1998年4～7月南海环流结构及其演变特点的初步分析  

Preliminary analysis of the circulation structure and itsevolution features in South China Sea during April～July, 1998

作　　者：詹华平[1] 潘玉球[2] 许建平[2] 

机构地区：[1]国家海洋局南海分局,广东广州510300 [2]国家海洋局第二海洋研究所,浙江杭州310012

出　　处：《东海海洋》1999年第4期12-18,共7页Donghai Marine Science

基　　金：南海季风试验资助!(A)

摘　　要：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 mUsing two cruises'CTDdata ofApril～July, 1998, the upperlayercirculation structures and the evolutionalfeatures before and after the South China Sea m onsoon's breaking out w ere analyzed. The distribution of gravity potentialfields, show s that in April～May, three anticycloniccirculations, a cyclonic circulation and a flow from NEto SW existed in theupperlayerwatersofthe South China Sea. Im portantchange ofthecir- culation patternstook placein June～July. In addition, itisfound thatthecirculation evo- lution at500 m is differentfrom thatatsurface or100 m .

关 键 词：重力势 气旋环流 反气旋环流 环流结构 南海 

分 类 号：P731.27[天文地球—海洋科学] P732.6