Ice core evidence for decoupling between midlatitude atmospheric water cycle and Greenland temperature during the last deglaciation
The last deglaciation represents the most recent example of natural global warming associated with largescale climate changes. In addition to the long-term global temperature increase, the last deglaciation onset is punctuated by a sequence of abrupt changes in the Northern Hemisphere. Such interpla...
Published in: | Climate of the Past |
---|---|
Main Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Gesellschaft Mbh
2018
|
Subjects: | |
Online Access: | https://archimer.ifremer.fr/doc/00462/57349/59446.pdf https://archimer.ifremer.fr/doc/00462/57349/59447.pdf https://archimer.ifremer.fr/doc/00462/57349/59448.pdf https://archimer.ifremer.fr/doc/00462/57349/59449.xlsx https://archimer.ifremer.fr/doc/00462/57349/59450.pdf https://archimer.ifremer.fr/doc/00462/57349/59451.pdf https://doi.org/10.5194/cp-14-1405-2018 https://archimer.ifremer.fr/doc/00462/57349/ |
id |
ftarchimer:oai:archimer.ifremer.fr:57349 |
---|---|
record_format |
openpolar |
spelling |
ftarchimer:oai:archimer.ifremer.fr:57349 2023-05-15T13:50:50+02:00 Ice core evidence for decoupling between midlatitude atmospheric water cycle and Greenland temperature during the last deglaciation Landais, Amaelle Capron, Emilie Masson-delmotte, Valerie Toucanne, Samuel Rhodes, Rachael Popp, Trevor Vinther, Bo Minster, Benedicte Prie, Frederic 2018-10 application/pdf https://archimer.ifremer.fr/doc/00462/57349/59446.pdf https://archimer.ifremer.fr/doc/00462/57349/59447.pdf https://archimer.ifremer.fr/doc/00462/57349/59448.pdf https://archimer.ifremer.fr/doc/00462/57349/59449.xlsx https://archimer.ifremer.fr/doc/00462/57349/59450.pdf https://archimer.ifremer.fr/doc/00462/57349/59451.pdf https://doi.org/10.5194/cp-14-1405-2018 https://archimer.ifremer.fr/doc/00462/57349/ eng eng Copernicus Gesellschaft Mbh info:eu-repo/grantAgreement/EC/FP7/306045/EU//COMBINISO info:eu-repo/grantAgreement/EC/FP7/600207/EU//MOBILEX info:eu-repo/grantAgreement/EC/H2020/658120/EU//SEADOG https://archimer.ifremer.fr/doc/00462/57349/59446.pdf https://archimer.ifremer.fr/doc/00462/57349/59447.pdf https://archimer.ifremer.fr/doc/00462/57349/59448.pdf https://archimer.ifremer.fr/doc/00462/57349/59449.xlsx https://archimer.ifremer.fr/doc/00462/57349/59450.pdf https://archimer.ifremer.fr/doc/00462/57349/59451.pdf doi:10.5194/cp-14-1405-2018 https://archimer.ifremer.fr/doc/00462/57349/ info:eu-repo/semantics/openAccess restricted use Climate Of The Past (1814-9324) (Copernicus Gesellschaft Mbh), 2018-10 , Vol. 14 , N. 10 , P. 1405-1415 text Publication info:eu-repo/semantics/article 2018 ftarchimer https://doi.org/10.5194/cp-14-1405-2018 2021-09-23T20:31:38Z The last deglaciation represents the most recent example of natural global warming associated with largescale climate changes. In addition to the long-term global temperature increase, the last deglaciation onset is punctuated by a sequence of abrupt changes in the Northern Hemisphere. Such interplay between orbital-and millennial-scale variability is widely documented in paleoclimatic records but the underlying mechanisms are not fully understood. Limitations arise from the difficulty in constraining the sequence of events between external forcing, high-and low-latitude climate, and environmental changes. Greenland ice cores provide sub-decadal-scale records across the last deglaciation and contain fingerprints of climate variations occurring in different regions of the Northern Hemisphere. Here, we combine new ice d-excess and O-17-excess records, tracing changes in the midlatitudes, with ice delta O-18 records of polar climate. Within Heinrich Stadial 1, we demonstrate a decoupling between climatic conditions in Greenland and those of the lower latitudes. While Greenland temperature remains mostly stable from 17.5 to 14.7 ka, significant change in the midlatitudes of the northern Atlantic takes place at similar to 16:2 ka, associated with warmer and wetter conditions of Greenland moisture sources. We show that this climate modification is coincident with abrupt changes in atmospheric CO2 and CH4 concentrations recorded in an Antarctic ice core. Our coherent ice core chronological framework and comparison with other paleoclimate records suggests a mechanism involving two-step freshwater fluxes in the North Atlantic associated with a southward shift of the Intertropical Convergence Zone. Article in Journal/Newspaper Antarc* Antarctic Greenland Greenland ice cores ice core North Atlantic Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Antarctic Greenland Climate of the Past 14 10 1405 1415 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
