When reading the weather forecast in normal times, you often hear such a saying, that is, "local heavy snow", "local heavy rain", "local wind" and other weather conditions, of course, the "local" referred to here is often a certain area in a city, or a local city in a province.
However, recently in Yan'an, Shaanxi, there was an extremely rare "local heavy snow", according to reports, a man living in Yan'an, Shaanxi, just behind the front of his house, filmed a completely different scene.
It turned out that the man's family lived on the upper floor, and on his balcony, he photographed a gray, completely devoid of snow, and there was a scene of pedestrians walking on the road, and when he went to the other side of the house and shot out through the window, there was a scene of heavy snow, which was really strange.
So, what is the principle of partial snow, separated by only one balcony?
Judging from the picture taken by the man, the sky on the side of the balcony, although it does not snow, looks like the sky is gray and full of water vapor, which also means that the upper atmosphere on this side is also in a state of water vapor saturation, but because the temperature is not enough, it does not form ice crystals falling, but only forms a foggy water vapor.
In the upper atmosphere on the other side, because the water vapor is cold at high altitude and condenses into solid particles, there will be a situation of heavy snow, of course, such a situation is extremely rare, and it is difficult to encounter in life.
Speaking of which, such a situation, and in the summer, the more common "no rain between the channels", are caused by strong convective weather in the upper atmosphere, resulting in the action of cold and warm masses, resulting in a local boundary is very obvious, resulting in the same road, rain on one side, while not raining.
In addition, there are many similar, very magical natural phenomena, such as the more common "sun snow", "sun rain" and so on, when they appear, they often make people lament that nature is very magical.
So, what is "sun snow" and "sun rain"?
Let's start by looking at what "solar snow" is. This is a relatively rare, short-term snowfall that occurs in the winter, and the time of occurrence is mainly concentrated around 9 to 10 am, or 3 to 4 pm in the afternoon.
Because it is a short-term snowfall situation, and the amount of snowfall is not strong, the thickness of the snowfall clouds in the high altitude cannot completely block the sunlight, so when it snows, there is still sunlight shining through the clouds.
For example, in December last year, in the Jinan area of Shandong Province, just after 3 p.m., there was a sudden "solar snow", a short-term snowfall that lasted for about 40 minutes, and in the snowflakes flying in the sky, people also saw the big sun dangling overhead.
Many citizens said that this scene is really very magical, and even many people believe that this is an auspicious omen of the "Ruixue Mega Year", because the new year is approaching soon, and many citizens believe that this is a symbol of good luck.
Let's look at what "sun rain" is. The study believes that the reason for the appearance of "solar rain" is mainly because under the action of the solar wind, suddenly in the local sky, there are two clouds with different charges and carrying a large amount of water vapor, at this time, under the influence of temperature and solar radiation, it will lead to local rain, but because the clouds cannot cover the sun, naturally, it will rain on the one hand, and the sun will come out at the same time.
For example, in September last year, there was "sun rain" in Hangzhou, and at that time, many people filmed this magical scene. Of course, there is more magical, that is, often after the end of the "sun rain", there will be a rainbow in the sky, this is because when it rains, it is because the water vapor in the air is very sufficient, therefore, under strong sunlight, natural, accompanied by the principle of light refraction, the sky is more likely to appear rainbow.
Interestingly, in ancient times, because people did not understand the principle of "sun rain", and compared to "sun snow", "sun rain" is also more common in summer, so the ancient "sun rain" was also given a special meaning, for example, folk believe that when "sun rain" appears, it is "fox marrying".
Of course, some people say that the appearance of "sun rain" is also an auspicious omen, after all, when the "sun rain" ends, there is a high probability that there will be a rainbow, which in people's eyes, the rainbow itself is a very beautiful symbol.
However, these implications in the eyes of the ancients, in the face of modern science, are not scientific basis, these are the beautiful expectations of the ancients, as if the ancients looked at different celestial phenomena, so as to analyze different "auspicious and evil blessings", then, what special natural phenomena have you seen? Welcome to share with us!