ENSO循环在夏季的不同位相对东亚夏季风的影响

采用ＳＳＴＡ、风场、ＯＬＲ以及中国１６０站降水、气温等资料，根据赤道中东太平洋ＳＳＴＡ的逐季变化，将ＥＮＳＯ循环过程在夏季的位相分为５种型。对其相应的Ｗａｌｋｅｒ环流的显著性检验发现，Ａ型与Ｃ型夏季的差别最为显著。夏季要素场合成分析发现。Ａ型与Ｃ型的情形差别最明显。Ａ型夏季的要素场与弱夏季风年的相似；Ｃ型夏季的要素场与强夏季风年的相似。

Influence of ENSO cycle at different phases in summer on the east Asian summer monsoon

In terms of global SSTA,wind,OLR data and precipitation,temperature in China,five catalogues are defined of the phases in summer of ENSO cycle based on seasonal SSTA in equatorial central and eastern Pacific.It is found that the difference in Walker circulation is the most significant between Type A ang Type C.Further evidents show that the Walker circulation,the Hadely cell,subtropical high in western Pacific and the east Asian monsoon are week(strong) in summers of Type A(C),with lower(higher) temperature and more(less) rainfall in the reaches of the Yangtze River.