First of all, we need to understand what a solar halo is, which is an atmospheric optical phenomenon. The reason for its formation is that there is a cirrostratus made of ice crystals in the high altitude of 5 meters. After the ice crystals in the cirrostratus are irradiated by the sun, they will undergo physical changes such as refraction and reflection, and the sunlight will be decomposed into red, yellow, green, purple and other colors, so a huge color halo will appear around the sun, called halo.
When there is a cirrostratus composed of ice crystals in the sky, one or more colorful rings with the sun as the center and internal infrared violet often appear around the sun, and sometimes there are many colorful or white light spots and light arcs, which are collectively called ice halos.
Why is it rare? It has something to do with the observation of solar halo. The viewing angles of the radius of solar halo are usually 22 degrees and 46 degrees. (Halos are usually divided into 9, 18, 2, 22, 23, 24, 35, 46 degrees. Among these halos, 22 degrees is the most common, followed by 46 degrees, and others are very rare. ) people can usually observe it with the naked eye? Halo? Phenomenon, the greater the ice crystal content in the clouds, the more obvious the halo, which is easy for people to observe; On the other hand, it cannot be formed? Halo? Or even if it is formed, it cannot be clearly observed on the ground. Therefore, it is not easy to form the halo that we can observe, especially in many provinces this year. It is said that the meteorological conditions in each place, such as weather, temperature and clouds, are indispensable.
From ancient times to the present, there have been many solar halos. Our clever working people in ancient times have summarized many proverbs and verses about the application of this phenomenon. And describe this beautiful phenomenon. The sun is dizzy in the middle of the night, the rain is dizzy, and the moon is dizzy at noon. The sun flail wind, the moon flail rain. Solar halo wind, moon halo rain. The moon is dizzy and the wind is blowing. In the afternoon, the sun is dizzy, and the wind must be prevented. As for poetry, Li Bai, a well-known poet, is indispensable. A poem "Travel in the Day" is perfect. Of course, some proverbs are not accurate now. According to the ancient saying, the solar halo can also be regarded as auspicious. Although I am superstitious, I still expect the country to be rich and strong when I look at the beautiful scenery.