On flow in Northwestern Gulf of Alaska,May 1972 |
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| Authors: | Felix Favorite W James Ingraham Jr |
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| Institution: | (1) National Marine Fisheries Service, Northwest and Alaska Fisheries Center, 2725 Montlake Boulevard East, 98112 Seattle, Washington, USA |
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| Abstract: | Southwestward volume transport (referred to 1,500 db) out of the Gulf of Alaska seaward of the continental shelf in May 1972 was 12.5 Sv, and nearly 3/4 of this flow occurred within 50 km of the shelf edge. Mean geostrophic velocities of about 50 cm s–1 occurred in a band 20 km wide, which extended 500 km along the shelf edge; a maximum velocity of 98 cm s–1 (nearly 2 knots) was obtained. Bottom flow along the inshore part of the shelf as determined by seabed drifters was generally onshore at 0.5 cm s–1. Evidence is presented of a large cyclonic gyre on the shelf encompassing the Portlock and Albatross Banks, perturbations in surface flow along the shelf edge, and relations between coastal tidal heights and fluctuations in geopotential topography at the shelf edge. |
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