Timing of meltwater pulse 1a and climate responses to meltwater injections
Udgivelsesdato: 9 Dec. The temporal relationship between meltwater pulse 1a (mwp-1a) and the climate history of the last deglaciation remains a subject of debate. By combining the Greenland Ice Core Project d 18 O ice core record on the new Greenland ice core chronology 2005 timescale with the U/Th-...
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Online Access: | https://curis.ku.dk/portal/da/publications/timing-of-meltwater-pulse-1a-and-climate-responses-to-meltwater-injections(ed664a90-6c36-11dc-bee9-02004c4f4f50).html https://doi.org/10.1029/2006PA001340 |
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ftcopenhagenunip:oai:pure.atira.dk:publications/ed664a90-6c36-11dc-bee9-02004c4f4f50 2024-06-09T07:44:14+00:00 Timing of meltwater pulse 1a and climate responses to meltwater injections Stanford, Jennifer D. Rohling, Eelco J. Hunter, Sally E. Roberts, Andrew P. Rasmussen, Sune Olander Bard, Edouard McManus, Jerry Fairbanks, Richard G 2006 https://curis.ku.dk/portal/da/publications/timing-of-meltwater-pulse-1a-and-climate-responses-to-meltwater-injections(ed664a90-6c36-11dc-bee9-02004c4f4f50).html https://doi.org/10.1029/2006PA001340 eng eng info:eu-repo/semantics/restrictedAccess Stanford , J D , Rohling , E J , Hunter , S E , Roberts , A P , Rasmussen , S O , Bard , E , McManus , J & Fairbanks , R G 2006 , ' Timing of meltwater pulse 1a and climate responses to meltwater injections ' , Paleoceanography , vol. 21 , no. 4 , pp. PA4103 . https://doi.org/10.1029/2006PA001340 article 2006 ftcopenhagenunip https://doi.org/10.1029/2006PA001340 2024-05-16T11:29:15Z Udgivelsesdato: 9 Dec. The temporal relationship between meltwater pulse 1a (mwp-1a) and the climate history of the last deglaciation remains a subject of debate. By combining the Greenland Ice Core Project d 18 O ice core record on the new Greenland ice core chronology 2005 timescale with the U/Th-dated Barbados coral record, we conclusively derive that mwp-1a did not coincide with the sharp Bølling warming but instead with the abrupt cooling of the Older Dryas. To evaluate whether there is a relationship between meltwater injections, North Atlantic Deep Water (NADW) formation, and climate change, we present a high-resolution record of NADW flow intensity from Eirik Drift through the last deglaciation. It indicates only a relatively minor 200-year weakening of NADW flow, coincident with mwp-1a. Our compilation of records also indicates that during Heinrich event 1 and the Younger Dryas there were no discernible sea level rises, and yet these periods were characterized by intense NADW slowdowns/shutdowns. Clearly, deepwater formation and climate are not simply controlled by the magnitude or rate of meltwater addition. Instead, our results emphasize that the location of meltwater pulses may be more important, with NADW formation being particularly sensitive to surface freshening in the Arctic/Nordic Seas. Article in Journal/Newspaper Arctic Climate change Greenland Greenland ice core Greenland Ice core Project ice core NADW Nordic Seas North Atlantic Deep Water North Atlantic University of Copenhagen: Research Arctic Greenland Paleoceanography 21 4 |
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Open Polar |
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University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
description |
Udgivelsesdato: 9 Dec. The temporal relationship between meltwater pulse 1a (mwp-1a) and the climate history of the last deglaciation remains a subject of debate. By combining the Greenland Ice Core Project d 18 O ice core record on the new Greenland ice core chronology 2005 timescale with the U/Th-dated Barbados coral record, we conclusively derive that mwp-1a did not coincide with the sharp Bølling warming but instead with the abrupt cooling of the Older Dryas. To evaluate whether there is a relationship between meltwater injections, North Atlantic Deep Water (NADW) formation, and climate change, we present a high-resolution record of NADW flow intensity from Eirik Drift through the last deglaciation. It indicates only a relatively minor 200-year weakening of NADW flow, coincident with mwp-1a. Our compilation of records also indicates that during Heinrich event 1 and the Younger Dryas there were no discernible sea level rises, and yet these periods were characterized by intense NADW slowdowns/shutdowns. Clearly, deepwater formation and climate are not simply controlled by the magnitude or rate of meltwater addition. Instead, our results emphasize that the location of meltwater pulses may be more important, with NADW formation being particularly sensitive to surface freshening in the Arctic/Nordic Seas. |
format |
Article in Journal/Newspaper |
author |
Stanford, Jennifer D. Rohling, Eelco J. Hunter, Sally E. Roberts, Andrew P. Rasmussen, Sune Olander Bard, Edouard McManus, Jerry Fairbanks, Richard G |
spellingShingle |
Stanford, Jennifer D. Rohling, Eelco J. Hunter, Sally E. Roberts, Andrew P. Rasmussen, Sune Olander Bard, Edouard McManus, Jerry Fairbanks, Richard G Timing of meltwater pulse 1a and climate responses to meltwater injections |
author_facet |
Stanford, Jennifer D. Rohling, Eelco J. Hunter, Sally E. Roberts, Andrew P. Rasmussen, Sune Olander Bard, Edouard McManus, Jerry Fairbanks, Richard G |
author_sort |
Stanford, Jennifer D. |
title |
Timing of meltwater pulse 1a and climate responses to meltwater injections |
title_short |
Timing of meltwater pulse 1a and climate responses to meltwater injections |
title_full |
Timing of meltwater pulse 1a and climate responses to meltwater injections |
title_fullStr |
Timing of meltwater pulse 1a and climate responses to meltwater injections |
title_full_unstemmed |
Timing of meltwater pulse 1a and climate responses to meltwater injections |
title_sort |
timing of meltwater pulse 1a and climate responses to meltwater injections |
publishDate |
2006 |
url |
https://curis.ku.dk/portal/da/publications/timing-of-meltwater-pulse-1a-and-climate-responses-to-meltwater-injections(ed664a90-6c36-11dc-bee9-02004c4f4f50).html https://doi.org/10.1029/2006PA001340 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Climate change Greenland Greenland ice core Greenland Ice core Project ice core NADW Nordic Seas North Atlantic Deep Water North Atlantic |
genre_facet |
Arctic Climate change Greenland Greenland ice core Greenland Ice core Project ice core NADW Nordic Seas North Atlantic Deep Water North Atlantic |
op_source |
Stanford , J D , Rohling , E J , Hunter , S E , Roberts , A P , Rasmussen , S O , Bard , E , McManus , J & Fairbanks , R G 2006 , ' Timing of meltwater pulse 1a and climate responses to meltwater injections ' , Paleoceanography , vol. 21 , no. 4 , pp. PA4103 . https://doi.org/10.1029/2006PA001340 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1029/2006PA001340 |
container_title |
Paleoceanography |
container_volume |
21 |
container_issue |
4 |
_version_ |
1801373013873000448 |