Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Laurentide Ice Sheet meltwater and abrupt climate change during the last glaciation

Laurentide Ice Sheet meltwater and abrupt climate change during the last glaciation A leading hypothesis to explain abrupt climate change during the last glacial cycle calls on fluctuations in the margin of the North American Laurentide Ice Sheet (LIS), which may have routed fresh water between the Gulf of Mexico (GOM) and the North Atlantic, affecting North Atlantic Deep Water variability and regional climate. Paired measurements of δ18O and Mg/Ca of foraminiferal calcite from GOM sediments reveal five episodes of LIS meltwater input from 28 to 45 thousand years ago (ka) that do not match the millennial‐scale Dansgaard‐Oeschger warmings recorded in Greenland ice. We suggest that summer melting of the LIS may occur during Antarctic warming and likely contributed to sea level variability during marine isotope stage 3. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Paleoceanography and Paleoclimatology Wiley

Laurentide Ice Sheet meltwater and abrupt climate change during the last glaciation

Loading next page...
 
/lp/wiley/laurentide-ice-sheet-meltwater-and-abrupt-climate-change-during-the-YHd0SeaWay

References (48)

Publisher
Wiley
Copyright
Copyright © 2006 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0883-8305
eISSN
2572-4525
DOI
10.1029/2005PA001186
Publisher site
See Article on Publisher Site

Abstract

A leading hypothesis to explain abrupt climate change during the last glacial cycle calls on fluctuations in the margin of the North American Laurentide Ice Sheet (LIS), which may have routed fresh water between the Gulf of Mexico (GOM) and the North Atlantic, affecting North Atlantic Deep Water variability and regional climate. Paired measurements of δ18O and Mg/Ca of foraminiferal calcite from GOM sediments reveal five episodes of LIS meltwater input from 28 to 45 thousand years ago (ka) that do not match the millennial‐scale Dansgaard‐Oeschger warmings recorded in Greenland ice. We suggest that summer melting of the LIS may occur during Antarctic warming and likely contributed to sea level variability during marine isotope stage 3.

Journal

Paleoceanography and PaleoclimatologyWiley

Published: Mar 1, 2006

Keywords: ; ; ;

There are no references for this article.