Sunshine standard of light snow solar terms in Beijing

For a long time, China has used the "summer calendar", with October as the beginning of the year. Known as "Yang", it is customary to call October of the lunar calendar "Xiaoyangchun". Early winter, late winter, early winter, early winter, Yue Ji, Liang Yue, Kunyue, YueYang, Xiaoyangchun, Haiyue and Ying Zhong, so Xiaoyangchun refers to October of the lunar calendar, only one month.

In some areas of our country, the climate of this season is called the habit of "Koharu in October", which means that some fruit trees will bloom twice during the winter solstice and the light snow festival, showing the same warm weather in spring as in March.

Extended data:

Two solar terms related to Xiaoyangchun:

1, beginning of winter

Beginning of winter is one of the 24 solar terms in the lunar calendar and one of the traditional festivals in China. The time point is between Gregorian calendar165438+1October 7-8 every year, that is, the sun is located at 225 degrees of the yellow meridian. At this time, the earth is located at declination-16 19', and the noon sun height in Beijing is only 33 47'.

After beginning of winter, the sunshine time will continue to shorten, and the height of the sun will continue to decrease at noon. China people regard beginning of winter as beginning of winter, and during their stay in beginning of winter, it is necessary to supplement food to spend the severe winter.

Li also means that winter begins. Winter means the end, which means that the crops should be harvested after harvest. China regards beginning of winter as the beginning of winter.

Beginning of winter solar terms and high-altitude westerly jet have been fully established in South Asia. At this time, the fluctuation of the south branch of the high-altitude westerly wind and its eastward movement have great influence on the precipitation weather in Jianghuai area. When the zonal circulation in Asia and the fluctuation of the south branch of the westerly wind are strong, there will be a wide range of rainy weather. In addition, the zonal circulation will end, the meridional circulation will be established, and there will be a cold wave and significant cooling.

Before and after winter, precipitation in most parts of China decreased significantly. The land in northern China is frozen, and agricultural and forestry crops have entered the wintering period. The "Sanqiu" in the Jianghuai region of China is drawing to a close, but the southern region of China needs to quickly plant late-season winter wheat and transplant rape, and the southern region is the best time to plant wheat. In addition, after winter, the air generally becomes dry and the soil water content decreases. At this time, China began to pay attention to the fire prevention work in forest areas.

2. Xiaoxue

Light snow is the twentieth solar term in the twenty-four solar terms of the lunar calendar. The time is165438+1October 22 or 23, when the sun reaches 240 degrees of the yellow meridian, it is called the light snow solar term. In the light snow solar term, the sun is located at-2016' at declination. On this day, Beijing's daylight saving time is only 9 hours and 49 minutes, and the height of the sun at noon is only 29 50'.

During the "light snow" solar term, the bucket handle of the Big Dipper points to the northwest at night (equivalent to 10 on the clock). Every night after 20: 00, we can see the Big Dipper sinking into the west and the W-shaped Cassiopeia rising into the sky. Instead of the Big Dipper, she undertook the task of finding the coordinates of the North Star and navigating for the stargazers. The quadrilateral Pegasus is facing the sky, Orion, a symbol of the winter starry sky, and has been explored on the eastern horizon.

Entering this solar term, the northwest wind began to become a frequent visitor in China, and the temperature gradually dropped below 0℃, but the earth was not too cold. Although it began to snow, the amount of snow was not large, so it was called light snow. At this time, Yin Qi fell and Yang Qi rose, which led to the impassability of heaven and earth, the imbalance of yin and yang, the loss of vitality of everything, and the occlusion of heaven and earth into the severe winter. The first snow will appear in the area north of the Yellow River, reminding people that it is time to keep out the cold and keep warm.

Baidu encyclopedia-Xiaoyangchun Baidu encyclopedia-beginning of winter

Baidu Encyclopedia-Xiao Xue