Publication:
Analysis of drifting SOFAR buoys in the Greenland Sea, 1989-1990

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Authors
McCarren, David Hilton
Subjects
Greenland Sea
East Greenland Current
Jan Mayen Current
SOFAR floats
Fram Strait
Advisors
Bourke, Robert H.
Gascard, Jean Claude
Date of Issue
1991-12
Date
December 1991
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
In an attempt to gain a better understanding of the intermediate depth circulation of the Greenland Sea,16 SOFAR floats were launched into Fram Strait in 1988 and 1989. Between the fall of 1989 and the summer of 1990, five of these floats were tracked by autonomous listening stations (ALS) positioned to provide tracking in the southern portion of the Greenland Sea. One float (MZ86) provided tracking information for ten months of the ALS deployment period. The other floats provided tracking information ranging from several days to two months. These float tracks delineated the intermediate depth circulation around the Greenland Sea gyre. The MZ86 trajectory exited the Boreas Basin and crossed the Greenland Fracture Zone with a speed of approximately 17 cm s-1. Along the Greenland continental slope the flow increased to 28 cm s- 1 suggesting the presence of a bottom trapped boundary current. Near 74°N the trajectory turned eastward under the shallower warm core of the Jan Mayen Current at 4 cm s-1. This leg closed the Greenland Sea gyre and also shows evidence of interactions with filaments of the Norwegian Atlantic Current (NAC) coming through the Mohns Ridge at these intermediate depths. Two other floats demonstrated tracks which crossed the Mohns Ridge and drifted farther to the east, mixing with the waters of the NAC.
Type
Thesis
Description
Series/Report No
Department
Oceanography
Other Units
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
75 p.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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