What is the Chushu solar term? What is the origin of the solar term End of Heat?
Introduction: The Beginning of Heat is the second solar term in autumn. Its arrival indicates that the summer heat is no longer so overbearing, but is gradually fading. So what is the Chushu solar term? What is the origin of the solar term End of Heat? Let’s follow the editor to learn more about it. Mr. Shui Mo has carefully compiled a special topic about the seventh month of the lunar calendar. Friends who want to know more about the seventh month of the lunar calendar can read the relevant articles in this topic for reference!What is the Chushu solar term?Chushu, which means "out of summer", means the heat is leaving. It is the 14th solar term among the 24 solar terms in the lunar calendar. It begins around August 23 in the Gregorian calendar, when the sun reaches 150° of the ecliptic longitude. The solar term of Chushu means that we are about to enter autumn in meteorological terms. After Chushu, the temperature in the areas north of the Yangtze River in China will gradually drop. Astronomical experts say that on the day of the Beginning of Autumn, the sun's direct point has moved southward from 23°26′ north latitude on the day of the Summer Solstice to 11°28′ north latitude. In urban Beijing, the length of daylight has been shortened from 15 hours at the summer solstice to 13 hours and 25 minutes. The altitude of the sun at noon has also dropped from 73°32′ at the summer solstice to 61°34′. People can clearly feel that the sun is beginning to move southward. As the sun's altitude continues to decrease, the heat it brings also weakens.What is the origin of the solar term End of Heat?According to the Collected Explanations of the 72 Seasonal Changes in the Lunar Calendar, "Chu" means to go away. The hot summer ends here. It means that the hot summer is about to pass. Although the average daily temperature in the vast areas east and south of Beijing, Taiyuan, Xi'an, Chengdu and Guiyang and the Tarim Basin in Xinjiang is still above 22 degrees Celsius around the Beginning of Autumn, it is still summer, but the number of cold air moving south increases and the temperature drop becomes gradually obvious. In ancient my country, the End of Heat was divided into three phases: "The first phase is when eagles offer sacrifices to birds; the second phase is when heaven and earth begin to be solemn; the third phase is when crops are harvested." During this solar term, eagles begin to hunt birds in large numbers; all things in the world begin to wither; the "禾" in "禾乃登" refers to the general term for crops such as millet, sorghum, rice, and sorghum, and "登" means maturity. The End of Heat is a solar term that reflects the change in temperature. "Chu" means hiding or ending, and "Chushu" means the end of the hot summer days. In other words, the hot summer is about to pass and it's over. After the End of Heat, except for South China and Southwest China, the rainy season in most parts of my country is about to end, and precipitation is gradually decreasing. In particular, North China, Northeast China and Northwest China must hurry up to store water and maintain embankments to prevent drought during the autumn planting period and delay the sowing period of winter crops.Summary: Through the above article, we know the definition of what the Chushu solar term is and the origin of the solar term Chushu. I hope it can help friends in need! |
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