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Study on interaction between the coastal water, shelf water and Kuroshio water in the huanghai Sea and East china Sea

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Acta Oceanologica Sinica 2003年第3期22卷 351-367页

作者： binghuo guo, xiaomin hu,{2., renfeng ge first institute of Oceanography, state oceanic administration, qingdao 2.6061, china state Ocean Adm Inst Oceanog 1 Qingdao 266061 Peoples R China

The main processes of interaction between the coastal water, shelf water and Kuroshio water in the huanghai Sea (HS) and East china Sea (ECS) are analyzed based on the observation and study results in recent years. These processes include the intrusion of the Kuroshio water into the shelf area of the ECS, the entrainment of the shelf water into the Kuroshio, the seasonal process in the southern shelf area of the ECS controlled alternatively by the Taiwan Strait water and the Kuroshio water intruding into the shelf area, the interaction between the Kuroshio branch water, shelf mixed water and modified coastal water in the northeastern ECS, the water-exchan{2. between the HS and ECS and the spread of the Changjiang diluted water.

关键词： huanghai Sea East china Sea coastal water shelf water Kuroshio water interaction

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Role of Kuroshio frontal eddy in exchange between shelf water and Kuroshio water in East china Sea

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Acta Oceanologica Sinica 1997年第1期16卷 1-18页

作者： guo binghuo and {2. renfeng first institute of Oceanography, state oceanic administration, qingdao 2.6003, china first institute of Oceanography State Oceanic Administration Qingdao 266003 China

Basic patterns of the reversal of the Kuroshio water toward the shelf, intrusion of the shelf mixed water into the Kuroshio and uplifting of the near-bottom nutrient-rich water into the upper layer by the pumping of the frontal eddy are analyzed on the basis of satellite infrared images and hydrologic, chemical and biological observations. Results show that the Kuroshio frontal eddies play a very important role in the exchange between the shelf water and the Kuroshio water. The estimation of the average volume transports for three frontal eddy events indicates that the shelf mixed water entrained by an eddy into Kuroshio is 0.44×10~6 m3/s and the reversal Kuroshio water onto the shelf region only 0.04×10~6 m3/s. Along the whole shelf edge, the volume transport of the shelf mixed water entrained by the eddies into the Kuroshio is 1.8×10~6 m3/s. The nutrient (NO3-N) flux pumped to the euphotic zone and input to the continental shelf through a column with 1 m wide is 974 μmol/(s·m) when there is frontal eddy and only 79 μmol/(s·m) in the case of no frontal eddy. Yearly nutrient (NO3-N) flux input to the shelf area caused by the frontal eddy is 1.7×10~5 t/a.

关键词： Kuroshio in the East china Sea frontal eddy water exchange nutrient flux

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

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Acta Oceanologica Sinica 2008年第3期27卷 11-29页

作者： hu xiaomin {2. xuejun QIAO Fangli guo binghuo LIN Xiaopei 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

The muhiyear 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 32. Argos drifters deployed by Chinese institutions and world ocean circulation experiment from 1979 to 2.03. The results show that the Kuroshio surface path adapts well to the western boundary topography and exhibits six great turnings. The branching occurs frequently near anticyclonic 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 winter, 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 °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 anti- cyclonic eddy in fall.

关键词： Kuroshio surface current field satellite-tracked surface drifter seasonal variability

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