Geographical climate of Tonghuo railway

Tonghuo Railway is located at high latitude, with a large plateau area, far away from the ocean, and its edge is blocked by mountains. The climate is dominated by temperate continental monsoon climate. It has the characteristics of less and uneven precipitation, strong wind and drastic changes in cold and summer. The northern part of Daxinganling belongs to the cold temperate continental monsoon climate, and the area west of Bayanhaote-Haibowan-Bayangaole belongs to the temperate continental climate. The general characteristics are sudden temperature rise in spring, windy, short and hot in summer, concentrated precipitation, sudden temperature drop in autumn, frost often comes early, long and cold in winter, and many cold waves. Annual solar radiation increases from northeast to southwest, and precipitation decreases from northeast to southwest. The annual average temperature is 0℃ ~ 8℃, the annual average temperature difference is 34℃ ~ 36℃, and the daily average temperature difference is 12℃ ~ 16℃. The annual total precipitation is 50 ~ 450 mm, with more precipitation in the northeast and less precipitation in the west. The precipitation in the eastern Oroqen Autonomous Banner is 486 mm, the annual precipitation in the Alashan Plateau in the west is less than 50 mm, and that in Ejina Banner is 37 mm The evaporation in most areas is greater than l200, the annual evaporation in Daxing 'anling is less than 1, 200mm, and that in Bayannaoer Plateau is greater than 3,200 mm. Inner Mongolia is abundant in sunshine and light energy resources. The annual sunshine hours in most areas are more than 2,700 hours, and those in the western part of Alashan Plateau are more than 3,400 hours. The annual average number of windy days is 10 ~ 40 days, of which 70% occurs in spring. Among them, Xilingol and Wulanchabu Plateau lasted for more than 50 days; Generally, it takes less than 10 days in the northern mountainous area of Daxinganling. The number of sandstorm days is 5-20 days in most areas, more than 20 days in western Alashan and Ordos Plateau, and the average daily gale of Huluchigute in Ejina Banner of Alashan League is 108 days.