| Using the greater than or equal to 35℃ high temperature events and the observed meteorological data from 1971 to 2005 of Wuwei in east Hexi Corridor, the temporal and abnormal spatial distribution features, continuation, strength and unseasonable synoptic and climatic characteristics of the area are studied in detail.The results show: high temperature mainly occur in the northeast edge of the desert in east Hexi Corridor;high temperature weather chiefly appears in July and August every year;high temperature weather has increased significantly from the late 1990s to today;and strong high temperature occur in the sustained periods of high temperature.With the warming of the climate, the days and the strength of high temperature increase obviously;the days and the strength of high temperature have very close correspondence with drought, the greater the annual drought index is, the higher the temperature becomes, and the more days of high temperature.High temperature occurs in the region of subtropical high control and influence.Based on the analysis of characteristics of the atmospheric circulation of the region, the focus and difficulties of short-term forecasting are discussed. |