Journal
PROGRESS IN OCEANOGRAPHY
Volume 55, Issue 1-2, Pages 65-75Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0079-6611(02)00070-8
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Using satellite altimeter and ship data, Bering Sea cyclonic and anticyclonic eddies were observed in summer 2000 and 2001 to examine their biological, chemical and physical structures. Results from the ship transect revealed the interactions between the physical and biological conditions of Bering Sea eddies. At the center of a cyclonic (anticlockwise) eddy, upwelling was transporting nutrient (NO3 + NO2) rich water (>25 muM) to the surface, which resulted in relatively high chlorophyll a concentrations (>1.0 mg m(-3)) developing under the pycnocline. In contrast, in the center of an anticyclonic (clockwise) eddy there was downwelling. This downwelling of surface warm water was destroying a cold layer (at about 150 m depth) caused by winter convection. However, around the periphery of the anticyclonic eddy the isopycnals were tilted up and nutrient-rich water was being transported along with them up into the euphotic zone, so that high chlorophyll a concentrations were being developed above the pycnocline inside the anticyclonic eddy. (C) 2002 Elsevier Science Ltd. All rights reserved.
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