Dust storm is a storm formed by the wind blowing a large amount
of dust and other fine particles into the sky. A large amount
of dust sand is blown up by strong gusts or strong winds, flying
in the air and causing air turbidity, and the horizontal
visibility is less than 1 km. The consequences are endless
flying sand, which has gradually become One of the most
common natural disasters in the world.
Dust storms arise when a gust front or other strong wind
blows loose sand and dirt from a dry surface. Fine particles
are transported into the air and make the air cloudy. It
is one of the major disastrous weather conditions in northern
China. Dust storms are classified into floating dust, blowing
sand, sandstorms, severe sandstorms, and exceptionally strong
Sandstorms, as a kind of wind-sand disaster with high strength, do not happen in
all windy places. Only in areas that are dry with sparse vegetation can dust storms
occur. Dust storms occur mostly in the inland desert regions, mainly in the Sahara
desert, in the the Midwest of North America and Australia. From 1933 to 1937 there
was a famous bowl- shaped sand storm in North America due to severe drought.
Asian sandstorm activities concentrate mainly along the shore in Jordan desert,
Baghdad and Mesopotamia in the northern gulf, Iran's southern coast near Abbas,
and plains from Bailuzhi to the north of Afghanistan. The central Asian region
of the Soviet Uunion, Kazakhstan, Uzbekistan, and Turkmenistan are all areas of
frequent sandstorms, but the center is the sandy plain between the Caspian Sea
and the Aral Sea and Amu River.
In northwest of China, the forest coverage rate
isn’t very high and people who want to make a fortune try to dig the licorice,
fractionation, mining rich and these predatory destructions exacerbate the sandstorm
disasters in this area. Exposed land is easy to be picked up by the wind to form
a sandstorm or even a strong sandstorm.
There are at least 38 kinds of chemical elements in sandstorm and
it greatly increases the solid atmospheric pollutants concentration,
causing long-term potential hazards to the atmospheric environment,
soil, agricultural productions in the area of origin and surrounding
areas. In particular, if the meagre soil is blown away, the barren
land will have a serious impact on crop yields.