The Forming and Forecasting of Winter Snow-Disaster Weather in Easten Pastoral-Area of Qinghai-Xizang Plateau

The forming and forecasting analysis of winter snow disaster weather in the easten pastoral area of Qinghai\|Xizang Plateau(1967\_1996) has been made. The main conclusions are as follows: The forming of snow disaster weather situations over the Plateau is closely linked with the large\|scale weather systems, e.g. the Arctic Ocean troughs, the Baikal lake low pressures, the deep troughs of East Asia and the South branch troughs. The two kinds of concept models are sumed up. The quantitative indexes of air unsteady\|waving are mainly discussed in the Plateau, and some of the statistical relations of the low temperature and snowfall are found. Two actual examples of Yushu and Dari stations are provided that how snow disaster forecast are made. Finally, the constructive suggestions of winter snow\|disaster forecast are presented in the area.