Abstract: Correlations between precipitation in Shanxi province and the sea surface temperature in the Central and Eastern Equatorial Pacific and the Western Pacific warm pool during mid-summer season (July and August) from 1961 to 2016 were analyzes using precipitation observational data and National Oceanic and Atmospheric Administration (NOAA) extended reconstructed sea surface temperature (SST) data.The results showed that precipitation in Shanxi province has a significant negative correlation with the SST in the Central and Eastern Equatorial Pacific and a positive correlation with the SST in Western Pacific warm pool;such a positive correlation enhances since the late 1970s and the early 1980s with a significance level exceeding 0.05 and is associated with the negative SST anomaly in the Central and Eastern Equatorial Pacific.The SST anomaly in Western Pacific warm pool can influence the atmospheric circulation,positions of monsoon trough and the East Asian monsoon,resulting in the anomaly precipitation in Shanxi province.When the SST anomaly in the Central and Eastern Equatorial Pacific is negative,the positive (negative) SST anomaly in Western Pacific warm pool can cause the Europe-Asian-Pacific (EAP) teleconnection pattern and negative Pacific-Japan (PJ) waves.Subsequently,this makes the monsoon trough move westward and northward (eastward and southward),the Western Pacific Subtropical High move northward (southward),and the monsoon index become smaller (larger),leading to more (less) precipitation in Shanxi province during the mid-summer season.

Key words: Precipitation in mid-summer season, Sea surface temperature, Western Pacific warm pool, Summer monsoon