干旱区生态环境知识资源中心(Arid): 基于绿洲尺度大气降尘粒度空间分异特征

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	基于绿洲尺度大气降尘粒度空间分异特征
其他题名	Spatial differentiation characteristics of aeolian deposit grain size at the oasis scale
	林永崇; 穆桂金; 徐立帅; 陈丽玲
来源期刊	干旱区资源与环境
ISSN	1003-7578
出版年	2021
卷号	35 期号:10 页码:149-154
中文摘要	大气沙尘传输过程中一般会沿着风向发生沉积分选,沉积物粒度特征将发生空间分异。而多大的空间尺度上才能显示出沉积分异作用目前还未被清楚地认识。通过对策勒绿洲两期大气降尘10个位置降尘粒度特征分析,试图揭示风成沉积粒度在绿洲尺度空间分异特征。结果显示:在绿洲尺度上各个采样点风成沉积粒径范围在0.4-250mum之间,都表现出双峰态粒度分布特征,主峰态众数集中在67-75mum,次峰态众数集中在15-24mum之间,两个子峰态粒度特征各自十分一致,都未在绿洲尺度上出现明显的空间分异。稳定一致的粒度特征指示其空间上经历一致的沉积分选作用,因此,风成沉积粒度特征是区域风场强度有效的环境代用指标。
英文摘要	In the process of atmospheric dust transportation, sedimentary differentiation generally occurs along the wind direction, and the grain size characteristics of the sediment will be spatially differentiated. The spatial scale at which the sedimentary differentiation can be shown has not been clearly understood. This study attempts to reveal the characteristics of the spatial differentiation of aeolian deposits at the oasis scale by analyzing the grain size characteristics of the atmospheric dustfall at 10 locations in Cele Oasis. The results show that the grain size of aeolian deposits at each sampling point on the oasis scale ranges between 0.4 mum and 250 mum, all showing bimodal particle size distribution characteristics. The main peak mode is between 67 mum and 75 mum, and the secondary peak mode is between 15mum and 24 mum, the grain size characteristics of the two sub-peaks are very consistent, and there is no obvious spatial differentiation on the oasis scale. Stable and consistent grain size characteristics indicate that they have experienced consistent sedimentation sorting in space. Therefore, the grain size characteristics of aeolian sediments are the effective environmental proxy indexes for the intensity of regional wind fields.
中文关键词	风成沉积 ; 粒度 ; 空间分异 ; 绿洲
英文关键词	aeolian deposit grain size spatial differentiation oasis
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Environmental Sciences & Ecology
CSCD记录号	CSCD:7099530
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377690
作者单位	林永崇, 闽南师范大学历史地理学院, 漳州, 福建 363500, 中国.; 陈丽玲, 闽南师范大学历史地理学院, 漳州, 福建 363500, 中国.; 穆桂金, 中国科学院新疆生态与地理研究所, 荒漠与绿洲生态国家重点实验室, 乌鲁木齐, 新疆 830011, 中国.; 徐立帅, 山西农业大学资源环境学院;;中国气象局乌鲁木齐沙漠气象研究所, ;;, 太谷;;乌鲁木齐, ;; 030801;;830002.
推荐引用方式 GB/T 7714	林永崇,穆桂金,徐立帅,等. 基于绿洲尺度大气降尘粒度空间分异特征[J],2021,35(10):149-154.
APA	林永崇,穆桂金,徐立帅,&陈丽玲.(2021).基于绿洲尺度大气降尘粒度空间分异特征.干旱区资源与环境,35(10),149-154.
MLA	林永崇,et al."基于绿洲尺度大气降尘粒度空间分异特征".干旱区资源与环境 35.10(2021):149-154.