When is the solar term of heavy snow?

The solar term of heavy snow is 65438+February 6-8 in Gregorian calendar.

Heavy snow is a solar term reflecting climate characteristics. Compared with autumn and early winter, the characteristics of heavy snow solar terms are that the temperature drops significantly and the precipitation increases. During the heavy snow season, most parts of China have entered the cold winter, and the minimum temperature in some parts of the north has dropped to 0℃ or below. In the area where cold and warm air meet at the front of strong cold air, precipitation (rain or snow) increases, and the water vapor condensate such as rain, snow and hail falling from the sky to the ground is called precipitation.

Every year around 65438+February 7th in Gregorian calendar, when the sun reaches 255 degrees of the Yellow Meridian, it is a solar term of heavy snow. The twenty-four solar terms are the product of agricultural civilization, and the main climatic factors affecting agricultural production are precipitation, temperature and light. Like Xiaoxue solar term, it is a solar term reflecting the changing trend of temperature and precipitation, and it is also a reflection of farming culture in festivals. Heavy snow is a solar term reflecting climate characteristics, including precipitation, temperature and light.

Meteorological change

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 that in light snow, and the solar terms with the largest snowfall in the whole year are not 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, 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.

The reason is similar to "light snow is bigger than heavy snow". That is, the end of February of the Gregorian calendar has passed the coldest period of the year. In early spring, the warm air in the south began to be active and the water vapor began to be rich. At this time, the cold air force in the north is still strong, and the warm air rises strongly and persistently on the back of dense cold air, which may lead to heavy snow. There is no necessary connection between solar terms and heavy snow.