Record breaking duration and intensity of multiple high temperatures may be hotter in some areas in August

Since July (July 1-29), there has been a large range of high temperature weather in Jiangnan, Jianghuai, Jianghan and Chongqing, with long duration, wide coverage, great intensity and heavy impact The duration and intensity of high temperature in some areas have broken the historical records On July 30, China Meteorological Administration announced the launch of level II emergency response to major meteorological disasters (high temperature) This is the first time that the meteorological department has started the high-temperature emergency response since the establishment of the meteorological disaster emergency plan Level II is the highest level of the high-temperature emergency response High temperature weather may continue to develop On July 30, Zheng Guoguang, director of China Meteorological Administration, issued an order to start the level II emergency response for major meteorological disasters (high temperature) This is the first time that the meteorological department has started the high temperature emergency response since the formulation of the emergency plan for meteorological disasters Level II is the highest level of high temperature emergency response In the coming July, the high temperature in Jianghuai, Jiangnan, Chongqing and other places will last for a long time According to the forecast of the central meteorological station, the high temperature weather in the South lasting for nearly a month may continue to develop in the future From the first ten days of August to the early middle ten days of August, the high temperature weather in Southeast Henan, Hubei, Anhui, Southern Jiangsu, Shanghai, Zhejiang, Jiangxi, Hunan, Chongqing, eastern Guizhou, North Central Fujian and other places will continue, and the high temperature intensity in some areas will probably exceed that in the early days At 18:00 on the 30th, the Central Meteorological Station issued the highest level of high temperature orange warning for the fifth day in a row According to the meteorological disaster emergency plan of China Meteorological Administration, when the Central Meteorological Station issued the high temperature orange warning for two consecutive days, and it is expected that most areas in the warning area will continue to meet the high temperature yellow warning standards in the next three days, the level II emergency response can be started According to the requirements of level II emergency response for major meteorological disasters (high temperature), all departments of China Meteorological Administration enter into level II emergency response state, and relevant provincial (municipal) meteorological bureaus enter into corresponding emergency response level according to actual research and judgment All units will, in strict accordance with their responsibilities, timely release the high temperature facts, accurately issue the high temperature warning and remind the public to take precautions In many places, 25 meteorological stations have extreme high temperature events, with the highest temperature breaking the historical extreme The high temperature weather covers 19 provinces (regions and cities) in Jiangnan, Jianghuai, Jianghan and Chongqing, among which the area with high temperature days lasting more than 20 days has reached 189000 square kilometers According to the statistics of the National Climate Center, since July, the number of high temperature days in Jiangnan and Chongqing has been 17.9 days, which is the second most since 1951 (18 days in 2003, 17.9 days in 1971), 7.8 days more than the same period throughout the year Among them, the number of high temperature days in Hunan and Shanghai is 18.9 and 18.5 days respectively, the most in the same period since 1951; the number of high temperature days in Zhejiang is 19.1 days, the most in the same period since 1951 (the most in 2003, 20.2 days) Since July, the longest continuous high temperature days in Jiangnan and Chongqing have generally reached 5-10 days, among which the longest continuous high temperature days in central Zhejiang and Hunan have reached 10-15 days, the longest continuous high temperature days in central Hunan have exceeded 15 days, and the longest continuous high temperature days in Changsha, Hengshan and Anren have reached 29 days That is to say, these places have been in hot weather since July 70 stations in 8 provinces (cities) including Hunan, Zhejiang, Shanghai and Jiangsu experienced extreme continuous high temperature days The number of consecutive high temperature days in 19 cities or counties has exceeded the historical extreme According to the monitoring data of the National Climate Center, from July 1 to 29, 67 meteorological observation stations in 14 provinces (cities and districts) including Jiangsu price, Shanghai, Zhejiang, Chongqing and Xinjiang have experienced extreme high temperature events, among which 25 cities or counties in 6 provinces (cities and districts) including Jiangsu price, Shanghai, Zhejiang, Chongqing, Guizhou and Xinjiang have exceeded the