What are the characteristics of haze weather?

In the horizontal direction, the phenomenon of static wind increases. In recent years, with the rapid development of urban construction, buildings are built higher and higher, and the airflow is obviously weakened by the obstruction and friction when passing through the urban area. The increase of static wind phenomenon is not conducive to the diffusion and dilution of air pollutants, but easy to accumulate in urban and suburban areas.

There is an inversion in the vertical direction. The inversion layer is like a pot cover over a city. This inversion phenomenon that the air temperature at high altitude is higher than that at low altitude limits the vertical movement of the air at low altitude, making it difficult for pollutants to drift to high altitude and be blocked at low altitude and near the ground.

The increase of suspended particles in the air. In recent years, with the growth of urban population and industrial development, the number of motor vehicles has soared, which leads to a large increase in urban pollutant emissions and suspended solids, which directly leads to a decrease in visibility and makes the whole city often look gray.

Thick mist