Brief introduction of extreme weather events

If the heavy rainfall or disastrous climate events on a certain day have a great impact on human beings and society, they can be called high-impact weather and climate events or extreme weather and climate events. Extreme weather and climate events must be compared with similar events in history. The so-called extreme is that the probability of occurrence is small.

On May 2, 2008 14: 27: 59.5, an earthquake measuring 8.0 on the Richter scale occurred in Wenchuan County, Aba Tibetan and Qiang Autonomous Prefecture, Sichuan Province, killing 69,227 people, injuring 374,643 people and missing 17923 people.

The snowstorm in China in 2008 (the snowstorm in southern China in 2008) refers to the natural disasters such as freezing rain and snow in China since June 5438+1October 10 in 2008. Shanghai, Zhejiang, Jiangsu, Anhui, Jiangxi, Henan, Hubei, Hunan, Guangdong, Guangxi, Chongqing, Sichuan, Guizhou, Yunnan, Shaanxi, Gansu, Qinghai, Ningxia, Xinjiang, Xinjiang Production and Construction Corps and other 20 provinces (autonomous regions and municipalities) are all affected by low temperature, rain, snow and freezing disasters to varying degrees. As of February 24th, there were 1.29 people dead, 4 people missing and 1.66 million people resettled urgently. The affected area of crops was 65.438+0.78 billion mu, resulting in 87.64 million mu of disasters, with no harvest of 25.36 million mu; 485,000 houses collapsed and 6,543,800 houses were damaged; The direct economic loss due to the disaster is 1.5 1.65 billion yuan. The damaged forest covers an area of nearly 279 million mu, and 30,000 national key protected wild animals were frozen to death or frostbite in the snowstorm. The affected population has exceeded 1 100 million. Seven provinces, including Hunan, Hubei, Guizhou, Guangxi, Jiangxi, Anhui and Sichuan, suffered the most.

1-On August 2, 2009, there were 355 weather stations in China that met the standard of extreme high temperature events, and the daily precipitation of 67 stations met the standard of extreme heavy precipitation events. The "Extreme Weather and Climate Event Monitoring Express" issued by the National Climate Center in real time is also constantly reminding people to take precautions against extreme weather and climate events.

Due to the concern for Chinese rivers, it is found that the causes of extreme weather and climate in 2009 have certain regularity.