What is the "black storm" incident in the United States?

It refers to the huge storm natural disaster that occurred in the United States on May 1934.

On May 1934 and 12, a huge storm swept across a large area of land in the eastern United States and western Canada. The storm came from the arid area with the most serious land damage in the western United States. Strong winds enveloped the sky in yellow dust and swept eastward, forming a huge moving dust belt with a length of 2400 kilometers from east to west, a width of 1.500 kilometers from north to south and a height of 3.2 kilometers.

At that time, the concentration of sediment in the air reached 40 tons/cubic kilometer. The storm lasted for three days and swept two-thirds of the land in the United States. More than 300 million tons of soil was scraped away. Where the wind passed, wells and streams dried up, cattle and sheep died, people left their homes and were desolate. This is the "black storm" that shocked the world. "Black storm", also known as sandstorm or sandstorm, has occurred several times in the United States, mainly because of the destruction of vegetation caused by land reclamation in the United States during the pioneering period.

Extended data

The cause of the black storm

Sandstorm usually occurs at the turn of spring and summer, and its formation is related to atmospheric circulation, topography and climate factors, as well as man-made ecological environment destruction. This is a symbol of the intensification of desertification. The rapid growth of population has brought unreasonable land reclamation, overgrazing, excessive logging and monoculture, which will inevitably lead to the destruction of vegetation and surface structure, grassland desertification and ecosystem imbalance. Because this sand-making speed is much faster than that of people, it undoubtedly provides conditions for the formation of sandstorms.

The occurrence of sandstorm is the result of the comprehensive action of population, resources and environment. The raging sandstorm is a challenge and warning to mankind. If human beings can't control development, if their infinite desires contradict the limited resources of the earth, and if they can't help each other with nature, they will eventually be defeated by themselves.

People's Daily Online-1934 The "black storm" in the United States lasted for three days.

Baidu Encyclopedia-Black Storm