Dissertation/Thesis Abstract

Mesoscale eddies in the Gulf of Alaska: Observations and implications
by Rovegno, Peter, M.S., University of California, Santa Cruz, 2012, 61; 1532621
Abstract (Summary)

Mesoscale eddies in the Gulf of Alaska are thought to contribute to the shelf-slope exchange of nutrients and plankton, enhancing biological production. We report on a study of two anticyclonic mesoscale eddies in this region observed through in situ sampling during August and September 2007. Both eddies exhibited in their cores theta-S profiles with warmer, fresher water relative to the properties of the ambient basin water between 150 and 300 m depth. Hydrographic properties and satellite altimetry data were analyzed to identify likely formation regions for each feature. One eddy, sampled near Yakutat, Alaska, originated in the Sitka formation region (221–223° E); the second eddy, sampled south of Kodiak Island, originated near the Kenai Peninsula, southeast of the Kennedy and Stevenson entrances to Cook Inlet—an area not previously studied as a formation region. Subsequent analysis of 16 years of satellite altimeter data (from 1992 to 2008) with an algorithm designed to identify and track eddies revealed approximately 6 Kenai eddies that have formed in this region. Although this number constitutes only 3.2% of the 188 eddies identified by the algorithm during this period, it represents 15.4% of the 39 eddies that formed in or propagated westward into the Alaskan Stream.

Indexing (document details)
Advisor: Edwards, Christopher A.
Commitee: Bruland, Kenneth W., Kudela, Raphael
School: University of California, Santa Cruz
Department: Ocean Sciences
School Location: United States -- California
Source: MAI 51/04M(E), Masters Abstracts International
Subjects: Physical oceanography, Remote sensing
Keywords: Alaska, Eddies, Iron limitation, Mesoscale, Satellite altimetry, Sitka
Publication Number: 1532621
ISBN: 978-1-267-88516-6
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