China Weather Network News Hot hot hot!

Recently, the temperature in southern my country is full of firepower. The maximum temperature of 40°C+ is matched with 30°C+ night temperature. It is too hot to cook day and night.

Netizens said: Jiangsu, Zhejiang and Shanghai have become "industrial households", Chongqing has changed from "stove" to "melting furnace", and all the people walking on the road are "acquaintances"... How strong is this round of high temperature in the south?

How long will it last in the future?

What is the reason for such a rare high temperature process this year?

China Weather Network will answer them one by one for you.

1. How strong is this round of high temperature process in the south?

　　Monitoring by the National Climate Center shows that since June 13, a regional high-temperature weather process has occurred in my country, with a wide range, long duration, strong extremes and great influence.

As of July 12, the high temperature event has lasted for 30 days, covering a land area of ​​5.021 million square kilometers and affecting more than 900 million people.

The distribution of extreme maximum temperatures in China from June 13 to July 12, 2022 (Source: National Climate Center)

　　Especially since July 7, the high temperature in the south has suddenly emerged. The Jiangsu, Zhejiang, Shanghai and Sichuan-Chongqing areas have become the national high temperature centers. High temperatures above 40°C have occurred in many places, and the historical records of high temperatures have been frequently broken.

Shanghai:

The temperature at Xujiahui Station reached 40.9°C on July 13, tying the highest value in the observation history of Xujiahui Station since 1873.

From July 5th to the present (July 14th), the highest temperature in Shanghai has exceeded 35°C for 10 consecutive days, of which 3 days exceeded 40°C, and three 40°C+ occurred in early and mid-July, which is the first time in the history of Shanghai.

Chongqing:

On July 10, the high temperature in Chongqing climbed to 40°C, and since then the high temperature has not dropped. As of today, the temperature has exceeded 40°C for 5 consecutive days.

In addition, the heat in Chongqing is not divided into day and night. On the morning of the 13th, the minimum temperature in Shapingba, Chongqing was 33°C, and on the 14th, it was 33.2°C, setting the highest record for the local minimum temperature for two consecutive days.

Zhejiang:

From June 26 to July 12, the number of high-temperature days in central and northern Zhejiang broke the record for the same period in history, and the extreme maximum temperature occurred in Yuyao, reaching 41.6 ℃.

On July 12, the temperature in Hangzhou exceeded 40°C, setting the earliest record for a high temperature of 40°C.

Zhejiang Province issued 54 high-temperature red warnings on the same day, breaking the record for the highest number of high-temperature red warnings issued on a day.

Jiangsu:

On July 12, Jiangsu issued the first high-temperature red warning this year. High temperatures continued in most parts of the province. As of 16:00 that day, 284 towns (streets) exceeded 40°C, with a maximum of 43°C, which appeared in Jinchang, Suzhou. street.

　　Affected by the high temperature, heat stroke and heat stroke are common in various places.

According to incomplete statistics, since July, many people in Zhejiang, Jiangsu, Sichuan and other places have been diagnosed with heat stroke, and some people have died from it.

2. Why is this round of high temperature in the south so fierce?

　　Wang Weiyue, a meteorological analyst at China Weather Network, said that the strong solar radiation and the strong subtropical high pressure are the driving forces behind this round of high temperature and hot weather in the south.

Generally speaking, the subtropical high pressure prevails with downdraft air, it is sunny and less rainy, and more solar radiation can reach the ground, making the ground and near-surface atmosphere gain more heat, just like covering the ground with a big steamer.

At present, the position of the subtropical high is more norther than the same period of the previous years, and its intensity is also stronger, and it has controlled the eastern Sichuan Basin to Jiangnan, northern South China and other places for a long time.

In addition, the warm and humid airflow is strong, the air humidity is high, the temperature rises violently, and the body feels steamed and boiled, and the heat is unbearable.

　　The National Climate Center said that the ongoing La Niña event has provided important climatic background conditions for the occurrence and development of high temperature in the south since June this year, especially in July, the development of the mid-latitude warm high pressure belt has strengthened, resulting in a wide range of high temperature weather.

According to statistical analysis, in the summer following most La Niña events, the subtropical high in the western Pacific tends to move northward.

3. When will the high temperature in the south be relieved?

　　Since July 6, the Central Meteorological Observatory has issued a high temperature warning for 9 consecutive days.

It is expected that from today to the 17th, the high temperature, fine and hot weather in the eastern Sichuan Basin, Jianghuai, Jianghan, Jiangnan, South China and other places will continue.

　　From the 17th, there will be rainfall in the Sichuan Basin, and the high temperature weather will weaken.

On the 18th, the surrounding areas of the Yangtze River Delta may usher in rainfall, and the high temperature weather has eased, but the high temperature and muggy weather will continue in the southeast of Jiangnan and eastern South China.

