Variation of Winter Temperature in China and Its Responding to the Anomalies in East Asian Winter Monsoon and Surface Heating Field over Qinghai-Xizang Plateau

Based on the observational data of 618 stations in China,SLP and intensity departure index of surface heating fields over Qinghai-Xizang Plateau,the winter temperature variation and its responding to the anomalies in East Asian winter monsoon and the intensity of surface heating field over Qinghai-Xizang Plateau were studied by EOF and correlation analysis method.The results show that the first EOF spatial made has an identical signal in whole China,the warmest region is Hetao.The second one has a seesaw pattern between northeast and southwest China.The years of persistent higher winter temperature are after 1990′s.It is considered that the temperature increasing of China depends on the intensity of winter monsoon.Negative relation between East Asian winter monsoon and high frequency of El-Nin~o,the most sensitive region responding to East Asian winter monsoon are Hetao and off the east coast of China.The strengthen intensity of surface heating field is favorable for the decreasing winter temperature in south of Xinjiang,Hetao and off the east coast of China.The winter temperature increasing of Southwest China shows later than other parts.