Volume 5 Issue 2
Jun.  2012
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Article Navigation >  Water Science and Engineering  > 2012  >  5(2): 164-174
Jun-cheng ZUO, Qian-qian HE, Chang-lin CHEN, Mei-xiang CHEN, Qing XU. 2012: Sea level variability in East China Sea and its response to ENSO. Water Science and Engineering, 5(2): 164-174. doi: 10.3882/j.issn.1674-2370.2012.02.005
Citation: Jun-cheng ZUO, Qian-qian HE, Chang-lin CHEN, Mei-xiang CHEN, Qing XU. 2012: Sea level variability in East China Sea and its response to ENSO. Water Science and Engineering, 5(2): 164-174. doi: 10.3882/j.issn.1674-2370.2012.02.005
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Sea level variability in East China Sea and its response to ENSO

doi: 10.3882/j.issn.1674-2370.2012.02.005
  • 1.

    College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, P. R. China

  • 2.

    HYDROCHINA Huadong Engineering Corporation, Hangzhou 310014, P. R. China 

  • 3.

    State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, P. R. China

Funds:  the National Basic Research Program of China (973 program, Grant No. 2007CB411807), the National Natural Science Foundation of China(Grants No. 40976006 and 40906002), the National Marine Public Welfare Research Project of China (Grant No. 201005019), and the Project of Key Laboratory of Coastal Disasters and Defense of Ministry of Education of China (Grant No. 200802).
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  • Corresponding author: Qian-qian HE
  • Received Date: 2011-05-23
  • Rev Recd Date: 2011-11-06
    Abstract
  • Sea level variability in the East China Sea (ECS) was examined based primarily on the analysis of TOPEX/Poseidon altimetry data and tide gauge data as well as numerical simulation with the Princeton ocean model (POM). It is concluded that the inter-annual sea level variation in the ECS is negatively correlated with the ENSO index, and that the impact is more apparent in the southern area than in the northern area. Both data analysis and numerical model results also show that the sea level was lower during the typical El Niño period of 1997 to 1998. El Niño also causes the decrease of the annual sea level variation range in the ECS. This phenomenon is especially evident in the southern ECS. The impacts of wind stress and ocean circulation on the sea level variation in the ECS are also discussed in this paper. It is found that the wind stress most strongly affecting the sea level was in the directions of 70º and 20º south of east, respectively, over the northern and southern areas of the ECS. The northwest wind is particularly strong when El Niño occurs, and sea water is transported southeastward, which lowers the sea level in the southern ECS. The sea level variation in the southern ECS is also significantly affected by the strengthening of the Kuroshio. During the strengthening period of the Kuroshio, the sea level in the ECS usually drops, while the sea level rises when the Kuroshio weakens.

     

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