Volume 9 Issue 2
Apr.  2016
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Wen-yan Zhang, Zheng Gong, Chang-kuan Zhang, Wei Tan. 2016: Response of nearshore circulation outside Yangtze Estuary to El Niño events. Water Science and Engineering, 9(2): 145-154. doi: 10.1016/j.wse.2016.02.004
Citation: Wen-yan Zhang, Zheng Gong, Chang-kuan Zhang, Wei Tan. 2016: Response of nearshore circulation outside Yangtze Estuary to El Niño events. Water Science and Engineering, 9(2): 145-154. doi: 10.1016/j.wse.2016.02.004
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Response of nearshore circulation outside Yangtze Estuary to El Niño events

doi: 10.1016/j.wse.2016.02.004

  • a State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University,  Nanjing 210098, China

  • b CCCC Third Harbor Consultants Co., Ltd., Shanghai 210030, China

  • c Jiangsu Key Laboratory of Coast Ocean Resources Development and Environment Security, Hohai University,  Nanjing 210098, China

Funds:  This work was supported by the National Natural Science Foundation of China (Grant No. 51379003), the Fundamental Research Funds for the Central Universities (Grant No. 2015B15814), and the Program for New Century Excellent Talents in University (Grants No. NCET-12-0841).
More Information
  • Corresponding author: Zheng Gong
  • Received Date: 2015-03-21
  • Rev Recd Date: 2015-09-07
    Abstract
  • With consideration of the comprehensive effects of runoff from the Yangtze River, East China Sea background circulation, and tidal currents, a regional circulation model, including the Yangtze Estuary, Hangzhou Bay, and adjacent sea areas was established. The 2002/2003 El Niño event was chosen for study of the anomalies of circulation outside the Yangtze Estuary. The coastal and ocean current systems of the East China Sea and the current structure outside the Yangtze Estuary were accurately described. The results of vertical circulation analysis basically coincide with those of horizontal circulation analysis, showing that the circulation outside the Yangtze Estuary is mainly affected by the Taiwan warm current, runoff from the Yangtze Estuary, and the tide-induced residual current. The El Niño event weakens Yangtze Estuary circulation to a certain degree, and the impacts are more significant in summer than in winter. During the 2002/2003 El Niño event, the flux of the Taiwan warm current decreases, and the northward component of the Taiwan warm current decreases by half in February 2003 compared to the previous year. However, its path is relatively stable.

     

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