Upwelling Southwest of Iceland Due to Quasi-Geostrophic Flow

Investigation of unusualoceanographic upwelling occurrences southwest of Iceland (64 deg N, 26 deg W) suggests causes due to quasi-geostrophic flow over submarine bathymetry. Complex circulation patterns occur in this region and no predominant pattern has been recognized to account for the upwelling...

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Bibliographic Details
Main Author: Filonczuk, Maria K.
Other Authors: NAVAL ACADEMY ANNAPOLIS MD
Format: Text
Language:English
Published: 1990
Subjects:
Physical and Dynamic Oceanography
Marine Engineering
*UPWELLING
*CORIOLIS EFFECT
*GEOSTROPHIC CURRENTS
IMAGES
PATTERNS
FLOW
MEAN
CONSERVATION
HYDROGRAPHY
SUBMARINES
CIRCULATION
CURRENTS
POTENTIAL FLOW
SUBMARINE CANYONS
SATELLITE PHOTOGRAPHY
ICELAND
CANYONS
BATHYMETRY
VORTICES
POSITION(LOCATION)
WIND
Iceland
Online Access:http://www.dtic.mil/docs/citations/ADA227129
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA227129
Description
Summary:Investigation of unusualoceanographic upwelling occurrences southwest of Iceland (64 deg N, 26 deg W) suggests causes due to quasi-geostrophic flow over submarine bathymetry. Complex circulation patterns occur in this region and no predominant pattern has been recognized to account for the upwelling . Two submarine canyons are located 30 km northeast of the approximate location of the upwelling center. It is postulated that quasi-geostrophic flow over the canyons and a resulting conservation of potential vorticity is the cause of the upwelling. Satellite imagery, hydrographic data, wind patterns, and mean currents all point to a temperature doming. This suggests a persistent bottom- generated feature. Submarine bathymetry appears to play the dominant role in the upwelling.

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