Why is165438+1October 22nd a solar term for Xiaoxue every year?

Light snow, the time is Gregorian calendar165438+1October 22nd or 23rd.

Light snow is the 20th solar term in 24 solar terms and the second solar term in winter, that is, when the sun reaches 240. 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.

"Snow" is the product of cold water vapor, representing cold and precipitation. The climate in this season is not deep and the precipitation is not heavy, so "light snow" is used to describe the climate characteristics of this season. "Light snow" is a metaphor, which reflects the active cold current and increased precipitation in this solar term, rather than the light snow under this solar term.

Extended data:

Xiaoxue solar term is a climate concept, which represents the climate characteristics during Xiaoxue solar term. Climate factors include precipitation, temperature and light, among which precipitation is an important factor of climate. Meteorology, rain, snow, hail and other water vapor condensation falling from the sky to the ground are called "precipitation".

Light snow solar terms, like heavy snow solar terms, reflect the changing trend of temperature and precipitation, and are the reflection of ancient farming culture on festivals. Light snow 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. ?

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 large-scale cold air heading south, and there will be a large-scale gale and cooling weather in the southeast of China. Light snow is a solar term reflecting the climate characteristics.

Baidu Encyclopedia-Xiao Xue