Modeling the Dynamics of the Atmospheric Boundary Layer Over the Antarctic Plateau With a General Circulation Model
International audience Observations evidence extremely stable boundary layers (SBL) over the Antarctic Plateau and sharp regime transitions between weakly and very stable conditions. Representing such features is a challenge for climate models. This study assesses the modeling of the dynamics of the...
Published in: | Journal of Advances in Modeling Earth Systems |
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Main Authors: | , , , , , , |
Other Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2018
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Subjects: | |
Online Access: | https://hal.sorbonne-universite.fr/hal-01727467 https://hal.sorbonne-universite.fr/hal-01727467v1/document https://hal.sorbonne-universite.fr/hal-01727467v1/file/Vignon_et_al-2018-Journal_of_Advances_in_Modeling_Earth_Systems.pdf https://doi.org/10.1002/2017MS001184 |
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ftecoleponts:oai:HAL:hal-01727467v1 |
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openpolar |
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Open Polar |
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École des Ponts ParisTech: HAL |
op_collection_id |
ftecoleponts |
language |
English |
topic |
[SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Vignon, Etienne Hourdin, Frédéric Genthon, Christophe van de Wiel, Bas, J. H. Gallée, Hubert Madeleine, Jean-Baptiste Beaumet, Julien Modeling the Dynamics of the Atmospheric Boundary Layer Over the Antarctic Plateau With a General Circulation Model |
topic_facet |
[SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience Observations evidence extremely stable boundary layers (SBL) over the Antarctic Plateau and sharp regime transitions between weakly and very stable conditions. Representing such features is a challenge for climate models. This study assesses the modeling of the dynamics of the boundary layer over the Antarctic Plateau in the LMDZ general circulation model. It uses 1 year simulations with a stretched-grid over Dome C. The model is nudged with reanalyses outside of the Dome C region such as simulations can be directly compared to in situ observations. We underline the critical role of the downward longwave radiation for modeling the surface temperature. LMDZ reasonably represents the near-surface seasonal profiles of wind and temperature but strong temperature inversions are degraded by enhanced turbulent mixing formulations. Unlike ERA-Interim reanalyses, LMDZ reproduces two SBL regimes and the regime transition, with a sudden increase in the near-surface inversion with decreasing wind speed. The sharpness of the transition depends on the stability function used for calculating the surface drag coefficient. Moreover, using a refined vertical grid leads to a better reversed ''S-shaped'' relationship between the inversion and the wind. Sudden warming events associated to synoptic advections of warm and moist air are also well reproduced. Near-surface supersaturation with respect to ice is not allowed in LMDZ but the impact on the SBL structure is moderate. Finally, climate simulations with the free model show that the recommended configuration leads to stronger inversions and winds over the ice-sheet. However, the near-surface wind remains underestimated over the slopes of East-Antarctica. |
author2 |
Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 )-Observatoire des Sciences de l'Univers de Grenoble (Fédération OSUG) Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X) Institut Polytechnique de Paris (IP Paris)-Institut Polytechnique de Paris (IP Paris)-École des Ponts ParisTech (ENPC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL) Delft University of Technology (TU Delft) |
format |
Article in Journal/Newspaper |
author |
Vignon, Etienne Hourdin, Frédéric Genthon, Christophe van de Wiel, Bas, J. H. Gallée, Hubert Madeleine, Jean-Baptiste Beaumet, Julien |
author_facet |
Vignon, Etienne Hourdin, Frédéric Genthon, Christophe van de Wiel, Bas, J. H. Gallée, Hubert Madeleine, Jean-Baptiste Beaumet, Julien |
author_sort |
Vignon, Etienne |
title |
Modeling the Dynamics of the Atmospheric Boundary Layer Over the Antarctic Plateau With a General Circulation Model |
title_short |
Modeling the Dynamics of the Atmospheric Boundary Layer Over the Antarctic Plateau With a General Circulation Model |
title_full |
Modeling the Dynamics of the Atmospheric Boundary Layer Over the Antarctic Plateau With a General Circulation Model |
title_fullStr |
Modeling the Dynamics of the Atmospheric Boundary Layer Over the Antarctic Plateau With a General Circulation Model |
