The highest temperature in many places breaks the pole value, experts explain the cause

Recently, high temperatures in many places in the north have been raging. In Xuchang, Henan, the high temperature weather over the past few days caused the cement pavement to break, and the road surface was bulging, which looked like just experienced an earthquake.

In fact, it is not only Henan. Since June 13, my country has emerged for the first regional high temperature process this year, with a wide range of influence. Ai Wanxiu, chief of the National Climate Center Climate Service Office, introduced that there are 26 national meteorological stations in Inner Mongolia, Xinjiang, Gansu, Ningxia, Shandong, Shanxi, Jiangsu and other places. protrude. On June 16, the highest temperature in 59 national meteorological stations in Henan Province reached or exceeded 40 ° C, of ​​which 11 stations exceeded 41 ° C, the highest temperature in Linzhou, Henan reached 42 ° C, and Henan dance steel was 40.9 ° C, which broke the record extreme record record. Essence

Why is this round of high -temperature weather so fierce? Yuan Yuan, a researcher at the National Climate Center's Climate Forecasting Office, said that since June, the conditions of the low -rise water vapor in Huanghuai areas have bias. In most areas, it is mainly on sunny, hot, rainy weather, and less precipitation. Especially after June 15th, high -pressure spine control over the Huanghuai area, and the sinking air flow caused a significant temperature increase effect. At the same time, due to the influence of the solar radiation during the day, the atmosphere was dry, and the ground quickly heated up. The fusion of these factors leads to high temperature weather in the local area.

Hu Xiao, the chief meteorological analyst of China Weather Network, also believes that this high temperature weather is mainly affected by the eastward and high pressure spine, which has caused the north to focus on sunny hot and rainy weather. In addition, due to short -wave radiation of the sun during the day. It is conducive to the gradual increase of ground temperature. The significant high temperature on the surface is mainly caused by strong sun radiation.

The latest report by the World Meteorological Organization (WMO) shows that the La Nina incident is currently ongoing at least in August, and the northern hemisphere may last until autumn and early winter. The La Nina incident has affected the temperature and precipitation mode, and exacerbated the drought and floods in different regions of the world. So, is the global high temperature caused by Lamina?

In this regard, Yuan Yuan explicitly pointed out that the slowly attenuation La Na incident is not the main reason for this round of global high temperature, but it affects the establishment of the East Asian summer season and the rainy season in my country, which has led to the outbreak of summer in the South China Sea, the former flood season in South China, and the rainy season in Southwest China. As well as Jiangnan and the middle and lower reaches of the Yangtze River, they have been earlier in the rainy season, and it also provides an important climate background for the flood disasters in the Pearl River Basin in the near future.

Yuan Yuan introduced that the La Nina incident, which began in the fall of 2021, continued, and the current attenuation was slow but slightly strengthened in May. The National Climate Center predicts that the Lanna incident has weakened slightly in summer. The summer equator in the Middle East Pacific in the summer may maintain weak cold water, but the sea temperature will develop again in autumn and winter this year.

As for whether there will be more extreme high temperatures this year, Yuan Yuan said that it is expected that in the midsummer (July -August), the southern region of my country is mainly in the central and eastern parts of Jiangnan and South China. process.

"In the context of global warming, in recent years, extreme weather and climate events have been frequent. It is necessary to pay special attention to the occurrence of extreme high temperatures and the adverse effects on people's production and life and energy supply, and take timely defense measures such as electricity protection. "Yuan Yuan suggested.

(Source: Science and Technology Daily reporter Fu Lili)

【Edit: Jinxin】

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