The characteristics of summer precipitation in China from 1981 to 2017 and its relationship with SST and pre?circulation in global were discussed using the NCEP reanalysis data and the monthly mean precipitation data of 160 stations in China based on EOF， Mann?Kendall， wavelet analysis and SVD analysis.The results show that， the first EOF mode of summer precipitation in China had the characteristics of uniform regional and interdecadal changes， the second EOF mode had the characteristics that the northeast in China and the other regions was opposite and had interannual changes.Summer precipitation especially in the Inner Mongolia area from 1981 to 1997 was relatively less than that from 1998 to 2017， while during 2014 -2017 compared with 1998 to 2013， summer rainfall in south of China was more than in north.Summer precipitation in the northern regions and the Yangtze River basin changed suddenly in 1997， while the south’s changed suddenly in 2013 .The north had 26 ~ 30 years， 9 ~11 years and 5 ~ 6 years， the south had 20 ~ 22 years， 12 ~ 13 years， and the Yangtze River Basin had 16 years， 6 ~ 10 years of periodic changes.In the context of interdecadal variation， summer precipitation in China was also interannual variation.SST of the East Pacific in winter was negatively correlated with the Western Pacific Ocean， the India Ocean and the Atlantic and this had interdecadal variation， and that led to a consistent and interdecadal change of the next year’s summer precipitation in China.While SST of the Eastern Pacific， the Indian Ocean， the western Atlantic in winter was inversely correlated with the Western Pacific and the Northeastern Atlantic and this had inter?annual changes， that led to the north?south inversion of the next year’s summer precipitation.SST affected the next year’s summer rainfall by influencing atmospheric circulation such as sea level pressure， 500 hPa height field.Through the continuous observation of the atmospheric circulation in the key area in winter and in spring， it can be used as one of the bases for predicting summer precipitation in the next year.
Qifen LI
,
Zhehong WU
,
Xingju WANG
,
Donghai ZHANG
,
Mei XIAO
. The Characteristics of Summer Precipitation in China since 1981and its Relationship with SST and Pre-circulation[J]. Plateau Meteorology, 2020
, 39(1)
: 58
-67
.
DOI: 10.7522/j.issn.1000-0534.2018.00148
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