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

HU Xiao-min; XIONG Xue-jun; QIAO Fang-li; GUO Bing-huo; LIN Xiao-pei

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HU Xiao-min, XIONG Xue-jun, QIAO Fang-li, GUO Bing-huo, LIN Xiao-pei. Surface current field and seasonal variability in the Kuroshio andadjacent regions derived from satellite-tracked drifter data[J]. Haiyang Xuebao, 2008, 30(6): 1-16.

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

1.
College of Physical and Environmental Oceanography, Ocean University of China, Qingdao 266100, China;Key Laboratory of Marine Science and Numerical Modeling, The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
2.
Key Laboratory of Marine Science and Numerical Modeling, The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
3.
College of Physical and Environmental Oceanography, Ocean University of China, Qingdao 266100, China

Received Date: 2007-07-13
Rev Recd Date: 2008-02-13

Abstract

Abstract

The multi-year averaged surface current field and seasonal variability in the Kuroshio and adjacent regions are s udied.The data used in this study are trajectories and (1/4) latitude by (1/4) longitude mean currents derived from 323 Argos drifters deployed by Chinese institutions and World Ocean Circulation Experiment from 1979 to 2003.The results show that the Kuroshio surface path adapts well to the western boundary to pography and exhibits six great turnings.The branching occurs frequently near anticyclonic turnings rather than near cyclonic ones.At 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 appears nearly as straight lines in summer, fall, and winter, when anticy clonic eddies coexiston its rightside; while the path may cyclonically turning in spring when no eddy exists.The Kuroshio intrusion northeast of Taiwan of ten 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 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 arm of an anticyclonic eddy in fall.
- Kuroshio,
- surface current field,
- satellite-tracked surface drifter,
- seasonal variability

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References(39)

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