Holocene reconstruction of the West Greenland current and the Greenland Ice Sheet margin near Disko Bay using foraminiferal assemblages
by Walton, Mariah E., M.S., UNIVERSITY OF COLORADO AT BOULDER, 2010, 64 pages; 1487923

Abstract:

Recent Greenland Ice Sheet retreat has been shown to be caused at least in part by ocean subsurface warming. Foraminiferal assemblages and IRD counts from four marine sediment cores in the region of Disko Bay (West Greenland) are presented here to help explore the relationship between oceans and ice sheets. Faunal shifts indicate that Atlantic Waters via the West Greenland Current (WGC) were first felt in the bay sometime between 9 and 8.5 cal. kyr BP. A dramatic rise in calcareous fauna from 6.2 - 3.5 cal. kyr BP in all cores indicates a significant shift in the strength of the WGC, with Atlantic associated fauna peaking at 4.5 cal. kyr BP. This coincides with the believed retreat of Jakobshavn Isbrae behind its present margin, suggesting that subsurface warming may have played a part in the ice stream's retreat in the past.

 
AdviserAnne E. Jennings
SchoolUNIVERSITY OF COLORADO AT BOULDER
SourceMAI/ 49-03, p. , Jan 2011
Source TypeThesis
SubjectsPaleoclimate science
Publication Number1487923
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