The origin of heavy snow solar terms: heavy snow, as the name implies, has a large amount of snow. The ancients said, "The great one is prosperous, and the snow is prosperous at this point.". At this time, the snow often falls heavily and widely, hence the name heavy snow. At this time, the lowest temperature in most parts of China has dropped to 0℃ or below. Heavy snow often falls in areas where cold and warm air meet at the front of strong cold air, even snowstorms.

It can be seen that the solar term of heavy snow indicates the starting time and the degree of heavy snow during this period, and it is a solar term that directly reflects precipitation, just like the solar terms of light snow, rain and Grain Rain.

In ancient China, heavy snow was divided into three periods: "A cuckoo gull doesn't blare; Second, wait for the tiger to pay; Three waiting for you to stand out. " This means that because of the cold weather at this time, Hanhao birds no longer sing; Because this is the peak period of yin qi, the so-called peak and decline, yang qi has sprouted, so the tiger began to courtship behavior; "Liting" is a kind of bluegrass, and it also feels the sun's spirit sprouting and pulls out new buds.

Characteristics of solar terms in heavy snow: during heavy snow, the temperature drop is large, and the regional span between north and south is large, so the climate characteristics in north and south are different. As the saying goes, "heavy snow is a dry year in succession, so it's time to build ponds and repair warehouses." At this time, it is necessary to step up the construction of waterways, accumulation of fertilizer, repair of warehouses and storage of grain in winter. The women gathered in small groups to do needlework. Craftsman's home will focus on crafts, such as printing New Year pictures, grinding bean curd, weaving baskets, weaving baskets, etc. to make money to subsidize households.

Concrete manifestations of solar terms in heavy snow

Temperatures in North China and the Yellow River Basin have dropped below 0℃: During the heavy snow season, most parts of China have entered winter, with the average temperature in the northeast and northwest regions below-10℃, and the temperatures in the Yellow River Basin and North China have also stabilized below 0℃. At this time, there is gradually snow in the Yellow River Basin, but it is snowing further north.

The south is dry with occasional snowfall: but in the south, especially in Guangzhou and the Pearl River Delta, there are still lush vegetation, and the feeling of dryness is still obvious, which is quite different from the climate in the north. The winter climate in southern China is mild with little rain and snow. The average temperature is about 2℃ to 4℃ higher than that in the middle and lower reaches of the Yangtze River, and the rainfall accounts for only about 5% of the whole year. Occasionally snow falls, mostly in 1 and February; Snow on the ground is hard to see once every three or five years.

South China is foggy and warm in the afternoon: At this time, the climate in South China is still foggy. Generally,1February is the month with the most foggy days. Fog usually appears in cloudless night or early morning in partly cloudy. Meteorology calls it radiation fog. "Ten fogs and nine sunny days", the fog mostly dissipates before noon, and the afternoon sunshine will be particularly warm.