With the gust of magnitude 7 and the sandstorm of magnitude 8+, why is the weather in Beijing so bad?

After nearly a decade, the sandstorm struck again. Basically, most of this northern region will be affected and will move from north to south. After the sandstorm strikes, it will probably reach the vicinity of the Qinling Mountains, and will weaken and gradually disappear. The worst-hit areas are most of Inner Mongolia, most of Liaoning, Beijing, Tianjin, Hebei, Shanxi and parts of Shaanxi and Gansu. Yellow sand covers the sky like dusk on earth, and the air pollution index rises to a very serious level.

1. The sandstorm originated in Mongolia.

From ten years ago to now, there are few sandstorms in Beijing, Tianjin and Hebei, even if there are, it is a little bit, not as serious as it is now. According to experts' explanation, this sandstorm originated in Mongolia and was blown by cold air, not a sandstorm in our country. It goes all the way without hindrance, hitting the key link of China inland complex.

Second, the causes of sandstorm formation

The vegetation on the surface reduces desertification, the climate is dry and there is little rain, and the strong wind that leads the air south carries the sediment running all the way. This is how sandstorms are formed. At least that's the reason for this sandstorm. It's just why there is no parking link all the way south. This is the most incredible place.

Third, the forest blocks sandstorms.

Of course, we all know that vegetation is the foundation of sand prevention and control, and trees are the most effective way to stop sandstorms. Of course, the sandstorm originated in Mongolia in recent days, and we can't stop it, but we can't stop it. We can stop them from going south. Shelterbelts built for decades should be effective at this time, but sandstorms have been so serious in recent days that we feel there is no stopping effect at all. Of course, the height of the shelter forest determines that it is impossible to completely stop the sandstorm, and at most it can only protect the sandstorm at the lower level. The dust floating in midair can't be stopped. That's true, but the problem is that protecting the lower sandstorm can actually reduce sandstorms by more than 60%, which means that the dust brought by the upper sandstorm will be greatly reduced. But now it seems that the severity of the sandstorm is basically the same as that of the shelter forest, which has no effect and can't stop the sandstorm.