The relationship between the surface heating in Tibetan Plateau and spring air temperature in sichuan-chongqing area

Using singular value decomposition (SVD) technique,the relationship of time and space between the surface heating field in Tibetan Plateau and 500hPa geopotential height field of east Asia area as well as the spring air temperature in Sichuan Chongqing area and the cause of abnormal cold and warm is studied.The result shows that: The first modes,derived from the surface heating field in Tibetan Plateau in previous winter with the geopotential height field in next spring represent the main coupling feature between the two fields,and have Significant time space correlations.The surface heating field in Tibetan Plateau in previous winter by influencing the 500hPa geopotential height field in next spring,and influencing the general circulation,is the main factor of abnormal air temperature in spring in Sichuan Chongqing area.