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首页> 外文期刊>Geomorphology >Geomorphological Hierarchies For Complex Mega-dunes And Their Implications For Mega-dune Evolution In The Badain Jaran Desert
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Geomorphological Hierarchies For Complex Mega-dunes And Their Implications For Mega-dune Evolution In The Badain Jaran Desert

机译：巴丹吉林沙漠中大型沙丘的地貌层次结构及其对大沙丘演化的启示

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摘要

The evolution of mega-dunes is sometimes attributed to factors other than the wind but evidence for this is lacking. It is assumed that the dominance of wind in maintaining the evolution of mega-dunes should be characterized by regular height-spacing relationships that have been found for simple dunes or wind ripples which are dominantly formed by the wind. In this context, we studied the height-spacing relationship for the complex reversing mega-dunes in the Badain Jaran Desert, which features the tallest mega-dunes in the world. The complex mega-dunes were divided into three hierarchical orders according to the cumulative probability plots of dune height and spacing measurements, and the coefficients of variability of dune heights and spacings were in accordance with values reported for other deserts. The relationship between dune spacing and height for all the three orders of dunes could be expressed reasonably well by a uniform linear function that was also applied to the height-wavelength relationship for wind ripples in other deserts. This relationship was found to be similar to those for several other deserts and subaqueous bedforms. This implies that there should be few unique factors in maintaining the evolution of complex mega-dunes in the Badain Jaran Desert compared with the superimposed simple dunes and dunes in other deserts, dune fields and subaqueous bedforms, and that the tailest mega-dunes on the earth can be maintained by the wind.
机译：巨型沙丘的演变有时归因于风以外的其他因素，但缺乏证据。假定风在保持巨型沙丘演变过程中的主导地位应以规则的高度-间距关系为特征，这种关系是针对简单的沙丘或主要由风形成的风波纹而发现的。在这种情况下，我们研究了巴丹吉林沙漠中复杂的反转大沙丘的高度-间距关系，该沙漠具有世界上最高的大沙丘。根据沙丘高度和间距测量的累积概率图，将复杂的大型沙丘分为三个等级，沙丘高度和间距的变异系数与其他沙漠报道的值一致。三个统一的沙丘高度之间的沙丘间距和高度之间的关系可以通过统一的线性函数很好地表达，该函数也可以应用于其他沙漠中风波纹的高度-波长关系。发现这种关系与其他几种沙漠和水下床形的关系相似。这意味着与其他沙漠，沙丘田地和水下床形中叠加的简单沙丘和沙丘相比，保持巴丹吉林沙漠中大型沙丘演化的独特因素应该很少，并且沙丘上最尾的大型沙丘风可以维持地球。

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  • 来源
    《Geomorphology》 |2009年第4期|180-185|共6页
  • 作者

    Zhibao Dong; Guangqiang Qian; Wanyin Luo; Zhengcai Zhang; Shengchun Xiao; Aiguo Zhao;

  • 作者单位

    Department of Geography, Shaanxi Normal University, China Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, China;

    Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, China;

    Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, China;

    Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, China;

    Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, China;

    Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, China;

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  • 正文语种 eng
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  • 关键词

    aeolian geomorphology; dune patterns; dune height-spacing relationship;

    机译：风沙地貌;沙丘格局;沙丘高度间距关系;

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