Weather in Beijing 20 14

① The temperature near the ground is high, the atmosphere rises, and the convection movement is strong; When the temperature is low, the atmospheric convection is weak, pollutants are not easy to spread, and it is easy to form haze weather, so yes;

② The temperature is low at night, the atmosphere is not easy to rise, and the convective movement is weak, which is not conducive to the condensation of water vapor, and the precipitation is less, which does not meet the question;

(3) When it turns cloudy, the temperature near the ground is low during the day, the convection movement is weak, and the horizontal movement of the atmosphere is weak, so the wind speed is small, which is not conducive to the diffusion of pollutants and is easy to form haze weather, so it is correct;

The stem of the question is the meteorological condition for the formation of smog, while the serious air pollution is not a meteorological condition, which does not meet the meaning of the question.

On the whole, ① ③ is correct.

So choose: C.