Ocean circulation, ice shelf, and sea ice interactions explain Dansgaard–Oeschger cycles
International audience Paleoclimatic proxy records from Greenland ice cores show that the last glacial interval was punctuated by abrupt climatic transitions called Dansgaard–Oeschger (DO) events. These events are characterized by temperature increases over Greenland of up to 15°C within a few decad...
Published in: | Proceedings of the National Academy of Sciences |
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Online Access: | https://hal.science/hal-02352633 https://hal.science/hal-02352633/document https://hal.science/hal-02352633/file/DDR_PNAS2018Boers.pdf https://doi.org/10.1073/pnas.1802573115 |
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ftepunivpsaclay:oai:HAL:hal-02352633v1 2024-06-09T07:40:24+00:00 Ocean circulation, ice shelf, and sea ice interactions explain Dansgaard–Oeschger cycles Boers, Niklas Ghil, Michael Rousseau, Denis-Didier Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-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) Potsdam-Institut für Klimafolgenforschung (PIK) Grantham Institute for Climate Change and the Environment Imperial College London Department of Atmospheric and Oceanic Sciences Los Angeles (AOS) University of California Los Angeles (UCLA) University of California (UC)-University of California (UC) Lamont-Doherty Earth Observatory (LDEO) Columbia University New York 2018 https://hal.science/hal-02352633 https://hal.science/hal-02352633/document https://hal.science/hal-02352633/file/DDR_PNAS2018Boers.pdf https://doi.org/10.1073/pnas.1802573115 en eng HAL CCSD National Academy of Sciences info:eu-repo/semantics/altIdentifier/doi/10.1073/pnas.1802573115 hal-02352633 https://hal.science/hal-02352633 https://hal.science/hal-02352633/document https://hal.science/hal-02352633/file/DDR_PNAS2018Boers.pdf doi:10.1073/pnas.1802573115 PUBMEDCENTRAL: PMC6255200 info:eu-repo/semantics/OpenAccess ISSN: 0027-8424 EISSN: 1091-6490 Proceedings of the National Academy of Sciences of the United States of America https://hal.science/hal-02352633 Proceedings of the National Academy of Sciences of the United States of America, 2018, 115 (47), pp.E11005-E11014. ⟨10.1073/pnas.1802573115⟩ millennial climate variability nonlinear climate modeling north–south seesaw Bayesian parameter estimation [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/article Journal articles 2018 ftepunivpsaclay https://doi.org/10.1073/pnas.1802573115 2024-05-16T11:37:12Z International audience Paleoclimatic proxy records from Greenland ice cores show that the last glacial interval was punctuated by abrupt climatic transitions called Dansgaard–Oeschger (DO) events. These events are characterized by temperature increases over Greenland of up to 15°C within a few decades. The cause of these transitions and their out-of-phase relationship with corresponding records from Antarctica remains unclear. Based on earlier hypotheses, we propose a model focusing on interactions between ice shelves, sea ice, and ocean currents to explain DO events in Greenland and their Antarctic counterparts. Our model reproduces the main features of the observations. Our study provides a potential explanation of DO events and could help assess more accurately the risk of abrupt climatic transitions in the future. Article in Journal/Newspaper Antarc* Antarctic Antarctica Greenland Greenland ice cores Ice Shelf Ice Shelves Sea ice École Polytechnique, Université Paris-Saclay: HAL Antarctic Greenland Proceedings of the National Academy of Sciences 115 47 E11005 E11014 |
institution |
Open Polar |
collection |
École Polytechnique, Université Paris-Saclay: HAL |
op_collection_id |
ftepunivpsaclay |
language |
English |
topic |
millennial climate variability nonlinear climate modeling north–south seesaw Bayesian parameter estimation [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
spellingShingle |
millennial climate variability nonlinear climate modeling north–south seesaw Bayesian parameter estimation [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Boers, Niklas Ghil, Michael Rousseau, Denis-Didier Ocean circulation, ice shelf, and sea ice interactions explain Dansgaard–Oeschger cycles |
topic_facet |
millennial climate variability nonlinear climate modeling north–south seesaw Bayesian parameter estimation [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
description |
International audience Paleoclimatic proxy records from Greenland ice cores show that the last glacial interval was punctuated by abrupt climatic transitions called Dansgaard–Oeschger (DO) events. These events are characterized by temperature increases over Greenland of up to 15°C within a few decades. The cause of these transitions and their out-of-phase relationship with corresponding records from Antarctica remains unclear. Based on earlier hypotheses, we propose a model focusing on interactions between ice shelves, sea ice, and ocean currents to explain DO events in Greenland and their Antarctic counterparts. Our model reproduces the main features of the observations. Our study provides a potential explanation of DO events and could help assess more accurately the risk of abrupt climatic transitions in the future. |
author2 |
Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-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) Potsdam-Institut für Klimafolgenforschung (PIK) Grantham Institute for Climate Change and the Environment Imperial College London Department of Atmospheric and Oceanic Sciences Los Angeles (AOS) University of California Los Angeles (UCLA) University of California (UC)-University of California (UC) Lamont-Doherty Earth Observatory (LDEO) Columbia University New York |
format |
Article in Journal/Newspaper |
author |
Boers, Niklas Ghil, Michael Rousseau, Denis-Didier |
author_facet |
Boers, Niklas Ghil, Michael Rousseau, Denis-Didier |
author_sort |
Boers, Niklas |
title |
Ocean circulation, ice shelf, and sea ice interactions explain Dansgaard–Oeschger cycles |
title_short |
Ocean circulation, ice shelf, and sea ice interactions explain Dansgaard–Oeschger cycles |
title_full |
Ocean circulation, ice shelf, and sea ice interactions explain Dansgaard–Oeschger cycles |
title_fullStr |
Ocean circulation, ice shelf, and sea ice interactions explain Dansgaard–Oeschger cycles |
title_full_unstemmed |
Ocean circulation, ice shelf, and sea ice interactions explain Dansgaard–Oeschger cycles |
title_sort |
ocean circulation, ice shelf, and sea ice interactions explain dansgaard–oeschger cycles |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.science/hal-02352633 https://hal.science/hal-02352633/document https://hal.science/hal-02352633/file/DDR_PNAS2018Boers.pdf https://doi.org/10.1073/pnas.1802573115 |
geographic |
Antarctic Greenland |
geographic_facet |
Antarctic Greenland |
genre |
Antarc* Antarctic Antarctica Greenland Greenland ice cores Ice Shelf Ice Shelves Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Greenland Greenland ice cores Ice Shelf Ice Shelves Sea ice |
op_source |
ISSN: 0027-8424 EISSN: 1091-6490 Proceedings of the National Academy of Sciences of the United States of America https://hal.science/hal-02352633 Proceedings of the National Academy of Sciences of the United States of America, 2018, 115 (47), pp.E11005-E11014. ⟨10.1073/pnas.1802573115⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1073/pnas.1802573115 hal-02352633 https://hal.science/hal-02352633 https://hal.science/hal-02352633/document https://hal.science/hal-02352633/file/DDR_PNAS2018Boers.pdf doi:10.1073/pnas.1802573115 PUBMEDCENTRAL: PMC6255200 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1073/pnas.1802573115 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
115 |
container_issue |
47 |
container_start_page |
E11005 |
op_container_end_page |
E11014 |
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1801383807730843648 |