干旱区生态环境知识资源中心(Arid): Periodic variations of alpine glaciation and desertification of the NE Tibetan Plateau: Evidence from the loess-paleosol sequences in the Menyuan Basin

Arid

DOI	10.1016/j.gloplacha.2023.104160
	Periodic variations of alpine glaciation and desertification of the NE Tibetan Plateau: Evidence from the loess-paleosol sequences in the Menyuan Basin
	Xiao, Guoqiao; Dai, Gaowen; Tian, Shaohua; Peng, Shuzhen; Li, Liting; Meng, Xiaoqin; Yin, Qiuzhen
通讯作者	Xiao, GQ
来源期刊	GLOBAL AND PLANETARY CHANGE
ISSN	0921-8181
EISSN	1872-6364
出版年	2023
卷号	226
英文摘要	The NE Tibetan Plateau (NETP) is one of the most ecologically vulnerable areas, with large expansion and retreat of desert area since the Last Glacial Maximum. However, the long-term history of desertification in this area and its mechanisms are still unknown due to lack of long-term and well-dated records. Here we present the results of sand particle content (a proxy of local materials) and detrital-zircon ages from a high-resolved loess-paleosol section spanning the past 420 ka in the Menyuan (MY) Basin lying in the NETP. Our results show that the provenance of loess units (formed in glacial periods) was strongly influenced by local desertified materials that were mainly produced by alpine glaciers surrounding the basin, which was significantly different from the paleosol units (formed in interglacial periods). The strong signals of-100 kyr and -20 kyr cycles in the content of local materials suggest that the desertification of the MY Basin was controlled by both the late Quaternary-100-kyr ice age and the -20-kyr precession cycles, which is obviously different from the periodicities of the classic Luochuan loess section in the mainland of the Chinese Loess Plateau (CLP). The strong -20-kyr cycle in the MY Basin suggest that the alpine glaciation activities in the NETP were driven by local summer insolation. These results allow us to characterize the long-term natural variability of desertification in the NETP, as well as the mechanisms for the spatial and glacial-interglacial variations of loess provenance on the CLP.
英文关键词	NE Tibetan Plateau Quaternary Loess Detrital -zircon ages Orbital cycles Desertification
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001012407500001
WOS关键词	AEOLIAN SEDIMENTS ; ASIAN MONSOON ; DUST SOURCES ; CHINA ; PROVENANCE ; NORTH ; AGE ; VARIABILITY ; ENVIRONMENT ; EVOLUTION
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/396764
推荐引用方式 GB/T 7714	Xiao, Guoqiao,Dai, Gaowen,Tian, Shaohua,et al. Periodic variations of alpine glaciation and desertification of the NE Tibetan Plateau: Evidence from the loess-paleosol sequences in the Menyuan Basin[J],2023,226.
APA	Xiao, Guoqiao.,Dai, Gaowen.,Tian, Shaohua.,Peng, Shuzhen.,Li, Liting.,...&Yin, Qiuzhen.(2023).Periodic variations of alpine glaciation and desertification of the NE Tibetan Plateau: Evidence from the loess-paleosol sequences in the Menyuan Basin.GLOBAL AND PLANETARY CHANGE,226.
MLA	Xiao, Guoqiao,et al."Periodic variations of alpine glaciation and desertification of the NE Tibetan Plateau: Evidence from the loess-paleosol sequences in the Menyuan Basin".GLOBAL AND PLANETARY CHANGE 226(2023).