title_full_unstemmed |
Modeling the Dynamics of the Atmospheric Boundary Layer Over the Antarctic Plateau With a General Circulation Model |
title_sort |
modeling the dynamics of the atmospheric boundary layer over the antarctic plateau with a general circulation model |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.sorbonne-universite.fr/hal-01727467 https://hal.sorbonne-universite.fr/hal-01727467v1/document https://hal.sorbonne-universite.fr/hal-01727467v1/file/Vignon_et_al-2018-Journal_of_Advances_in_Modeling_Earth_Systems.pdf https://doi.org/10.1002/2017MS001184 |
geographic |
Antarctic East Antarctica The Antarctic |
geographic_facet |
Antarctic East Antarctica The Antarctic |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet |
op_source |
ISSN: 1942-2466 Journal of Advances in Modeling Earth Systems https://hal.sorbonne-universite.fr/hal-01727467 Journal of Advances in Modeling Earth Systems, 2018, 10 (1), pp.98-125. ⟨10.1002/2017MS001184⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/2017MS001184 doi:10.1002/2017MS001184 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1002/2017MS001184 |
container_title |
Journal of Advances in Modeling Earth Systems |
container_volume |
10 |
container_issue |
1 |
container_start_page |
98 |
op_container_end_page |
125 |
_version_ |
1812815821883310080 |
spelling |
ftecoleponts:oai:HAL:hal-01727467v1 2024-10-13T14:02:14+00:00 Modeling the Dynamics of the Atmospheric Boundary Layer Over the Antarctic Plateau With a General Circulation Model Vignon, Etienne Hourdin, Frédéric Genthon, Christophe van de Wiel, Bas, J. H. Gallée, Hubert Madeleine, Jean-Baptiste Beaumet, Julien Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 )-Observatoire des Sciences de l'Univers de Grenoble (Fédération OSUG) Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X) Institut Polytechnique de Paris (IP Paris)-Institut Polytechnique de Paris (IP Paris)-École des Ponts ParisTech (ENPC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL) Delft University of Technology (TU Delft) 2018 https://hal.sorbonne-universite.fr/hal-01727467 https://hal.sorbonne-universite.fr/hal-01727467v1/document https://hal.sorbonne-universite.fr/hal-01727467v1/file/Vignon_et_al-2018-Journal_of_Advances_in_Modeling_Earth_Systems.pdf https://doi.org/10.1002/2017MS001184 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1002/2017MS001184 doi:10.1002/2017MS001184 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1942-2466 Journal of Advances in Modeling Earth Systems https://hal.sorbonne-universite.fr/hal-01727467 Journal of Advances in Modeling Earth Systems, 2018, 10 (1), pp.98-125. ⟨10.1002/2017MS001184⟩ [SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2018 ftecoleponts https://doi.org/10.1002/2017MS001184 2024-09-24T23:49:23Z International audience Observations evidence extremely stable boundary layers (SBL) over the Antarctic Plateau and sharp regime transitions between weakly and very stable conditions. Representing such features is a challenge for climate models. This study assesses the modeling of the dynamics of the boundary layer over the Antarctic Plateau in the LMDZ general circulation model. It uses 1 year simulations with a stretched-grid over Dome C. The model is nudged with reanalyses outside of the Dome C region such as simulations can be directly compared to in situ observations. We underline the critical role of the downward longwave radiation for modeling the surface temperature. LMDZ reasonably represents the near-surface seasonal profiles of wind and temperature but strong temperature inversions are degraded by enhanced turbulent mixing formulations. Unlike ERA-Interim reanalyses, LMDZ reproduces two SBL regimes and the regime transition, with a sudden increase in the near-surface inversion with decreasing wind speed. The sharpness of the transition depends on the stability function used for calculating the surface drag coefficient. Moreover, using a refined vertical grid leads to a better reversed ''S-shaped'' relationship between the inversion and the wind. Sudden warming events associated to synoptic advections of warm and moist air are also well reproduced. Near-surface supersaturation with respect to ice is not allowed in LMDZ but the impact on the SBL structure is moderate. Finally, climate simulations with the free model show that the recommended configuration leads to stronger inversions and winds over the ice-sheet. However, the near-surface wind remains underestimated over the slopes of East-Antarctica. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ice Sheet École des Ponts ParisTech: HAL Antarctic East Antarctica The Antarctic Journal of Advances in Modeling Earth Systems 10 1 98 125 |