Air flow in summer dry season

There are three reasons for the "stove": First, the middle and lower reaches of the Yangtze River have vast water surface, numerous rivers and lakes, high air humidity and slow evaporation, so it is difficult to cool down by evaporation, so it is often sweaty and sultry; Second, July and August are in the middle and lower reaches of the Yangtze River (while northeast, north, southwest and south China are all rainy seasons at this time). Wan Li is often sunny, the sun is like fire, and the temperature rises suddenly. Third, there is often no wind in midsummer in the middle and lower reaches of the Yangtze River. Breeze can slowly make people feel the summer heat disappear, but on the hot day of "Sanzao", it is precisely this cool breeze that makes people feel particularly hot.

1. Nanjing

Nanjing is located in the southwest of Jiangsu Province, close to the Yangtze River, and is the intersection of railway lines such as Lipu, Shanghai-Nanjing and Nanjing-Copper. Here, the average number of days of intense heat (above 32℃) is 62.6, and the number of days of intense heat (above 37℃) is 9.4.

2. Wuhan

Wuhan is located in the east of central Hubei Province, where the Yangtze River and the Han River meet. The Beijing-Guangzhou Railway passes through the city, and the two railways, Han (Wuhan to Danjiang) and Wuda (Wuhan to Huangshi), meet here. Lakes are everywhere, and the vast water surface increases the water vapor in the atmosphere and raises the temperature. Here, the annual average days of intense heat (above 32℃) are 7 1.2 days, and the days of intense heat (above 37℃) are 12 days.

3. Chongqing

Chongqing is located at the intersection of the Yangtze River and Jialing River, where Chengdu-Chongqing, Sichuan-Guizhou and Xiangling railways meet. Here, the annual average number of days of hot summer (above 32℃) is 77.2 days, and the number of days of high temperature is140 (above 37℃) is 26.4 days, making it the longest city among the three "stoves".

1 >. All three stoves are caused by hot and humid air in summer, which is particularly sultry.

2 >. However, the causes are still different: a. Nanjing is often in the center of subtropical high in summer; B. Wuhan is often covered by water vapor because the water network is particularly dense; C. Chongqing is the terrain, which makes the whole Chongqing seem to be in a big steamer.