The first domestic rainbow forecast rainbow weather forecast official website.

1. What do you think of the first rainbow forecast in China? 2. Why do rainbows appear in the sky? 3. What weather forecasting software is the most accurate? How to treat the first rainbow forecast in China?

After the rain, I believe everyone will look forward to a magical natural phenomenon. It's a rainbow after rain, but not every time it rains. Can you predict rainbows like the weather forecast? The forecast rainbow first appeared in the northwest of China. But this forecast is only valid in places with many rainbows!

Recently, Zhaosu, Xinjiang, China officially released the first rainbow forecast in China through the official account of Zhaosu Weather and WeChat, which made it possible for many people to realize their infinite romantic dream of chasing rainbows.

Perhaps many people still don't quite understand why Zhaosu became the first place in China to forecast rainbows. It is reported that due to the unique geographical and climatic conditions in Zhaosu, there will be more than 150 rainbow scenes in this area from May to August, as many as 3 to 5 times a day, and double rainbows or even triple rainbows often appear, making it a romantic place in China, also known as the "Rainbow Capital of China".

As one of the first national global tourism demonstration zones, Zhaosu is not only the rainbow capital of China, but also has built many tourist business cards in recent years, such as "Hometown of Gastrodia elata in China" and "Hometown of Rape in China", showing the people the infinite beauty of Xinjiang's natural scenery. The word rainbow was released by the Meteorological Observatory after two years of forecast and trial operation. 10 hour forecast accuracy can reach 85%, which can help people better watch the romantic rainbow scene.

On July 5th, Zhaosu County officially released the first rainbow forecast through the WeChat WeChat official account "Zhaosu Weather", which realized the first release of the rainbow forecast to the public in China.

Krishna Kumari, deputy director of the Meteorological Bureau of Zhaosu County, said that rainbow forecasting, in a sense, is thunderstorm forecasting, which belongs to a small and medium-sized weather system, with small influence range, short time, rapid evolution and great difficulty in forecasting rainbows.

Wang Xiurong, chief meteorological service expert of China Meteorological Bureau, said in a telephone interview: "At present, there is no precedent for commercial release of rainbow forecast in China. Zhaosu Meteorological Bureau solved the problem of rainbow forecast and provided scientific basis and reference for future rainbow forecast research in China. " She also said that after many special discussions, it is certain that Zhaosu is one of the places with the highest frequency and the largest number of rainbows in China.

It is understood that, as one of the first national tourism demonstration zones, Zhaosu County has successively built business cards such as "the hometown of gastrodia elata in China" and "the hometown of rape in China" in recent years. In 20 18, Zhaosu County received 2.5 million tourists, up 40% over the previous year. This year, the county has declared the title of "Rainbow Capital of China" to the Meteorological Service Center of China Meteorological Bureau, and now it has entered the final evaluation stage.

Why do rainbows appear in the sky?

Why do rainbows appear in the sky?

Why are there rainbows in the sky? The rainbow after the rain is very wonderful. Rainbow is an optical phenomenon in nature. When light passes through water droplets, it will be reflected and refracted, and an arched color ring will be formed in the sky. This is a rainbow. So why are there rainbows in the sky?

Why is there a rainbow 1 in the sky?

In summer, after the rain, the dark clouds fly away and the sun reappears. In the sky opposite the sun, there will be a semi-circular rainbow.

Rainbow is formed because sunlight is emitted in the air and refracted into water droplets.

We know that when sunlight passes through the prism, the direction of the foreground will be deflected and the original white light will change.

The line is broken down into seven color bands: red, orange, yellow, green, cyan, blue and purple.

After the rain, there are many tiny water droplets floating in the air. When the sun shines on them, they will refract and disperse.

Into seven colors of light. Many small water droplets refract sunlight at the same time, and then reflect into our eyes, and we will see one.

A semicircle rainbow. The ribbons of the rainbow are distinct, the red one is on the outermost side, followed by six colors of orange, yellow, green, cyan, blue and purple.

The size of water droplets in the air determines the bright color and width of the rainbow. When the water drops in the air are large, the rainbow is bright. also

Relatively narrow; On the contrary, if the water drops are small, the rainbow will be light and wide.

We can't see the rainbow when facing the sun, but only when facing the sun can we see the rainbow, so the rainbow in the morning appears.

In the west, the rainbow at dusk always appears in the east. But we can't see it. We can only see it from the sky by plane.

The appearance of rainbow is related to the weather change at that time. Generally, we can infer that the rainbow will appear at that time from its position in the sky.

It is sunny or rainy. When there is a rainbow in the east, it is not easy to rain locally, and when there is a rainbow in the west, it may rain locally.

Very sexual.

The visibility of rainbow depends on the size of water droplets in the air. The bigger the water drop, the brighter the rainbow, and the smaller the water drop, the less obvious the rainbow is.

Generally, in winter, the temperature is low, there are few water droplets in the air, and there are few opportunities for showers, so rainbows generally do not appear in winter.

Why does Rainbow 2 appear in the sky?

Why is the rainbow arched?

The sky behind raindrops is like raindrops. At this time, the sun shines through the raindrops and forms a rainbow. When light passes through water droplets, it will be reflected and refracted, which we learned in junior high school physics class. When light refracts and radiates, the direction of light changes. When light is reflected on water droplets, the water droplets will reflect back from the opposite direction. When light is refracted, it will form loops in different directions. This reflected and refracted light is intricately intertwined to form some curved light, so what we see with the naked eye is an arch.

