China's high temperature is about to break the record. Will the "cool summer" become the norm in the future?

This year, my country has experienced extreme high -temperature heat waves. With the advent of "Sanfu Sky", "sauna" and "barbecue sky" have been further upgraded. On the 12th, the China Meteorological Administration issued the first high -temperature red warning this year. The high temperature in the middle and lower reaches of the Yangtze River and the southwestern region continued to develop, and the drought of meteorology increased. Why is this high temperature so extreme this year?

Extreme "cool summer"

From late July to the present, the middle and lower reaches of the Yangtze River in China have gone through high -temperature weather with large range and strong intensity.

According to statistics, as of the 13th, Shanghai has appeared more than 35 degrees high temperatures for 40 days this year, and the extreme maximum temperature is 40.9 degrees.

Since July this year, the province has an average of 31 days above the high temperature of 35 ° C in Zhejiang, and an average of 16 days above the province above 38 ° C, all of which are the largest period of history. Among them, the three doors reached 43.1 ° C and Yongjia reached 42.9 ° C.

Chongqing has experienced two rounds of high temperature weather. The average high temperature of the city has reached 29.3 days. It is more than 29.3 days since 1951. It is expected that the large-scale high-intensity and high temperature weather will continue in the future. It can reach 43-44 ° C, and the highest temperature in some districts and counties will approach or exceed historical poles.

On the 12th, the China Meteorological Administration issued the first high -temperature red warning this year (high -temperature red warning standard: in the past 48 hours of 4 and above provinces and regions, the maximum temperature will appear by 40 ° C or above. High -temperature red warning). On the 13th, the high -temperature red warning continued. It is expected that some areas in 10 provinces and cities in Jiangsu, Zhejiang and Shanghai can reach 40 to 42 ° C, and the local area exceeds 42 ° C.

How long will the high temperature last?

谈及本轮高温天气的原因，中央气象台首席预报员陈涛表示，与大气环流的异常状况有一定关系，从监测上看，西太平洋副热带高压范围偏大、强度偏强，在其控制之下， The southern region is controlled by the sinking air flow. The sky is clear and cloudy. Under the influence of the radiation of sunshine during the day, the heating near the ground is relatively strong, so there is a relatively large -scale high -temperature weather.

Chen Tao predicts that in the future, the subtropical high pressure will still control the middle and lower reaches of the Yangtze River, and the high temperature weather from the Sichuan Basin to the middle and lower reaches of the Yangtze River will continue to develop or maintain the current state. It is expected that high -temperature red warning will last at least 4 to 5 days.

Chen Lijuan, chief forecaster of the National Climate Center, said that according to the forecast, the duration of the high temperature process of the regional area will exceed 62 days in 2013, becoming the longest high temperature process since 1961.

Affected by high temperature weather, relatively heavy droughts in the Sichuan Basin to the middle and lower reaches of the Yangtze River, and Jiangsu, Zhejiang and Shanghai have become "workers".

Since July, the rainfall of the Yangtze River Basin has been 40 % less than the same period of the same year. The high temperature days in the middle and lower reaches of the area have exceeded 25 days, and there are no effective rainfall days in some areas. The lowest time has been recorded in the same period. According to the data of the Ministry of Water Resources on the 11th, the drought in the Yangtze River Basin has caused 9.67 million mu of cultivated land in Anhui, Jiangxi, Hubei, Hunan, Chongqing, and Sichuan, and 830,000 people were affected by drought water supply.

According to predictions, the possibility of less precipitation in the Yangtze River Basin in the later autumn is still greater, especially in the middle and lower reaches of the lower reaches of summer and autumn.

Chen Tao said that it is expected to continue or worsen in the future. The continuous high temperature has a greater impact on economic crops such as southern tea and fruits. High temperature has also increased the demand for power and energy. Residents' demand for electricity increases, increasing the pressure on power energy protection work.

High -temperature heat waves may become new normal

"According to the monitoring of the National Climate Center, the rare high temperature weather that appeared in China since June this year is actually the strongest incident since 1961." Chen Lijuan said that in fact, the high -temperature heat wave incident occurred from the perspective of the climate in summer. It is normal, but the duration, strength, and influence of the high -temperature heat wave event this summer has indeed reached a very strong level. This is far from the weather scale, and there must be a deep climate reason behind it.

She said that the sixth evaluation report of IPCC (Special Committee for Climate Change of the United Nations) pointed out that in the context of global warming, many changes in extreme weather and climate events have been observed since the background of global climate warming. Extinction is a very significant feature. Therefore, the high -temperature heat wave incident in the context of climate change will become a new normal. It is expected that the frequency of high temperature in high temperature in the summer will be more frequently in the future, and the characteristics of high temperature duration for a long time may become more and more obvious.

Experts suggest that for continuous high temperature weather, the southern region should conduct some water replenishment operations such as spray irrigation and cooling in time for crops to reduce the adverse effects of high temperature and drought on agriculture; do a good job in the protection of electricity and energy supply to meet the demand for people's electricity. For the public, it is necessary to minimize outdoor activities in high temperature weather, replenish water in time, and try to avoid potential disease risks related to high -temperature weather such as heat irritation.

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