Using the NCEP/NCAR reanalysis data,the CPC(Climate Prediction Center) monthly SST data of the Nino3 region as well as the ERSST data by NOAA during 1951—2002,the relation and its interdecadal change of the ENSO and the summer rain pattern of eastern China was studied.Results show:The response of the summer rain pattern of eastern China to ENSO abruptly changed in 1978.Before 1977,the correlation between them denotes weakly negative.After the abrupt change,it turned to significantly positive.Moreover,the sl...