What makes the sky clean and bright after a gust of wind?

After a gust of wind, the cloudy sky became clean and bright.

It will really become clean and bright after a gust of wind. Especially in foggy days, there is no wind and the air pressure is low. The sky will get dirty, the PM index will rise, and the human body will feel uncomfortable and prone to respiratory diseases. After a gust of wind, the foggy weather was blown away. In summer, the sky will become clear and clean, and the body will become light and refreshing. Advocate low-carbon life and protect our planet.

There is a negative correlation between wind and the number of haze occurrences.

In other words, the greater the wind speed, the less the number of haze weather. Wind has two main effects on smog. The first is horizontal transportation. Driven by wind speed, suspended particles in the atmosphere will be transported to neighboring cities and regions in parallel. Although the air quality in windy cities has improved, the pollutants have not decreased, but moved to another city.

Air pollutants will move with the wind speed and mix with the surrounding clean air, resulting in the reduction of particles with the same volume, thus improving air quality.

Both methods can improve the air quality in cities. The greater the wind speed, the better the air quality. Therefore, when the wind is strong, there are few persistent severe polluted weather, which is also the reason why some cities build ventilation corridors to improve the air.