What does the solar halo observation in Beijing show?
On April 8, a solar halo appeared in Beijing at about 1 1, lasting about 1.5 hours. The folk proverb says, "It rains in the middle of the night, and it will be windy when the moon is dizzy at noon." Halo appears around the sun because tiny ice crystals in the air refract and reflect sunlight, and these tiny ice crystals are the pioneers of the arrival of rain clouds. Can proverbs be verified? According to the release of the Municipal Meteorological Observatory18 at 6: 00, Beijing turned sunny to cloudy in the daytime and southerly in the north, with the highest temperature of 23℃, sunny to cloudy at night and southerly to northerly winds. The lowest temperature is 65438 02℃. There will be light rain tomorrow. After the rain, the wind increased and the temperature dropped. In addition, April 19 happens to be Grain Rain, the last solar term in spring. Rain gives birth to a hundred grains. If the rainfall is sufficient and timely, cereal crops can thrive.
How to observe the solar halo Don't watch the solar halo with naked eyes for a long time, so as not to burn your eyes.
Solar halo means that solar halo is an atmospheric optical phenomenon, which is formed by the refraction or reflection of ice crystals when sunlight passes through cirrostratus. Generally speaking, a solar halo often indicates that the weather may change.
Conditional solar halo is an atmospheric phenomenon. The reason for its formation is that a cirrostratus composed of ice crystals appeared in the 5000-meter-high sky. The ice crystals in cirrostratus will undergo physical changes such as refraction and reflection after being irradiated by the sun, and the sunlight will be decomposed into red, yellow, green, purple and other colors, thus a huge colorful halo will appear around the sun, which is called solar halo. In the winter sky, there will be some water vapor. Due to the low temperature, cirrocumulus or cirrostratus will be formed. This cloud, which contains a lot of water vapor, forms hexagonal small ice crystals because it freezes when it is cold. The magic sun appeared because ice crystals turned into countless small mirrors at the symmetrical points on both sides of the solar halo. These small mirrors reflect sunlight one by one, which looks particularly bright, and then there will be more than two virtual images of the sun, which is the strange "magic sun." If the weather conditions are right, we can see more than a dozen magical days.
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