*CHEN Changsheng¹、ZHANG Yu¹、PROSHUTINSKY Andrey²、BEARDSLEY Robert²、LAI Zhigang³、GAO Guoping⁴ (1.School of Marine Science, University of Massachusetts, USA、2.Department of Physical Oceanography, Woods Hole Oceanographic Institution, USA、3.School of Marine Sciences, Sun Yet-Sen University, China、4.International Center for Marine Studies, Shanghai Ocean University, China)