Traditional Culture Encyclopedia - Weather forecast - What is the strength of the strong wind and cooling dust coming to Tianjin?
What is the strength of the strong wind and cooling dust coming to Tianjin?
According to the latest weather forecast, due to the strong wind and cooling weather, from 8: 00 on March 22 to 8: 00 on March 23, there will be a large-scale sandstorm weather in Tianjin, and there will be sandstorm weather in the northwest of Tianjin, and the overall air quality will be biased. The air pollution index is above grade 4, and there are many solid inhalable particles in the air. Be sure to pay attention to personal protective measures, especially outdoor workers and outdoor travel.
According to the gale cooling forecast, during the cold air period, from 8: 00 on March 22 to 8: 00 on March 24, the cooling range in most parts of Tianjin reached 6~8℃. Moreover, with strong winds of 4~6 and gusts of 7 ~ 9, people's somatosensory temperature will be lower. You should take preventive measures and bring thick clothes just in case.
Causes of sandstorm formation
Sandstorm is caused by strong wind, intense thermal instability and sand source as dynamic factors and material basis respectively. 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.
Sandstorm refers to the weather phenomenon that strong winds blow up dust on the ground, making the air very turbid and the horizontal visibility less than 1km. Sandstorm is a weather phenomenon in wind erosion and desertification, and its formation is influenced by both natural factors and human activities. Natural factors include strong wind, decreased precipitation and its sand source. Human activity factor refers to the increase of sandstorm frequency after vegetation destruction in the process of economic development.
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