China has encountered sandstorm again except in most regions.The minimum visibility is 1 to 4 kilometers, and the air quality has reached serious pollution standards.
CCTV reported on Tuesday (April 11) in the morning that under the warning of the windy yellow and sandstorms, the minimum visibility of most of Beijing was 1 to 4 kilometers.In addition, Beijing has strong winds during the day, and gusts can reach 8 to 9.
Public information shows that the level of the China sandstorm warning signal level is divided into three levels from weak to strong, in turn, yellow, orange, and red;1000 meters, or the dust storms have appeared and may continue.
According to the surging news Monday (April 10), it was reported late at night, data from the official website of the Beijing Ecological Environment Monitoring Center showed that as of 9 pm on Monday, the air quality index of BeijingFor the sixth level, it has reached serious pollution standards.
That night, the topic of "Beijing Dust Storm" also appeared on the Weibo hot search list. Netizens have published pictures and texts to share their experience of experienced sandstorms: "One breath and one suction is the taste of the Sahara desert.The big sand stunned me "" After opening the window for a while, PM2.5 can be said to be soaring to more than 100 in an instant.In the southern Mongolia, the overall strength and scope of the overall strength and scope were weakened than the strong sandstorms from March 19th to 24th, and the sandstorms are expected to end on Tuesday evening.
According to data statistics, more than 70 % of sand and dust in China appear in spring, the most frequent month of which is April, followed by March and May.
Wu Bo, director of the Institute of Desertification of the Chinese Academy of Forestry Sciences, analyzed to the People's Daily that the main domestic source of China's sandstorms is concentrated in desert areas such as southern Xinjiang, the Hexi Corridor of Gansu, and the central and western parts of Inner Mongolia.Vegetation recovery has played a certain role in reducing the amount of dust in the sand source area and the dangers of the sandstorm.However, the Gobi Desert in southern Mongolia is also an important source of sand and dust affecting China. In 2022, the growth of vegetation in southern Mongolia was compared with the average status in recent years.
He said: "During this time, there was less precipitation in Mongolia and northern China.With the surface conditions of the exposed sand and dust sources, frequent sand and dust weather. "
