At the evening peak of Beijing-Tianjin-Hebei, strong winds and dust hit. Why is the dusty weather mostly in spring?

Sandstorm struck in the late peak of Beijing-Tianjin-Hebei, and sandstorms occurred frequently in spring, mainly due to the serious desertification in northwest and Inner Mongolia, and the loose surface soil in spring, which could not withstand the wind. Sandstorms are formed when cold air from the south blows up dust on the surface.

Recently, sandstorms in the Beijing-Tianjin-Hebei region have struck again, which has brought inconvenience to people's travel, and everyone has suffered greatly. It has been found that from March to May every year, it is a period of high incidence of dusty weather. The frequent occurrence of dusty weather in spring is closely related to the local environment and climate, as well as the topography.

We know that dusty weather needs sand sources. The sand in the Beijing-Tianjin-Hebei region is scraped from Mongolia, Inner Mongolia and Northwest China. Half of the sandstorms in Mongolia will affect China every year, and some local dust will be brought when passing through the northwest. The dust from the two places will attack the Beijing-Tianjin-Hebei region together, mainly from major deserts such as Taklimakan Desert, Tengger Desert and Wulanbu Desert.

In addition, sandstorms mainly occur in late spring and early summer. This is because the temperature begins to rise in spring, the surface soil thaws, the surface water evaporates quickly, the surface is bare and dry, the climate drought leads to less precipitation, the soil is short of water, the bare soil becomes very loose, and it is easy to raise sandstorms when encountering strong winds. We know that the cold air in the north often goes south in spring, so a lot of dust is swept to the Beijing-Tianjin-Hebei region in the later period. This is the reason why sandstorms are prone to occur in spring, which is mainly affected by climate. If there were no loose soil and strong wind caused by spring drought, there would be no sandstorm. Sandstorm should be a disaster for human beings, and it has also caused harm to human homes. Therefore, it is necessary to plant trees, return farmland to forests, restore surface vegetation coverage, prevent wind and fix sand, reduce land desertification and reduce dust disasters.