What is the emphasis on light snow in the twenty-four solar terms?

Xiaoxue is characterized by cold weather, and is used to pickling pickles, drying dried fish, eating soup and drinking Xiaoxue wine.

Xiaoxue solar term is the twelfth of the twenty-four solar terms. Generally, when 20 suns reach the longitude of the Yellow River at 240 degrees,165438+1it starts to snow on October 22nd or 23rd, but the amount of snow is small. "Xiaoxue" is in the second half of the solar calendar 1 1 and the second half of the lunar calendar in October.

"Light Snow" is a festival that reflects weather phenomena. The ancient book "Qunfangpu" said: "A light snow will snow when it is cold, but the ground is not cold and the snow is not heavy." That is to say, due to the cold weather, in the "light snow" festival, the form of precipitation changed from rain to snow, but at this time, because the ground is not very cold and the amount of snow is not large, it is called light snow. The beginning of the light snow solar term means that the temperature drops. At this time, you should do your own warm work to avoid catching a cold because of the sudden drop in temperature.

Meteorological change

Light snow is a solar term reflecting precipitation and temperature, and it is a solar term with high frequency of cold wave and strong cold air activity. Light snow solar terms indicate that a relatively stable meridional circulation has been established in East Asia. When the Siberian depression or trough moves eastward, there will be a wide range of cold air going south, which will bring a wide range of windy and cool weather. There is no necessary connection between the light snow in solar terms and the light snow in the weather. The meaning of "light snow" in solar terms is different from that in daily weather forecast. Light snow solar term is a climate concept, which reflects the temperature and precipitation.

Meteorologically, the horizontal visible distance is equal to or greater than 1000m, the snow depth on the ground is less than 3cm, and the snowfall in 24 hours is between 0. 1-2.4mm, which is called "light snow" .. Light snow solar terms do not necessarily snow. In fact, the solar terms with the largest snowfall in the whole year are not in light snow and heavy snow. For example, the solar term with the largest annual snowfall in the middle and lower reaches of the Yellow River and its vicinity is neither "light snow and heavy snow" nor "slight cold and severe cold", but a "rainy" solar term in spring.