What do you mean by heavy snow? Solar terms

Heavy snow is 2 1 of the 24 solar terms and the third solar term in winter.

When the sun reaches the longitude of 255 degrees, the node time is 65438+February 6-8 in Gregorian calendar every year. The solar term of heavy snow is the beginning of the second month of the dry calendar, marking the official start of the mid-winter season. Heavy snow is a solar term reflecting climate characteristics. Heavy snow solar terms are characterized by a significant drop in temperature and an increase in precipitation.

During the heavy snow, the national temperature dropped significantly, and the cold air in the north became more and more active. The solar term of heavy snow is a climate concept, which represents the climate characteristics during the solar term of heavy snow, that is, temperature and precipitation (water vapor condensate such as rain, snow and hail falling from the sky to the ground is called "precipitation" in meteorology). Like the light snow solar term, the heavy snow solar term is a solar term reflecting the changing trend of temperature and precipitation, and it is also a reflection of ancient farming culture on festivals.

Meteorological change

"Heavy snow" is a solar term reflecting the climate characteristics. The characteristics of heavy snow solar terms are that the temperature drops obviously and the precipitation is higher than that in autumn and early winter. During the heavy snow season, most parts of China enter the cold winter, and the minimum temperature in some parts of the north drops to 0℃ or below. In areas where cold and warm air meets strong cold air fronts, precipitation (rain or snow) increases, and the condensation of water vapor such as rain, snow and hail falling from the sky to the ground is called ".

The meaning of solar terms and heavy snow is different from that of weather. In fact, the snow in solar terms is often not as big as light snow, and the solar terms with the largest snowfall in the whole year are not in light snow and heavy snow. For example, in the middle and lower reaches of the Yellow River, the solar term with the largest snowfall in the whole year is neither "light snow or heavy snow" nor "slight cold" (because the temperature was low at that time and there was less water vapor in the atmosphere), but "rain" in spring.