What does "great summer heat" mean?

Great summer heat: it is one of the 24 solar terms.

Major Heat

Meaning: The hottest period of the year.

Season: summer

Climate characteristics: high temperature and extreme heat.

Arrival time: July 22-24 in Gregorian calendar every year.

Origin:

The summer heat is the twelfth of the twenty-four solar terms, and it is also the second half of the dry calendar; When the sun reaches longitude 120. But the exact date on the lunar calendar is not fixed every year, because the lunar calendar is the lunar calendar.

"Twenty-four solar terms": "In mid-June, see the light summer heat". "Tongwei Filial Piety Helps the Gods": "The fifteenth day of Xia Hou is not summer, but mid-June. The small ones and the big ones are extremely hot, and they are divided into sizes. It was small at first, and it became big after reading it. "

Weather characteristics:

Summer solar terms are the period with the most sunshine and the highest temperature in South China, the period with the richest precipitation, the most common thunderstorms and the most concentrated days with high temperature above 30℃ in the west of South China, and the period with the most frequent high temperature above 35℃ in the east of South China.

The summer heat is also the season with the most thunderstorms. There is a proverb that says, "Without a drop of lightning in the east, the west can't walk", which means that if there is lightning in the east in summer afternoon, it won't rain here. If lightning is in the west, it will come soon, and it is too late to hide.

The high temperature during the hot summer is a normal climate phenomenon. At this time, if the light is insufficient, the growth of warm crops such as rice and cotton will be affected. However, the continuous high temperature weather for a long time is very unfavorable to the growth of crops such as rice. There is an agricultural proverb in the middle and lower reaches of the Yangtze River: "It is a bit dry if it doesn't rain for five days, a bit dry if it doesn't rain for ten days, and it doesn't rain in January." It can be seen that high temperature and little rain are the conditions for the formation of summer drought, and the harm of continuous large-scale high temperature drought in summer drought areas is sometimes greater than local floods. In addition to drought prevention in the middle and lower reaches of the Yangtze River, it is also necessary to prevent drought in Shaanxi-Gansu-Ningxia and the eastern part of southwest China, especially in eastern Sichuan and Chongqing.