Climatic Characteristics of Qinghai-Xizang Plateau and Its Surrounding

The relationship between the climatic characteristic over Qinghai-Xizang Palteau and Chinese abnormal climate is studied by using the temperature and precipitation data of 710 stations (72 stations in Qinghai-Xizang Plateau). The results show that the areas of more rain days can be divided into five areas, namely the South China, South China-Southeast of Qinghai-Xizang Plateau, Qinghai-Xizang and West China, and the more rain areas more than 5 rain days in each decad move from east to west of China. The annual precipitation feature in Southeast of Qinghai-Xizang are double peak values, and in Northeast, for single peak value, but there are obvious Plateau rainy period, summer drought and autumn rainfall in Northwest of Qinghai-Xizang Plateau. The analysis of teleconnetion in Linzhi shows that the correlation coefficient between the winter temperature in Linzhi and the one at the same period in Qinghai-Xizang is positive, and the other regions are negative. The correlation coefficient between summer precipitation in Linzhi and the one at the same period in South of Qinghai-Xizang and in the mid-and-lower reaches of Changjiang River is positive, and in North of Qinghai-Xizang Plateau, for negative. The correlation between winter temperature at Linzhi and summer precipitation of regions from Yellow River to Changjiang River is negative.