Isotopic composition and origin of polar precipitation in present and glacial climate simulations
International audience The Hamburg atmospheric general circulation model (AGCM) ECHAM-4 is used to identify the main source regions of precipitation falling on Greenland and Antarctica. Both water isotopes H218O and HDO are explicitly built into the water cycle of the AGCM, and in addition the capab...
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ftinsu:oai:HAL:hal-03126079v1 2024-04-28T07:57:13+00:00 Isotopic composition and origin of polar precipitation in present and glacial climate simulations Werner, Martin Heimann, Martin Hoffmann, Georg Max-Planck-Institut für Meteorologie (MPI-M) Max-Planck-Gesellschaft Max-Planck-Institut für Biogeochemie (MPI-BGC) 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)) 2001 https://hal.science/hal-03126079 https://hal.science/hal-03126079/document https://hal.science/hal-03126079/file/Isotopic%20composition%20and%20origin%20of%20polar%20precipitation%20in%20present%20and%20glacial%20climate%20simulations.pdf https://doi.org/10.3402/tellusb.v53i1.16539 en eng HAL CCSD Taylor & Francis info:eu-repo/semantics/altIdentifier/doi/10.3402/tellusb.v53i1.16539 hal-03126079 https://hal.science/hal-03126079 https://hal.science/hal-03126079/document https://hal.science/hal-03126079/file/Isotopic%20composition%20and%20origin%20of%20polar%20precipitation%20in%20present%20and%20glacial%20climate%20simulations.pdf doi:10.3402/tellusb.v53i1.16539 info:eu-repo/semantics/OpenAccess ISSN: 0280-6509 EISSN: 1600-0889 Tellus B - Chemical and Physical Meteorology https://hal.science/hal-03126079 Tellus B - Chemical and Physical Meteorology, 2001, 53 (1), pp.53-71. ⟨10.3402/tellusb.v53i1.16539⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/article Journal articles 2001 ftinsu https://doi.org/10.3402/tellusb.v53i1.16539 2024-04-05T00:37:31Z International audience The Hamburg atmospheric general circulation model (AGCM) ECHAM-4 is used to identify the main source regions of precipitation falling on Greenland and Antarctica. Both water isotopes H218O and HDO are explicitly built into the water cycle of the AGCM, and in addition the capability to trace water from different source regions was added to the model. Present and LGM climate simulations show that water from the most important source regions has an isotopic signature similar to the mean isotope values of the total precipitation amount. But water from other source regions (with very different isotopic signatures) contributes an additional, non-negligible part of the total precipitation amount on both Greenland and Antarctica. Analyses of the temperature-isotope-relations for both polar regions reveal a solely bias of the glacial isotope signal on Greenland, which is caused by a strong change in the seasonal deposition of precipitation originating from nearby polar seas and the northern Atlantic. Although the performed simulations under LGM boundary conditions show a decrease of the δ18O values in precipitation in agreement with ice core measurements, the AGCM fails to reproduce the observed simultaneous decrease of the deuterium excess signal. Article in Journal/Newspaper Antarc* Antarctica Greenland ice core Institut national des sciences de l'Univers: HAL-INSU Tellus B: Chemical and Physical Meteorology 53 1 53 71 |
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.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Werner, Martin Heimann, Martin Hoffmann, Georg Isotopic composition and origin of polar precipitation in present and glacial climate simulations |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
description |
International audience The Hamburg atmospheric general circulation model (AGCM) ECHAM-4 is used to identify the main source regions of precipitation falling on Greenland and Antarctica. Both water isotopes H218O and HDO are explicitly built into the water cycle of the AGCM, and in addition the capability to trace water from different source regions was added to the model. Present and LGM climate simulations show that water from the most important source regions has an isotopic signature similar to the mean isotope values of the total precipitation amount. But water from other source regions (with very different isotopic signatures) contributes an additional, non-negligible part of the total precipitation amount on both Greenland and Antarctica. Analyses of the temperature-isotope-relations for both polar regions reveal a solely bias of the glacial isotope signal on Greenland, which is caused by a strong change in the seasonal deposition of precipitation originating from nearby polar seas and the northern Atlantic. Although the performed simulations under LGM boundary conditions show a decrease of the δ18O values in precipitation in agreement with ice core measurements, the AGCM fails to reproduce the observed simultaneous decrease of the deuterium excess signal. |
author2 |
Max-Planck-Institut für Meteorologie (MPI-M) Max-Planck-Gesellschaft Max-Planck-Institut für Biogeochemie (MPI-BGC) 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 |
Werner, Martin Heimann, Martin Hoffmann, Georg |
author_facet |
Werner, Martin Heimann, Martin Hoffmann, Georg |
author_sort |
Werner, Martin |
title |
Isotopic composition and origin of polar precipitation in present and glacial climate simulations |
title_short |
Isotopic composition and origin of polar precipitation in present and glacial climate simulations |
title_full |
Isotopic composition and origin of polar precipitation in present and glacial climate simulations |
title_fullStr |
Isotopic composition and origin of polar precipitation in present and glacial climate simulations |
title_full_unstemmed |
Isotopic composition and origin of polar precipitation in present and glacial climate simulations |
title_sort |
isotopic composition and origin of polar precipitation in present and glacial climate simulations |
publisher |
HAL CCSD |
publishDate |
2001 |
url |
https://hal.science/hal-03126079 https://hal.science/hal-03126079/document https://hal.science/hal-03126079/file/Isotopic%20composition%20and%20origin%20of%20polar%20precipitation%20in%20present%20and%20glacial%20climate%20simulations.pdf https://doi.org/10.3402/tellusb.v53i1.16539 |
genre |
Antarc* Antarctica Greenland ice core |
genre_facet |
Antarc* Antarctica Greenland ice core |
op_source |
ISSN: 0280-6509 EISSN: 1600-0889 Tellus B - Chemical and Physical Meteorology https://hal.science/hal-03126079 Tellus B - Chemical and Physical Meteorology, 2001, 53 (1), pp.53-71. ⟨10.3402/tellusb.v53i1.16539⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3402/tellusb.v53i1.16539 hal-03126079 https://hal.science/hal-03126079 https://hal.science/hal-03126079/document https://hal.science/hal-03126079/file/Isotopic%20composition%20and%20origin%20of%20polar%20precipitation%20in%20present%20and%20glacial%20climate%20simulations.pdf doi:10.3402/tellusb.v53i1.16539 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.3402/tellusb.v53i1.16539 |
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Tellus B: Chemical and Physical Meteorology |
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53 |
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