After the 21st, the high temperature in the southern region will develop again and the scope will expand. The daily maximum temperature in Fujian, Jiangxi, southern Zhejiang and other places can reach 39 to 41 °C.

　　The National Climate Center predicts that from July 27 to August 11, the temperature in most parts of my country will be higher than the same period of the year, including western Inner Mongolia, Shanghai, Jiangsu, northern Zhejiang, Anhui, northern Jiangxi, southern Shandong, most of Henan, Hubei , northern Hunan, Chongqing, eastern Sichuan, northern Guizhou, Tibet, southern Shaanxi, northern Xinjiang and other places are 1-2 ℃ higher.

The number of high-temperature days in some of the above-mentioned areas is relatively high, and there may be high-temperature weather processes that last for a long time. It is necessary to prevent the adverse effects of high-temperature heat waves on people's production and life and power supply.

4. Why is it not a joke to say "hot dead"?

　　Rarely high temperatures occur frequently, and many people in Zhejiang, Sichuan, Jiangsu and other places have been diagnosed with heat stroke, which reminds everyone that "hot people" in summer are really no joke.

　　According to Red Star News, on July 10, West China Hospital of Sichuan University admitted three consecutive heat stroke referral patients. One of them suffered from respiratory cardiac arrest when he was referred to West China Hospital due to his aggressive condition and multiple organ failure. , despite all efforts to rescue, but unfortunately died in the end.

　　According to The Paper, a 49-year-old male patient was sent to Lishui Central Hospital in Zhejiang Province on July 6. He suddenly passed out while working in the workshop, and his body temperature was 40.7°C when he was admitted to the hospital.

After examination, the patient was found to have multiple organ failure and disseminated intravascular coagulation. After 31 hours of rescue, he died in the early morning of the 8th.

　　The popular explanation of heat stroke is the most dangerous and severe heat stroke. It can lead to systemic problems such as central nervous system, muscle tissue, blood coagulation, liver and kidney function, respiratory function, cardiovascular function, etc., and can easily lead to multiple organ failure. The fatality rate of heat stroke ranges from 20% to 70%, and can be as high as 80% in elderly patients.

　　Since the late 1990s, my country's high temperature weather has shown a significant increase, and it is not uncommon for people to die due to high temperature.

　　In the summer of 2003, high temperatures of 38-40°C occurred in the middle and lower reaches of the Yangtze River, northern South China, eastern Sichuan, and Chongqing, with extreme maximum temperatures reaching 40-43°C in some areas.

Continued high temperature has significantly increased the number of people suffering from heat stroke. According to the Jinling Evening News, the average daily number of people suffering from heat stroke in Nanjing reached 300 that year.

　　In the summer of 2006, a high temperature heat wave occurred in Sichuan and Chongqing.

According to the China Youth Daily, more than 6,000 people in Chongqing suffered heatstroke on a single day on August 14.

The next day, the number of people suffering from heat stroke rose to more than 14,000.

　　In 2013, the southern part of my country suffered a rare high temperature heat wave, resulting in death cases of heat stroke in Shanghai, Hubei, Jiangsu, Jiangxi, Zhejiang, Hunan and other places, and the number of respiratory diseases and cardiovascular and cerebrovascular diseases soared.

According to data from the Shanghai Center for Disease Control and Prevention, as of July 30 of that year, there were more than 10 non-occupational heatstroke deaths in Shanghai.

5. Why are extreme high temperatures increasing?

　　In fact, not only in my country, but since June in many countries in the northern hemisphere, high temperature and heat waves have occurred frequently.

According to monitoring by the National Climate Center, in June this year, the global average temperature was about 0.4°C higher than normal, the highest since 1979.

The daily maximum temperature in Spain, France and Italy exceeded 40°C, and many cities in France, Spain, the United States and Japan set new high temperature records.

The temperature in Tokyo, Japan exceeded 35°C for five consecutive days; the high temperature warning in the central and eastern United States affected about 125 million people, more than one-third of the US population; the extreme heat in the German state of Brandenburg caused forest fires due to extreme high temperature exacerbating drought...

　　The sixth assessment report of the United Nations Intergovernmental Panel on Climate Change (IPCC) pointed out that global warming in the past 50 years is occurring at an unprecedented rate since the past 2000 years, and the instability of the climate system is increasing.

Global warming is the fundamental reason for the frequent occurrence of high temperature and heat waves in the northern hemisphere.

　　The dog days have not yet arrived, and the high temperature and heat waves are already raging.

High temperature has a certain impact on people's daily life and health as well as all walks of life. We must not relax our vigilance.

China Weather Network reminds you that in hot weather, you should pay attention to adequate rest, replenish water in time, reduce going out in the afternoon, scientifically prevent heatstroke and cool down, and spend the summer safely.

(Planning: Feng Wei Data Support: Wang Weiyue)