Northern China will face the biggest sandstorm this year. What caused this bad weather?

According to the latest forecast of the Central Meteorological Observatory, (March 14 to 16), one share? Omnidirectional? Strong cold air will affect China, and 16 provinces and cities may be affected. Among them, heavy snowfall, strong wind cooling and dusty weather in the northern region? Play together? Many places in the northeast are still staged? The next day is like changing seasons? And Huanghuai and other places in North China will experience cooling? Cut in half? Temperature fluctuations will be very obvious.

Wang Tianqi, a meteorologist at China Weather Network, said that tomorrow will be a? Omnidirectional? The breaking of cold air will not only bring obvious precipitation, but also bring obvious gale cooling and dusty weather to the north.

What caused this terrible weather?

The most important way for human beings to discharge gas pollutants is combustion, mainly the combustion of fossil fuels. The sulfur dioxide emitted by human beings is mainly caused by burning coal. Nitrogen oxides mainly come from high-temperature combustion of fuel and exhaust gas emitted by vehicles. Carbon monoxide in the atmosphere is mainly caused by incomplete combustion of fossil fuels and automobile exhaust emissions. Solid pollutants mainly come from transportation, building construction, industrial combustion process and gas particle transformation process such as atmospheric photochemical smog.

After air pollutants are discharged into the atmosphere from pollution sources, they can be transported in different proportions under the action of wind and turbulence. There are many factors affecting the diffusion of pollutants, but meteorological conditions are the main ones. The main meteorological factors affecting air pollution are wind, turbulence, atmospheric stability, temperature stratification, clouds, radiation, weather conditions, underlying surface conditions and other physical and chemical processes. All meteorological conditions conducive to increasing wind speed and turbulence are conducive to the dilution and diffusion of pollutants.

In the high pressure area, the weather is clear and the wind speed is low. Due to the large-scale sinking movement, a sinking inversion layer will be formed at high altitude, which will inhibit the upward turbulent development. If the high-pressure system is stationary or moving slowly, the continuous breeze and inversion conditions for several days will greatly reduce the dilution and diffusion ability of air pollutants. As long as there is enough pollutant discharge, a wider range of pollution hazards will occur. Among the meteorological factors affecting pollutant discharge, wet removal of precipitation may be the fastest and most effective factor to reduce pollutant concentration in the atmosphere.