| 沙漠与沙漠化 |
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| A Preliminary Study of Relation Between Megadune Shape and Wind Regime in the Badain Jaran Desert |
| LIU Tao1,2, YANG Xiao-ping1, DONG Ju-feng1, FAN Xing-yan1, LI Hong-wei1,2, ZHU Bing-qi1 |
| 1.Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China; 2.Graduate University of Chinese Academy of Sciences, Beijing 100049 |
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Abstract The relation between megadune shape and wind regime in the Badain Jaran Desert are systematically investigated by means of meteorological data analysis, remote sensing image interpretation, geomorphologic fieldwork, dune morphometry and particle size analysis. The results show that the sand drift potentials are characterized by changes with high frequency during the last 40 years, especially in the southeast part of the desert. Most megadunes strike NE—SW, reflecting the wind regime in this region is characterized by seasonal abrupt changes of wind directions. Both the lee and the stoss sides of the megadunes are steep, not consistent with the common shape of transverse dunes. The grain size distribution patterns of samples along the cross-sections of dunes vary considerably between dunes with the regular strikes (NE—SW) and those with irregular forms, indicating that multiple parameters and processes are jointly responsible for shaping the dunes in the study area.
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Received: 18 January 2010
Published: 20 November 2010
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2010, Vol. 30 
