ENSO事件对中国东部降水的影响研究

ENSO事件是影响全球气候异常的强信号 ,目前人们就ENSO事件对我国气候影响的研究 ,主要集中在夏季旱涝、台风和东北低温上 ,而在其对气候的季节影响方面研究的较少 .本文主要利用 1915年至 1998年我国东部 36个站点的月降水量等数据资料 ,采用X2 检验的统计方法 ,试图在一个更长的时间序列上来研究我国四季降水与EN SO事件的关系 .统计结果表明 :ENSO事件对中国东部降水的影响随季节、地区的不同而出现不同的特点 .夏季和秋季是ENSO事件与中国季节降水相关较显著的季节 ,其中尤以秋季更为显著 ,华北和华中地区是相关较好的地区 .

Impact of ENSO Events on the Climate in East China

ENSO events contribute to significant weather changes around the world. The impact of ENSO events on China are mainly showed in rainfall in summer,typhoon activities and lower temperature of Northeast China. But the seasonal impact of ENSO events on China is less indicated. In this paper, the relationships between ENSO events and seasonal rainfall in China based on the long time series data of 36 stations from 1915 to 1998 are investigated using X 2 methods. The results show that the impact of ENSO events on China has distinguishing feature with different season and region. The relationship between ENSO events and rainfall are more closely related in summer and autumn, Especially in northern area of East China and central section of East China. So the impacts of ENSO events are more important factors to Chinese climates.