干旱区生态环境知识资源中心(Arid): Optical dating reveals that the height of Earth's tallest megadunes in the Badain Jaran Desert of NW China is increasing

Arid

DOI	10.1016/j.jseaes.2019.104025
	Optical dating reveals that the height of Earth's tallest megadunes in the Badain Jaran Desert of NW China is increasing
	Wang, Xingfan 1,3; Zhao, Hui 1,2; Yang, Hongyu 1,3; Wang, Keqi 1,3
通讯作者	Zhao, Hui
来源期刊	JOURNAL OF ASIAN EARTH SCIENCES
ISSN	1367-9120
EISSN	1878-5786
出版年	2019
卷号	185
英文摘要	The Badain Jaran Desert (BJD) in NW China is well known for its unique landscape of megadunes coexisting with permanent lakes. The megadunes are already the tallest sand dunes on earth, and some of them are up to 400 m high. However, it is unclear whether or not the height of the megadunes is continuing to increase under present climatic and environmental conditions. In order to determine the growth status of the megadunes, we collected 26 samples from the windward slopes of two megadunes for optically stimulated and infrared stimulated luminescence dating. The results show that the thickness of the modern eolian sand layers increases from the lower part of the windward slopes, with a thickness of less than 1 m, to more than 2 m in the middle, and to 9 m in the upper part. This indicates that the height of the megadunes is continuing to increase under modern conditions. The surface sediments from the base of the windward slope and the adjacent lake basin have relatively old ages of 6-7 ka, indicating that these areas are eroding. The recent eolian sands of the upper part of the megadunes likely originated from the base of the dunes or from the lake basin. The megadunes in the BJD are currently becoming increasingly high and steep due to the upward migration and accumulation of sand particles. Increased humidity and a weakened wind regime in northern China, related to ongoing climatic warming, are likely the main factors in maintaining the growth of the megadunes.
英文关键词	Optical dating Badain Jaran Desert Megadunes Growth
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000496840600003
WOS关键词	SINGLE-ALIQUOT ; HORQIN DUNEFIELD ; NORTHERN CHINA ; DUNE EVOLUTION ; K-FELDSPAR ; SAND DUNES ; WIND-SPEED ; LUMINESCENCE ; QUARTZ ; OSL
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
EI主题词	2019-11-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310655
作者单位	1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Desert & Desertificat, Lanzhou 730000, Gansu, Peoples R China; 2.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China; 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xingfan,Zhao, Hui,Yang, Hongyu,et al. Optical dating reveals that the height of Earth's tallest megadunes in the Badain Jaran Desert of NW China is increasing[J],2019,185.
APA	Wang, Xingfan,Zhao, Hui,Yang, Hongyu,&Wang, Keqi.(2019).Optical dating reveals that the height of Earth's tallest megadunes in the Badain Jaran Desert of NW China is increasing.JOURNAL OF ASIAN EARTH SCIENCES,185.
MLA	Wang, Xingfan,et al."Optical dating reveals that the height of Earth's tallest megadunes in the Badain Jaran Desert of NW China is increasing".JOURNAL OF ASIAN EARTH SCIENCES 185(2019).