Reappraisal of Antarctic seasonal sea ice at the Last Glacial Maximum
International audience We used modern analog technique applied to Antarctic diatoms to quantitatively reconstruct seasonal sea‐ice extent at the Last Glacial Maximum. Winter maximum sea‐ice limit occurred around 48°S in the Atlantic and western Indian sectors, around 55°S in the eastern Indian and w...
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Online Access: | https://hal.science/hal-02105711 https://hal.science/hal-02105711/document https://hal.science/hal-02105711/file/Crosta_GRL1998.pdf https://doi.org/10.1029/98GL02012 |
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ftinsu:oai:HAL:hal-02105711v1 2023-06-18T03:36:16+02:00 Reappraisal of Antarctic seasonal sea ice at the Last Glacial Maximum Crosta, Xavier Pichon, Jean-Jacques Burckle, Lloyd H. Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) Lamont-Doherty Earth Observatory (LDEO) Columbia University New York 1998 https://hal.science/hal-02105711 https://hal.science/hal-02105711/document https://hal.science/hal-02105711/file/Crosta_GRL1998.pdf https://doi.org/10.1029/98GL02012 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/98GL02012 hal-02105711 https://hal.science/hal-02105711 https://hal.science/hal-02105711/document https://hal.science/hal-02105711/file/Crosta_GRL1998.pdf doi:10.1029/98GL02012 info:eu-repo/semantics/OpenAccess ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/hal-02105711 Geophysical Research Letters, 1998, 25 (14), pp.2703-2706. ⟨10.1029/98GL02012⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 1998 ftinsu https://doi.org/10.1029/98GL02012 2023-06-05T23:55:02Z International audience We used modern analog technique applied to Antarctic diatoms to quantitatively reconstruct seasonal sea‐ice extent at the Last Glacial Maximum. Winter maximum sea‐ice limit occurred around 48°S in the Atlantic and western Indian sectors, around 55°S in the eastern Indian and western Pacific sectors, and around 58–60°S in the eastern Pacific sector of the Southern Ocean. Summer maximum sea‐ice extents during the last ice age and today are similar, which contradicts CLIMAP's findings. This implies a reduced summer albedo feedback of the Southern Hemisphere and a greater transfer of heat and moisture from the ocean to the atmosphere than shown by previous qualitative studies. Article in Journal/Newspaper Antarc* Antarctic Sea ice Southern Ocean Institut national des sciences de l'Univers: HAL-INSU Antarctic Indian Pacific Southern Ocean Geophysical Research Letters 25 14 2703 2706 |
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.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Crosta, Xavier Pichon, Jean-Jacques Burckle, Lloyd H. Reappraisal of Antarctic seasonal sea ice at the Last Glacial Maximum |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience We used modern analog technique applied to Antarctic diatoms to quantitatively reconstruct seasonal sea‐ice extent at the Last Glacial Maximum. Winter maximum sea‐ice limit occurred around 48°S in the Atlantic and western Indian sectors, around 55°S in the eastern Indian and western Pacific sectors, and around 58–60°S in the eastern Pacific sector of the Southern Ocean. Summer maximum sea‐ice extents during the last ice age and today are similar, which contradicts CLIMAP's findings. This implies a reduced summer albedo feedback of the Southern Hemisphere and a greater transfer of heat and moisture from the ocean to the atmosphere than shown by previous qualitative studies. |
author2 |
Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) Lamont-Doherty Earth Observatory (LDEO) Columbia University New York |
format |
Article in Journal/Newspaper |
author |
Crosta, Xavier Pichon, Jean-Jacques Burckle, Lloyd H. |
author_facet |
Crosta, Xavier Pichon, Jean-Jacques Burckle, Lloyd H. |
author_sort |
Crosta, Xavier |
title |
Reappraisal of Antarctic seasonal sea ice at the Last Glacial Maximum |
title_short |
Reappraisal of Antarctic seasonal sea ice at the Last Glacial Maximum |
title_full |
Reappraisal of Antarctic seasonal sea ice at the Last Glacial Maximum |
title_fullStr |
Reappraisal of Antarctic seasonal sea ice at the Last Glacial Maximum |
title_full_unstemmed |
Reappraisal of Antarctic seasonal sea ice at the Last Glacial Maximum |
title_sort |
reappraisal of antarctic seasonal sea ice at the last glacial maximum |
publisher |
HAL CCSD |
publishDate |
1998 |
url |
https://hal.science/hal-02105711 https://hal.science/hal-02105711/document https://hal.science/hal-02105711/file/Crosta_GRL1998.pdf https://doi.org/10.1029/98GL02012 |
geographic |
Antarctic Indian Pacific Southern Ocean |
geographic_facet |
Antarctic Indian Pacific Southern Ocean |
genre |
Antarc* Antarctic Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Sea ice Southern Ocean |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/hal-02105711 Geophysical Research Letters, 1998, 25 (14), pp.2703-2706. ⟨10.1029/98GL02012⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/98GL02012 hal-02105711 https://hal.science/hal-02105711 https://hal.science/hal-02105711/document https://hal.science/hal-02105711/file/Crosta_GRL1998.pdf doi:10.1029/98GL02012 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/98GL02012 |
container_title |
Geophysical Research Letters |
container_volume |
25 |
container_issue |
14 |
container_start_page |
2703 |
op_container_end_page |
2706 |
_version_ |
1769005486951104512 |