Hexi corridor climate

Cold wave weather often forms in Hexi Corridor in winter and spring. The main source of summer precipitation is the summer monsoon invading this area. The climate is dry, hot and cold change dramatically, windy and sandy. From east to west, the annual precipitation is decreasing and the dryness is increasing. For example, the annual precipitation in Wuwei 158.4 mm, Dunhuang 36.8mm；; The dryness of Jiuquan is 4 ~ 8 in the east and 8 ~ 24 in the west. Precipitation changes greatly every year. Precipitation in summer accounts for 50-60% of the annual total, spring15-25%, autumn10-25% and winter 3-16%. There are fewer clouds and more sunshine hours, 3000 hours in most areas and 3336 hours in Dunhuang in the west. The annual average temperature is 5.8 ~ 9.3℃, but the absolute maximum temperature can reach 42.8℃ and the absolute minimum temperature is -29.3℃, with a difference of more than 72.65438 0℃. The average temperature difference between day and night is about 65438 05℃, and there are four seasons in a day. The number of sandstorm days in Minqin is more than 50 days, while the number of gale days above magnitude 8 in Anxi is 80 days a year, which is called "wind warehouse". The wind in the corridor is changeable. Wuwei and Minqin areas are dominated by northwest wind; Yumen, Anxi, Dunhuang and other places west of Jiayuguan are dominated by northeast wind and east wind.

Climate The climate of Hexi Corridor belongs to continental arid climate. Although there is little precipitation (the annual precipitation is only about 200mm), other climatic conditions for developing agriculture are still very favorable.

The local clouds are scarce and the sunshine time is long. The annual sunshine can reach 2550 ~ 3500 hours, which is rich in light resources and is very beneficial to the growth and development of crops. Because it is located in the mid-latitude zone, and the altitude is high, the heat is insufficient, but the temperature is high in the growing season of crops, which is beneficial to the accumulation of substances in crops, especially suitable for the accumulation of sugar in fruits and vegetables.