Traditional Culture Encyclopedia - Weather forecast - Scientifically explore why there are more and more sandstorms in recent years.
Scientifically explore why there are more and more sandstorms in recent years.
The two biggest sources of sandstorms in China are Hexi Corridor in Gansu and Alashan League in Inner Mongolia. The desertification in these two areas is very serious, and the dust on the surface is very rich. Speaking of desertification, there are four types of desertification in China: wind erosion desertification, water erosion desertification, freeze-thaw desertification and soil salinization. Among them, wind erosion and desertification have the largest area and the widest distribution, and the two areas mentioned above belong to this type. The so-called wind erosion means that when the wind passes through dry and loose soil, it will scrape off a surface layer. This long-term process can be described as "scraping three feet." The final result of wind erosion and desertification is the formation of Gobi and desert, and a large area of quicksand is gradually produced on the ground, which is easily taken away by the wind. From April to May every year, violent atmospheric circulation activities can produce strong winds of magnitude 8 or above. For northern China, it is a common cold air transit in spring, when the wind speed can reach 25 meters per second. Such a strong wind blows the dust away from the ground and brings it to us from the remote Gobi desert area with dry climate and sparse vegetation, forming a sandstorm.
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