南海海气相互作用对广东旱涝的影响  

Effect of Air-Sea Interaction of the South China Sea on Guangdong's Drought or Excessive Rain

作　　者：吴迪生[1] 詹进源[1] 林晓能[1] 张俊峰[1] 陈惠君[1] 何一金 宋萍萍[1] 蔡扬[1] 王祖渊[1] 邓文珍[2] 

机构地区：[1]国家海洋局南海分局,广州510300 [2]中国广州白云国际机场气象中心技术科研资料室,广州510405

出　　处：《海洋通报》1999年第5期10-16,共7页Marine Science Bulletin

基　　金：国家自然科学基金(课题编号:4965264);广东省自然科学基金(课题编号:940622)

摘　　要：根据南海中部海域环境资源综合调查等实测资料,讨论了南海海气相互作用对广东旱涝的影响.研究结果表明:秋、冬季节海气热量交换非常强烈,海洋主要对大气加热,海洋是热源;春、夏季节海洋主要是吸收热量,即大气对海洋加热.秋、冬季节海气热量交换比常年加强(减弱)时,翌年广东降水偏多(减少).比较广东降水与南海风场(V分量)及西沙SST时空演变规律发现,南海秋、冬季节北风比常年加强时,翌年广东降水偏少,秋、冬季节南海北风减弱南风比常年加强时,翌年广东降水偏多.西沙SST秋、冬季节持续增暖(变冷)时,翌年广东降水偏多(偏少),西沙SST持续增暖(变冷)趋势比广东前汛期偏涝(偏旱)趋势早5个月左右出现.Based on the data collected during the comprehensive investigation of the environmental resources in the middle part of the South China Sea, the paper discusses the effect of the air-sea interaction of the South China Sea on Guangdong' s drought or excessive rain. Research findings indicate that, in autumn and winter, the air-sea heat exchange is intense, so the sea mainly heats the air, thus becoming the heat source while in spring and summer, the sea mainly absorbs heat, i.e., the air heats the sea. When the air-sea heat exchange in autumn and winter becomes stronger (weaker) than that in normal years, the precipitation in Guangdong in the following year will be more (less). It is found from the comparison of Guangdong' s precipitation with the wind field of the South China Sea and the law of the SST space-time variations in Xisha that when the north wind in the South China Sea in autumn and winter is stronger than that in mormal years, the precipitation in Guangdong will be less in the following year and when the north wind is weaker while the south wind is stronger in the South China Sea in autumn and winter than that in normal years, the precipitation in Guangdong will be more in the following year. When the SST in Xisha continues to become warmer (or colder) in autumn and winter, the precipitation in Guangdong will be more ( or less ) in the following year. The tendancy that the SST in Xisha continues to become warmer ( or colder ) occurs five months earlier than the tendancy that Guangdong has drought (or excessive rain) in the pre-flood season.

关 键 词：南海 海气相互作用 广东 旱涝 

分 类 号：P732.6[天文地球—海洋科学] P426.616