Causes of high temperature weather in Sichuan

"The reason for the hot weather in Sichuan is mainly related to the long-term control of mainland high pressure over Sichuan. There is a downward airflow in the atmosphere. When the air mass sinks, the upper air pressure is low and the lower air pressure is high, and the air mass will be compressed, resulting in an increase in its internal energy and temperature, and clear sky radiation will push the temperature up. "

The North Africa-Iranian high will develop eastward and merge with the continental high, forming an unusually strong warm high in the western plateau of China. July 6-8 will bring violent high temperature weather to the northwest and Sichuan basin. In the future, North Africa-Iran high and continental high may even be integrated with subtropical high, resulting in a wide range of high temperatures.

In addition to Sichuan, since July 6, high temperature weather above 35℃ has also appeared in Xinjiang, the eastern part of northwest China, the eastern part of southwest China, North China, Huanghuai and Zhejiang.