干旱区地理2023，Vol.46Issue(12)：1995-2004,10.DOI:10.12118/j.issn.1000-6060.2023.373
塔克拉玛干沙漠腹地沙尘暴对新月形沙丘表面粒度变化的影响
Effect of sandstorms on surface particle size variation of barchan dunes in the hinterland of Taklimakan Desert
摘要
Abstract
This study focuses on the barchan dunes situated in the hinterland of the Taklamakan Desert in Xinji-ang,China.Our observations tracked the morphological evolution of a specific dune as it transforms from a barchan dune to an irregular dune and back to a barchan dune under the influence of sandstorms.By examining the particle size of surface sand across different dune morphologies,we investigate the impact of sandstorms on the particle size distribution in barchan dunes.Our findings reveal the following:(1)The particle size of surface sand along the central axis of the windward slope remains constant before and after the deformation and recovery of the barchan dune.However,there is a gradual increase in coarseness from the dune's base to its summit.This suggests that,under similar wind direction and force conditions,sandstorms exert minimal influence on the parti-cle size distribution pattern on the windward slope of barchan dunes with comparable morphology.(2)Both the central axis and sand ridges of the barchan dune predominantly feature extremely fine and fine sand.The average content of extremely fine sand and fine sand is 83.07%and 82.81%on the central axis of the windward slope and the leeward slope,and 84.42%and 91.20%on the left and right sand ridges,respectively.Moreover,after the sandstorm,the surface sand of the recovered barchan dune exhibits well-sorted and consistent characteristics,with an overall finer particle size,indicating a significant influence of the sandstorm on the particle size character-istics of the surface sand.These results offer valuable insights into the spatial distribution pattern of surface sand in barchan dunes under the impact of sandstorms.关键词
沙尘暴/新月形沙丘/粒度/塔克拉玛干沙漠Key words
sandstorm/barchan dune/particle size/Taklimakan Desert引用本文复制引用
陈京平,余子莹,杨帆,王蜜,胡涵,丁璇,高鑫,王鑫..塔克拉玛干沙漠腹地沙尘暴对新月形沙丘表面粒度变化的影响[J].干旱区地理,2023,46(12):1995-2004,10.基金项目
第三次新疆综合科学考察项目(2021xjkk0302) （2021xjkk0302）
国家自然科学基金委面上项目(42072211)资助 （42072211）
