The contrasting effects of thermodynamic and dynamic processes on East Asian summer monsoon precipitation during the Last Glacial Maximum: a data-model comparison
International audience Abstract The Last Glacial Maximum (LGM; 21 ka BP) was the most recent glacial period when the global ice sheet volume was at a maximum. Therefore, the LGM can be used to investigate atmospheric dynamics under a climate that differed significantly from the present. This study q...
Published in: | Climate Dynamics |
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Main Authors: | , , , , , , , , , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2021
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Online Access: | https://hal.science/hal-03331787 https://hal.science/hal-03331787/document https://hal.science/hal-03331787/file/Sun2021_Article_TheContrastingEffectsOfThermod.pdf https://doi.org/10.1007/s00382-020-05533-7 |
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ftuniversailles:oai:HAL:hal-03331787v1 |
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Open Polar |
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Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
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ftuniversailles |
language |
English |
topic |
[SDE]Environmental Sciences [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDE]Environmental Sciences [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Sun, Yong Wu, Haibin Kageyama, Masa Ramstein, Gilles Li, Laurent Tan, Ning Lin, Yating Liu, Bo Zheng, Weipeng Zhang, Wenchao Zou, Liwei Zhou, Tianjun The contrasting effects of thermodynamic and dynamic processes on East Asian summer monsoon precipitation during the Last Glacial Maximum: a data-model comparison |
topic_facet |
[SDE]Environmental Sciences [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience Abstract The Last Glacial Maximum (LGM; 21 ka BP) was the most recent glacial period when the global ice sheet volume was at a maximum. Therefore, the LGM can be used to investigate atmospheric dynamics under a climate that differed significantly from the present. This study quantitatively compares pollen records of boreal summer (June–July–August) precipitation with the PMIP3 LGM simulations. The data-model comparison shows an overall agreement on a drier than pre-industrial East Asian summer monsoon (EASM) climate. Nevertheless, 17 out of 55 records show a regional precipitation increase that is also simulated over the additional land mass area due to sea level drop. The thermodynamic and dynamic responses are analyzed to explain a drier LGM EASM as a combination of these two antagonistic mechanisms. Relatively low atmospheric moisture content was the main thermodynamic control on the lower LGM (relative to pre-industrial levels) EASM precipitation amounts in both the reconstructions and the models. In contrast, two dynamic processes in relation to stationary eddy activity act to increase EASM precipitation regionally in records and simulations, respectively. Precipitation increase in records is explained by dynamic enhancement of the horizontal moisture transport, while dynamic enhancement of the vertical moisture transport leads to simulated precipitation increase over the specific region where landmass was exposed during LGM along continental coastlines of China due to significant drop in sea level (relative to pre-industrial levels). Overall, the opposing effects of thermodynamic and dynamic processes on precipitation during the LGM provide a means to reconcile the spatial heterogeneity of recorded precipitation changes in sign, although data-model comparison suggests that the simulated dynamic wetting mechanism is too weak relative to the thermodynamic drying mechanism over data-model disagreement regions. |
author2 |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-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) |
format |
Article in Journal/Newspaper |
author |
Sun, Yong Wu, Haibin Kageyama, Masa Ramstein, Gilles Li, Laurent Tan, Ning Lin, Yating Liu, Bo Zheng, Weipeng Zhang, Wenchao Zou, Liwei Zhou, Tianjun |
author_facet |
Sun, Yong Wu, Haibin Kageyama, Masa Ramstein, Gilles Li, Laurent Tan, Ning Lin, Yating Liu, Bo Zheng, Weipeng Zhang, Wenchao Zou, Liwei Zhou, Tianjun |
author_sort |
Sun, Yong |
title |
The contrasting effects of thermodynamic and dynamic processes on East Asian summer monsoon precipitation during the Last Glacial Maximum: a data-model comparison |
title_short |
The contrasting effects of thermodynamic and dynamic processes on East Asian summer monsoon precipitation during the Last Glacial Maximum: a data-model comparison |
title_full |
The contrasting effects of thermodynamic and dynamic processes on East Asian summer monsoon precipitation during the Last Glacial Maximum: a data-model comparison |
title_fullStr |
The contrasting effects of thermodynamic and dynamic processes on East Asian summer monsoon precipitation during the Last Glacial Maximum: a data-model comparison |
