Through remote sensing detection, it is found that there is a floating dust blowing from the westerly belt at an altitude of more than 2km every 2-3 days from October to march of the next year. When it reaches over the North China Plain, due to the lower terrain and lower wind speed, the floating dust will mix with pollutants downward, and the individual fine particles will increase rapidly after encountering water vapor, It will cause large-scale and high-intensity pollution. If the air flow in the south is relatively strong, it will form heavy pollution weather in North China for many days.
intended to explain what of air pollution in North China?
Formation process