The meaning of great summer heat

Great summer heat means "great heat" In ancient books, summer heat and heat are also divided into big summer heat and small summer heat, small summer heat at the beginning of the month, big summer heat in the middle of the month, and big summer heat today.

The ancients divided the summer heat into three periods: "The rotten grass in the first period was firefly; Second, wait for the soil to moisten and cool off the heat; It will be fine when it rains. "

1. When rotten grass turns into fireflies, fireflies ovulate at high temperature. The ancients thought that fireflies were made of rotten grass. Fireflies, also known as "candlelight night" and "bright night", are poetic insects that welcome autumn in summer. When fireflies shuttle in the quiet night, the cool autumn is not far away.

2. The second moist soil: the weather began to be sultry and the land was very humid. The weather is humid, and in the heat, the humidity is heavy and the heat is unbearable. Liu Xi of the Eastern Han Dynasty said, "Summer boils, internal heat descends, and the sun fumigates with damp heat. If people are in a steamer, their qi is extremely dirty, also known as' dirty heat'. " .

3. When it rains three times: In summer, due to the accumulation of moisture, it often rains heavily and there are often thunderstorms.

The moral of great summer heat

The hottest period of the year.

Climatic characteristics of summer heat: high temperature, damp heat and frequent thunderstorms. High temperature and rainy, rain and heat at the same time, is conducive to crop growth. Yi Zhoushu said: "The earth is humid and hot (hot, which means humid and sultry). In five days, when it rains "; He also said, "Heavy rain comes from time to time, and the country is ungrateful." The summer heat is the period with the most sunshine, the highest temperature and the most rain in a year, and it is a solar term with thunderstorm weather.

Because solar radiation and atmospheric warming have two links, they are affected by many factors.

1, solar radiation warms the surface;

2. Ground radiation warms the atmosphere. Both links need time to reach the maximum, so the appearance of the highest temperature in the atmosphere will be delayed.

There are many factors in the process of the above two links. Among the many factors that affect atmospheric warming, the most important is weather conditions, less rainfall, sunny weather and high atmospheric temperature. From the summer solstice, the surface absorbs heat and the temperature keeps rising, and it is not until the summer heat that the temperature rises to the highest.