Beijing duststorm caused by dried salt lakes |
文章来源： 文章作者： 发布时间：2007-04-13 07:04 字体： [ 大 中 小] 进入论坛 |
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| Chinanews, Beijing, Apr. 12 – The sandstorms in Beijing are actually “dust storms.” The dust is blown to Beijing from dried salt lakes, wasteland, and degraded grassland1, said experts from the Institute of Geology under the Chinese Academy of Geological Sciences (CAGS) on Wednesday when attending an academic seminar.
Han Tonglin, a researcher from CAGS, said that on April 16, last year, a total of 336,000 tons of sand fell in Beijing in the form of a large sandstorm. After the sandstorm, he and his 7 other fellow researchers carried out an investigation2 in Hebei and Inner Mongolia. Later they wrote two reports on the research results titled “The Nature of the Sandstorms in Beijing and Tianjin and How to Handle Them” and “Proposals on the Beijing and Tianjin Sandstorms Handling Work.” The two reports aroused high attention from the State Development and Reform Commission, which later responded to their reports. Both reports give scientific analysis of the sandstorm happening in Beijing on April 16 from geological environmental perspective. The two reports conclude that the sandstorm that occurred on that day was caused mainly by dust in the dried salt lakes in Inner Mongolia, and some by dust from wasteland and degraded grassland. Since deserts and sand land contained little dust, they were not the sources for the sandstorm that occurred on April 16 in Beijing.
For the past 50 years, people in Beijing and Tianjin have tried to control sandstorms by planting many trees. However, this method has not been very effective. The reason is because the sandstorms in Beijing and Tianjin are not actually “sandstorms” but “duststorms.” The dust can be blown to 2,000-3,000 meters high in the air by wind before it falls down to the ground. Trees can not stop such dust at all, said Lin Jingxing, one of Han’s fellow researchers.
In order to prevent such duststorms, people should improve the ecological3 environment of dried salt lakes. Instead of planting trees, people should grow more grass on the earth.
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grassland
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| n.牧场，草地，草原 |
参考例句： |
- There is a reach of grassland in the distance.远处是连绵一片的草原。
- The snowstorm swept the vast expanse of grassland.暴风雪袭击了辽阔的草原。
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investigation
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| n.调查，调查研究 |
参考例句： |
- In an investigation,a new fact became known, which told against him.在调查中新发现了一件对他不利的事实。
- He drew the conclusion by building on his own investigation.他根据自己的调查研究作出结论。
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ecological
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| adj.生态的，生态学的 |
参考例句： |
- The region has been declared an ecological disaster zone.这个地区已经宣布为生态灾难区。
- Each animal has its ecological niche.每种动物都有自己的生态位.
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