What is the sandstorm in Japan?

According to Japanese media reports, the Japan Meteorological Agency said that sandstorms were observed on the 7th, covering a vast area from western to northern Japan, including parts of kanto region.

* * * The current affairs news agency reported on May 7 that the Japan Meteorological Agency said that the strong wind blowing from China carried the yellow sand until the 8th, mainly concentrated in the western part of Japan. The Meteorological Agency warned that traffic may be disturbed due to low visibility.

According to the Japan Meteorological Agency, in Kumamoto Prefecture, the visibility from 3 am to 6 am on the 7 th has dropped to 8 kilometers. When the visibility drops below 10 km, the smog can be clearly seen from a distance.

On the 7th, dusty air was observed in Hokkaido, Northeast China, Central China, Kansai and Kyushu. Dust weather also appeared in Gunma and Ibaraki counties.

The sand blowing observed in western Japan on the 6th was the first time this year. This is the latest sandstorm weather that has been monitored since 1967 in Japan.

According to reports, on the 4th, Beijing was hit by a severe sandstorm, which led to the cancellation of several flights. For health reasons, officials called on local residents to stay indoors.

Dust weather is widely observed in Japan (news agency)

Further reading: sandstorm (weather phenomenon) sandstorm is the general name of sandstorm and the symbol of desertification. It refers to a disastrous weather phenomenon that strong winds roll up a lot of dust on the ground, making the horizontal visibility less than 1 km. It has the characteristics of suddenness and short duration, low probability and great harm. [ 1]? Among them, sandstorm refers to a sand-laden storm formed by strong wind blowing a large amount of sand near the stratum; Sandstorm is a storm formed by strong winds, which brings a lot of dust and other particles into the sky.

As one of the natural disasters in arid and semi-arid areas, sandstorm in the history of sandstorm is not a modern product. According to scientists' determination of deep-sea rock cores and ice sheet sediments, sandstorms appeared on the earth as early as the end of Cretaceous (70 million years ago). More than 3000 years ago, there were records of "Yellow Sand", "Rain Dust", "Rain Dust" and "Huang Ting" in Chinese history books. According to historical records, there were 70 sandstorms in China from the 3rd century BC to 2 154 in 949, with an average of 3 1 year. However, since the 1950s, the frequency of sandstorms in China has increased rapidly, and sandstorms in China have shown a new trend of early occurrence and wide influence. The spatial law of sandstorms in China is that there are more in the west and less in the east, and more in the north and less in the south, mainly concentrated in the arid and semi-arid areas of northwest and north China; Sandstorms happen all year round. According to Zhao Jingbo's statistics of 494 monthly sandstorms in China, sandstorms mainly occurred in February-May, accounting for 78. 3%, of which March-April is the most frequent, accounting for 49.2% of the total, followed by February and May, and less in other months. The daily variation of sandstorm is mainly concentrated from noon to evening, and it is relatively less from night to noon.