The origin and meaning of summer heat

Brief introduction to the origin of summer heat

Being in summer is the fourteenth of the twenty-four solar terms. Dou Zhiwu (Southwest); The solar calendar is150; August 22-24 of the Gregorian calendar every year. "Out" means termination, and the summer heat means the end of the summer heat. The dog days have passed or will soon end. Due to the influence of short-term reheating weather (commonly known as "autumn tiger"), there is still continuous high temperature after the summer heat, and it will feel sultry. The weather will change from hot to sultry, and it will generally be cool around the Millennium.

Summer solar terms are in the period of short-term high-temperature weather (autumn tiger), which generally occurs between August and September in the Gregorian calendar. The duration of autumn tigers generally ranges from half a month to two months. The significance of summer heat in daily life is to remind people that autumn is coming quietly, and we should pay attention to preventing "autumn dryness" The solar term in summer also means entering the autumn in the meteorological sense. There are many folk activities in summer, such as eating ducks, setting off river lanterns, opening fishing festivals, decocting medicinal tea and offering sacrifices to the land.

Interpretation of the Summer Meaning in 24 solar terms

Being in the heat is "out of the heat", that is, out of the heat. The bucket handle of the Big Dipper points southwest (position E). When the sun reaches the longitude 150, it is the summer heat in 24 solar terms. Summer is a solar term reflecting climate change. "Chu" means to hide and die, and "early summer" means that the hot summer has passed. Due to the short-term regenerative weather of "autumn tiger", there is still continuous high temperature after the heat. Although it is not as hot as summer, it will still be muggy and dry, and the weather will change from hot to muggy. Being in summer is not only different from mild summer heat and severe summer heat, but also different from mild cold and severe cold solar terms. This is a solar term, representing the change of climate from hot to sultry. The weather is characterized by dryness and sultry weather. The arrival of the hot summer also means entering the second half of the dry calendar.

In summer, the direct point of the sun has moved from 23 26' north latitude to1128' north latitude. In the downtown area of Beijing, the height of the sun dropped from 73 32' in summer to 665 438+0 34' at noon, and people could clearly feel that the sun began to turn south. As the height of the sun decreases, the heat it brings will also decrease. The hot summer has passed, but there will still be short-term reheat weather during this period, but it has not really entered cool weather. True coolness usually comes around the Millennium.

In ancient China, the solar terms divided by the method of leveling qi divided the summer into three periods: "First, the eagle sacrificed birds;" Second, wait for the beginning of heaven and earth; Three Hou Wonaideng. " In this solar term, eagles began to prey on birds in large numbers; Everything between heaven and earth began to wither; "Henaideng" refers to millet, millet, rice and sorghum crops, and "Deng" means maturity.