How to observe the sky and check the weather

This multi-day brilliant phenomenon actually belongs to the category of solar halo, which can be divided into solar halo and lunar halo. There will be a halo, which is called halo in meteorology, and sometimes there will be bright spots on both sides of the halo. When we ordinary people observe, we will feel that there is such a light spot on the top, bottom, left and right, which is collectively called the same glow for several days in a row, or the same glow on the 4 th, 3 rd and 5 th.

The phenomenon of solar halo is very rare, which has aroused great interest. In fact, the halo phenomenon is somewhat similar to the common rainbow phenomenon in our daily life. Rainbow is because there are still many raindrops in the sky after heavy rain. These raindrops are like small prisms. After the sunlight is decomposed by prism, it becomes seven colors: red, orange, yellow, green, cyan, blue and purple, forming a rainbow. Solar halo is caused by refraction of columnar ice crystals. Besides solar halo, moonlight can also form lunar halo. Here are some photos of solar halo taken by photographers. You can see that the solar halo is red inside and purple outside, which is very beautiful.

Solar halo is an astronomical phenomenon, which is caused by the cirrostratus composed of ice crystals at an altitude of 5000 meters. The ice crystals in cirrostratus will undergo physical changes such as refraction and reflection after being irradiated by the sun, which will decompose the sun into red, yellow, green, purple and other colors, thus a huge colorful halo will appear around the sun, which is called solar halo.

Yuan Tao, Observation Section of Daqing Meteorological Bureau: There is some water vapor in the sky in winter. In winter, due to the low temperature, there is a lot of water vapor in the clouds under cirrocumulus or cirrostratus. Because of freezing, such small hexagonal ice crystals are formed.

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 makes them particularly bright, so there will be several virtual images of the sun, which is the strange "magic sun". If the weather conditions are right, we can sometimes see a magic sun at the sun's symmetrical point, and then five "suns" will appear in the sky.

Yuan Tao, Observation Section of Daqing Meteorological Bureau: The so-called multi-day glow weather phenomenon is very bad. First of all, there must be an appropriate amount of clouds in the sky, because such clouds are the material carriers that produce multi-day glow phenomena. Too few clouds can't form. If there are too many clouds, the light can be directly absorbed by the clouds, so it can't be photographed on the ground. The second condition is that there must be enough water vapor and a large number of ice crystals in the air. Ice crystals are generally hexagonal to produce light refraction. The other is that the demand for wind is relatively small and the atmosphere is relatively stable. Otherwise, regular ice crystals will be disturbed and regular light refraction will not be formed.

However, meteorologists are puzzled by the harsh conditions of solar halo formation. From 65438 to 0957, there were meteorological data in Daqing City, which showed that there had never been such a celestial phenomenon.

Yuan Tao, Observation Section of Meteorological Bureau of Anniversary Celebration: Because Anniversary Celebration is a region with nine droughts in ten years, it is basically dry every year. Moreover, the conditions of this weather phenomenon are very harsh, and there must be enough water vapor.

On the nights of March 2 and March 3, this weather phenomenon was basically met. The wind is a breeze, and the water vapor content of the day is basically 40% to 60% and 70%, so the water vapor content is relatively high. It is very rare in Daqing area, so this weather phenomenon is formed.

So, what will the sudden appearance of a rare solar halo in Daqing bring? Will it really herald an earthquake or a crack in the sky, as everyone guessed? Will the ancient legendary scenes reappear in Daqing? The citizens kept calling the Daqing Meteorological Bureau to find out the situation.

Daqing Meteorological Bureau: This phenomenon is normal. This phenomenon is called magic day. Thank you for your attention.

Moreover, many citizens told meteorologists that in some places in Daqing, four suns can be seen, while in other places, only two suns and three suns can be seen. Why on earth is this? Is it because the air in Daqing is polluted, and there are fewer times of the sun in places with serious pollution?

Citizen 1: I see two suns, about two.

Citizen 2: Three, definitely three.

Newspaper reporter: Is there air pollution in this situation? Because Daqing is an industrial city with many chemical and oil refining enterprises, they think it has a great impact on the environment.

Experts pointed out that in fact, the air quality in Daqing is still very good, not because the air in Daqing has deteriorated, so the number of suns varies from place to place.

Expert: Sometimes we see two days of brightness, three days of brightness, four days of brightness and five days of brightness. Usually five days of brightness. This is mainly because the position of our observer is different from that of the halo. Generally, when the sun still forms a halo and there are observation points, these three points are roughly on a straight line, so the observed bright spots are the most favorable and the most.

In order to explain the problem that the number of suns is different from different angles, let's do an experiment. From this angle, you can see the virtual images of two suns. If you look at it from another angle, you can form virtual images of three suns. Therefore, we see different landscapes from different observation angles.

From 7: 00 am to 9: 00 am, the solar halo process in Daqing City lasted for about 2 hours. The sky has returned to its former scene, and the magic day in the sky has gradually disappeared.

Meteorological Bureau staff: As this meteorological condition gradually disappears, this phenomenon will naturally dissipate.

Master Yu, a citizen of Daqing: I went out around 6: 50, and when we were observing outside around 9: 30, this phenomenon gradually disappeared, because the sun rose gradually and disappeared when it rose.

However, since the phenomenon of solar halo appeared on March 3, Daqing City suffered from windy weather and even sandstorms for three consecutive days on March 4, 5 and 6. In March 10, the temperature in Chun Xue, Daqing actually began to drop, and the temperature dropped by 10 degrees. Citizens can't help but think of four days of happiness. Is this an anomaly caused by a magical day? Will there be a snowstorm or flood after Daqing? Everyone who has regained calm is worried again.

Citizen: It has caused people a panic, and this panic has been going on. Especially after this weather phenomenon, citizens have caused considerable panic.

Experts from Daqing Meteorological Bureau have long expected this sudden gale and cooling weather. They think this is a normal weather change.

Daqing Meteorological Bureau: This phenomenon generally appears in cirrostratus, cirrostratus is generally on the windy side, and cirrostratus is generally in front of the windy side. So after this phenomenon occurs in cirrostratus, there may be cold air or warm air behind it. Generally speaking, with the cross-border of cold air and warm air, there will be some strong winds, precipitation and other weather. Especially in March 10, there was a heavy snow and blizzard in Daqing. At that time, the wind reached level 7. It is precisely because of this strong wind and snowfall in the sky that dust is reduced, so it still has a beneficial impact on the lives of citizens.

There is a folk proverb that says "the sun is dizzy in the middle of the night and the moon is dizzy at noon." The appearance of solar halo and lunar halo means that stormy weather is coming. Therefore, the phenomenon of solar halo is not a bad omen, but a normal weather change, and there is no data to show that the magic day is related to the earthquake. After patient explanation and publicity by experts from the Meteorological Bureau, the people of Daqing finally felt relieved. This magical solar phenomenon has given many people a false alarm. If we have more meteorological knowledge, we can also predict the weather changes according to the weather.