What is the scientific principle of the poem "Don't go out at sunrise, go to Wan Li Road at sunset"?

Generally speaking, in summer morning, the air at low altitude is stable and there is little dust. If there were red clouds at that time, we called them sunrise. This means that there are many water drops and clouds in the eastern low altitude. As the sun rises, the thermal convection gradually develops to a plane, and the clouds will gradually become dense. So there may be bad weather such as wind and rain. Therefore, if you see a red halo during the day, you'd better try not to go out.

Wan Li at sunset.

At night, due to the sunshine heating in one day, the temperature is high, and there is generally not much water vapor in the low-altitude atmosphere, but due to the weakening of convection, dust may be concentrated in the lower level in large quantities. Therefore, if there is a bright sunset glow, it means that the sunset glow is mainly caused by the scattering of sun light by dry particles such as dust, so if there is a red cloud glow at night, it proves that the weather on the next day is generally good and suitable for travel.

That's why it's called morning glow, not going out, sunset glow, and taking Wan Li Road. This also has certain scientific truth.

reference data

Oriental weather: /news/3633.html