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利用1998 年组织实施的南海季风实验两个航次的CTD观测资料, 分析了在南海季风爆发前后南海上层环流的结构及其演变特点。从重力势场的分析可知,4～5 月间南海上层水中存在三个反气旋环流、一个气旋环流(内含几个分离的闭合环流) 和一支位于加里曼丹岛和巴拉望岛西北外海的东北—西南向流;6～7 月环流形态发生了较大的变化。南海500 m 层环流的演变不同于表层和100 m 层
Based on the CTD observations of two voyages in the South China Sea monsoon experiment conducted in 1998, the structure and evolution of the SCS in the SCS before and after the onset of the South China Sea monsoon are analyzed. From the analysis of the gravitational potential field, we can see from the May to May there are three anticyclonic circulation, a cyclonic circulation (containing several separated closed circulations) in the upper reaches of the South China Sea and a northwest of Palawan Island The northeast of the sea - southwest flow; June to July the circulation pattern has undergone major changes. The evolution of 500 m layer circulation in the South China Sea is different from the surface layer and 100 m layer