What are the four "stoves" in China?

Chongqing, Wuhan, Nanjing and Nanchang

Four big cities with hot summer climate are called "Four Fireplaces"

The term "Fireplaces" first reflects the intuitive feelings of the public, and there is no clear definition and standard for a long time. After the 21st century, stove cities began to take heat index, high temperature days, continuous high temperature days, summer average maximum temperature and minimum temperature as the consideration factors.

in p>21, four new stoves were updated, namely, Chongqing, Fuzhou, Hangzhou and Nanchang. Weibo, the official city of china weather tv, has also released a new ranking of stove cities in China, and the top 15 are Fuzhou,

Chongqing,

Hangzhou,

Haikou,

Changsha,

Nanchang, Wuhan,

Nanning, Xi 'an, Guangzhou, Shijiazhuang, Zhengzhou,

Hefei, Nanjing, Jinan and Shanghai.

Due to the changes of atmospheric circulation and other factors, furnace cities began to change, and the daily increase of high temperature in some areas was obvious. Some cities began to plant trees continuously, and the heat degree represented by Nanjing in traditional stoves was gradually reduced compared with other cities in Jiangnan and South China.

The reason:

The heat of Chongqing originates from the terrain, and the "Chongqing Furnace" is an alchemy of Laoshan, which is a famous high temperature area in midsummer in China. Experts believe that the rainy summer in mountain cities is the result of industrialization, and the increase of industrial emissions (sulfur dioxide, tiny dust, etc.) affects solar radiation, which leads to the increase of precipitation and the relative decrease of high temperature days. Such "artificial rainfall" is an "unexpected harvest" of environmental pollution to a certain extent. Chongqing, Wuhan, Nanjing and other cities in the middle and lower reaches of the Yangtze River are often as sultry as stoves in summer, mainly because summer is controlled by the subtropical high in the western Pacific Ocean and maintains high temperature and high humidity for a long time. Especially in the middle and late July and the middle 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.

Jiangcheng Wuhan can be called "the first generation of furnace chief". There are many rivers and lakes here, and a lot of water vapor evaporates, and the whole city is covered by clouds of hot air. On the one hand, it slows down the radiation speed of ground heat into the air, on the other hand, it makes the surface of the human body difficult to dissipate heat, just like a sauna, sweating like pulp and sultry. On a certain day in 1934, the record of 41.3℃ in Wuhan won the title of "Furnace Chief" for Jiangcheng.

Nanjing has won the essence of "Summer 99" in the south of the Yangtze River: keep your fans away and sweat like taking a bath. The high temperatures in Nanjing and Shanghai are comparable, but the coastal terrain in Shanghai makes Nanjing feel inferior. Because of the air pressure difference between land and sea, Shanghai is much cooler than Nanjing at night. Although the daily maximum temperatures in the two places are similar, the average daily temperature in Shanghai is relatively low.