Statistical characteristics and mechanisms of mesoscale eddies in the North Indian Ocean

作     者：Chunjian Sun Xidong Wang Anmin Zhang Lianxin Zhang Caixia Shao Guosong Wang Chunjian Sun;Xidong Wang;Anmin Zhang;Lianxin Zhang;Caixia Shao;Guosong Wang

作者机构：School of Marine Science and TechnologyTianjin UniversityTianjin300072China National Marine Data and Information ServiceTianjin300171China College of OceanographyHohai UniversityNanjing210098China 

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

年 卷 期：2022年第41卷第5期

页      面：27-40页

核心收录：

学科分类：0710[理学-生物学] 0908[农学-水产] 07[理学] 0707[理学-海洋科学] 

基　　金：The National Key Research and Development Program of China under contract No.2019YFC1510000 the National Natural Science Foundation of China under contract Nos 41976019 and 41906009 

主　　题：mesoscale eddy eddy characteristics North Indian Ocean satellite altimeter 

摘      要：The statistical characteristics and mechanisms of mesoscale eddies in the North Indian Ocean are investigated by adopting multi-sensor satellite data from 1993 to *** the Arabian Sea(AS),seasonal variation of eddy characteristics is remarkable,while the intraseasonal variability caused by planetary waves is crucial in the Bay of Bengal(BOB).Seasonal variation of the eddy kinetic energy(EKE)is distinct along the west boundary of AS,especially in the Somali Current *** the BOB,larger EKE occurs at the northwest basin from March to May,to the east of Sri Lanka from June to September,and along the east coast of India from November to *** wind stress work(WW)is further studied to figure out the direct influence of wind forcing on *** WW exerts positive effects on EKE along the west boundary of AS and in the south of India/Sri Lanka during the two monsoon ***,the WW also has impact on EKE along the east coast of India in November and ***,we investigate the characteristics and the driving mechanisms of long lifespan *** the AS,long lifespan anti-cyclonic eddies(AEs)mainly generate in the Socotra,the West Indian Coastal Current and the East Arabian Current regions,while cyclonic eddies(CEs)are concentrated in the northwest *** the BOB,long lifespan AEs mostly form near the west of Myanmar,while CEs are accumulated at the north and northwest *** instabilities caused by Rossby waves,coastal Kelvin waves,seasonal currents,together with wind stress forcing exert enormous efforts on the generation and evolution of these eddies.