A poem describing the light snow season scatters mica powder all over the world.

A poem describing mica powder scattered all over the world during the light snow season: Lu Wengui, a writer in the Yuan Dynasty, wrote about a sudden cold snow in late October.

Light snow is the twentieth solar term among the twenty-four solar terms and the second solar term in winter. The time is Gregorian calendar1October 22 or 23 165438, that is, when the sun reaches 240 degrees of the yellow meridian. 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. The arrival of the light snow solar term means that the weather is getting colder and colder and the precipitation is gradually increasing.

Light snow is a climatic concept, and its climatic factors include precipitation, temperature and light. The name of light snow, because "snow" is the product of cold weather, the climate is not deep and the precipitation is not heavy during this solar term.

Therefore, "light snow" is used to compare the climate characteristics during this solar term. The "light snow" solar term reflects the changing trend of temperature and precipitation, and does not mean that there is a small amount of snow under this solar term. The solar term "light snow" is not necessarily related to the "light snow" in the weather.

During the light snow solar term, a relatively stable meridional circulation has been established in East Asia, and low pressure or trough often appears in Siberia. When moving eastward, there will be a wide range of cold air going south, which will bring a wide range of strong winds and cool weather.

Meteorological changes:

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. The "light snow" in the weather forecast refers to the snow with less snowfall intensity.

Meteorologically, the snowfall with horizontal visible distance equal to or greater than 1000m, ground snow depth less than 3cm, and 24-hour snowfall between 0. 1-2.4mm is called "light snow".