China Naming Network - Auspicious day query - August 15, Yun Zheyue, it snows on the 15th day of the first month, and the lights are on.

August 15, Yun Zheyue, it snows on the 15th day of the first month, and the lights are on.

The echo relationship between the weather of these two traditional festivals has always been concerned by people. Over time, in many places, if the sky is covered with dark clouds on the night of August 15, then snowflakes often fly on the first month 15. So people summed up a popular weather proverb: "August 15th, Yun Zheyue, the 15th day of the first month, bright".

Of course, the rhythmic activity of the atmosphere is a very complicated problem, and its causes, conditions, manifestations and many other aspects have not been clarified, and this regularity can not be matched in every place and year.

At present, many meteorologists are deeply studying the rhythmic activities of the atmosphere and their causes, and the research results in this area are undoubtedly of great benefit to the development of long-term weather forecasting.

On the surface, "Yun Zheyue" and "Snow Lantern" are the echo phenomena of clouds and snow, but in essence they are the echo relationship of two cold air activities. In other words, if there is cold air activity around the Mid-Autumn Festival, it will cause the "Yun Zheyue" phenomenon. Then around the Lantern Festival, cold air will invade again, forming a situation of "snow hits the lights". Therefore, the proverb "It snows and lights on August 15th and January 15th in Yun Zheyue" is a reflection of the rhythmic activity of the cold air invading China for about five months. According to this proverb, many meteorological stations have studied the rhythm relationship of cold air activity for about five months, and applied it to long-term weather forecast, and achieved good results; The weather on other days also has this rhythm relationship, but it is not generally noticed.

The echo relationship between holiday weather is a manifestation of atmospheric rhythm activity.

Why are there two holiday weather days besides 150 days? It turns out that this is a manifestation of atmospheric rhythmic activity. The atmosphere of the earth is like a big band, with wind, clouds, rain, snow, thunder, electricity, fog and frost, as if the band had played a music with rich timbre. Many studies show that this large-scale movement played by the atmosphere also shows a certain sense of rhythm under the joint action of various physical factors.

That is to say, a certain weather process is obvious at a certain moment, becomes obvious after a certain period of time under certain conditions, or takes other forms due to different seasons, just like the beat in music. On the surface, there is no direct evolutionary relationship between them, but in fact there is a certain relationship. In climatology, this internal connection in the atmosphere is called the rhythmic activity of the atmosphere.