Multi-core structure of the Kuroshio in the East China Sea from long-term transect observations

Long-term hydrographic temperature and salinity transect data in the East China Sea from June 1955 to November 2001 are analyzed in order to examine the geostrophic velocity and the structure of the Kuroshio current. The structure of the Kuroshio Current is divided into three basic forms, a single-c...

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Veröffentlicht in:Ocean dynamics 2009-06, Vol.59 (3), p.477-488
Hauptverfasser: Chen, Hong-Xia, Qiao, Fang-Li, Ezer, Tal, Yuan, Ye-Li, Hua, Feng
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container_end_page 488
container_issue 3
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container_title Ocean dynamics
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creator Chen, Hong-Xia
Qiao, Fang-Li
Ezer, Tal
Yuan, Ye-Li
Hua, Feng
description Long-term hydrographic temperature and salinity transect data in the East China Sea from June 1955 to November 2001 are analyzed in order to examine the geostrophic velocity and the structure of the Kuroshio current. The structure of the Kuroshio Current is divided into three basic forms, a single-core structure, a double-core structure and a multi-core structure; the appearance percentage of the three forms are 53.1%, 31.4%, and 15.4%, respectively. The analysis suggests that multi-core structures have significant seasonal and interannual variabilities that are not fully understood but may relate to variations in transport and associated flow instabilities. The Kuroshio's spatial character is also analyzed in detail by applying a simplified model of motion instability into this multi-core structure of the East China Sea Kuroshio. The theoretical results are found to be consistent with the observations, suggesting that the instability of the Kuroshio in the East China Sea may bring forth the formation of the observed multi-core structure.
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subjects Atmospheric Sciences
Creeks & streams
Data analysis
Earth and Environmental Science
Earth Sciences
Flow velocity
Fluid- and Aerodynamics
Geophysics/Geodesy
Marine
Monitoring/Environmental Analysis
Oceanography
Oceans
Studies
title Multi-core structure of the Kuroshio in the East China Sea from long-term transect observations
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