南海季风区地域性大气环流的结构

Structure of Regional Atmospheric Circulation in the South China Sea Monsoon Region

作者使用 NCEP/ NCAR再分析资料 ,在热带 30°S～ 30°N纬带用谐波分析方法分离出超长波之后 ,再采用环流诊断方法 ,发现南海季风区存在地域性环流系统。文中给出冬、夏季风期该系统的三维空间结构和相应的热源分布 ,讨论了该地域性环流系统对南海季风气候及其异常的作用 ,并探讨夏季风爆发北部先于南部的一种可能的气候原因。

Based on NCEP/NCAR reanalysis data and harmonic analysis method, extra-long waves have been separated out from the latitudinal zone of 30°S^30°N. The results show that a regional circulation system exists in the monsoon region of the South China Sea (SCS). The 3-dimensional spatial structure and the distribution of heat source of the system revealed in this paper, according to which, the monsoon climate of the SCS and its abnormal effect are discussed. In addition, we explain the reason why the summer monsoon breaks out earlier in the north of the SCS, while later in the south.