What is the reason for the strange snow disaster in 08 and the 2008 snow disaster

The first reason,La Niña.

That is, the sea surface temperature in the eastern equatorial Pacific Ocean is lower than normal and below the negative degree, and this phenomenon has a very obvious impact on China's climate, under the influence of La Niña, it is very conducive to the southward movement of cold air from the north of China, so it makes us have a cold winter.

The second reason,Snow or rain must meet two conditions:

1. From the tropics.

Warm and humid airflow. 2. Cold air from alpine regions. Since 2008, the Asian high pressure has been very active, and the cold air mass has been formed to affect our country in the south, but because the warm air mass in the south is also active this year, the cold and warm are just combined.

So especially in the Yangtze River basin.

There is a lot of rain and snow, and the weather is low for a long time.

If there is only a strong cold air mass, and there is no large amount of water vapor provided by the warm and humid air mass, there will only be strong winds and cooling weather in the south; If there is only a large amount of water vapor provided by the warm and humid air mass, and no cold air mass is present, there is no catastrophic weather at all. And when both are in place, disaster strikes.

Meteorological experts say that South China.

Persistent low temperatures, La Niña and anomalous atmospheric circulation.

There is a close relationship. Experts point out that in the middle and high latitudes of Eurasia, there is a blocking high pressure at high altitude and continues for a long time, and the polar vortex is in Siberia.

Staying still, the cold air from the north has continuously invaded China.

At the same time as the cold air hits, it comes from the Indian Ocean.

The warm and humid air from the western Pacific Ocean is continuously transported to South China, and the cold and warm airflow is in the southwest and Jianghan.

South China, Jiangnan, Jianghuai.

The convergence of the area resulted in a rare prolonged and widespread range of low temperatures, rain, snow and freezing weather. However, experts stressed that China's rare ice and snow disaster weather is caused by a variety of factors, and La Niña is not the only cause.

In 08, the Wenchuan Da** happened. 2008 is the year of the Wuzi of the lunar calendar, and the zodiac is the rat. At 14:28 on May 12, 2008, Beijing time, a Richter class occurred in Wenchuan County, Sichuan Province.

In order to express the deep condolences of the people of all ethnic groups across the country for the compatriots who died in Wenchuan, Sichuan, it was decided that May 19-21, 2008 would be the National Day of Mourning.

Other major events in China in 2008: China's successful hosting of the Olympic Games and the successful launch of the Shenzhou-7 manned spacecraft.

1. The 29th Summer Olympic Games, also known as Wang Kuan's 2008 Beijing Olympic Games, was held in Beijing, the capital of China, from August 8 to 24, 2008. This Olympic Games is the first time that China has hosted the Summer Olympic Xiangling Fugong Games, and it topped the gold medal table with 51 gold medals, making it the first Asian country in Olympic history to top the gold medal list. The 13th Paralympic Games in Beijing were held on September 6 and 17, 2008.

Except for the equestrian competition held in Hong Kong and the sailing competition held in Qingdao, the rest of the events were held in Beijing.

2. The Shenzhou-7 manned spacecraft is one of China's Shenzhou series of spacecraft, which was launched by a Long March-2F rocket at the Jiuquan Satellite Launch Center at 21:10:04 on September 25, 2008. The spacecraft carried three astronauts, Zhai Zhigang, Liu Boming and Jing Haipeng. After a total of 2 days, 20 hours and 27 minutes, the spacecraft successfully landed at 17:37 on September 28, 2008 at the main landing site of Siziwangqi in Inner Mongolia, China.