Observational Study on Near-surface Horizontal Sand-dust Flux of Sandstorms in the Southeastern Fringe of the Taklimakan Desert
Aeolian sand-dust transport is a serious problem in many arid regions in the world,and it is considered to be the significant part of global biogeochemical cycles.While deserts are the main source of aeolian sand-dust transport in the near-surface layer,and aeolian sand-dust transport processes are closely related to the variation of near-surface horizontal sand-dust flux with height.This paper discusses the variation of horizontal sand-dust flux within 0-2 m with height over the ground surface based on one-year observation on sandy land in the southeastern Taklimakan Desert by BSNE samplers.It is revealed that horizontal sand-dust flux amount decays with height,which can be described by power function.There is about 66 ％ of the horizontal sand-dust flux transported within 0-50 cm over the ground surface,and 80 ％ is transported within 0 -100 cm over the ground surface.In the studied area,the horizontal sand-dust flux passing height from 0 to 200 cm is 3627.9 kg·m-1,among them,the amounts of PM80 and PM50 are 1430.4 kg·m-1 and 216.2kg· m-1,respectively.
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