What are the characteristics of summer heat?
1, autumn tiger
Although the summer is after beginning of autumn, at the end of the summer, people usually feel the hot weather again, which is called "autumn tiger". In the middle and lower reaches of the Yangtze River, it is often after the autumn tiger weather is over that the autumn sunny spring will be ushered in.
2. The temperature drops
Every year from the end of August to the beginning of September, the lower temperature is one of the phenomena of summer solar terms. The reason for this phenomenon is that the direct point of the sun continues to move southward, and the solar radiation is weakened. At the same time, it is also affected by the leaping retreat of the subtropical high to the south.
3. Autumn is crisp
After the summer, people will feel more obvious cooling, and there may be a larger precipitation process, so there is a saying that "an autumn rain (wind) is a cold". Because the temperature drops obviously and the temperature difference between day and night increases, people are often not very adapted to the cold and hot changes at the turn of summer and autumn, and it is easy to cause diseases such as respiratory tract, gastroenteritis and colds, so it is called "eventful autumn".
4. Thunderstorm activity
During the summer solar term, thunderstorm activity is not as active as that in summer, but there are still many thunderstorms in South China, Southwest China and West China. Most of our country began to enter a period of little rain, while there was more autumn rain in West China, mainly continuous drizzle.
What are the characteristics of summer solar terms?
Different solar terms have different solar terms characteristics. The summer solar term is a solar term that reflects the temperature change. "Chu" means hiding and ending, and "Chu Xia" means that the hot summer is over, which means that the hot summer is about to pass, and the heat is over. In ancient China, the summer heat was divided into three stages: "The eagle is a sacrificial bird; Second, wait for the earth to stop; Sanhou Wo Naideng. " This means that the eagle began to hunt a large number of birds in the summer solar terms; Everything between heaven and earth began to wither; "Wo Naideng" is the general term for millet, millet, rice and sorghum crops, and "Deng" means maturity. After the summer heat, the temperature in most parts of China has gradually dropped, and the summer heat is no longer pressing.
In the summer, as the direct point of the sun continued to move southward, the solar radiation weakened, the subtropical high retreated southward by leaps and bounds, and the Mongolian cold high began to appear, making northeast, north and northwest China take the lead in entering autumn. In South China, especially in the low-altitude areas along the Yangtze River, the highest temperature is often higher than 30°C, and people will feel the afterglow of the "autumn tiger".