Wind-driven South China Sea deep basin warm-core/cool-core eddies
Abstract
The formation of the South China Sea (SCS) deep basin warm-core and cool-core eddies
was studied numerically using the Princeton Ocean Model (POM) with 20 km horizontal
resolution and 23 sigma levels conforming to a realistic bottom topography. Numerical
integration was divided into pre-experimental and experimental stages. During the preexperimental
stage, we integrated the POM model for three years from zero velocity and
April temperature and salinity climatological fields with climatological monthly mean
wind stresses, restoring type surface salt and heat fluxes, and observational oceanic
inflow/outflow at the open boundaries. During the experimental stage, we integrated the
POM model for another 16 months under three different conditions: one control and two
sensitivity runs (no-wind and no lateral transport). We take the fields of the last 12 months
for analysis. The simulation under control run agrees well with earlier observational
studies on the South China Sea surface thermal variabilities. In addition, the sensitivity
study further confirms that the wind effect is the key factor for generation of the SCS deep
basin warm/cool eddy and that the lateral boundary forcing is the major factor for the
formation of the strong western boundary currents, especially along the southeast
Chinese coast during both summer and winter monsoon seasons.
Description
Journal of Oceanography, Oceanographic Society of Japan, Vol. 54, pp. 347-360.).
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.Collections
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