[Well -off headline] This year's climate "deep water", high temperature weather may be normalized

Since June 13, my country has emerged for the first regional high -temperature weather process this year. It has a wide range, long duration, strong extremes, and great influence. As of July 12, high temperature time has continued for 30 days.

At the same time as high -temperature heat waves in many places, since the flood in the flood this year, my country has more floods, especially in the southern rainstorm process and high precipitation intensity. Among them, the rainfall shows the characteristics of the two rain belts from the north and the south. In the south, the precipitation in the Pearl River Basin is the most in history. In the north, the precipitation in the Liaoshe Basin is the second most in history.

Experts predict that it is expected that in the summer of this year, the probability of extreme heavy precipitation will have a greater probability. At the same time, extreme high temperature events may occur in some areas.

Why is the recent extreme high temperature weather frequently?

Wang Jun, an associate researcher at the Institute of Atmospheric Physics of the Chinese Academy of Sciences, told China News Weekly that "the maintenance of large -scale high -voltage abnormalities is the most direct reason for the recent extreme high temperature in my country". Take Sichuan as an example. Under the control of high -pressure systems It prevails to sink the air flow, and the air ball from high to low heat sinks to increase the temperature, resulting in a significant increase in near the ground temperature. At the same time, sinking the air flow caused the sunny and cloudy weather, and the solar radiation increased, which also increased the temperature of the ground. In addition, high temperatures will induce sudden drought in some areas, and the rapid decline in soil humidity will further exacerbate the intensity of high temperature, making it prone to high temperature weather at the highest temperature of the daily maximum temperature above 35 ° C.

In addition to the reasons for the abnormal atmospheric circulation, Zhang Lixia, an associate researcher at the Institute of Atmospheric Physics of the Chinese Academy of Sciences, reminded that the correlation between high temperature weather in China and other parts of the world.

Since mid -June this year, the northern hemisphere has continued to have high temperature heat waves in many places. The upstream areas of my country's weather system, especially in Europe, have continued to break through the historical record -June 13, the highest temperature in central and southern Spain exceeded 40 ° C; on the 18th, high temperatures in many places in France, more than 70 provinces released High -temperature warning; on the 19th, a record high -temperature weather occurred in Germany, and a forest fire occurred in Brandonburg.

According to the monitoring of the National Climate Center, in June of this year, the global average temperature was about 0.4 ° C higher than the usual year, the highest since 1979, of which northern Russia and western Europe were above 2 ° C. Compared with the same period of history, the highest temperature in Europe, East Asia, and North America has broken the historical extreme value in the same period in Europe, East Asia, and North America.

The highest temperature forecast in the country

Sanfu has entered the hottest period of the year

As the saying goes, "hot in three volts." Recently, extremely high temperatures in my country have appeared in many places. Some people even died of heat irritation, and they could not breathe before they entered. Yesterday, it has officially entered, marking the hottest three voltage of the year. This year's Sanfu is another 40 -day "long standby version". Sanfu Tian usually appears between the small summer and the summer heat. It is the highest temperature and humid and sultry period in the year. Fu, it means that the weather is too hot.

Global extreme weather may be normalized

The sixth evaluation report of the Special Committee of the United Nations Intergovernmental Climate Change (IPCC) pointed out that global warming in the past 50 years is at unprecedented speeds in the past 2000, and the unstable climate system has intensified. "All -human red alert".

The above report also pointed out that the greenhouse gas emissions caused by human activities are the main reasons for the increase in extreme high temperature and frequency increased by the world (very likely) and most mainland (likely). The impact of human activities on the extreme temperature strength, frequency, and duration of the region in China can significantly distinguish between natural changes.

Zhang Lixia, an associate researcher at the Institute of Atmospheric Physics of the Chinese Academy of Sciences, said that in addition to the greenhouse effect directly caused the atmospheric heating through the greenhouse effect, it can also increase the high temperature by affecting the atmospheric circulation. For example, the increase in greenhouse gases, the atmosphere becomes more stable, is not conducive to the occurrence of flow, the number of days without precipitation increases, and the risk of high temperature in summer is invisible. With the development of urbanization in my country, the intensity of urban hot island has increased significantly, which further promotes the trend of increased summer high temperature weather in some cities in my country.

Due to the direct result of the influence of the weather circulation, the scientific community tries to distinguish the effects of heat changes (global heating background) and power changes (large -scale circulation changes) on high temperature events. In response to the attribution of extreme high temperature in China in the past, the impact of the contribution of thermal changes on high temperature dominance, and the contribution of thermal changes to extreme high temperature events will increase with the extremes of the event.

Wang Jun, an associate researcher at the Institute of Atmospheric Physics of the Chinese Academy of Sciences, said that at present, extreme high -temperature weather in many regions in the world has occurred in the context of global warming. However, several extreme high -temperature weather cannot show that global warming is intensifying. Pay attention to this issue, you need to carefully analyze the trend of the global average temperature.

"But one thing is almost certain. As the global climate has further increased in the future, the probability and intensity of extreme high temperature weather will increase." Wang Jun said that when the global climate warms has reached a certain range in the future, some at present, some are currently some. Extreme high temperature weather may be normalized.

Zhou Bing, chief expert of the National Climate Center Climate Services, also mentioned in an interview with the media. The average annual temperature of different regions in China is expressed as an increase in trends. The temperature increase has certain regional characteristics. The temperature increase in the northern region is greater than the southern region. The average annual precipitation in China has increased. The average annual precipitation of China's region will increase by 6.5%to 7.2%in the mid -21st century, and most of them have increased precipitation in most areas. In the middle of middle emission scenarios, the west to eastern Xinjiang and southern, southern, and south of Hunan is the increase. Essence Authoritative answers to the National Health and Health Commission to answer thermal radiation disease

Recently, extreme high temperatures have appeared in many places in my country, and some people even died of fever. On July 10th, Sichuan West China Hospital was treated with three patients with fever, one of them died of severe illness, and two were sent to the intensive care unit for rescue. On the 15th, the National Health and Health Commission issued an authoritative answer to thermal irritation related questions.

Source: Xiaokang Headline Comprehensive China News Weekly, Weather Network, and National Health and Health Commission website

Edit: Wu Jinyang

School pair: Tian Yuan Yingying

Review: Gong Zimo

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