干旱区生态环境知识资源中心(Arid): 额济纳旗典型地表沙尘释放潜力及沙尘天气频发成因

Arid

	额济纳旗典型地表沙尘释放潜力及沙尘天气频发成因
其他题名	Potential of Dust Emission and Causes of Frequent Sandstorm Activities in Ejina Banner,Inner Mongolia,China
	李宽 1; 贾晓鹏 2; 熊鑫 3; 王海兵 3; 李钢铁 3
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2019
卷号	39 期号:3 页码:191-198
中文摘要	额济纳旗位于极端干旱的内陆河下游,绿洲退化严重,沙尘天气频发,已成为内蒙古西部主要沙尘源区。为揭示该区域沙尘频繁成因,对区域4种典型地表(富沙砾戈壁、富沙戈壁、绿洲退化地、绿洲)沉积物组分、风蚀强度、沙尘释放强度、多年平均月沙尘日数及大风日数等进行了综合分析。结果表明:以风沙活动为主要特征的绿洲退化地,粉沙黏土组分含量高,PM_(10)沙尘释放强度大(0.2796 kg·d~(-1)·m~(-2)) ,为研究区强沙尘释放地表;富沙及富沙砾戈壁地表,风蚀强度大,但粉沙黏土组分含量低,PM10沙尘释放强度较大(0. 1267 kg·d~(-1)·m~(-2),0. 0672 kg·d~(-1)·m~(-2)) ;尽管绿洲地表粉沙黏土组分含量高,但由于植被、水分等因素的制约,其PM_(10)沙尘释放强度最小(0.0240 kg·d~(-1)·m~(-2)) 。额济纳旗绿洲被大面积强沙尘释放源(绿洲退化地和戈壁)包围,局地沙尘内循环过程中粉尘颗粒的富积,为当地高频沙尘天气提供了丰富的尘源,这是额济纳旗沙尘天气频发的主要原因。
英文摘要	Ejina Banner,located in the downstream of Heihe River in extreme arid areas with serious oasis degradation and frequent sandstorm,is one of the dust emission areas in the west of Inner Mongolia of China. Data on sediment components from four types of typical surface area (sand gravel gobi,sand-rich gobi,degraded oasis,and oasis) ,intensity of wind erosion and dust emission,average days of dust and wind was comprehensively analyzed to reveal causes of frequent sandstorm activities in this region. The results showed that degraded oasis is the high dust emission areas with high content of clay components and PM_(10) dust emission intensity (0.2796 kg·d~(-1)·m~(-2)) . The gobi with the surface of sand-rich and sand gravel is a weak dust emission area which showed strong wind-induced erosions with low content of silt clay and low PM_(10d)ust emission intensity (0.1267 kg·d~(-1)·m~(-2) and 0.0672 kg· d~(-1)·m~(-2)) . Although the oasis surface is rich in clay components,the PM10 dust emission is weak (0.0240 kg·d~(-1) ·m~(-2)) due to the influence of vegetation and soil moisture. Therefore,the strong sandstorm activity in Ejina Banner is due to its geographic location surrounded by large areas of degraded oasis and gobi as well as possible internal dust circulation process locally.
中文关键词	风蚀强度 ; 沙尘释放 ; 典型地表 ; 额济纳旗
英文关键词	wind erosion intensity dust emission typical surface Ejina Banner
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:6502713
来源机构	中国科学院西北生态环境资源研究院 ; 内蒙古农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/239797
作者单位	1.内蒙古农业大学沙漠治理学院;;内蒙古自治区土地调查规划院, 内蒙古风沙物理与防沙治沙工程重点实验室;;, 呼和浩特;;呼和浩特, 内蒙古;;内蒙古 010011;;010011, 中国; 2.中国科学院西北生态环境资源研究院, 中国科学院沙漠与沙漠化重点实验室, 兰州, 甘肃 730000, 中国; 3.内蒙古农业大学沙漠治理学院, 内蒙古风沙物理与防沙治沙工程重点实验室, 呼和浩特, 内蒙古 010011, 中国
推荐引用方式 GB/T 7714	李宽,贾晓鹏,熊鑫,等. 额济纳旗典型地表沙尘释放潜力及沙尘天气频发成因[J]. 中国科学院西北生态环境资源研究院, 内蒙古农业大学,2019,39(3):191-198.
APA	李宽,贾晓鹏,熊鑫,王海兵,&李钢铁.(2019).额济纳旗典型地表沙尘释放潜力及沙尘天气频发成因.中国沙漠,39(3),191-198.
MLA	李宽,et al."额济纳旗典型地表沙尘释放潜力及沙尘天气频发成因".中国沙漠 39.3(2019):191-198.