| 巴丹吉林沙漠及其毗邻地区的景观类型及其形成机制初探 |
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| 引用本文： | 杨小平.巴丹吉林沙漠及其毗邻地区的景观类型及其形成机制初探[J].中国沙漠,2000,20(2):166-170. |
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| 作者姓名： | 杨小平 |
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| 作者单位： | 中国科学院 地质与地球物理研究所, 北京 100029 |
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| 基金项目： | 国家自然科学基金!( 4 990 2 0 15 )，中国科学院资源与生态环境研究重点项目!( KZ95 2 -5 1-4 3 8)资助 |
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| 摘 要： | 利用气候地貌学原理,分析研究了巴丹吉林沙漠及其毗邻地区的景观类型。研究地区的现代景观形态主要是风营力地形、荒漠平原及准平原。由于气候向干旱发展,古老的准平原正在向荒漠平原过渡,而在周围山地上的荒漠沟谷地区也已出现了风成沙,形态上成为荒漠沟谷向风营力地形的过渡形式。在古湖盆地区因湖泊干枯,地表形态正在向风营力地形方向发展。根据沙丘上的胶结面及周围湖泊的水位变化,笔者初步认为在西风环流的作用下,巴丹吉林地区在30 ka B.P.,20 ka B.P.时曾有过较湿润的气候。类似的情况在全新世时也出现过多次,但这主要是受夏季风的影响。
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| 关 键 词： | 景观 气候地貌 全球变化 巴丹吉林沙漠 |
| 收稿时间： | 1999-03-15 |
| 修稿时间： | 1999-05-20 |
Landscape Types and its Formation Mechanism in the Badain Jaran Desert and its Surrounding Areas |
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| YANG Xiao-ping.Landscape Types and its Formation Mechanism in the Badain Jaran Desert and its Surrounding Areas[J].Journal of Desert Research,2000,20(2):166-170. |
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| Authors: | YANG Xiao-ping |
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| Institution: | Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China |
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| Abstract: | On the basis of climatic geomorphology, the author investigates the types of landscape in the Badain Jaran Desert and its surrounding areas. The present forms of landscape in the research area are mainly aerodynamic relief, desert plain and pediment. Because the climate becomes drier, the former pediment is undergoing the transformation toward desert plain. Aeolian sand comes into appearance in the place of former desert gorges in the surrounding mountains. The fossil desert gorges are becoming the intermediate form between desert gorges and aerodynamic relief. In the old lake basin, the land surface is now under development of aerodynamic relief because of the disappearance of water. Based on the consolidation on the dune surface and water level changes of surrounding lakes, the author concludes that it was more humid at the times present than 30 ka B.P. than at present and 20 ka B.P. in the areas of Badain Jaran owing to the influence of westerlies. The similar situation happens several times during Holocene, but these were due to the variation of the Asian summer monsoon. |
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| Keywords: | landscape climatic geomorphology global change Badain Jaran Desert |
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