Phenological characteristics of heat treatment in summer

Temperature drop, crisp autumn, thunderstorm activity;

1, temperature drop

It is not enough to describe the solar terms in summer simply by the beginning of temperature drop. Temperature drop is just one of the phenomena. The reasons behind this phenomenon are as follows: first, the direct point of the sun continues to move southward, and the solar radiation weakens; Secondly, the subtropical high moved southward by leaps and bounds, and the Mongolian cold high began to be eager to try and show good intentions.

2. Autumn is crisp

Under the control of the cold high pressure that began to affect our country, the sinking and dry cold air first announced the end of the rainy season in Northeast China, North China and Northwest China, and took the lead in starting the best weather in a year-crisp autumn.

In summer, only the northeast and northwest regions really enter autumn. But whenever cold air affects China, if the air is dry, it will often bring windy weather, and if there is warm and humid airflow in the atmosphere, it will often form a decent autumn rain.

3. Thunderstorm activity

Thunderstorms are not as active as in summer, but there are still many thunderstorms in South China, Southwest China and West China. In the south of China, there are more thunderstorms than in other places because the warm and humid airflow at low latitudes is still active. In the southwest and west, there are more thunderstorm activities due to the subtropical high edge and mountains.

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.