title_full_unstemmed |
The contrasting effects of thermodynamic and dynamic processes on East Asian summer monsoon precipitation during the Last Glacial Maximum: a data-model comparison |
title_sort |
contrasting effects of thermodynamic and dynamic processes on east asian summer monsoon precipitation during the last glacial maximum: a data-model comparison |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.science/hal-03331787 https://hal.science/hal-03331787/document https://hal.science/hal-03331787/file/Sun2021_Article_TheContrastingEffectsOfThermod.pdf https://doi.org/10.1007/s00382-020-05533-7 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
ISSN: 0930-7575 EISSN: 1432-0894 Climate Dynamics https://hal.science/hal-03331787 Climate Dynamics, 2021, 56 (3-4), pp.1303-1316. ⟨10.1007/s00382-020-05533-7⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-020-05533-7 hal-03331787 https://hal.science/hal-03331787 https://hal.science/hal-03331787/document https://hal.science/hal-03331787/file/Sun2021_Article_TheContrastingEffectsOfThermod.pdf doi:10.1007/s00382-020-05533-7 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1007/s00382-020-05533-7 |
container_title |
Climate Dynamics |
container_volume |
56 |
container_issue |
3-4 |
container_start_page |
1303 |
op_container_end_page |
1316 |
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1799481909963653120 |
spelling |
ftuniversailles:oai:HAL:hal-03331787v1 2024-05-19T07:42:15+00:00 The contrasting effects of thermodynamic and dynamic processes on East Asian summer monsoon precipitation during the Last Glacial Maximum: a data-model comparison Sun, Yong Wu, Haibin Kageyama, Masa Ramstein, Gilles Li, Laurent Tan, Ning Lin, Yating Liu, Bo Zheng, Weipeng Zhang, Wenchao Zou, Liwei Zhou, Tianjun Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-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) 2021-02 https://hal.science/hal-03331787 https://hal.science/hal-03331787/document https://hal.science/hal-03331787/file/Sun2021_Article_TheContrastingEffectsOfThermod.pdf https://doi.org/10.1007/s00382-020-05533-7 en eng HAL CCSD Springer Verlag info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-020-05533-7 hal-03331787 https://hal.science/hal-03331787 https://hal.science/hal-03331787/document https://hal.science/hal-03331787/file/Sun2021_Article_TheContrastingEffectsOfThermod.pdf doi:10.1007/s00382-020-05533-7 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0930-7575 EISSN: 1432-0894 Climate Dynamics https://hal.science/hal-03331787 Climate Dynamics, 2021, 56 (3-4), pp.1303-1316. ⟨10.1007/s00382-020-05533-7⟩ [SDE]Environmental Sciences [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 2021 ftuniversailles https://doi.org/10.1007/s00382-020-05533-7 2024-04-25T00:26:17Z International audience Abstract The Last Glacial Maximum (LGM; 21 ka BP) was the most recent glacial period when the global ice sheet volume was at a maximum. Therefore, the LGM can be used to investigate atmospheric dynamics under a climate that differed significantly from the present. This study quantitatively compares pollen records of boreal summer (June–July–August) precipitation with the PMIP3 LGM simulations. The data-model comparison shows an overall agreement on a drier than pre-industrial East Asian summer monsoon (EASM) climate. Nevertheless, 17 out of 55 records show a regional precipitation increase that is also simulated over the additional land mass area due to sea level drop. The thermodynamic and dynamic responses are analyzed to explain a drier LGM EASM as a combination of these two antagonistic mechanisms. Relatively low atmospheric moisture content was the main thermodynamic control on the lower LGM (relative to pre-industrial levels) EASM precipitation amounts in both the reconstructions and the models. In contrast, two dynamic processes in relation to stationary eddy activity act to increase EASM precipitation regionally in records and simulations, respectively. Precipitation increase in records is explained by dynamic enhancement of the horizontal moisture transport, while dynamic enhancement of the vertical moisture transport leads to simulated precipitation increase over the specific region where landmass was exposed during LGM along continental coastlines of China due to significant drop in sea level (relative to pre-industrial levels). Overall, the opposing effects of thermodynamic and dynamic processes on precipitation during the LGM provide a means to reconcile the spatial heterogeneity of recorded precipitation changes in sign, although data-model comparison suggests that the simulated dynamic wetting mechanism is too weak relative to the thermodynamic drying mechanism over data-model disagreement regions. Article in Journal/Newspaper Ice Sheet Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ Climate Dynamics 56 3-4 1303 1316 |