abstract

During the European heat wave summer 2003 with predominant high pressure conditions we performed a detailed study of upper tropospheric humidity and ice particles which yielded striking results concerning the occurrence of ice supersaturated regions (ISSR), cirrus, and contrails. Our study is based on lidar observations and meteorological data obtained at Lindenberg/Germany (52.2° N, 14.1° E) as well as the analysis of the European centre for medium range weather forecast (ECMWF). Cirrus clouds were detected in 55% of the lidar profiles and a large fraction of them were subvisible (optical depth

Published
2007

14. Arctic winter 2005: Implications for stratospheric ozone loss and climate change

Author

J. Davies, Vladimir Yushkov, A. D. Risley, Z. Litynska, M. Gerding, Karl W. Hoppel, Ross J. Salawitch, Christos Zerefos, Geir O. Braathen, M. C. Parrondo, Hans Claude, P. von der Gathen, David J. Moore, Sophie Godin-Beekmann, Beverly J. Johnson, H. De Backer, P. Skrivankova, H. Dier, Hideaki Nakane, Esko Kyrö, René Stübi, Marc Allaart, H. Fast, Richard M. Bevilacqua, P. Viatte, Valery Dorokhov, Barbara Naujokat, Martyn P. Chipperfield, Signe B. Andersen, Neil R. P. Harris, Markus Rex, E. Reimer, H. Deckelmann, Alfred Wegener Institute for Polar and Marine Research (AWI), Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), European Ozone Research Coordinating Unit [Cambridge] (EORCU), University of Cambridge [UK] (CAM), School of Earth and Environment [Leeds] (SEE), University of Leeds, Institut für Meteorologie [Berlin], Freie Universität Berlin, Royal Netherlands Meteorological Institute (KNMI), Danish Meteorological Institute (DMI), Naval Research Laboratory (NRL), Norwegian Institute for Air Research (NILU), Meteorologisches Observatorium Hohenpeißenberg (MOHp), Deutscher Wetterdienst [Offenbach] (DWD), Meteorological Service of Canada (MSC), Environment and Climate Change Canada, Institut Royal Météorologique de Belgique [Bruxelles] - Royal Meteorological Institute (IRM), Lindenberg Meteorological Observatory - Richard Assmann Observatory (MOL-RAO), Central Aerological Observatory (CAO), Russian Federal Service for Hydrometeorology and Environmental Monitoring (Roshydromet), Leibniz-Institut für Atmosphärenphysik (IAP), Universität Rostock-Leibniz Association, Service d'aéronomie (SA), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), NOAA Earth System Research Laboratory (ESRL), National Oceanic and Atmospheric Administration (NOAA), Sodankylä Geophysical Observatory, University of Oulu, Institute of Meteorology and Water Management - National Research Institute (IMGW - PIB), Met Office Hadley Centre for Climate Change (MOHC), United Kingdom Met Office [Exeter], National Institute for Environmental Studies (NIES), Instituto Nacional de Técnica Aeroespacial (INTA), Science Applications International Corporation (SAIC), Czech Hydrometeorological Institute (CHMI), Payerne Aerological Station, Federal Office of Meteorology and Climatology MeteoSwiss, Laboratory of Climatology and Atmospheric Environment [Athens] (LACAE), and National and Kapodistrian University of Athens (NKUA)

Subjects
Arctic sea ice decline, 010504 meteorology & atmospheric sciences, Polar meteorology, Climate change, 010502 geochemistry & geophysics, Atmospheric sciences, Middle atmosphere, 01 natural sciences, Ozone depletion, Arctic geoengineering, Geophysics, Arctic, [SDU]Sciences of the Universe [physics], 13. Climate action, Polar vortex, Climatology, Ozone layer, General Earth and Planetary Sciences, Environmental science, Stratosphere, 0105 earth and related environmental sciences
Abstract

International audience; The Arctic polar vortex exhibited widespread regions of low temperatures during the winter of 2005, resulting in significant ozone depletion by chlorine and bromine species. We show that chemical loss of column ozone (ΔO3) and the volume of Arctic vortex air cold enough to support the existence of polar stratospheric clouds (VPSC) both exceed levels found for any other Arctic winter during the past 40 years. Cold conditions and ozone loss in the lowermost Arctic stratosphere (e.g., between potential temperatures of 360 to 400 K) were particularly unusual compared to previous years. Measurements indicate ΔO3 = 121 +/- 20 DU and that ΔO3 versus VPSC lies along an extension of the compact, near linear relation observed for previous Arctic winters. The maximum value of VPSC during five to ten year intervals exhibits a steady, monotonic increase over the past four decades, indicating that the coldest Arctic winters have become significantly colder, and hence are more conducive to ozone depletion by anthropogenic halogens.

