Xiaoxue is the 20th solar term in the 24 solar terms and the second solar term in winter. The time is on November 22 or 23 of the Gregorian calendar every year, that is, when the sun reaches 240° of yellow longitude. Light snow is a solar term that reflects precipitation and temperature, and it is a solar term with a high frequency of cold waves and strong cold air activities. The arrival of the light snow solar term means that the weather will get colder and the precipitation will increase.
The reason why this solar term is called "light snow" is because "snow" is the product of cold weather. The climate during this solar term is not too cold and the precipitation is not heavy, so "light snow" is used to describe the climate characteristics of this solar term. "Little snow" is a metaphor, reflecting the active cold current and increasing precipitation during this solar term, not the small amount of snow falling during this solar term.
During the light snow solar term, a relatively stable meridional circulation has been established in East Asia. There are often low pressures or low troughs in Siberia. When moving eastward, there will be large-scale cold air moving southward, and there will be large-scale strong winds and cooling weather in southeastern China.
"Xiao Jingwei," said: "(Lidong) Fifteen days later, when the bucket refers to Hai, it is light snow. The sky and the earth accumulate cloudily, and the temperature is rain, and the cold is snow. When the time is small, the cold is not deep and the snow is not heavy. "Xiaoxue solar term is a climate concept, which represents the climate characteristics during the light snow solar term. Climate elements include precipitation, temperature, light, etc., among which precipitation is an important element of climate. Light snow is a solar term that reflects the changing trend of temperature and precipitation. Meteorologically, rain, snow, hail, and other water vapor condensates falling from the sky to the ground are called "precipitation". The reason why this solar term is called "light snow" is because "snow" is the product of cold weather. The climate during this solar term is not too cold and the precipitation is not heavy, so "light snow" is used to describe the climate characteristics of this solar term. The arrival of the light snow solar term means that the weather is getting colder and the precipitation is increasing.