Abstract: Based on the 1958-1999 monthly averaged NCEP/NCAR reanalysis data,the REOF analysis is applied to get the main spatial modes of normalized atmospheric heating source over the Tibetan Plateau (TP) in July.Results show that the four leading modes locate over the northeast TP,southwest TP,Kashmir and southeast TP respectively,and the cumulative variances are no more than one third of the total.It denotes that the heating source distribution is very complicated over the TP in July.In other words,it is difficult to depict heating spatial distribution with few modes.By using wavelet analysis,2-4 years variation period is identified in these modes.Moreover,correlation coefficients between each RPC and tonal wind U,meridional wind V,tonal moisture flux,meridional moisture flux,and precipitation rate over East Asia are calculated to construct correlation fields.Results show that different heating modes over the TP correspond to different circulation,vapor flux as well as precipitation patterns.Precipitation over North China (or Kashmir) is negatively (or positively) correlated with REOFl.Similarly,notable negative (or positive) correlation can be found between the rainfall over south part of Southwest China,South China,and Philippine (or Japan) and the REOF3.Due to high localization of diabatic heating over the TP,it is not enough to study the influence of TP thermal forcing on the climate with an area-averaged heating index.