On the sand surface stability in the southern part of Gurbantünggüt Desert
Longitudinal dunes are the most widespread dune types in the world sand seas but comprehensive study on the sand surface stability is scarce. The southern part of Gurbantünggüt Desert is mainly covered by longitudinal dune in which fixed and semi-fixed dunes occupy over 80% of the total area. Systematic analysis on the climatic conditions, the soil moisture and vegetation distributions, and the sand surface activities showed that the fixed and semi-fixed dunes are in a comprehensive low-energy wind environment. Snow cover and frozen soil provide a good protection to the ground surface in winter. The temporal distribution of precipitation and corresponding variation of temperature create a favorable condition for the desert plants growth, especially for the ephemeral plants. The occurrence of effective winds for sand moving in April to June coincides with the stage of relatively wet sand surface and good vegetation cover, which effectively keep the sand surface stable at the interdune and the plinth of the dunes. Activity sand surface appears only at the crest and the upper part of the sand dunes.
作 者： WANG Xueqin WANG Tao JIANG Jin ZHAO Congju 作者单位： WANG Xueqin(Laboratory of Blown Sand Physics and Desert Environment, Cold and Arid Regions of Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China; Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urümqi 830011, China)WANG Tao(Laboratory of Blown Sand Physics and Desert Environment, Cold and Arid Regions of Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China)
JIANG Jin,ZHAO Congju(Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urümqi 830011, China)
刊 名： 中国科学D辑（英文版） SCI 英文刊名： SCIENCE IN CHINA SERIES D:EARTH SCIENCES 年，卷(期)： 2005 48(6) 分类号： P3 关键词： Gurbantünggüt Desert longitudinal dune sand surface stability