In this paper

the influence of the spring soil moisture in the Indo-China Peninsula was analyzed on summer precipitation over the South China Sea and surrounding area by using statistical methods like SVD. The results indicate that there exists obvious positive correlation between soil moisture and summer precipitation over the western Pacific Ocean and negative correlation between soil moisture and summer precipitation over the eastern Indian Ocean. Summer precipitation increased over the western Pacific and decreased over the eastern Indian Ocean when positive (negative) anomaly in soil moisture occurred over the Indo-China Peninsula. When soil moisture anomaly over the Indo-China Peninsula was positive

local evaporation increased

near surface humidity decreased

latent heat flux from ground to atmosphere increased

surface albedo decreased

the absorption of solar shortwave radiation was strengthened

and upward shortwave radiation correspondingly decreased. This resulted in that near surface temperature decreased

sensible heat flux and long-wave radiation decreased

and the sea-land thermal difference reduced

which enhanced the monsoon and caused monsoon to occur earlier. Furthermore

that enhanced the transportation of water vapor from the eastern Indian Ocean to the western Pacific Ocean

and increased the precipitation in the western Pacific. The increase in near surface temperature will lead to the opposite precipitation mode

and vice versa.