Why is the weather temperature so high in Zhengzhou?

Furnace City is the name of a city with hot summer weather in China, which is generally concentrated in the Yangtze River valley in the south of China.

"Three stoves" means that Chongqing, Wuhan and Nanjing in the south of China were famous cities along the Yangtze River during the Republic of China, and the temperature was hot in summer, so they were called "three stoves".

Four stoves: Chongqing, Wuhan, Nanjing and Changsha in the Yangtze River valley in the south of China, which are called "four stoves" because of its hot summer climate and long duration of hot summer weather.

Seven stoves: Chongqing, Wuhan, Nanjing, Changsha, Hangzhou, Nanchang and Shanghai in the latitude south of the Yangtze River are hot in summer, and the densely populated provincial capital cities are called "seven stoves". The saying that the distribution originated from the kitchen city originated from the people, and the temperature has no statistical basis. In recent years, in addition to Yunnan-Guizhou Plateau, many southern cities in the latitude region of the Yangtze River basin in southern China have experienced high temperature and long-lasting hot and humid weather.

In addition, the northern cities such as Beijing, Tianjin, Shijiazhuang, Tai and An in the latitude area of the Yellow River in North China have recently experienced a rare high temperature trend in history. The frequent occurrence of extreme weather and the expansion of high temperature areas have aroused people's concern about the environment and reflection on the impact of human activities on nature.

Song Yingjie ranks the top ten cities in China according to the total number of hot days in recent 10 years (2000 -2009). In the past 10 years, the total number of high temperature days (temperature exceeding 35℃) in these cities all exceeded 200 days, and five of them exceeded 300 days. Fuzhou, a city in Fujian, ranked first with 375 high temperature days of 10, followed by Hangzhou (355 high temperature days), Chongqing (343 high temperature days) and Changsha (326 high temperature days). Wuhan 10 has 305 high temperature days, with an average of 30.5 days, ranking fifth. The cities ranked sixth to tenth are Haikou, Nanchang, Guangzhou, Xi and Nanning. Traditionally, Wuhan has been listed among the four "stove" cities; Although the other three cities on the list have different opinions, Wuhan can't escape the reputation of "stove" city. However, according to the statistics released by Song Yingjie, Wuhan was excluded from the "four furnaces". Most of the cities in the top 10 list are located in the Yangtze River basin in the south of China and its south area, with the exception of Xi. Surprisingly, Xi 'an, an ancient capital located in the northwest, entered this list, which is related to its geographical position in Guanzhong Basin in western China. In summer, hot air is surrounded by mountains, so it is difficult to convection.

Wuhan Shijiazhuang Jinan Zhengzhou Taiyuan also belongs to the Central Plains furnace city.