Meteorological atmospheric boundary layer measurements and ECMWF analyses during summer at Dome C, Antarctica
International audience Six levels of meteorological sensors have been deployed along a 45 m tower at the French-Italian Concordia station, Dome C, Antarctic. We present measurements of vertical profiles, the diurnal cycle, and interdiurnal variability of temperature, humidity, and wind speed and dir...
Published in: | Journal of Geophysical Research |
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Main Authors: | , , , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2010
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Online Access: | https://hal.science/hal-00561263 https://hal.science/hal-00561263/document https://hal.science/hal-00561263/file/2009JD012741.pdf https://doi.org/10.1029/2009JD012741 |
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openpolar |
institution |
Open Polar |
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Institut national des sciences de l'Univers: HAL-INSU |
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ftinsu |
language |
English |
topic |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
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[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Genthon, Christophe Town, Michael S. Six, Delphine Favier, Vincent Argentini, Stefania Pellegrini, Andrea Meteorological atmospheric boundary layer measurements and ECMWF analyses during summer at Dome C, Antarctica |
topic_facet |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience Six levels of meteorological sensors have been deployed along a 45 m tower at the French-Italian Concordia station, Dome C, Antarctic. We present measurements of vertical profiles, the diurnal cycle, and interdiurnal variability of temperature, humidity, and wind speed and direction for 3 weeks during the southern summer of 2008. These measurements are compared to 6-hourly European Center for Medium-Range Forecasts (ECMWF) analyses and daily radiosoundings. The ECMWF analyses show a 3-4°C warm bias relative to the tower observations. They reproduce the diurnal cycle of temperature with slightly weaker amplitude and weaker vertical gradients. The amplitude of the diurnal cycle of relative humidity is overestimated by ECMWF because the amplitude of the absolute humidity diurnal cycle is too small. The nighttime surface-based wind shear and Ekman spiral is also not reproduced in the ECMWF analyses. Radiosonde temperatures are biased low relative to the tower observations in the lowest 30 m but approach agreement at the top of the tower. Prior to bias correction for age-related contamination, radiosonde relative humidities are biased low relative to the tower observations in the lowest 10 m but agree with tower observations above this height. After correction for the age-related bias, the radiosonde relative humidity agrees with tower observations below 10 m but is biased high above this height. Tower temperature observations may also be biased by solar heating, despite radiation shielding and natural ventilation. |
author2 |
CLIPS Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) CHYC |
format |
Article in Journal/Newspaper |
author |
Genthon, Christophe Town, Michael S. Six, Delphine Favier, Vincent Argentini, Stefania Pellegrini, Andrea |
author_facet |
Genthon, Christophe Town, Michael S. Six, Delphine Favier, Vincent Argentini, Stefania Pellegrini, Andrea |
author_sort |
Genthon, Christophe |
title |
Meteorological atmospheric boundary layer measurements and ECMWF analyses during summer at Dome C, Antarctica |
title_short |
Meteorological atmospheric boundary layer measurements and ECMWF analyses during summer at Dome C, Antarctica |
title_full |
Meteorological atmospheric boundary layer measurements and ECMWF analyses during summer at Dome C, Antarctica |
title_fullStr |
Meteorological atmospheric boundary layer measurements and ECMWF analyses during summer at Dome C, Antarctica |
title_full_unstemmed |
Meteorological atmospheric boundary layer measurements and ECMWF analyses during summer at Dome C, Antarctica |
title_sort |
meteorological atmospheric boundary layer measurements and ecmwf analyses during summer at dome c, antarctica |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.science/hal-00561263 https://hal.science/hal-00561263/document https://hal.science/hal-00561263/file/2009JD012741.pdf https://doi.org/10.1029/2009JD012741 |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
ISSN: 0148-0227 EISSN: 2156-2202 Journal of Geophysical Research https://hal.science/hal-00561263 Journal of Geophysical Research, 2010, 115, pp.05104. ⟨10.1029/2009JD012741⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2009JD012741 hal-00561263 https://hal.science/hal-00561263 https://hal.science/hal-00561263/document https://hal.science/hal-00561263/file/2009JD012741.pdf BIBCODE: 2010JGRD.11505104G doi:10.1029/2009JD012741 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2009JD012741 |
container_title |
Journal of Geophysical Research |
container_volume |
115 |
container_issue |
D5 |
_version_ |
1797568938380361728 |
spelling |
ftinsu:oai:HAL:hal-00561263v1 2024-04-28T07:58:20+00:00 Meteorological atmospheric boundary layer measurements and ECMWF analyses during summer at Dome C, Antarctica Genthon, Christophe Town, Michael S. Six, Delphine Favier, Vincent Argentini, Stefania Pellegrini, Andrea CLIPS Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) CHYC 2010-03 https://hal.science/hal-00561263 https://hal.science/hal-00561263/document https://hal.science/hal-00561263/file/2009JD012741.pdf https://doi.org/10.1029/2009JD012741 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2009JD012741 hal-00561263 https://hal.science/hal-00561263 https://hal.science/hal-00561263/document https://hal.science/hal-00561263/file/2009JD012741.pdf BIBCODE: 2010JGRD.11505104G doi:10.1029/2009JD012741 info:eu-repo/semantics/OpenAccess ISSN: 0148-0227 EISSN: 2156-2202 Journal of Geophysical Research https://hal.science/hal-00561263 Journal of Geophysical Research, 2010, 115, pp.05104. ⟨10.1029/2009JD012741⟩ [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2010 ftinsu https://doi.org/10.1029/2009JD012741 2024-04-05T00:38:11Z International audience Six levels of meteorological sensors have been deployed along a 45 m tower at the French-Italian Concordia station, Dome C, Antarctic. We present measurements of vertical profiles, the diurnal cycle, and interdiurnal variability of temperature, humidity, and wind speed and direction for 3 weeks during the southern summer of 2008. These measurements are compared to 6-hourly European Center for Medium-Range Forecasts (ECMWF) analyses and daily radiosoundings. The ECMWF analyses show a 3-4°C warm bias relative to the tower observations. They reproduce the diurnal cycle of temperature with slightly weaker amplitude and weaker vertical gradients. The amplitude of the diurnal cycle of relative humidity is overestimated by ECMWF because the amplitude of the absolute humidity diurnal cycle is too small. The nighttime surface-based wind shear and Ekman spiral is also not reproduced in the ECMWF analyses. Radiosonde temperatures are biased low relative to the tower observations in the lowest 30 m but approach agreement at the top of the tower. Prior to bias correction for age-related contamination, radiosonde relative humidities are biased low relative to the tower observations in the lowest 10 m but agree with tower observations above this height. After correction for the age-related bias, the radiosonde relative humidity agrees with tower observations below 10 m but is biased high above this height. Tower temperature observations may also be biased by solar heating, despite radiation shielding and natural ventilation. Article in Journal/Newspaper Antarc* Antarctic Antarctica Institut national des sciences de l'Univers: HAL-INSU Journal of Geophysical Research 115 D5 |