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. According to the actual survey data of the environmental resources in the central South China Sea, the effects of the South China Sea sea-air interaction on the drought and flood in Guangdong are discussed.The results show that the heat exchange between the sea and air is very intense in the autumn and winter seasons, the ocean mainly heats the atmosphere and the ocean is the heat source In the spring and summer, the ocean mainly absorbs heat, that is, the atmosphere heats the oceans. When the exchange of heat and air between the autumn and winter seasons intensified (weakened), the precipitation in Guangdong was more (reduced) in the following year.Comparing the precipitation in Guangdong with the wind field in the South China Sea V component) and the evolution of SST over the Xisha area. When the northern winds of autumn and winter in the South China Sea strengthened compared with those of the normal years, the rainfall in Guangdong was less than that in the following year, while in the autumn and winter the intensity of the south wind in the South China Sea was weaker than that in the past. When the SST autumn and winter continued to increase (cool), the precipitation in Guangdong was more (less) in the following year, and the trend of warming (cooling) in the SST continued to be 5 months earlier than that in the pre-flood season in Guangdong Appear around