Reporter Li Hongmei
On July 12, the temperature in Hangzhou, Zhejiang exceeded 40 degrees Celsius.
On the same day, the highest temperature of 31 national weather stations across the country refreshed the historical extreme value for the same period since 1961...
Recently, the Central Meteorological Observatory issued a high temperature warning for more than 10 consecutive days, and the highest temperature in Sichuan, Shanghai, Zhejiang, Jiangsu, Henan, Hebei and other places exceeded 40 degrees Celsius.
According to the forecast of the Central Meteorological Observatory, from the night of July 18 to 20, there will be a significant rainfall process from west to east in the Sichuan Basin, Yunnan, Guizhou, Huanghuai, and Jianghuai.
Affected by the rainfall, the high temperature range in the southern region will be significantly reduced and the intensity will weaken; but it is expected that during the day on July 18, there will still be 35-37 degrees Celsius high temperature weather in parts of Xinjiang along the Tianshan Mountains and the Southern Xinjiang Basin, southeastern Shaanxi, and southern Beijing. , after July 20, the high temperature in the southern region will develop and expand again.
Since June, the high temperature event has lasted for more than 30 days.
A total of 238 national meteorological stations in Hebei, Henan, Tianjin, Yunnan, Sichuan, Zhejiang and other places have a total of 238 national meteorological stations whose daily maximum temperature exceeded the monthly extreme value, and 71 national meteorological station's daily maximum temperature broke through the historical extreme value.
Among them, Hebei Lingshou (44.2 degrees Celsius), Gaocheng (44.1 degrees Celsius), Zhengding (44.0 degrees Celsius) and Yunnan Yanjin (44.0 degrees Celsius) had the highest daily temperature of over 44 degrees Celsius.
According to the monitoring data of the National Climate Center, since June this year (before it entered the apocalypse), the average number of high temperature days in my country was 5.3 days, the most in the same period in history since 1961, and the comprehensive intensity was the sixth strongest since 1961.
Why is it so hot this summer?
According to the monitoring of the National Climate Center, in June this year, the global average temperature was about 0.4 degrees Celsius higher than normal, the highest since 1979.
The National Climate Center pointed out that global warming is the climate background for the frequent occurrence of high temperature and heat waves in the northern hemisphere, and the abnormal atmospheric circulation is the direct cause of the frequent occurrence of high temperature and heat waves in many places around the world since June.
Yuan Yuan, the chief on duty during the flood season of the National Climate Center, said that since June this year, a large-scale global warm high pressure belt has formed over the subtropical region of the northern hemisphere.
Under the control of the warm high-pressure zone, the prevailing downdraft is conducive to the warming of the ground. In addition, under the action of the large-scale high-pressure zone, the air is relatively dry, and it is not easy to form clouds, which also makes it easier for solar radiation to reach the ground, resulting in frequent high temperature occurrences , and the intensity is strong, resulting in sustained high temperature and heat wave events in many parts of the northern hemisphere.
Specifically for my country, 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.
In addition, due to the water vapor carried by the subtropical high pressure, the humidity in the central and eastern parts of my country is relatively high, and the body temperature will also be higher.