What is the cause of geographical inversion caused by ground radiation cooling?

Surface radiation cooling refers to the phenomenon that the surface temperature will naturally decrease on the ground, especially at night, because there is no heating effect of solar radiation.

As for the reasons for geographical inversion, there are mainly several situations:

1. Radiation inversion: On a clear and windless night, the ground radiation is intense, and the near-surface atmosphere cools rapidly, while the upper atmosphere cools slowly, resulting in the inversion phenomenon of upper warming and lower cooling, which is the strongest before dawn and disappears from bottom to top after sunrise. Summer is weak and winter is strong. The inversion in winter in China is mainly this inversion.

2. Advection inversion: Warm air moves horizontally to the cold ground or water surface, and the lower layer of warm air is affected by the cold ground or water surface, and the temperature drops rapidly, while the upper layer is less affected and the temperature drops slowly, forming inversion. Mainly in the mid-latitude coastal areas.

3. Front inversion: Because there is warm air above the front and cold air below, the temperature difference between cold and warm air is significant, so there will be obvious inversion.

4. Terrain inversion: In a mountainous basin or valley, cold air sinks along the hillside at night because of the rapid heat dissipation on the hillside, so that the originally warm air at the bottom of the basin or valley is pushed up by the cold air, forming a vertical air structure with warm upper and cold lower, resulting in inversion.

These are the main factors that cause geographical inversion. Geographical inversion has certain influence on weather, environment and aviation. For example, the weather can lead to foggy weather and sunny days; In terms of environment, it can aggravate air pollution; In aviation, it will cause inconvenience to the take-off and landing of aircraft.