What do you mean by the condition of inversion?

Inversion phenomenon refers to the phenomenon that the temperature near the ground is higher than that at the upper air because of the still air or weak wind in the atmosphere. Under the inversion phenomenon, the atmospheric temperature is upside down, and the vertical temperature difference is very large.

The formation of inversion phenomenon needs certain meteorological conditions. Generally speaking, inversion occurs in sunny days, no wind or breeze, at night or in the morning. In addition, the influence of topography will also have an impact on the formation of inversion. Inversion is common in valleys, plains, cities and other areas.

The phenomenon of inversion will have different effects on the ecological environment and people's lives. First of all, inversion will cause bad meteorological phenomena such as air pollution and haze weather. Secondly, the inversion phenomenon will significantly affect the heat exchange between the ground and the air, resulting in the obstruction of crop growth and the high surface temperature at night in cities. Finally, inversion will also affect aviation, transportation and other industries, because inversion will affect the density of air and the thrust of aircraft, increasing the difficulty and danger of taking off and landing.