Timing of meltwater pulse 1a and climate responses to meltwater injections
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 δ18O ice core record on the new Greenland ice core chronology 2005 timescale with the U/Th-dated Barbados coral reco...
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American Geophysical Union
2006
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Online Access: | https://doi.org/10.7916/D8HM588P |
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ftcolumbiauniv:oai:academiccommons.columbia.edu:10.7916/D8HM588P 2023-05-15T15:07:09+02:00 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 O. Bard, Edouard McManus, Jerry F. Fairbanks, Richard G. 2006 https://doi.org/10.7916/D8HM588P English eng American Geophysical Union https://doi.org/10.7916/D8HM588P Sea level--Research Climatic changes--Research Meltwater Chemical oceanography Hydrology Paleoclimatology Articles 2006 ftcolumbiauniv https://doi.org/10.7916/D8HM588P 2019-04-04T08:14:03Z 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 δ18O 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 Columbia University: Academic Commons Arctic Greenland |
institution |
Open Polar |
collection |
Columbia University: Academic Commons |
op_collection_id |
ftcolumbiauniv |
language |
English |
topic |
Sea level--Research Climatic changes--Research Meltwater Chemical oceanography Hydrology Paleoclimatology |
spellingShingle |
Sea level--Research Climatic changes--Research Meltwater Chemical oceanography Hydrology Paleoclimatology Stanford, Jennifer D. Rohling, Eelco J. Hunter, Sally E. Roberts, Andrew P. Rasmussen, Sune O. Bard, Edouard McManus, Jerry F. Fairbanks, Richard G. Timing of meltwater pulse 1a and climate responses to meltwater injections |
topic_facet |
Sea level--Research Climatic changes--Research Meltwater Chemical oceanography Hydrology Paleoclimatology |
description |
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 δ18O 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 O. Bard, Edouard McManus, Jerry F. Fairbanks, Richard G. |
author_facet |
Stanford, Jennifer D. Rohling, Eelco J. Hunter, Sally E. Roberts, Andrew P. Rasmussen, Sune O. Bard, Edouard McManus, Jerry F. 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 |
publisher |
American Geophysical Union |
publishDate |
2006 |
url |
https://doi.org/10.7916/D8HM588P |
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_relation |
https://doi.org/10.7916/D8HM588P |
op_doi |
https://doi.org/10.7916/D8HM588P |
_version_ |
1766338720367116288 |