Timing of meltwater pulse 1a and climate responses to meltwater injections

Jennifer D. Stanford; Eelco J. Rohling; Sally E. Hunter; Andrew P. Roberts; Sune Olander Rasmussen; Edouard Bard; Jerry McManus; Richard G Fairbanks

doi:10.1029/2006PA001340

Timing of meltwater pulse 1a and climate responses to meltwater injections

Jennifer D. Stanford, Eelco J. Rohling, Sally E. Hunter, Andrew P. Roberts, Sune Olander Rasmussen, Edouard Bard, Jerry McManus, Richard G Fairbanks

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

181 Citationer (Scopus)

Abstract

Udgivelsesdato: 9 Dec.

Originalsprog	Engelsk
Tidsskrift	Paleoceanography
Vol/bind	21
Udgave nummer	4
Sider (fra-til)	PA4103
ISSN	0883-8305
DOI	https://doi.org/10.1029/2006PA001340
Status	Udgivet - 2006

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@article{ed664a906c3611dcbee902004c4f4f50,

title = "Timing of meltwater pulse 1a and climate responses to meltwater injections",

abstract = "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 d18O 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 B{\o}lling 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.",

author = "Stanford, {Jennifer D.} and Rohling, {Eelco J.} and Hunter, {Sally E.} and Roberts, {Andrew P.} and Rasmussen, {Sune Olander} and Edouard Bard and Jerry McManus and Fairbanks, {Richard G}",

note = "Paper id:: doi:10.1029/2006PA001340",

year = "2006",

doi = "10.1029/2006PA001340",

language = "English",

volume = "21",

pages = "PA4103",

journal = "Paleoceanography",

issn = "0883-8305",

publisher = "Wiley-Blackwell",

number = "4",

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TY - JOUR

T1 - Timing of meltwater pulse 1a and climate responses to meltwater injections

AU - Stanford, Jennifer D.

AU - Rohling, Eelco J.

AU - Hunter, Sally E.

AU - Roberts, Andrew P.

AU - Rasmussen, Sune Olander

AU - Bard, Edouard

AU - McManus, Jerry

AU - Fairbanks, Richard G

N1 - Paper id:: doi:10.1029/2006PA001340

PY - 2006

Y1 - 2006

N2 - 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 d18O 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.

AB - 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 d18O 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.

U2 - 10.1029/2006PA001340

DO - 10.1029/2006PA001340

M3 - Journal article

SN - 0883-8305

VL - 21

SP - PA4103

JO - Paleoceanography

JF - Paleoceanography

IS - 4

ER -