The four hottest cities in China.

The four hottest cities in China are Wuhan, Nanjing, Chongqing and Changsha.

In the analysis and research of the new four stoves and "hot cities" released in 2022, the factors considered include thermal index, high temperature days, continuous high temperature days, average maximum and minimum temperature in summer, etc.

Scientifically, the hot degree of a city is measured by the number of days with high temperature above 35℃ and the combination of extreme high temperature value and relative humidity. The days with the highest temperature above 35℃ in a year are more than 20 days, and there have been high temperature weather above 40℃. Everyone calls such a city a "stove".

Nanjing, Chongqing, Wuhan, Nanchang and other cities do rank first every year. According to statistics, the average annual high-temperature weather above 35℃ in four major cities is 19.3 days, and the average annual high-temperature weather above 37℃ is 4.5 days. The annual average minimum temperature above 28℃ at night is 13.2 days, and the annual average minimum temperature above 30℃ is10.9 days.

Reasons for the formation of furnace city:

Cities in the middle and lower reaches of the Yangtze River, such as Chongqing, Wuhan and Nanjing, are often sultry in summer, mainly controlled by the western Pacific subtropical high, and maintain high temperature and humidity for a long time. Especially in the middle and late July and early August, the subtropical high is generally maintained in the middle and lower reaches of the Yangtze River and its vicinity, making these areas sweltering.

With the rapid development of industrial economy, the burning of fossil energy such as oil and coal and the emission of greenhouse gas carbon dioxide, the price reduction of cars and the change of lifestyle, more and more people buy cars instead of walking; Coupled with the popularity of air conditioning, these are releasing a lot of hot air into the atmosphere.

Urban population, high-rise buildings and dense roads. Concrete and asphalt pavement make the solar radiation heat up rapidly, and the heat island effect becomes more and more obvious. The temperature of the city is rising gradually, and more and more "stove" cities are emerging. This is also a realistic example of the rapid change and warming of the earth's environment caused by uncontrolled human activities.

Baidu Encyclopedia-Four Fireplaces