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An Arctic source for the Great Salinity Anomaly - A simulation of the Arctic ice-ocean system for 1955-1975The paper employs a fully prognostic Arctic ice-ocean model to study the interannual variability of sea ice during the period 1955-1975 and to explain the large variability of the ice extent in the Greenland and Iceland seas during the late 1960s. The model is used to test the contention of Aagaard and Carmack (1989) that the Great Salinity Anomaly (GSA) was a consequence of the anomalously large ice export in 1968. The high-latitude ice-ocean circulation changes due to wind field changes are explored. The ice export event of 1968 was the largest in the simulation, being about twice as large as the average and corresponding to 1600 cu km of excess fresh water. The simulations suggest that, besides the above average ice export to the Greenland Sea, there was also fresh water export to support the larger than average ice cover. The model results show the origin of the GSA to be in the Arctic, and support the view that the Arctic may play an active role in climate change.
Document ID
19940033979
Document Type
Reprint (Version printed in journal)
Authors
Hakkinen, Sirpa (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 16, 2013
Publication Date
September 15, 1993
Publication Information
Publication: Journal of Geophysical Research
Volume: 98
Issue: C9
ISSN: 0148-0227
Subject Category
OCEANOGRAPHY
Distribution Limits
Public
Copyright
Other