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Surface current field and seasonal variability in the Kuroshio and adjacent regions derived from satellite-tracked drifter data

Surface current field and seasonal variability in the Kuroshio and adjacent regions derived from satellite-tracked drifter data

doi:
10.3969/j.issn.0253-505X.2008.03.003
Abstract:
The multiyear averaged surface current field and seasonal variability in the Kuroshio and adjacent regions are studied. The data used are trajectories and (1/4)° latitude by (1/4)° longitude mean currents derived from 323 Argos drifters deployed by Chi-nese institutions and world ocean circulation experiment from 1979 to 2003. The results show that the Kuroshio surface pathadapts well to the western boundary topography and exhibits six great turnings. The branching occurs frequently near anticyclon-ic turnings rather than near cyclonic ones. In the Luzon Strait, the surface water intrusion into the South China Sea occurs only in fall and winter. The Kuroshio surface path east of Taiwan, China appears nearly as straight lines in summer, fall, and win-ter, when anticyclonic eddies coexist on its right side; while the path may cyclonically turning in spring when no eddy exists. The Kuroshio intrusion northeast of Taiwan often occurs in fall and winter, but not in summer. The running direction, width and velocity of the middle segment of the Kuroshio surface currents in the East China Sea vary seasonally. The northward intrusion of the Kuroshio surface water southwest of Kyushu occurs in spring and fall, but not in summer. The northmost position of the Kuroshio surface path southwest of Kyushu occurs in fall, but never goes beyond 31 o N. The northward surface current east of the Ryukyu Islands exists only along Okinawa--Amami Islands from spring to fall. In particular, it appears as an ann of an anti-cyclonic eddy in fall.
作者
Author: HU Xiaomin[1] XIONG Xuejun[2] QIAO Fangli[2] GUO Binghuo[2] LIN Xiaopei[3]
作者单位
  1. College of Physcial and Environmental Oceanography, Ocean University of China, Qingdao 266003, China;Key Laboratory of Marine Science and Numerical Modeling of State Oceanic Administration, First Institute of Oceanography,State Oceanic Administration, Qingdao 266061,China
  2. Key Laboratory of Marine Science and Numerical Modeling of State Oceanic Administration, First Institute of Oceanography,State Oceanic Administration, Qingdao 266061, China
  3. College of Physcial and Environmental Oceanography, Ocean University of China, Qingdao 266003, China
期 刊: 海洋学报(英文版) ISTIC EI SCI PKU CSSCI
Journal: ACTA OCEANOLOGICA SINICA
年,卷(期) 2008, 27(3)
分类号 P7
Keywords: Kuroshio 知识脉络 surface current field 知识脉络 satellite-tracked surface drifter 知识脉络 seasonal variability 知识脉络
机标分类号 P7 P4
基金项目 国家自然科学基金
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