广西春夏季旱涝与前期500 hPa高度场的关系分析  

Analysis of the Relationship between the Drought and Flood in the Spring and Summer and 500 hPa Height Field in Guangxi

作　　者：蒋丽娟[1] 吴松[1] 

机构地区：[1]广西壮族自治区桂林市气象局,广西桂林541001

出　　处：《安徽农业科学》2010年第4期1905-1907,2167,共4页Journal of Anhui Agricultural Sciences

摘　　要：利用奇异值分解方法,分析了500hPa高度场在广西春季和夏季旱涝年的气候差异,找出了前期500hPa高度场与春夏季旱涝关系密切的关键区。分析结果表明,前一年9月大西洋副高活动区域和波弗特海地区是次年广西春季旱涝的关键区,前一年9月大西洋副高偏强,则次年广西春季偏旱,反之则偏涝;波弗特海地区位势高度大,则次年春季桂北偏涝桂南偏旱,反之则桂北偏旱桂南偏涝;前一年10月东西伯利亚海和大西洋低纬地区是次年广西夏季旱涝的关键区,这两个地区位势高度小,则来年夏季广西少雨,容易造成干旱,反之多雨,易造成洪涝。By using singular value decomposition method,the climatic differences of 500 hPa height field in Guangxi in years with drought and flood in the spring and summer were analyzed.The critical areas with the close correlation between 500 hPa height field and drought and flood in the spring and summer in the early period were found.The results showed that Atlantic subtropical high activity areas and the Beaufort Sea region in September of the previous year were the key areas of drought and flood in the spring of the next year in Guangxi.The stronger Atlantic subtropical high in September of the previous year was,the dryer Guangxi in the spring of next year would become.On the contrary,Guangxi was in the waterlogging.The higher Beaufort Sea region geopotential height was,Northern Guangxi in the next spring tended to flood and the Southern Guangxi tended to drought.On the contrary,northern Guangxi tended to drought and Southern Guangxi tended to flood.East Siberian Sea and the Atlantic region in October in the previous year were the key areas of the drought and flood in Guangxi in the summer in the next year.These two regions geopotential height was small,then Guangxi in the coming summer was drier.On the contrary rainy,flood could be easily caused.

关 键 词：奇异值分解(SVD) 高度场 旱涝 

分 类 号：S166[农业科学—农业气象学]