| 沙漠与沙漠化 |
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| Status and Prospect of Study on Two Focuses in Aeolian Physics |
| DING Guo-dong |
| College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China |
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Abstract Aeolian Physics has built a complete own system after decades development and improvement. However, there are still lots of important theories or problems havent been solved thoroughly or at least no consensus has been reached in academic circles due to late start of subject and complexity of phenomena. As a result, they become the bone of contention in academic field, which have constrained the development of Aeolian Physics. As for the two focus, starting mechanism of sand grains and formation mechanism of aeolian ripples, this paper gives its prospect of study concepts on the basis of analyzing its present study status. A view is put forward that the stagnation point lift is the main driving force for sand grains to start, besides, research on the mechanism of sand grains starting which based on aerodynamics will become the principal trend in this field. In terms of ripples formation, the author holds that its prerequisite and basis are unevenness of sand grain diameter and non-equilibrium movement resulted from unevenness; its necessity of maintaining the ripples shape is the erosion-accumulation transforming regulation that controls the movements of sand dunes. The ripple's regular and uniform distribution and arrangement may have something to do with the small-scale vortex in the leeward side.
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Received: 13 April 2007
Published: 20 May 2008
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2008, Vol. 28 
