Experts analyze the four major focus of the recent high temperature weather

Xinhua News Agency, Beijing, August 13th: Experts analyze the four major focus of the recent high temperature weather

Xinhua News Agency reporter Huang Yan

Since the summer of this year, my country has a large number of high -temperature days, wide coverage, and the highest temperature of the highest temperature in many places. The Central Meteorological Observatory continued to issue high -temperature red warnings on the 13th. The China Meteorological Administration launched a three -level emergency response to high temperatures that day. What is the extreme extreme of high temperature weather? What are the reasons and impacts? Will it become the norm?

Focus 1: What is the recent high temperature weather?

Chen Tao, chief forecast at the Central Meteorological Observatory, introduced that since late July, high temperature weather with large scope and strong intensity in the middle and lower reaches of the Yangtze River. On August 12, the Central Meteorological Observatory issued the first high -temperature red warning this year; as of the 13th, the Central Meteorological Observatory had issued high -temperature warning for 24 consecutive days.

Data show that since July, the average number of high temperatures above 35 ° C in Zhejiang province has an average of 31 days, and an average of 16 days above 38 ° C, which is the largest period of history. ; Shanghai has a total of 40 days above 35 ° C this year, and the number of high temperatures above 40 ° C is 6 days.

Chen Lijuan, chief forecast at the National Climate Center, said that the current regional high temperature process has not exceeded 2013, but the high temperature weather in the southern southern in the next two weeks will continue. According to predictions, the duration of the regional high temperature process will exceed 62 days in 2013, becoming the longest high temperature process since 1961. This year's high -temperature weather intensity may be the strongest since 1961.

Focus 2: How long is it expected to last?

According to Chen Tao, the standard for the Central Meteorological Observatory issued a high -temperature red warning is: in the past 48 hours, the maximum temperatures in parts of 4 and above provinces will continue to reach 40 ° C or more, and it is expected that the above areas will continue in the future.

"From the process of forecasting on the 12th, first of all, according to monitoring, Sichuan, Chongqing, Zhejiang, Jiangsu, and Hubei have already appeared in high temperature weather above 40 ° C. At the same time, through the analysis of atmospheric circulation, it is expected that the future is expected to be in the future. The Sichuan Basin to the middle and lower reaches of the Yangtze River will still have high -temperature weather with a large range and strong intensity. "Chen Tao said that preliminary expected that high temperature weather in the next 4 to 5 days will still meet the release standards of red warning, and the Central Meteorological Observatory will continue Traveling the situation of the weather and the development of forecasting, and timely rolling update forecast early warning.

Focus 3: What are the causes of high temperature weather? Will it be the norm?

Chen Lijuan said that the high -temperature heat wave incident in summer is normal from the perspective of climate. However, the time, strength, and influence of the high -temperature heat wave event this summer have reached a very strong level. According to the monitoring and later predictions of the National Climate Center, the rare high temperature weather in my country since June this year may reach the strongest high temperature incident since 1961.

Chen Lijuan analyzed that from the factors that affect the most intuitive temperature -the characteristics of the atmospheric circulation, this year, the Western Pacific subtropical high -pressure high pressure is abnormally strong and extended west. "This year's high temperature and hot heat may appear frequently in the future." Chen Lijuan said that in the context of climate change, the high temperature heat wave event will become a normal state. In addition, this year's high temperature weather starts early, late, and long duration, this characteristic may become more and more significant in the future.

Not only is the high temperature frequent in my country. Since the summer, there have been high -temperature heat waves in the northern hemisphere in many places. France, Spain, the United Kingdom, the United States, Japan and other cities have set a high temperature record. The sixth evaluation report of the Special Committee for Climate Change of the United Nations (IPCC) pointed out that global warming in the past 50 years has occurred at unprecedented speeds in the past 2000, and the unstable climate system has intensified. Since the 21st century, the summer high temperature heat wave event in the northern hemisphere has become more frequent.

Focus 4: How is the drought affected by high temperature?

Affected by the continuous high temperature and rainy weather, the drought in some areas of the Yangtze River Basin developed rapidly. The Ministry of Water Conservancy issued a drought report on the 11th stating that Anhui, Jiangxi, Hubei, Hunan, Chongqing, Chongqing, Sichuan, and Sichuan's cultivated land was under the area of ​​9.67 million mu, and 830,000 people were affected by drought supply. The Ministry of Water Resources in 6 provinces and cities in Anhui, Jiangxi, Hubei, Hunan, Chongqing, and Sichuan launched a drought defense level IV emergency response.

The Ministry of Water Conservancy issued a notice to the water conservancy departments of relevant provinces and cities, requiring to take drought resistance early to reduce the impact and loss of drought. At the same time, the organization of the Yangtze River Basin emergency water volume dispatch schedule is organized, and dispatching measures are proposed for key dry areas, and 51 major reservoirs such as the Three Gorges and Danjiangkou are planned in advance to reserve water sources for drought resistance.

Chen Lijuan said that the possibility of less precipitation in the Yangtze River Basin in the fall of the Yangtze River is still greater, especially in the middle and lower reaches of summer and autumn. The meteorological department will continue to strengthen monitoring predictions and roll up positive predictions in a timely manner.

In addition to drought, there are varying degrees of flood conditions in some areas. Recently, the Northeast China is in a critical period of flood prevention, and some rivers in the Songliao Basin continue to surpass the police. Affected by rainfall and high temperature melting, the Tarim River dry flow and its tributary Yeerqian River, including the flood above the over -the -alarm traffic ...

At present, the critical period of flood prevention is still worth "seven or eight", and all localities should do a good job in the response of floods and droughts in advance.

[Editor in charge: Zhao Wenhan]

- END -