Is the summer solstice the day with the longest day? Where is the longest day?
The summer solstice is one of the 24 solar terms in my country. The ancients often carried out production, labor and life according to the solar terms, which shows that these days have obvious climatic characteristics. So is the summer solstice the day with the longest daytime? Let’s find out together. The fifth month of the lunar calendar in 2018 also ushered in summer. Follow the fortune teller website and spend a long summer with you.Is the summer solstice the day with the longest day?The summer solstice is the day with the longest daylight hours in the Northern Hemisphere countries;Every year on June 21 or 22, the sun reaches 90 degrees of ecliptic longitude, marking the summer solstice. This solar term was first established in the Spring and Autumn Period from 722 BC to 481 BC. Scientifically speaking, on the summer solstice, the sun's direct position above the ground reaches its northernmost point of the year, almost directly above the Tropic of Cancer (23 degrees 27 minutes north latitude). The daylight in the northern hemisphere reaches its longest, and the further north you go, the longer it gets. The day length in Haikou is a little over 13 hours, in Hangzhou it is 14 hours, in Beijing it is about 15 hours, and in Mohe, Heilongjiang it can reach more than 17 hours. After the summer solstice, the position of direct sunlight on the ground gradually moves southward, and the daytime in the northern hemisphere becomes shorter. There is a saying among the people that "After eating summer solstice noodles, the day will be one line shorter." After the "Summer Solstice", except for some areas without summer all year round in the Qinghai-Tibet Plateau, Northeast China, Inner Mongolia and Yunnan provinces and regions, the average daily temperature in various parts of my country generally rises to above 22"C, which is the real summer in phenology. Among the folks, people divide the 15 days after the Summer Solstice into 3 "times", usually 3 days in the first time, 5 days in the middle time, and 7 days in the last time. The higher temperature and sufficient sunlight at this time make summer crops such as rice grow very vigorously, and the demand for water and fertilizer of crops is also high. "Rice needs to drink the water of the Summer Solstice", "If it rains at the Summer Solstice, there will be rice in the warehouse", "A drop of rain at the Summer Solstice is worth a thousand gold", "If it rains at the Summer Solstice, it is like a scholar passing the imperial examination" and other agricultural proverbs illustrate the extreme importance of sufficient water to the growth of crops at this time. It is recorded in "Jingchu Sui Shi Ji": "There must be three times of rain in June, and the farmers will think it is a sweet dew, and the townspeople will congratulate each other. "It can be seen that our ancestors more than a thousand years ago had a clear understanding of the importance of rainfall during the summer solstice. |
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