Why are rainbows colorful?

Natural light has different wavelengths, and different wavelengths have different colors. Natural light usually contains long-wavelength red light, orange light and yellow light. Some light waves are invisible to our naked eyes, while what we can see with our naked eyes is generally red, yellow, blue, green and purple light waves. So raindrops will show various colors after being reflected and refracted by light. In fact, the color of the rainbow is not only visible to our naked eyes.

Why do rainbows usually appear in the season with high temperature after rain?

When the temperature is low, water droplets are generally not easy to appear in the air, and there is little rain in winter, so rainbows generally do not appear in winter.

Why does Rainbow 3 appear in the sky?

Meteorologist: The frequent occurrence of rainbows is related to the recent thunderstorm weather.

In the morning, Ms. Lin, who lives in Mishi Road, Yuexiu District, walked out of the balcony and accidentally saw the beautiful rainbow. Although it was only a minute or two, the excited Ms. Lin picked up her mobile phone and took many photos. "The balcony faces west. I have never seen a rainbow in my mind. I am so lucky this time. " Ms. Lin said when sharing pictures with reporters.

Not only today, some citizens remember that there were rainbows in Guangzhou in June 17 and August 15 respectively, and there were double rainbows in June 17.

Why is Guangzhou always favored by rainbows recently? Meteorologists told reporters that rainbows often appear in the afternoon to evening in summer, and are most likely to appear when the sky is Chu Qing after rain. The recent rainbow in Guangzhou is related to more thunderstorms in summer afternoon.

When a rainbow appears, it often rains very hard, but at the same time it is still bright sunshine. At this time, the air is full of small particles of dust, and one side of the sky is darkened because there are still rain clouds. Observers can see the sunshine without the cover of clouds above or behind them, so that the rainbow will be easier to see. On June 17, a double rainbow appeared in Guangzhou, which is actually a dispersion phenomenon caused by the reflection and refraction of solar rays by water droplets in the atmosphere.

Experts explained that, generally speaking, when sunlight "refracts-reflects-refracts" in small water droplets, it will form a rainbow, and the arc of light will appear outside red and inside purple; If sunlight "refracts-reflects-reflects-refracts" in water droplets, neon will be formed, and the light arc region is ultraviolet and red, and the color sequence of the two is just the opposite. This kind of rainbow double display phenomenon is easy to appear in the morning and evening when the water vapor is abundant, the incident angle of sunlight is about 42 and the neon is about 52.

Environmental monitoring expert: The air is getting better and the rainbow is brighter.

Some citizens said: "I grew up in Guangzhou, and the probability of seeing a rainbow in the past was very small. This summer is really very much. Is it related to the improvement of air quality in Guangzhou? " In this regard, Zhang Jinpu, air quality forecaster of Guangzhou Environmental Monitoring Center Station, said: "I also feel that there are more rainbows this year than before, but the appearance of rainbows is still an atmospheric optical phenomenon. No one has done systematic research, and it has much to do with the improvement of air quality."

However, Zhang Jinpu also said that with the improvement of air quality, atmospheric visibility and permeability, the rainbow will be brighter.

Miss Chen, a citizen, also said: "I used to see more than half a rainbow in Guangzhou, all of which were hazy." I saw a whole rainbow many times this year, and I saw the taste of rainbow in my hometown when I was a child. " In this regard, Wu Dui, a meteorologist and second-class professor of Jinan University, explained that the particulate matter that affects air quality is below 10 micron (that is, PM 10, and the raindrops that form rainbows are between P100 and PM8000, and there is little correlation between them.

However, in foggy weather, the air visibility is poor, and the color difference of the rainbow will be inconspicuous and fuzzy; After the particulate matter in the air is reduced, the rainbow will appear bright and layered, with red, orange, yellow, green, blue and purple clearly visible.

Monitoring shows that the air quality in Guangzhou has continued to improve this year, especially the concentration of particulate matter has dropped significantly year-on-year. From June 5438 to August 2020, the comprehensive index of ambient air in Guangzhou was 3.29, down 10.8% year-on-year. The average concentration of PM2.5 is 20 μ g/m3, down 20.0% year-on-year, lower than the EU standard of 25 μ g/m3; In addition, the average concentration of PM 10 was 38 μ g/m3, which was 1 1.6% lower than that of the previous year.

New expectation: Rainbow can also predict the allegedly 85% accuracy.

Wu Dui also said that people think that seeing so many rainbows this year is related to changes in meteorological conditions. "The meteorological conditions once every ten years and once every few decades are quite different, but people's life span is much shorter than the cycle of weather changes. In fact, the weather is in a normal cyclical change, but people often think that this is rare. "

It is understood that rainbow forecast has been launched in some parts of China at present, providing the probability and expected position of rainbow. It is said that its accuracy is 85% and it can be predicted 10 hour in advance. In order to forecast the rainbow, it is necessary to forecast thunderstorms with small influence range, short time and fast change, and at the same time, to accurately calculate the positions of rain, rainbow observers and the sun. In addition, the forecast also has certain requirements for atmospheric cleanliness. Although the rainbow forecast is worth looking forward to, it is not easy to popularize it on a large scale nationwide.

What weather forecasting software is the most accurate?

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