The last deglaciation represents the most recent example of natural global warming associated with largescale climate changes. In addition to the long-term global temperature increase, the last deglaciation onset is punctuated by a sequence of abrupt changes in the Northern Hemisphere. Such interplay between orbital-and millennial-scale variability is widely documented in paleoclimatic records but the underlying mechanisms are not fully understood. Limitations arise from the difficulty in constraining the sequence of events between external forcing, high-and low-latitude climate, and environmental changes. Greenland ice cores provide sub-decadal-scale records across the last deglaciation and contain fingerprints of climate variations occurring in different regions of the Northern Hemisphere. Here, we combine new ice d-excess and O-17-excess records, tracing changes in the midlatitudes, with ice delta O-18 records of polar climate. Within Heinrich Stadial 1, we demonstrate a decoupling between climatic conditions in Greenland and those of the lower latitudes. While Greenland temperature remains mostly stable from 17.5 to 14.7 ka, significant change in the midlatitudes of the northern Atlantic takes place at similar to 16:2 ka, associated with warmer and wetter conditions of Greenland moisture sources. We show that this climate modification is coincident with abrupt changes in atmospheric CO2 and CH4 concentrations recorded in an Antarctic ice core. Our coherent ice core chronological framework and comparison with other paleoclimate records suggests a mechanism involving two-step freshwater fluxes in the North Atlantic associated with a southward shift of the Intertropical Convergence Zone. |
format |
Article in Journal/Newspaper |
author |
Landais, Amaelle Capron, Emilie Masson-delmotte, Valerie Toucanne, Samuel Rhodes, Rachael Popp, Trevor Vinther, Bo Minster, Benedicte Prie, Frederic |
spellingShingle |
Landais, Amaelle Capron, Emilie Masson-delmotte, Valerie Toucanne, Samuel Rhodes, Rachael Popp, Trevor Vinther, Bo Minster, Benedicte Prie, Frederic Ice core evidence for decoupling between midlatitude atmospheric water cycle and Greenland temperature during the last deglaciation |
author_facet |
Landais, Amaelle Capron, Emilie Masson-delmotte, Valerie Toucanne, Samuel Rhodes, Rachael Popp, Trevor Vinther, Bo Minster, Benedicte Prie, Frederic |
author_sort |
Landais, Amaelle |
title |
Ice core evidence for decoupling between midlatitude atmospheric water cycle and Greenland temperature during the last deglaciation |
title_short |
Ice core evidence for decoupling between midlatitude atmospheric water cycle and Greenland temperature during the last deglaciation |
title_full |
Ice core evidence for decoupling between midlatitude atmospheric water cycle and Greenland temperature during the last deglaciation |
title_fullStr |
Ice core evidence for decoupling between midlatitude atmospheric water cycle and Greenland temperature during the last deglaciation |
title_full_unstemmed |
Ice core evidence for decoupling between midlatitude atmospheric water cycle and Greenland temperature during the last deglaciation |
title_sort |
ice core evidence for decoupling between midlatitude atmospheric water cycle and greenland temperature during the last deglaciation |
publisher |
Copernicus Gesellschaft Mbh |
publishDate |
2018 |
url |
https://archimer.ifremer.fr/doc/00462/57349/59446.pdf https://archimer.ifremer.fr/doc/00462/57349/59447.pdf https://archimer.ifremer.fr/doc/00462/57349/59448.pdf https://archimer.ifremer.fr/doc/00462/57349/59449.xlsx https://archimer.ifremer.fr/doc/00462/57349/59450.pdf https://archimer.ifremer.fr/doc/00462/57349/59451.pdf https://doi.org/10.5194/cp-14-1405-2018 https://archimer.ifremer.fr/doc/00462/57349/ |
geographic |
Antarctic Greenland |
geographic_facet |
Antarctic Greenland |
genre |
Antarc* Antarctic Greenland Greenland ice cores ice core North Atlantic |
genre_facet |
Antarc* Antarctic Greenland Greenland ice cores ice core North Atlantic |
op_source |
Climate Of The Past (1814-9324) (Copernicus Gesellschaft Mbh), 2018-10 , Vol. 14 , N. 10 , P. 1405-1415 |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/306045/EU//COMBINISO info:eu-repo/grantAgreement/EC/FP7/600207/EU//MOBILEX info:eu-repo/grantAgreement/EC/H2020/658120/EU//SEADOG https://archimer.ifremer.fr/doc/00462/57349/59446.pdf https://archimer.ifremer.fr/doc/00462/57349/59447.pdf https://archimer.ifremer.fr/doc/00462/57349/59448.pdf https://archimer.ifremer.fr/doc/00462/57349/59449.xlsx https://archimer.ifremer.fr/doc/00462/57349/59450.pdf https://archimer.ifremer.fr/doc/00462/57349/59451.pdf doi:10.5194/cp-14-1405-2018 https://archimer.ifremer.fr/doc/00462/57349/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.5194/cp-14-1405-2018 |
container_title |
Climate of the Past |
container_volume |
14 |
container_issue |
10 |
container_start_page |
1405 |
op_container_end_page |
1415 |
_version_ |
1766254167166287872 |