What did the summer with long summer solar terms mean in ancient times?

In ancient times, summer in the long summer solar term meant growing up.

Xia is called "Chang Ying" in Er Ya; Win, take the meaning of "full" and "profit" Long summer is an important solar term, marking the peak season for the growth of all things. Everything grew up here, hence the name Long Summer. Regarding the long summer, the 24 solar terms of Yuan Dynasty poet Wu Cheng are interpreted as: "Summer is false, and everything is false at this time."

"False" or "big" here means that the plants in spring have grown up by this time. After the long summer officially entered the rainy season, rainfall and rainy days increased significantly. Spring, long summer, autumn harvest and winter storage are the best seasons for many crops to grow vigorously. Adequate light, suitable temperature and abundant rain provide necessary conditions for plants. Everything is thriving, starting in the long summer.

Long summer is the beginning of summer, and the so-called "standing" is the beginning. Beginning of spring, Changxia, beginning of autumn and beginning of winter represent the beginning and arrival of spring, summer, autumn and winter respectively. In order to express the characteristics of time series more accurately, the ancients divided the solar terms into four groups according to the weather and phenology: divided, arrived, opened and closed. "Fen" means vernal equinox and autumnal equinox, which is called "dichotomy" in ancient times.

Meteorological changes of solar terms in long summer;

One of the climatic characteristics of the long summer solar terms is the obvious increase of showers and thunderstorms. The increase and intensity of precipitation are caused by the confrontation between cold and warm air and the convective weather caused by the rise of warm and humid air near the ground. Long summer is an important solar term, marking the peak season for the growth of all things. According to the classification standard of modern climatology (climate average temperature) in China, the daily average temperature rises steadily to above 22℃, starting in summer.

Before the arrival of the long summer solar term, the scope of spring in China reached its peak. Except Hainan, Guangdong, Guangxi, south-central Jiangxi, southern Hunan and Fujian, it was summer, and most other areas were still spring. The arrival of the long summer symbolizes the beginning of the dormant summer, which begins to advance northward and reach North China.

After the long summer officially entered the rainy season, rainfall and rainy days increased significantly. Summer is the best season for many crops to grow vigorously. Adequate light, suitable temperature and abundant rain provide necessary conditions for plants.