historical maximum temperature (as shown in the figure) As of July 29, the daily maximum temperature of 43 counties and cities in the South exceeded 40 ℃ Continuous high temperature has a certain impact on human health, power supply, water resources, agricultural production, etc Satellite remote sensing monitoring shows that in July this year, the water area of Poyang Lake and Dongting Lake decreased by 25% and 29% compared with the same period last year On July 29, the national meteorological drought monitoring showed that there was moderate to severe meteorological drought in most of Guizhou, central and Western Hunan, southern Chongqing and other places This year's high temperature situation is similar to that in 2003 Recently, some foreign countries have also suffered from high temperature attacks Experts from the Central Meteorological Observatory said that this year's high temperature situation is similar to that in 2003 In the summer of 2003, the South also experienced a rare high temperature process The high temperature period lasted for 43 days from June 30 to August 11 The temperature in many places refreshed the historical extreme value in the same period The highest temperature in Changsha, Fuzhou and Nanchang reached 41 ℃, and that in central and southern Zhejiang, Northern Fujian and central Jiangxi reached 40-43 ℃ Experts from the National Climate Center said that in recent years, some places abroad have also suffered from high temperature From July 6 to 14, Britain suffered the longest heat wave attack since 2006 The temperature in the daytime continued to exceed 30 ℃, and on July 17, the highest temperature in the southwest was 32.2 ℃, which killed people On July 27, the highest temperature in Germany reached 39 ℃, and hundreds of people were hospitalized for heatstroke On the same day, the temperature in Italy also approached 40 ℃, and 14 cities issued high temperature orange alarm France, Poland and other countries have also experienced hot summer temperatures In some areas, the temperature has exceeded 35 ℃, and the average temperature is significantly higher than the same period of previous years In addition, from July 7 to 14, Japan was hit by a high temperature heat wave, with the highest temperature exceeding 39 ℃, resulting in 41 deaths From July 16 to 17, the northeast and Midwest of the United States were hit by high temperature waves, with the highest temperature reaching 37.8 ℃, killing at least six people It is difficult for experts to judge when the high temperature will end Since July, there have been a large range of high temperature weather in Jiangnan, Jianghuai, Jianghan and Chongqing What are the reasons for the high fever in these areas? Reporter interviewed he Lifu, chief forecaster of the central meteorological station Reporter: what is the cause of this large-scale persistent high temperature? He Lifu: the reasons can be summarized into three points: first, the Meiyu period in the middle and lower reaches of the Yangtze River is shorter than that in previous years, and the Meiyu period is earlier The subtropical high has been controlling the middle and lower reaches of the Yangtze River since the early July Affected by the downdraft, the weather is clear and cloudless, the solar radiation is strong, and the atmospheric humidity is large, so the weather is humid and sultry Secondly, the intensity of subtropical high is much stronger than that of the same period in history In the past, the middle and lower reaches of the Yangtze River were still in the Meiyu season in the first half of July This year, due to the early occurrence of Meiyu, the number of high temperature days was obviously too many, and the subtropical high was relatively strong, which led to the continuous rise of temperature Another reason is the abnormal atmospheric circulation Up to now, there are few typhoons in the north and deep into the inland In previous years, due to the landing of typhoon, the subtropical high will retreat and break under the influence of typhoon, presenting intermittent high temperature However, this year's typhoon mainly affects the south in the Taiwan Strait and the South China Sea, causing the subtropical high to control the inland for a long time, so it is reasonable that the high temperature in the middle and lower reaches of the Yangtze River for a long time will be high Reporter: when will the high temperature weather in the south end? He Lifu: it is predicted that in the next 10 days, the high temperature weather in Jiangnan, Jianghuai, Chongqing and other places will continue and strengthen, and the number of high temperature days in some areas can reach 5-8 days; among them, from August 1 to 5, there will be a large range of high temperature weather with the highest daily temperature over 39 ℃ in the eastern part of Jiangnan However, the high temperature in North China is not significant, and there may be more rainfall in North China As for the end of large-scale high temperature weather in the south, we need to determine it according to the weather situation in the middle of August and provide tracking and forecasting services.