Rainstorm warning in Zhengzhou immigrant area, Henan Province

Heavy rainfall caused floods in six southern provinces, with seven people dead and seven missing.

20 1 1-6- 15 14: 16

BEIJING, June 15 (Xinhua) According to the website of the Ministry of Civil Affairs, heavy rainfall triggered floods in the middle and lower reaches of the Yangtze River and parts of Sichuan and Guizhou, causing 7 deaths and 7 missing in 6 provinces of Zhejiang, Jiangxi, Hubei, Hunan, Sichuan and Guizhou.

On June 13, the third heavy rainfall occurred in the middle and lower reaches of the Yangtze River since June this year, which led to floods in the middle and lower reaches of the Yangtze River and parts of Sichuan and Guizhou. According to the statistics of the Office of the National Disaster Reduction Committee, as of June 1 1 day and June 13, the process of rainstorm and flood disaster caused 7 deaths, 7 missing and 88,000 emergency relocation in 6 provinces of Zhejiang, Jiangxi, Hubei, Hunan, Sichuan and Guizhou.

Among them, more than 3,000 people were resettled in Zhejiang Province; Jiangxi province died of disaster 1 person, and 22,000 people were urgently transferred and resettled. In Hubei Province, there were 6 deaths 1 person, 6 people were missing and 42,000 people were resettled. Death in Hunan province 1 person, emergency transfer and resettlement 1 person. Three people died in Guizhou province due to the disaster, and more than 3,000 people were relocated. Sichuan 1 dead, 1 missing.

Experts say that the change of atmospheric circulation is the main reason for the sharp turn of drought and flood.

2011June 15 03:50 People's Daily-People's Daily

Our reporter Liu Yi.

Core tips

On June 5438+04, the middle and lower reaches of the Yangtze River ushered in the third round of heavy rainfall peak this month. 14, 18, the Central Meteorological Observatory continued to issue a yellow rainstorm warning, which is expected to last until 16.

From March to the end of May in spring, the precipitation in the middle and lower reaches of the Yangtze River is unusually low and the drought is serious. However, in June, heavy precipitation continued, and some areas suffered severe floods.

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20 1 1-6- 15 14: 16

The rainstorm warning continues.

Guizhou early warning, Hunan early warning, Jiangxi early warning, Anhui early warning, Jiangsu early warning, Zhejiang early warning ... 14, the latest rainstorm early warning signals from all over the country are displayed on the big screen of the Central Meteorological Observatory. In front of a computer, dozens of forecasters are nervously analyzing various meteorological data to judge the weather change trend.

At present, the middle and lower reaches of the Yangtze River are experiencing the third round of heavy rainfall since June.

From March to May this year, the five provinces of Hubei, Hunan, Jiangxi, Anhui and Jiangsu in the middle and lower reaches of the Yangtze River continued to have little rain, and severe drought occurred in some areas. Since the evening of June 3, the middle and lower reaches of the Yangtze River have been flooded with manna. Since then, three rounds of heavy rainfall have followed.

Sun Jun, chief forecaster of the Central Meteorological Observatory, said that from 3 rd to 7 th, the first round of rainfall occurred in the middle and lower reaches of the Yangtze River, and the drought was obviously alleviated; 9- 1 1, the second round of heavy rainfall caused serious floods in Xianning, Hubei; 12 ~ 13, the rainfall weakened and the distribution of heavy rainfall was scattered. The third round of heavy rainfall began on the night of 13, and 14 was the strongest day of this round of rainfall.

Sun Jun said that many of the three rounds of heavy rainfall in the middle and lower reaches of the Yangtze River were repeated. The first two rounds of rainfall saturated soil moisture, and the water levels of small and medium-sized rivers, reservoirs and lakes were high, and some of them approached or exceeded the warning water level. In the third round of rainfall, some small and medium-sized rivers and reservoirs are in great danger of overflow and dam collapse, which is prone to geological disasters and urban waterlogging.

As the first rainstorm warning this year was issued on 3rd18th, the Central Meteorological Observatory upgraded the blue rainstorm warning to yellow on 3rd18th, and continued to issue the yellow rainstorm warning on 4th/kloc-0. 12, China Meteorological Bureau started the Class III emergency response of major meteorological disasters.

In the first ten days of June, the precipitation in the five provinces was 30% to 50% higher than that in the same period of history.

Zhang Peiqun, deputy chief engineer of the National Climate Center, said that the obvious feature of precipitation in the middle and lower reaches of the Yangtze River this year was the severe drought before the end of May, and the precipitation increased significantly after June, with three rainfall processes concentrated. From June 1 day to June 13, the average precipitation in the Yangtze River basin was slightly higher than that in the same period in history, and the precipitation in the five provinces in the middle and lower reaches of the Yangtze River was 30% to 50% higher than that in the same period in history.

Zhang Peiqun said that according to years of statistics, the middle and lower reaches of the Yangtze River generally enter the rainy season with concentrated precipitation from June 16 to June 19; Since there were meteorological records in 1950s, the earliest time for the middle and lower reaches of the Yangtze River to enter Mei was June 2nd, which appeared in 199 1 and 1996. This year, the time of concentrated precipitation in the middle and lower reaches of the Yangtze River is slightly earlier than normal, but it will take some time to confirm whether it will enter Mei or not.

Will there be a flood like 1998 in the Yangtze River Basin? Zhang Peiqun replied that no signal of this abnormal climate has been seen yet. Since 2000, the middle and lower reaches of the Yangtze River have entered a period of less precipitation in summer. However, there will also be heavy precipitation in stages. For example, since May last year, there have been 14 rounds of precipitation in the middle and lower reaches of the Yangtze River.

According to meteorological experts such as Zhang Peiqun, up to now, although the rainfall in some areas of the middle and lower reaches of the Yangtze River has been very strong since June, there is not much abnormality in general; The severe drought in the middle and lower reaches of the Yangtze River before June and the recent sharp turn of drought and flood are really rare.

The change of atmospheric circulation is the main reason for the sharp turn of drought and flood.

According to statistics, from March/KLOC-0 to May 30 this year, the precipitation in the middle and lower reaches of the Yangtze River was unusually low, and the average precipitation was 52.8% less than that in the same period of normal years. Meteorological droughts in Hubei, Hunan, Jiangxi, Jiangsu, Anhui, Zhejiang and Shanghai continue. On May 27th, the meteorological drought in the middle and lower reaches of the Yangtze River reached the yellow warning level.

Sun Jun said that the sudden change of drought and flood since June is mainly due to the change of atmospheric circulation. With the onset of monsoon in June, the southwest warm and humid airflow from the Bay of Bengal strengthened and the water vapor conditions improved. At the same time, there are often weak cold air moving eastward from the Qinghai-Tibet Plateau. Abundant warm and humid air and cold air meet in the middle and lower reaches of the Yangtze River, bringing rainfall.

What is the root cause of the recent changes in atmospheric circulation?

Experts from the National Climate Center said that the factors leading to changes in atmospheric circulation and heavy rains in the middle and lower reaches of the Yangtze River are more complicated. Climate experts are making a comprehensive analysis and judgment, and there is no formal conclusion yet.

Meteorologists pointed out that the middle and lower reaches of the Yangtze River, where heavy rainfall occurred, experienced a "sharp turn of drought and flood", but the precipitation in central and northern Anhui, central and northern Jiangsu, northern Hubei and other places was less, and they were still in a meteorological drought state. Therefore, on the whole, drought and flood coexisted.