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《Oceanologia et Limnologia Sinica》 2015-01
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WATER FLUX AND EXCHANGE IN CHANGJIANG RIVER ESTUARY AND ADJACENT WATERS ON COUPLED MODEL OF HYDRODYNAMIC ROMS AND BOX MODEL

WANG Xiao-Hong;YU Zhi-Ming;FAN Wei;SONG Xiu-Xian;CAO Xi-Hua;YUAN Yong-Quan;Key Laboratory of Marine Ecology and Environmental Science, Institute of Oceanology, Chinese Academy of Sciences;University of Chinese Academy of Sciences;College of Environment and Safety Engineering,Qingdao University of Science and Technology;Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences;  
To understand the water flux and water exchange in Changjiang(Yangtze) River estuary in detail, we combined the hydrodynamic model ROMS(regional oceanic modeling system) and the box model. Results show that monsoon controlled the water flux as a whole and transport water in north-south direction. The Taiwan Warm currents played an important role in moving lower waters in spring and summer. The Changjiang River discharge was not mixed with the open seas directly east of 123.5°E, but transported out of the study area across the southern boundary and then to the open seas by ocean current system. Under a strong monsoon, water exchange depended more on the horizontal water flux in the direction of the monsoon in the same layer but between upper and lower layers. Although longer water exchange time coincided with an anoxia event, the decisive cause of anoxia was the spring layer that hindered the exchange between the upper and lower waters.
【Fund】: 国家自然科学基金项目 41121064号 41276116号;; 国家重点基础研究发展计划(973计划) 2010CB428706号
【CateGory Index】: P731.2
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