What radiation increases in foggy days?

Hazy weather, atmospheric inverse radiation increases at night.

When there is smog weather, the concentration of particulate matter in the air increases, and the weakening effect of the atmosphere on solar radiation increases during the day, resulting in a small part of solar radiation being absorbed by the ground, so the atmosphere near the ground absorbs less solar radiation than when there is no smog weather, and finally the reverse radiation of the atmosphere increases at night.

The atmosphere radiates energy by its own temperature, which is atmospheric radiation. A small part of atmospheric radiation rises and disappears in space; Most of the rest descends back to the ground (especially when the clouds in the atmosphere are thick or the water vapor content is high), and this part of reflection is atmospheric inverse radiation. The intensity of atmospheric inverse radiation mainly depends on the vertical distribution of atmospheric temperature and humidity, and is closely related to cloud conditions, but there is no obvious diurnal variation.

Brief introduction of haze weather:

Haze, as its name implies, is fog and haze. But there is a big difference between fog and haze. The aerosol system composed of dust, sulfuric acid, nitric acid and other particles in the air causes visual impairment, which is called smog. Haze is haze.

Fog is an aerosol system consisting of a large number of tiny water droplets or ice crystals suspended in the air near the ground. It mostly occurs in autumn and winter (which is also one of the reasons for the large-scale haze weather in China in June 20 13), and it is the product of water vapor condensation (or condensation) in the near-surface air. The existence of fog will reduce air transparency and worsen visibility. If the horizontal visibility of the target drops below 1000 meters, the weather phenomenon of water vapor condensation (or condensation) suspended in the air near the ground is called fog.

Haze weather is a state of air pollution, and smog is a general term for all kinds of suspended particles in the atmosphere, especially PM2.5 (particles with aerodynamic equivalent diameter less than or equal to 2.5 microns) is considered as the "culprit" causing haze weather. With the deterioration of air quality, cloudy days are increasing and the harm is increasing. In many areas of our country, the smog weather phenomenon is combined with fog as an early warning and forecast of disastrous weather. Collectively referred to as "haze weather".