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Article
Laurentide Ice Sheet Meltwater and Abrupt Climate Change During the Last Glaciation
Paleoceanography
  • Heather W. Hill, University of South Florida St. Petersburg
  • Benjamin P. Flower, University of South Florida St. Petersburg
  • Terrence M. Quinn, University of South Florida St. Petersburg
  • David J. Hollander, University of South Florida St. Petersburg
  • Thomas P. Guilderson, University of California, Santa Cruz
Document Type
Article
Publication Date
2-18-2006
Digital Object Identifier (DOI)
dx.doi.org/10.1029/2005PA001186
Disciplines
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 delta O-18 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.
Citation / Publisher Attribution

Paleoceanography, v. 21, no. 1, article PA1006.

Citation Information
Heather W. Hill, Benjamin P. Flower, Terrence M. Quinn, David J. Hollander, et al.. "Laurentide Ice Sheet Meltwater and Abrupt Climate Change During the Last Glaciation" Paleoceanography Vol. 21 Iss. 1 (2006)
Available at: http://works.bepress.com/david_hollander/2/