冬、夏季风转换期间南海南部海区的气象特征

南海南部海区冬、夏季风转换时段主要的天气系统有副热带高压和热带辐合带；冬、夏季风转换的集中时段是5月上旬；气温和海水表层温度最高值时段是5月下旬；各气象要素连续变化规律与冬季风北退和夏季风逐步盛行的阶段性变化较明显；平均日变化幅度小，海水表层温度和气温日变化最高值与最低值时次差异相反，正午时段的气温又比海水表层温度值高。

Meteorological Features of Southern South CHINA Sea Area During Winter and Summer Monsoon Transition Period

Winter and summer monsoon transition period were March third period of ten days to May third period of ten days in the southern south China sea area.The variation of popuration air currunt was winter monsoon weakly to turn north retreat,summer monsoon add strong to proceed northward.The mainly weather systems have subtropical high and tropical belt of convergence.The concentration time of winter monsoon and summer monsoon transition were May third period of ten days.The higher valume time of temperature and sea surface temperature was May third period of ten days.The elements continuous variation laws and stage variation comparate obviously with winter monsoon to turn north retreat and summer monsoon step by step poputar.The mean daily variation rate of rise of fall valume small,daily variation maximum and minimum of the sea surface temperature and air temperatura time differ,air temperature higher than sea surface temperature valume at noon.