Published
2006
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15. Validation of Aura Microwave Limb Sounder Ozone by ozonesonde and lidar measurements

Author

David W. Tarasick, Gert J. R. Coetzee, Hans Claude, P. Skrivankova, F. J. Schmidlin, Sophie Godin-Beekmann, Robert Jarnot, G. Zablocki, R. E. Cofield, Françoise Posny, B. Bojkov, I. S. McDermid, P. Viatte, Michael J. Schwartz, Yan Jiang, Greg Bodeker, R. A. Fuller, Lucien Froidevaux, H. Dier, Hennie Kelder, Nathaniel J. Livesey, Beverly J. Johnson, Thierry Leblanc, Giovanni Laneve, S. J. Oltmans, H. De Backer, Brian Knosp, Marc Allaart, M. C. Parrondos, William H. Daffer, René Stübi, Robert S. Harwood, Michael J. Newchurch, Signe B. Andersen, Gary A. Morris, P. C. Stek, William G. Read, Margarita Yela, Bertrand Calpini, Brian J. Drouin, N. P. Leme, Joe W. Waters, W. V. Snyder, Esko Kyrö, D. T. Cuddy, Gert König-Langlo, Anne M. Thompson, R. P. Thurstans, V. S. Perun, P. von der Gathen, Masatomo Fujiwara, P. A. Wagner, L. S. Fook, Alyn Lambert, John T. Merrill, Holger Vömel, Jonathan Davies, M. J. Filipiak, Valérie Thouret, Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), NASA Goddard Space Flight Center (GSFC), Service d'aéronomie (SA), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institute of Atmospheric and Environmental Science [Edinburgh], University of Edinburgh, Royal Netherlands Meteorological Institute (KNMI), Danish Meteorological Institute (DMI), Lauder Atmospheric Research Station, National Institute of Water and Atmospheric Research [Auckland] (NIWA), Payerne Aerological Station, Federal Office of Meteorology and Climatology MeteoSwiss, Meteorologisches Observatorium Hohenpeißenberg (MOHp), Deutscher Wetterdienst [Offenbach] (DWD), South African Weather Service (SAWS), Environment and Climate Change Canada, Institut Royal Météorologique de Belgique [Bruxelles] (IRM), Lindenberg Meteorological Observatory - Richard Assmann Observatory (MOL-RAO), Graduate School of Environmental Science [Sapporo], Hokkaido University [Sapporo, Japan], NOAA Earth System Research Laboratory (ESRL), National Oceanic and Atmospheric Administration (NOAA), Instituto Nacional de Pesquisas Espaciais (INPE), Ministério da Ciência, Tecnologia e Inovação, Finnish Meteorological Institute (FMI), Centro di Ricerca Progetto San Marco (CRPSM), Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome], Malaysian Meteorological Department (MetMalaysia), Ministry of Science, Technology and Innovation [Malaysia] (MOSTI), Graduate School of Oceanography [Narragansett], University of Rhode Island (URI), Department of Physics and Astronomy [Valparaiso], Valparaiso University, Department of Atmospheric Science [Huntsville], University of Alabama in Huntsville (UAH), Instituto Nacional de Técnica Aeroespacial (INTA), Laboratoire de l'Atmosphère et des Cyclones (LACy), Centre National de la Recherche Scientifique (CNRS)-Université de La Réunion (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Météo France, Czech Hydrometeorological Institute (CHMI), PennState Meteorology Department, Pennsylvania State University (Penn State), Penn State System-Penn State System, Laboratoire d'aérologie (LAERO), Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado [Boulder]-National Oceanic and Atmospheric Administration (NOAA), Institute of Meteorology and Water Management - National Research Institute (IMGW - PIB), Institut Royal Météorologique de Belgique [Bruxelles] - Royal Meteorological Institute (IRM), Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome] (UNIROMA), Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS)-Météo-France, Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP), 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 -Institut de Recherche pour le Développement (IRD)-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
Atmospheric Science, 010504 meteorology & atmospheric sciences, ozonesonde, 0211 other engineering and technologies, Soil Science, 02 engineering and technology, Aquatic Science, Oceanography, 01 natural sciences, MLS, Troposphere, chemistry.chemical_compound, Altitude, Geochemistry and Petrology, Ozone layer, Earth and Planetary Sciences (miscellaneous), Tropospheric ozone, Stratosphere, 021101 geological & geomatics engineering, 0105 earth and related environmental sciences, Earth-Surface Processes, Water Science and Technology, validation, [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], Ecology, Paleontology, Forestry, Microwave Limb Sounder, ozone, Geophysics, Lidar, chemistry, 13. Climate action, Space and Planetary Science, Climatology, Middle latitudes, Environmental science, Aura
Abstract

