Abstract:

Based on monthly average reanalysis data from NCEP/NCAR and monthly precipitation data at 124 weather stations in Yunnan region from 1961 to 2012, relationships between the South Asian High (SAH) and precipitation in summer in Yunnan were analyzed using a correlation analysis method. The results show that relationship between summer precipitation in the southwest of Yunnan region and longitude of SAH main center is a significant negative correlation from 1961 to 2012, so is between precipitation in the south of Yunnan region and areas of SAH. In June, precipitation in the northwest and south of Yunnan region is significantly positive correlated to positions of SAH ridge line as well as main center latitude; precipitation in the southwest of Yunnan region is a significantly positive correlation with SAH main central intensity and a significant negative correlation with SAH main center longitude; precipitation in the middle of Yunnan region is a positive correlation with SAH main center latitude. In July, relationship between precipitation in the southwest of northwestern and southwestern Yunnan region and in the south of study area and SAH ridge line location is positive, while it is negative between precipitation in the west of Yunnan region and SAH main center intensity and between precipitation in the middle and east of Yunnan region and SAH main center longitude. In August, precipitation in the south, east and center of Yunnan region is significantly negative correlated to SAH area.

Key words: South Asian High, Precipitation, Correlation Analysis