Climatic stability of the geographic origin of Antarctic precipitation simulated by an atmospheric general circulation model
International audience The geographic origin of Antarctic precipitation is important for icecore isotopic interpretation as well as ice-sheet mass-balance calculations. Here we estimate these moisture origins with the NASA/Goddard Institute of Space Studies atmospheric general circulation model, und...
Published in: | Annals of Glaciology |
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ftinsu:oai:HAL:hal-03104279v1 2024-04-28T07:55:27+00:00 Climatic stability of the geographic origin of Antarctic precipitation simulated by an atmospheric general circulation model Delaygue, Gilles Masson, Valérie Jouzel, Jean 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) Glaces et Continents, Climats et Isotopes Stables (GLACCIOS) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-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)) 1999 https://hal.science/hal-03104279 https://hal.science/hal-03104279/document https://hal.science/hal-03104279/file/div-class-title-climatic-stability-of-the-geographic-origin-of-antarctic-precipitation-simulated-by-an-atmospheric-general-circulation-model-div.pdf https://doi.org/10.3189/172756499781821544 en eng HAL CCSD Cambridge University Press info:eu-repo/semantics/altIdentifier/doi/10.3189/172756499781821544 hal-03104279 https://hal.science/hal-03104279 https://hal.science/hal-03104279/document https://hal.science/hal-03104279/file/div-class-title-climatic-stability-of-the-geographic-origin-of-antarctic-precipitation-simulated-by-an-atmospheric-general-circulation-model-div.pdf doi:10.3189/172756499781821544 info:eu-repo/semantics/OpenAccess ISSN: 0260-3055 EISSN: 1727-5644 Annals of Glaciology https://hal.science/hal-03104279 Annals of Glaciology, 1999, 29, pp.45-48. ⟨10.3189/172756499781821544⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 1999 ftinsu https://doi.org/10.3189/172756499781821544 2024-04-05T00:39:09Z International audience The geographic origin of Antarctic precipitation is important for icecore isotopic interpretation as well as ice-sheet mass-balance calculations. Here we estimate these moisture origins with the NASA/Goddard Institute of Space Studies atmospheric general circulation model, under different climatic conditions. This model reasonably simulates the broad features of the present-day observed hydrological cycle, and indicates a subtropical to subglacial (30^608 S) latitudinal origin for the Antarctic precipitation. We use different climatic reconstructions, all based on CLIMAP, for the Last Glacial Maximum (about 21000 years ago), which differ by the latitudinal sea-surface temperature gradient and seasonality. CLIMAP conditions increase the latitudinal gradient and the sea-ice extent, with the consequence of slightly enhancing the low-latitude origins. Shifting the seasonal cycle of oceanic prescribed conditions has an important effect on the hydrological cycle but less on the precipitation origin. Prescribing cooler tropical sea-surface temperatures, which decreases the latitudinal gradient, makes the latitudinal contributions closer to modern ones and increases the dominant oceanic sources. Globally the origins of Antarctic precipitation do not change significantly, either annually or seasonally. Article in Journal/Newspaper Annals of Glaciology Antarc* Antarctic Ice Sheet Sea ice Institut national des sciences de l'Univers: HAL-INSU Annals of Glaciology 29 45 48 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Delaygue, Gilles Masson, Valérie Jouzel, Jean Climatic stability of the geographic origin of Antarctic precipitation simulated by an atmospheric general circulation model |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience The geographic origin of Antarctic precipitation is important for icecore isotopic interpretation as well as ice-sheet mass-balance calculations. Here we estimate these moisture origins with the NASA/Goddard Institute of Space Studies atmospheric general circulation model, under different climatic conditions. This model reasonably simulates the broad features of the present-day observed hydrological cycle, and indicates a subtropical to subglacial (30^608 S) latitudinal origin for the Antarctic precipitation. We use different climatic reconstructions, all based on CLIMAP, for the Last Glacial Maximum (about 21000 years ago), which differ by the latitudinal sea-surface temperature gradient and seasonality. CLIMAP conditions increase the latitudinal gradient and the sea-ice extent, with the consequence of slightly enhancing the low-latitude origins. Shifting the seasonal cycle of oceanic prescribed conditions has an important effect on the hydrological cycle but less on the precipitation origin. Prescribing cooler tropical sea-surface temperatures, which decreases the latitudinal gradient, makes the latitudinal contributions closer to modern ones and increases the dominant oceanic sources. Globally the origins of Antarctic precipitation do not change significantly, either annually or seasonally. |
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) Glaces et Continents, Climats et Isotopes Stables (GLACCIOS) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-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)) |
format |
Article in Journal/Newspaper |
author |
Delaygue, Gilles Masson, Valérie Jouzel, Jean |
author_facet |
Delaygue, Gilles Masson, Valérie Jouzel, Jean |
author_sort |
Delaygue, Gilles |
title |
Climatic stability of the geographic origin of Antarctic precipitation simulated by an atmospheric general circulation model |
title_short |
Climatic stability of the geographic origin of Antarctic precipitation simulated by an atmospheric general circulation model |
title_full |
Climatic stability of the geographic origin of Antarctic precipitation simulated by an atmospheric general circulation model |
title_fullStr |
Climatic stability of the geographic origin of Antarctic precipitation simulated by an atmospheric general circulation model |
title_full_unstemmed |
Climatic stability of the geographic origin of Antarctic precipitation simulated by an atmospheric general circulation model |
title_sort |
climatic stability of the geographic origin of antarctic precipitation simulated by an atmospheric general circulation model |
publisher |
HAL CCSD |
publishDate |
1999 |
url |
https://hal.science/hal-03104279 https://hal.science/hal-03104279/document https://hal.science/hal-03104279/file/div-class-title-climatic-stability-of-the-geographic-origin-of-antarctic-precipitation-simulated-by-an-atmospheric-general-circulation-model-div.pdf https://doi.org/10.3189/172756499781821544 |
genre |
Annals of Glaciology Antarc* Antarctic Ice Sheet Sea ice |
genre_facet |
Annals of Glaciology Antarc* Antarctic Ice Sheet Sea ice |
op_source |
ISSN: 0260-3055 EISSN: 1727-5644 Annals of Glaciology https://hal.science/hal-03104279 Annals of Glaciology, 1999, 29, pp.45-48. ⟨10.3189/172756499781821544⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3189/172756499781821544 hal-03104279 https://hal.science/hal-03104279 https://hal.science/hal-03104279/document https://hal.science/hal-03104279/file/div-class-title-climatic-stability-of-the-geographic-origin-of-antarctic-precipitation-simulated-by-an-atmospheric-general-circulation-model-div.pdf doi:10.3189/172756499781821544 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.3189/172756499781821544 |
container_title |
Annals of Glaciology |
container_volume |
29 |
container_start_page |
45 |
op_container_end_page |
48 |
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1797580002370256896 |