In recent years, smog weather has frequently appeared in China. The following figure shows four forms of smoke diffusion and four cases of vertical distribution of tropospheric atmospheric temperature

In recent years, smog weather has frequently appeared in China. The following figure shows four forms of smoke diffusion and four cases of vertical distribution of tropospheric atmospheric temperature. Find a solution A is the normal atmospheric stratification (temperature versus height), which is beneficial to the vertical convection of the atmosphere and the diffusion of ground pollutants. The corresponding smoke diffusion form is a;

The most unfavorable to the diffusion of smog air pollutants should be inversion stratification, that is, the atmospheric temperature increases with height, which is not conducive to the vertical upper body movement of the atmosphere. So the C diagram in the vertical temperature distribution diagram is this kind of stratification.