What are the characteristics of the winter solstice solar terms?
The winter solstice solar term is the third solar term in winter in my country, representing the daytime The characteristics of the shortest and the temperature drop, so whenever the winter solstice comes, the people will eat some foods with relatively high calories, and prepare items for the winter to prevent the cold wave from coming.
Winter Solstice Introduction
The winter solstice is the 22nd solar term of the "Twenty-Four Solar Terms".The winter solstice is the extreme southward travel of the sun, the day when the sun is at its lowest in the northern hemisphere.On the winter solstice, the sun shines directly on the Tropic of Cancer, and the sun is most inclined to the northern hemisphere.The winter solstice is the turning point of the sun.After this day, it will take a "turn back".The direct point of the sun begins to move northward from the Tropic of Cancer (23°26’S), and the day in the northern hemisphere (my country is located in the northern hemisphere) will increase day by day.
The climate of the winter solstice solar term
In terms of astronomical climate characteristics, although the days on the winter solstice are short, the temperature on the winter solstice is not the lowest; it will not be very cold before the winter solstice, because There is still "accumulated heat" on the surface, and the real cold winter is after the winter solstice.Due to the vast territory of our country, the climate varies greatly from place to place, and this astronomical climate characteristic is obviously late for most parts of our country.On the winter solstice, the average temperature in most parts of northern my country is generally below 0 °C, while most areas in the south are only about 6 °C to 8 °C; the northeast is frozen for thousands of miles, and the jade is decorated with Qiong; the Huanghuai area is often covered in silver and plain.; The winter crops in the Jiangnan area continue to grow; and the average temperature along the coast of South China on the winter solstice is usually above 10 ℃.
The astronomical phenomenon of the winter solstice solar terms
Modern astronomical science determines that on the winter solstice, the sun runs to 270° ecliptic longitude (the winter solstice point), and the position of the sun directly hitting the ground reaches the highest point of the year.At the southern end, the sun is almost directly on the Tropic of Cancer (also known as the Winter Solstice), and the sun is most inclined towards the northern hemisphere.Therefore, the winter solstice is the day of the year with the shortest days and the longest nights in the northern hemisphere, and the higher the latitude, the shorter the days and the longer the nights.For all parts of the Northern Hemisphere, the winter solstice is also the day with the lowest midday sun of the year.North of the Arctic Circle, the sun is below the horizon all day, making it the most polar night of the year in the northern hemisphere.On the winter solstice, the northern hemisphere gets the least amount of solar radiation, about 50% less than the southern hemisphere, which is in the middle of the hot summer.
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