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"What is the reason why this round of floods in South China has repeatedly' broken through historical extremes'?"
Because although there are warm SST anomalies in the Indian Ocean and the western Pacific this year, it is conducive to the enhancement of the subtropical high in the western Pacific, and the general increase of SST is conducive to the transport of more water vapor from the ocean to the land. As long as the subtropical high in the western Pacific is strong enough and the Yangtze River basin is in a low pressure area, the middle and lower reaches of the Yangtze River are prone to heavy precipitation.

According to Luo Jingjia, an internationally renowned climatologist and national distinguished professor of Nanjing University of Information Science & Technology Institute of Atmospheric Sciences, if the dynamic model is used, the precipitation in July will be slightly higher than in previous years. If the current situation continues, the situation will be even more severe. It may improve in August, but there is still more precipitation in Central China. Of course, this is only a prediction, and the result is uncertain.

Extended data

Rainstorm inversion and flood increase in South China

The heavy rainfall since June this year has caused floods in many southern provinces. The Central Meteorological Observatory reported on July 7th that during the period from June/kloc-0 to July 6th this year, the accumulated rainfall in the Yangtze River Basin was the second highest in nearly 60 years, exceeding the rainfall of 1 998. On July 0 1 10, Jiangxi Province upgraded the emergency response of flood control level II to level I, and the water level of Poyang Lake exceeded the historical extreme value of 1998, so the flood control situation was extremely severe. At present, the flood control work in Jiangxi Province has entered a wartime state.

As of July 12, this year's floods have affected 37.89 million people in 27 provinces (autonomous regions and municipalities) such as Jiangxi, Anhui, Hubei and Hunan. 14 1 one person died and disappeared, and 2.246 million people were resettled urgently. 125. 28,000 houses collapsed; The affected area of crops is 3532 thousand hectares; The direct economic loss was 82.23 billion yuan.

CCTV News-What is the reason why this round of floods in South China has repeatedly "broken through historical extremes"?