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Detailed Reference Information |
Bassin, C.J., Washburn, L., Brzezinski, M. and McPhee-Shaw, E. (2005). Sub-mesoscale coastal eddies observed by high frequency radar: A new mechanism for delivering nutrients to kelp forests in the Southern California Bight. Geophysical Research Letters 32: doi: 10.1029/2005GL023017. issn: 0094-8276. |
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Sub-mesoscale eddies are described along the mainland coast of the Santa Barbara Channel based on observations from a network of high frequency (HF), current-measuring radars and near-shore moorings. The eddies are 4--15 km in diameter and typically last about 2 days, although some last up to 6 days. Most eddies within the radar coverage area are anti-cyclonic with relative vorticities of -0.4 f to -0.8 f where f is the Coriolis parameter, but cyclonic eddies are also observed. Moored observations over the inner shelf (12 m water depth) of a sequence of two eddies in December 2001 show an increase in nitrate plus nitrite from the background levels of 1--2 ¿M to a maximum of 10--12 ¿M when the eddies are present. We speculate that these eddies are an important transport mechanism for nutrients and biogenic particles to inner shelf ecosystems of the Southern California Bight. |
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Abstract |
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Keywords
Oceanography, Physical, Eddies and mesoscale processes, Oceanography, General, Continental shelf and slope processes, Oceanography, Physical, Eastern boundary currents, Oceanography, Biological and Chemical, Nutrients and nutrient cycling (0470, 1050) |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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