Characteristics of solar terms from winter solstice 1. Low temperature, the temperature will be lower and lower. Climatically, during the winter solstice, the average temperature in the northwest plateau is generally below 0℃, and it is only about 6℃ to 8℃ in the south. In addition, the winter solstice begins to count nine. Generally speaking, the solstice in winter becomes the first day of "counting nine". As for "Counting Nine", a folk song circulated since ancient times goes like this: "Ninety-nine don't move, March 90 walks on the ice, May 90 sees willows along the river, July 90 opens the river, August 90 swallows come, and 99 plus 90 cows walk everywhere." However, in the valley areas with low altitude in southwest China, even in the first half of the coldest 1 month, the average temperature will be above 10℃. It can be said that autumn comes and spring comes, and there is no winter all year round.
Second, the daytime time becomes shorter, the nighttime time becomes longer, and the daytime time gradually increases. From winter to around, although the northern hemisphere has the shortest sunshine time and receives the least amount of solar radiation, the accumulated heat on the ground in summer can also provide some supplement, so the temperature is not the lowest at this time. But after the winter solstice, the days will become longer and longer, so the winter solstice is equivalent to a demarcation point. After the winter solstice, the solar radiation on the ground is still less than the heat lost by the ground radiation, so the temperature will continue to drop in the short term. Except for a few islands and coastal areas in China, 65438+ 10 is the coldest month, so there is a folk saying that "winter solstice is not too cold", and astronomy also stipulates that "winter solstice" is the beginning of winter in the northern hemisphere. Astronomy regards the winter solstice as the beginning of winter, which is relatively late in most parts of China. The winter solstice is the shortest day and the longest night in a year. After the winter solstice, the direct point of the sun will gradually move northward, and the daytime time in the northern hemisphere will gradually become longer and the nighttime time will gradually become shorter.
Which solar term is the winter solstice in 2020? Generally speaking, the temperature of the severe cold solar term is lower than that of the winter solstice solar term. The solar term from the winter solstice to the sun is the 22nd solar term in 24 solar terms, which is also called "Jiujiu", "Winter Festival", "Long Festival" and "Chinese New Year". After the solar term of the winter solstice, the cold winter is coming, frequent snowfall begins, and the temperature begins to drop.
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