Heavy snow time in 2023
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 obviously 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.
During the heavy snow, the national temperature dropped significantly, and the cold air in the north became more and more active. Heavy snow solar term is a climate concept, which represents the climate characteristics during the period of heavy snow solar term, namely 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
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 amount of snow in the whole year are not in light snow and heavy snow. Take the middle and lower reaches of the Yellow River as an example. Among the 24 solar terms, the solar term with the largest annual snowfall is neither light snow nor heavy snow, nor slight cold (because the temperature was low at that time and there was less water vapor in the atmosphere), but in the spring rain solar term, and the snow solar term is not the largest.
The reason is similar to that Yu Xiaoxue is heavier than heavy snow, that is, the coldest period of the year has passed in late February of the Gregorian calendar. 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 strong, and the warm air flow rises strongly and persistently on the back of the dense cold air flow, so there may be heavy snow, and there is no necessary connection between solar terms and heavy snow.