"Qingtian" was discovered in Zhengzhou, Henan. What is the reason for this phenomenon?

This phenomenon is an extreme climate manifestation caused by strong convective weather, and it has a great influence. As you can see, a wave of rain in Zhengzhou is really strong. However, even if the "green sky" has a scientific explanation, it is difficult to stop all kinds of theism. ...

This rainstorm in Zhengzhou reminds me of the "July 20" rainstorm last year. By 6 pm on July 25 this year, there was another rainstorm in Zhengzhou. Certainly not as strong as last year.

However, there was a very strange scene. I believe that Zhengzhou's friends have noticed that the rainy sky first turns black, then green and then yellow. I believe many people have never seen such a change.

On the 25th, there was a rainstorm in Zhengzhou, and the sky turned black first. The darkest hour is like night. If you were there, you would be very scared. Later, the sky turned green, turquoise, and soon turned yellow.

Everyone has seen the rain turn black, and many people should know the reason. The main reason is that the cumulonimbus cloud is thick, which blocks the sunlight and scattered light, so it turns black. However, almost no one has ever seen rainy days turn green. What about other colors, such as blue in the sky, yellow in sandstorm, gray in smog, red in the morning and evening, and green sky?

In fact, this phenomenon also occurred in a place in South Dakota on July 5, the United States. Although it is spectacular, it is also very strange.

The explanation of the relevant departments in the United States is that this is an extreme climate phenomenon, one of the signs before the occurrence of heavy hail, and also the transformation process of extreme rainfall.

Sure enough, there was an extreme climate in the local area. The wind speed of the storm was as high as 150 km/h, followed by hail, and more than 20,000 households were cut off along the way.

This blue sky phenomenon in Zhengzhou, Henan Province is similar to the situation in the United States that day, which is an extreme climate change, rather than various theological speculations on the Internet.

So how did this happen?

Before explaining, everyone needs to know the formation principle of sky color. The color of the sky is essentially due to sunlight, but sunlight has many colors and belongs to the combination of various colors. We have learned in textbooks that when sunlight hits the earth, it will pass through the atmosphere, and the thickness of the atmosphere is different. There are also various molecules, sols and particles. After sunlight hits the ground, it will scatter and reflect, thus forming the color of the sky that everyone sees.

The "blue sky" in Zhengzhou this time is mainly due to the appearance of stormy weather and the thickening of clouds in the sky. The tiny water droplets make the Rayleigh scattering of sunlight (the scattering of light to small particles in the air, the molecular diameter of which is smaller than the wavelength of light) and Michaelis scattering (the scattering of light to large particles and dust in the air, the diameter of which is larger than the wavelength of light) occur simultaneously.

Because the blue sky you usually see is due to the Rayleigh scattering of sunlight in the atmosphere, when a storm occurs, it is difficult for the blue scattered light with short wavelength to penetrate the clouds containing water droplets or ice crystals, and you can't see the blue sky, but the green belt can just penetrate the clouds at this time, and light of other colors can't appear in this weather. Because the green scattered light has a medium wavelength and occupies a dominant position, everyone sees a "green sky".

Of course, this phenomenon can't last forever in extreme weather, so friends in Zhengzhou should be able to see that the green sky turns yellow soon after it lasts, because the clouds become thinner. At this time, the sun shines above the clouds, and at night, orange and red light passes through the atmosphere, and the clouds turn orange or red, but there is a thin layer of light gray rain clouds, and the colors look like light gray yellow when superimposed, and then turn clear.

The emergence of green sky is mainly due to strong convection in the atmosphere. At this time, there is a lot of water in the clouds, which causes the above phenomenon. Generally speaking, the green sky may indicate the coming of severe weather such as heavy hail.