Weather characteristics of sandstorm

Sandstorm is a general term for sandstorm and sandstorm. It refers to a severe sandstorm weather phenomenon in which strong winds blow and drag a large amount of sand and dust on the ground into the air, making the air particularly turbid and the horizontal visibility less than one kilometer. 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.

morphological character

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1The sandstorm wall stands high.

Most of the strong sandstorms in mainland China come from northwest or west.

There are also a few from the East. When almost all sandstorms come, we can see a black sand wall moving rapidly and getting closer and closer in the direction of the wind. Seen from a distance, the sandstorm wall is towering like a mountain, much like a city wall, and it is the sandstorm Depth Charge.

2. The sky is dark

When a strong sandstorm occurs, due to the strong wind of magnitude 8 or above, the wind is very strong and can roll up stones and sand. As more and more dust flies into the air, the thick dust is overwhelming, blocking the sun and making people see nothing for a period of time, just like at night.

3. Rolling and impact

Black wind blows, the air near the ground is unstable, the heated air below rises, and the surrounding air flows to supplement, causing the air to roll up and down with a lot of dust, forming countless dust clouds of different sizes to meet and surge in the air.

Red sandstorm (3 photos)

4. Great.

The upper layer of sand wall is often yellow to red, the middle layer is gray-black and the lower layer is black. The reason why the upper layer is yellow-red is because the dust on the upper layer is so thin that sunlight can almost shoot down through the dust. The dust in the lower layer has a large concentration and coarse particles, and the sunlight is almost completely absorbed or scattered by the dust, so it is black. Where the sand wall has moved, the sky is flickering and changing. This is caused by light passing through dust belts of different thickness and consistency.