Is the day long at the beginning of the winter solstice? What are the climatic characteristics
winter solstice is the solar term after heavy snow. During the winter solstice, it is always the custom to eat dumplings in the South and dumplings in the north. However, the weather has also changed in the winter solstice. Is there a long side in the daytime at the beginning of the winter solstice? What are the climatic characteristics? Next, let's follow the old yellow calendar of this issue and have a look!
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does the winter solstice begin to lengthen the day: Yes, the winter solstice is before and after December 22 every year, when the sun is at 270 degrees of the Yellow meridians, and the sun is almost directly directed at the Tropic of cancer. After the winter solstice, the direct point of sunlight began to move to the northern hemisphere, the day gradually lengthened and the night gradually shortened. After the winter solstice, although the day is getting longer and the night is getting shorter, the day is still short and the night is long in the short term. The heat absorbed by the ground every day is still less than the heat lost, so the temperature does not rise immediately. The masses are used to "counting nine" from the winter solstice and a "Nine" every nine days. Before and after the "March 9th", the ground area stores the least heat and the weather is the coldest, so it is said to be "cold in March 9th". The winter solstice is the shortest day and the longest night in the northern hemisphere. The higher the latitude, the shorter the day and the longer the night. Within the Arctic Circle, it is night all day. In ancient times, ancestors called this day "short day" or "short day". The proverb "eat winter solstice noodles, a long line a day" means that. Although the winter solstice has the shortest sunshine time, it is not the coldest day in winter, because the heat accumulated on the ground in the early stage has not been lost to the extreme. After the winter solstice, as the heat stored in the land area decreases, the temperature will continue to decline for a period of time. There is a reason why people refer to the winter solstice as "counting nine cold days". The winter solstice is the starting date of "March 9". In astronomy, the winter solstice is also regarded as the beginning of winter climate.
you may be interested in: what is the difference between the winter solstice customs in the South and the north? What are the climatic characteristics of the winter solstice: continuous low temperature and Blizzard weather? From the astronomical point of view, the winter solstice is the beginning of the real winter and the arrival of winter in the northern hemisphere, but winter comes earlier in most parts of China, The winter climate has been very obvious during the winter solstice. China's first place to enter winter is at high latitude and high altitude, that is, Shuanghu County in Tibet and Mohe County in Heilongjiang are relatively early places to enter winter in China. It has ushered in the characteristics of winter climate as early as mid September, and the cold has reached a certain peak at the winter solstice. During the winter solstice, the sunshine duration during the day is the shortest in a year. It is conceivable that the earth can absorb and release very little heat. With less heat supply, the overall temperature and body feeling will drop. After the winter solstice, although the sunshine duration will slowly lengthen, the speed is really slow, and the heat is far from enough to keep warm. It was already cold without sufficient heat source supply. Coupled with the continuous invasion of cold air in Siberia, it was difficult for the temperature to be not low under both conditions. Under the continuous low temperature, strong snowfall appeared.
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from the winter solstice temperature in the north and northwest, the temperature is generally below zero during the winter solstice, and the average temperature in the Northeast should be about minus 7 degrees during the winter solstice; The average temperature between the Yangtze River and Huaihe River to the north of Daba Mountain is also below zero; The average temperature in most parts of the south is about 7 degrees. The temperature in some high-altitude areas will be generally low, and the local temperature in the valley will be high. Among them, the temperature in the valley in Southwest Sichuan during the winter solstice is more than 10 degrees; The "winter Free Zone" in South China, especially in Hainan, is as warm as that in the DIHE River Valley. The lowest average temperature in winter is about 20 degrees. Even if there is a temperature of more than ten degrees, it will not last for three days, and it will soon warm up again. After the winter solstice, the coldest season in China comes, that is, "count nine" starts from the winter solstice. As the saying goes, "but the winter solstice is not cold", it means that the climate is still warm before the winter solstice. After the winter solstice, the cold comes. Some of these proverbs and sayings are only for some areas, and may also be derived from the general climate phenomenon of the year. In some years and regions of China, it is very cold during the winter solstice, especially in high latitudes. Therefore, whether the winter solstice is the beginning of cold or not, we should pay attention to keeping warm before and after the winter solstice.
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