Knowledge of hyperthermia in summer

The knowledge about summer heat treatment is as follows:

Long summer is the 14th solar term among the 24 solar terms, and autumn is the second solar term. Dou Zhiwu (Southwest); The solar meridian reaches150; August 22-24 of the Gregorian calendar every year. Summer has arrived, which is the "last summer" in the "three summers" of hot and hot weather, which means that the hot and difficult weather is coming to an end.

After the summer heat, the direct point of the sun continued to move southward, the solar radiation weakened, the subtropical high retreated southward, and the summer heat gradually disappeared. Thunderstorm activity is not as active as summer, and the general trend of rainstorm in all parts of the country is weakened. 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. ?

Entering summer is a solar term that reflects the change of temperature. The original meaning of "going out" means "stopping" and "staying". Shuo Wen Jie Zi says, "Stop." "Summer heat" means that the unbearable hot weather has ended and the summer heat has begun to fade. Both "three summers" and "three volts" represent hot and humid weather, and the curves on the time axis and the temperature axis are basically the same: summer is coming, summer is coming; When the sky falls, summer is over.

There are "three summers" in the 24 solar terms, namely, little summer, big summer and long summer, followed by early summer, heatstroke and late summer. There is also a "beginning of autumn" solar term in the middle of the "Three Summers". After beginning of autumn, it is summer, and the heat lasts for a long time. Long-term intense heat is beneficial to the growth and yield of crops. The ancients called the period from beginning of autumn to the autumnal equinox "long summer".

Meteorological change

In summer, that is, "out of summer", the high temperature will gradually withdraw. After the summer, the direct point of the sun continued to move southward, the solar radiation weakened, and the subtropical high retreated southward. As the height of the sun decreases, the heat it brings also decreases. The arrival of summer means that the hot and difficult weather is over. During this period, the weather is still hot, but it has shown a downward trend.

After summer, the temperature gradually decreases and the temperature difference between day and night gradually increases, but the temperature is still high during the day. The reasons for this phenomenon are as follows: first, the direct point of the sun continues to move southward, and the solar radiation weakens; Second, the subtropical high moved southward by leaps and bounds, and the Mongolian cold high began to itch to try.