南海西南海域中尺度涡传播特征分析OA北大核心CSTPCD

This paper divides the southwestern South China Sea(SCS)into north and south according to the Vietnamese rip current and so on,and tracks the propagation trajectory of mesoscale eddies in the southwestern SCS based on the sea level anomalous satellite altimeter data from January 1,1993 to De-cember 31,2020,and studies the propagation characteristics of mesoscale eddies.The results show that in the northern area,the propagation direction of cyclone eddy is easier to propagate along the isobath,and the anticyclone eddy is more likely to move from deep water to shallow water across the terrain.In the winter half of the year(autumn to spring equinox),there will be more northerly movement of cy-clonic eddy and more southerly movement of anticyclonic eddy,and more northward movement of anti-cyclonic eddy and more southerly movement of cyclonic eddy in the summer half of the year(spring to autumn equinox).The southern region has the most unique propagation path of anticyclonic eddies in the summer half of the year,mainly moving northeast,while cyclonic eddies mainly moving southwest,and the two directions are completely opposite.The research results can provide support for a compre-hensive understanding of the propagation and physical mechanisms of South China Sea eddies.