Interannual variability in the Mindanao Eddy and its impact on thermohaline structure pattern

作     者：ZHANG Qilong ZHOU Hui LIU Hongwei 

作者机构：Institute of OceanologyChinese Academy of SciencesQingdao 266071China Key Laboratory of Ocean Circulation and Waves(KLOCAW)Chinese Academy of Sciences Qingdao 266071China University of Chinese Academy of ScienceBeijing 100049China University of Chinese Academy of ScienceBeijing 100049China 

出 版 物：《Acta Oceanologica Sinica》 (海洋学报（英文版）)

年 卷 期：2012年第31卷第6期

页      面：56-65页

核心收录：

学科分类：07[理学] 0707[理学-海洋科学] 070601[理学-气象学] 0706[理学-大气科学] 

基　　金：The National Basic Research Program of China "973" project under contract No. 2007CB816002 the innovative key project of Chinese Academy of Sciences under contract Nos KZCXZ-YW-201 and KZCX2-YW-Q11-02 the Fund of Key Laboratory of Global Change and Marine-Atmospheric Chemistry,SOA under contract No.GCMAC2010 

主　　题：the Mindanao Eddy interannual variability thermohaline structure ENSO 

摘      要：The major feature, interannual variability and variation cause of the Mindanao Eddy and its im- pact on the thermohaline structure are analyzed based on the Argo profiling float data, the history observed data and the SODA data. The analysis results show that the Mindanao Eddy is a per- manent cyclonic meso-scale eddy and spreads vertically from about 500 m depth upward do about 50 m depth. In addition to its strong seasonal variability, the Mindanao Eddy displays a remark- able interannual variability associated with ENSO. It strengthens and expands eastward during E1 Nifio while it weakens and retreats westward during La Nifia. The interannual variability in the Mindanao Eddy may be caused by the North Equatorial Counter Current, the North Equatorial Current, the Mindanao Current and the Indonesian Through Flow. The eddy variability can have a great influence on the thermohaline structure pattern in the local upper ocean. When the eddy is strong, the cold and low salinity water inside the eddy moves violently upward from deep layer, the thermoeline depth greatly shoals, and the subsurface high salinity water largely decreases ,with the upper mixed layer becoming thinner, and vice versa.