Traditional Culture Encyclopedia - Weather forecast - What natural disasters will be caused by indiscriminate felling of trees?
What natural disasters will be caused by indiscriminate felling of trees?
The occurrence of sandstorm is not only the product of specific natural environmental conditions, but also has a corresponding relationship with human activities. Man-made overgrazing, deforestation, industrial and mining traffic construction, especially man-made over-reclamation, destroyed the ground vegetation, disturbed the ground structure, formed a large area of sandy land, and directly accelerated the formation and development of sandstorms.
Natural conditions:
The weather situation favorable to strong winds or strong winds, favorable distribution of dust sources and favorable air instability conditions are the main reasons for the formation of sandstorms or strong sandstorms. Strong wind is the driving force of sandstorm, and the source of sandstorm is the material basis of sandstorm. Unstable thermal conditions are conducive to the increase of wind power and the development of strong convection, thus carrying more dust and winding it higher.
National standards for extended data:
1, yellow warning of sandstorm.
Standard: sandstorm weather may occur within 12 hours (visibility is less than 1000 meters), or sandstorm weather has occurred and may occur and may continue.
2. Orange warning of sandstorm.
Standard: Strong sandstorm weather may occur within 6 hours (visibility is less than 500 meters), or sandstorm weather has appeared and may appear and may continue.
3. Red warning of sandstorm.
Standard: Extreme sandstorm weather may occur within 6 hours (visibility is less than 50 meters), or sandstorm weather has occurred and may occur and may continue.
Baidu encyclopedia-sandstorm
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