Journal
DYNAMICS OF ATMOSPHERES AND OCEANS
Volume 47, Issue 1-3, Pages 86-113Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.dynatmoce.2008.10.005
Keywords
Two intrusive branches of Kuroshio; Diagnostic modeling with modified inverse method; Volume transport through boundaries and Section in Luzon Strait; Cyclonic and anti-cyclonic eddies; Depth-averaged flow across contours of fH(-1)
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Wind data from NCEP and hydrographic data obtained during 8-27 March 1992 have been used to compute circulation in the Luzon Strait and the northern South China Sea using three-dimensional diagnostic models with a modified inverse method. Numerical results are as follows: the main Kuroshio is located above 800 m levels. It has two intrusive branches of the Kuroshio in the areas above 400 m. One part intrudes anti-cyclonically northwestward, then flows through the area above 200 m southwest of Taiwan and into the Taiwan Strait. The other part intrudes westward and flows cyclonically in the areas north of the cyclonic eddies, then flows southward through the southern boundary of the region. The net westward volume transport (VT) through Section at 120 degrees 15'E between Luzon Island and Taiwan Island is about 3.0 Sv, net northward VT through northern boundaries into the Taiwan Strait is about 1.4Sv and net southward VT through southern boundaries is about 1.6 Sv, which finally flows into the Karimata and Mindoro Straits. In the areas above 400 m east of 117 degrees 15'E, the circulation is mainly dominated by the basin-scale cyclonic gyre, which consists of two cyclonic eddies. However, in the areas below 400 m east of 119 degrees 00'E, the circulation is mainly dominated by basin-scale anti-cyclonic gyre. The joint effect of baroclinity and relief and interaction between wind stress and relief are important in different area respectively for the pattern of the depth-averaged flow across contours of fH(-1). (c) 2008 Elsevier B.V. All rights reserved.
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