What does the aperture around the moon mean?

The phenomenon of "moon halo" is caused by the refraction of light when moonlight passes through the atmosphere because the atmosphere contains different water vapor. Halo is an optical phenomenon in nature.

It is a colored aperture formed by the refraction of ice crystals when the light of the sun or the moon passes through high and thin white clouds (cirrus, cirrostratus or cirrocumulus), and the color arrangement order is infrared purple. The aperture around the sun is called solar halo, and the aperture around the moon is called lunar halo. The ancients predicted the weather according to the lunar halo very early, and the appearance of "lunar halo" indicates that there will be wind.

Extended data solar halo means rain, and lunar halo means wind.

The appearance of solar halo or lunar halo often indicates that the weather will change to a certain extent. Generally, a solar halo means it may rain, and a lunar halo means it will be windy. Sometimes there is a gap in the lunar halo, and the direction of the gap is the direction of the wind. Therefore, there is a folk proverb: "It rains at night when the sun is dizzy, and it is windy at noon when the moon is dizzy" and "It rains when the moon is dizzy".

It means that the sun is dizzy during the day, it will rain at night, it will be dizzy at night, and it will be windy at noon the next day. When the moon halo appears, there will be wind; When the cornerstone is wet, it will rain. Metaphor can infer what will happen from some signs.

It doesn't rain in cirrostratus itself, but it may rain in the middle and low clouds, and there is a lot of water, so we say,' It rains when the sun is dizzy at night, and the moon is dizzy at noon'. The appearance of "halo" indicates that it will be windy and rainy soon. If you feel dizzy, it may be either windy or rainy. If not, it depends on how the middle and low clouds in cirrostratus develop. ?

If they continue to develop, the clouds will increase and thicken, and it will be windy and rainy. Whether it is "halo" for several days in a row or "halo" for a short time, it depends on the development speed of low and medium clouds after "halo". The development of middle and low clouds moves in quickly, and precipitation comes quickly; If the development is slow, the precipitation will come late; If you don't move in, there will be no precipitation.

People's Daily Online-The spectacle of "Moon Halo" over Putian was originally an optical phenomenon in nature.

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