干旱区生态环境知识资源中心(Arid): 塔克拉玛干沙漠腹地复合型纵向沙垄区近地层沙尘水平通量及粒度特征

Arid

	塔克拉玛干沙漠腹地复合型纵向沙垄区近地层沙尘水平通量及粒度特征
其他题名	Dust Horizontal Flux and Grain Size Characteristics of the Near-Surface on Compound Longitudinal Dunes in the Hinterland of Taklimakan Desert
	代亚亚 1; 何清 2; 陆辉 2; 杨兴华 2; 周长帅 1
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2016
卷号	36 期号:4 页码:918-924
中文摘要	利用BSNE梯度集沙仪采集塔克拉玛干沙漠腹地复合型纵向沙垄区近地层80m高度内秋季不同高度的沙尘物质,探讨沙尘天气下水平输沙通量差异及沙尘的粒度特征。结果表明:由于受到复合型纵向沙垄的影响,沙尘天气过程近地层沙尘水平通量并不遵循幂函数或指数函数分布,在20m以下随高度增加而降低,在32~63m随高度增加而增大,并且在24m和63m两个高度处出现转折点。各层沙尘平均粒径64~80mum,以极细沙为主,分选系数0.96~1.12,分选性中等偏差。粒径频率曲线呈双峰分布,主峰值出现在80~110mum,次峰值在10~12 mum,反映了沙尘组成的复杂性,远源沙尘在各高度层的变化幅度较小,以局地和区域源为主。沙尘水平通量与沙尘粒度变化表明沙尘天气主导风速风向、强烈的上升运动及纵向沙垄是影响沙尘水平通量垂直差异的重要因素。
英文摘要	In the hinterland longitudinal dunes of the Taklimakan Desert,in order to explore the differences of dust horizontal flux and grain size characteristics of the near-surface in dust weather,we use BSNE samplers to gather sand-dust of different heights within 80 meters above the surface in the fall of 2014.The results show that the horizontal sand-dust flux of the near-surface is neither in power function distribution nor exponential function distribution during dust weather processes due to the influence of the compound longitudinal dunes.It decreases with the height below20 meters,while increases with the height of 24-63 meters, and 24 m and 63 m are the turning points.The mean particle size of each layer is between 64-80mum, dominated by very fine sand.The sorting coefficient is between 0.96-1.12,belonging to general sorting. The grain size frequency curve shows double peaks in the distribution.The main peak appears between 80-110mum,the second peak in10-20mum.Multi peak reflects the complexity of the dust composition.Remote dust in each layer changes small,the major sand are local and regional sources.The variety of dust horizontal flux and grain size suggests that the leading wind speed and direction,strong rising motion and longitudinal dunes are the main reasons to the vertical differences.
中文关键词	塔克拉玛干沙漠 ; 沙尘水平通量 ; 粒度
英文关键词	Taklimakan Desert dust horizontal flux grain size
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:5821325
来源机构	新疆大学 ; 中国气象局乌鲁木齐沙漠气象研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235437
作者单位	1.新疆大学资源与环境科学学院, 乌鲁木齐, 新疆 830046, 中国; 2.中国气象局乌鲁木齐沙漠气象研究所, 乌鲁木齐, 新疆 830002, 中国
推荐引用方式 GB/T 7714	代亚亚,何清,陆辉,等. 塔克拉玛干沙漠腹地复合型纵向沙垄区近地层沙尘水平通量及粒度特征[J]. 新疆大学, 中国气象局乌鲁木齐沙漠气象研究所,2016,36(4):918-924.
APA	代亚亚,何清,陆辉,杨兴华,&周长帅.(2016).塔克拉玛干沙漠腹地复合型纵向沙垄区近地层沙尘水平通量及粒度特征.中国沙漠,36(4),918-924.
MLA	代亚亚,et al."塔克拉玛干沙漠腹地复合型纵向沙垄区近地层沙尘水平通量及粒度特征".中国沙漠 36.4(2016):918-924.