What is the phenomenon of "the sun is dizzy in the middle of the night and the rain is dizzy at noon"?

Lunar halo is a kind of light that is refracted by ice crystals when passing through the cirrostratus at high altitude, so that the seven-color composite light is dispersed into internal infrared purple halo or light arc, and an aperture is generated around the moon.

The meteorological proverb "the moon is dazzled and the wind blows, and the foundation is moist and rainy" refers to the weather change. The original meaning is that when the moonlight shines on the clouds, there will be wind in the gas field; When the cornerstone is wet, it will rain.

Halo can be divided into "small halo" and "big halo". "Small halo" is 22 degrees halo, "big halo" is 46 degrees halo. A small halo is a halo with a luminous body as the center and an angular radius of 22 degrees. The inner ring is reddish, and the outer ring is occasionally purple or white. The sky inside the halo is obviously darker than outside the halo. Large halo is a halo ring with an angular radius of 46 degrees, which is very rare and generally darker than small halo.

Extended data

solar halo

When there is cirrostratus, there are countless ice crystals floating in the sky. Ice crystals in the same circle around the sun can refract the same color light into people's eyes, forming an internal infrared purple halo. When there is a cirrostratus composed of ice crystals in the sky, one or more inner infrared purple colored halos with the sun as the center often appear around the sun, and sometimes there are many colored or white light spots and arcs. These halos, spots and arcs are collectively called ice halos.

Solar halos mostly appear in spring and summer. There is a folk proverb that "it rains in the middle of the night when the sun is dizzy, and it is windy at noon when the moon is dizzy", which means that if there is a solar halo, it will rain in the middle of the night, and if there is a lunar halo, it will be windy at noon the next day. Solar halo can be a precursor of weather change to a certain extent, and it may turn cloudy or rain when it appears.

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