The specific time of light snow in 2023
Light snow is the 20th solar term among the 24 solar terms and the 2nd solar term in winter. The time is Gregorian calendar1October 22 or 23, that is, when the sun reaches 240 degrees of the yellow longitude. 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 will get colder and colder and the precipitation will gradually increase.
"Snow" is the product of cold weather, so "light snow" is used to describe the climate characteristics of this solar term "not deep climate and not heavy precipitation". The "light snow" solar term reflects the changing trend of temperature and precipitation, which 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.
Introduction to Meteorological Changes of Light Snow
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 large range of cold air going south, which will bring a large range of windy and cool weather. The light snow in solar terms is not necessarily related to 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. In meteorology, when the horizontal visual distance is equal to or greater than 1000 meters, the depth of snow on the ground is less than 3 cm, and the snowfall in 24 hours is between 0. 1 ~ 2.4 mm, it 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 light snow and heavy snow, such as the solar terms with the largest snowfall in the middle and lower reaches of the Yellow River and its vicinity.