干旱区生态环境知识资源中心(Arid): 塔克拉玛干沙漠腹地垄间地上覆沙丘形态的空间变化特征及其成因

Arid

	塔克拉玛干沙漠腹地垄间地上覆沙丘形态的空间变化特征及其成因
其他题名	Spatial variation and formation mechanism of dune morphology in the dominant wind direction on interdune corridors of complex ridges in central Taklimakan Desert
	王宁波 1; 李生宇1 ; 王海峰 1; 徐新文1 ; 贾文茹 1; 张忠良 2; 田野 2
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2014
卷号	37 期号:1 页码:89-96
中文摘要	垄间地是塔克拉玛干沙漠中的一种典型下垫面,发育有众多尺度小、形态简单的沙丘,而这些沙丘的分布及其形态的空间变化和成因,至今研究较少。基于Google Earth影像和实地观测,研究了塔克拉玛干沙漠腹地垄间地上覆沙丘在主导风向上的分布格局和形态特征,并分析了其成因。结果表明:(1)垄间地分布有沙片、新月形沙丘、新月形沙丘链和线性沙丘,但新月形沙丘分布最广泛、数量最多,沙丘数量次之,在整个垄间地都有分布,新月形沙丘链集中.分布在沙垄背风坡脚,而线性沙丘则主要分布在沙垄迎风坡脚;(2)垄间地上覆沙丘具有明显的空间分布格局,沿主风向,沙丘密度和覆盖度呈上风向 > 下风向 > 中部,而新月形沙丘的长度、宽度、底面积、两翼开展度等形态示量参数,从沙垄落沙坡脚到垄间地中部偏迎风坡各参数呈现不同程度下降,沙丘呈逆向演变,随着靠近沙垄迎风坡脚各参数逐渐增大,沙丘又转为正向发育;(3)沙丘的空间分布和形态差异源于地表风动力和沙源供给的空间分异。沙垄背风坡脚风动力相对较弱,沙源丰富,沙丘密度高,新月形沙丘形态发育成熟度高;沙垄背风坡脚到垄间地近迎风坡脚,气流摆脱沙垄风影影响,风速逐渐增大,地表粗沙覆盖,沙源供给相对减少,沙丘物质收支失衡,形态趋于逆向演变;从垄间到沙垄迎风坡脚,受沙垄阻挡,风速降低,地表沙物质相对较细,地表沙源供给相对较充足,沙丘物质收支状况改善,沙丘形态有所恢复。
英文摘要	There exist a large number of dunes in small size and simple shape on interdune corridors in the Taklimakan Desert, while the distribution and the spatial variation and cause of which are poorly studied so far. Based on Google Earth images and field surveys, this paper mainly discusses the cause of the distribution pattern and morphological characteristics of the dunes on interdune corridors in the Taklimakan Desert. The results are as follows: (1) There exist pie-shaped dunes, barchans, barchan chains and linear dunes on interdune corridors in the central of Taklimakan Desert. The density and coverage of barchans are the highest among the four types, while the pie-shaped dunes, widely distributed on all interdune corridors, rank only second to barchans. Barchan chains are mainly distributed in the leeward slope toe, but linear ones in the windward slope toe of complex sand ridges. (2) There is a distinct pattern of spatial distribution of the dunes in this area. The density and coverage of barchans in the dominant wind direction ranks in order of windward, leeward, central, whereas the length, width, basal area, coverage and wingspan decrease from the leeward slope toe of sand ridges to the middle of interdune corridors, but gradually increase from the middle of interdune corridors to the windward slope toe of sand ridges under similar conditions. It indicates that barchans first degrade and then recover on interdune corridors. (3) The spatial distribution and morphological differences of dunes are determined by the spatial variation of sand supply and wind force. In the leeward slope toe of sand ridges, the wind force is relatively slight and the sand source is rich, moreover, the dunes are distributed in high density and barchans maturely developed to great extent. From the leeward slope toe of sand ridges to the near windward slope toe, the airflow is hardly influenced by wind shadow of complex sand ridges, thus the wind speed rises gradually and the sand supply decreases accordingly due to the coarse sand covered surface. Then there tend to be an imbalance of the sand flux, so barchans have a reverse evolution trend. From the middle of interdune corridors to the windward slope toe of sand ridges, the wind speed reduces due to the blocking of sand ridges. Besides, the sand is fine and the supply is relatively sufficient. In that case, the dune compounds are improved and dunes recovered.
中文关键词	沙丘类型 ; 沙丘发育指数 ; 新月形沙丘 ; 垄间地 ; 塔克拉玛干沙漠
英文关键词	dunes types dune development index crescent dune Interdune corridor Taklimakan Desert
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:5067504
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231103
作者单位	1.中国科学院新疆生态与地理研究所, 乌鲁木齐, 新疆 830011, 中国; 2.中国石油天然气股份有限公司塔里木油田分公司, 库尔勒, 新疆 841000, 中国
推荐引用方式 GB/T 7714	王宁波,李生宇,王海峰,等. 塔克拉玛干沙漠腹地垄间地上覆沙丘形态的空间变化特征及其成因[J]. 中国科学院新疆生态与地理研究所,2014,37(1):89-96.
APA	王宁波.,李生宇.,王海峰.,徐新文.,贾文茹.,...&田野.(2014).塔克拉玛干沙漠腹地垄间地上覆沙丘形态的空间变化特征及其成因.干旱区地理,37(1),89-96.
MLA	王宁波,et al."塔克拉玛干沙漠腹地垄间地上覆沙丘形态的空间变化特征及其成因".干旱区地理 37.1(2014):89-96.