We present validation studies of MLS version 2.2 upper tropospheric and stratospheric ozone profiles using ozonesonde and lidar data as well as climatological data. Ozone measurements from over 60 ozonesonde stations worldwide and three lidar stations are compared with coincident MLS data. The MLS ozone stratospheric data between 150 and 3 hPa agree well with ozonesonde measurements, within 8% for the global average. MLS values at 215 hPa are biased high compared to ozonesondes by A`20% at middle to high latitude, although there is a lot of variability in this altitude region. Comparisons between MLS and ground-based lidar measurements from Mauna Loa, Hawaii, from the Table Mountain Facility, California, and from the Observatoire de Haute-Provence, France, give very good agreement, within A`5%, for the stratospheric values. The comparisons between MLS and the Table Mountain Facility tropospheric ozone lidar show that MLS data are biased high by A`30% at 215 hPa, consistent with that indicated by the ozonesonde data. We obtain better global average agreement between MLS and ozonesonde partial column values down to 215 hPa, although the average MLS values at low to middle latitudes are higher than the ozonesonde values by up to a few percent. MLS v2.2 ozone data agree better than the MLS v1.5 data with ozonesonde and lidar measurements. MLS tropical data show the wave one longitudinal pattern in the upper troposphere, with similarities to the average distribution from ozonesondes. High upper tropospheric ozone values are also observed by MLS in the tropical Pacific from June to November.

Published
2007
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16. Match observations in the Arctic winter 1996/97: High stratospheric ozone loss rates correlate with low temperatures deep inside the polar vortex

Author

Vladimir Yushkov, E. Reimer, Markus Rex, Hiroshi Kanzawa, P. Viatte, J. Cisneros, Christos Zerefos, Neil R. P. Harris, J. Steger, Geir O. Braathen, Efstratios K. Kosmidis, G. Murphy, H. De Backer, R. Alfier, C. Parrondo, H. Fast, C. Vialle, Valery Dorokhov, B. Kois, Hideaki Nakane, Esko Kyrö, Hans Claude, M. Alpers, Georg Hansen, Sophie Godin, H. Dier, M. J. Molyneux, A. Schulz, Fabrizio Ravegnani, Costas A. Varotsos, Z. Litynska, Yutaka Kondo, A. Beck, P. von der Gathen, Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI), European Ozone Research Coordinating Unit [Cambridge] (EORCU), University of Cambridge [UK] (CAM), Norwegian Institute for Air Research (NILU), Institut für Meteorologie [Berlin], Freie Universität Berlin, Leibniz-Institut für Atmosphärenphysik (IAP), Universität Rostock-Leibniz Association, Instituto Nacional de Meteorologia [Madrid] (INM), Meteorologisches Observatorium Hohenpeißenberg (MOHp), Deutscher Wetterdienst [Offenbach] (DWD), Institut Royal Météorologique de Belgique [Bruxelles] (IRM), Lindenberg Meteorological Observatory - Richard Assmann Observatory (MOL-RAO), Central Aerological Observatory (CAO), Russian Federal Service for Hydrometeorology and Environmental Monitoring (Roshydromet), Environment and Climate Change Canada, Service d'aéronomie (SA), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), National Institute for Environmental Studies (NIES), Institute of Meteorology and Water Management - National Research Institute (IMGW - PIB), Nagoya University, Aristotle University of Thessaloniki, Finnish Meteorological Institute (FMI), United Kingdom Met Office [Exeter], Irish Meteorological Service (MET ÉIREANN), Instituto Nacional de Técnica Aeroespacial (INTA), Consiglio Nazionale delle Ricerche [Bologna] (CNR), Academy of Athens, Federal Office of Meteorology and Climatology MeteoSwiss, Laboratory of Atmospheric Physics [Thessaloniki], Institut Royal Météorologique de Belgique [Bruxelles] - Royal Meteorological Institute (IRM), and Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Ozone, 010504 meteorology & atmospheric sciences, Stratospheric ozone, [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], 0211 other engineering and technologies, 02 engineering and technology, Atmospheric sciences, 01 natural sciences, chemistry.chemical_compound, Polar vortex, Ozone layer, Low temperatures, Stratosphere, 021101 geological & geomatics engineering, 0105 earth and related environmental sciences, [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], Global change, Vortex, The arctic, Geophysics, chemistry, 13. Climate action, Climatology, General Earth and Planetary Sciences, Environmental science, Loss rate
Abstract

With the Match technique, which is based on the coordinated release of ozonesondes, chemical ozone loss rates in the Arctic stratospheric vortex in early 1997 have been quantified in a vertical region between 400 K and 550 K. Ozone destruction was observed from mid February to mid March in most of these levels, with maximum loss rates between 25 and 45ppbv/day. The vortex averaged loss rates and the accumulated vertically integrated ozone loss have been smaller than in the previous two winters, indicating that the record low ozone columns observed in spring 1997 were partly caused by dynamical effects. The observed ozone loss is inhomogeneous through the vortex with the highest loss rates located in the vortex centre, coinciding with the lowest temperatures. Here the loss rates per sunlit hour reached 6 ppbv/h, while the corresponding vortex averaged rates did not exceed 3.9 ppbv/h. This work was supported by the Environment and Climate Programme of the Directorate General for Science and Technology (DG-XII) of the European Commission (contract no. ENV4-CT95-0145), the Bundesministeriumff ir Bildung, Wissenschaft, Forschungu nd Technologie(B MBF) of Germany( contract no. 01 LO9508/6) and by all the countrieso f the participating personnel. AWI contribution number: 1549.

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