干旱区生态环境知识资源中心(Arid): Late Quaternary Dust, Loess and Desert Dynamics in Upwind Areas of the Chinese Loess Plateau

Arid

DOI	10.3389/feart.2021.661874
	Late Quaternary Dust, Loess and Desert Dynamics in Upwind Areas of the Chinese Loess Plateau
	Qiang, Mingrui; Stevens, Thomas; Li, Guoqiang; Hu, Ling; Wang, Xiaowei; Lang, Wenzhe; Chen, Jie
通讯作者	Qiang, MR (corresponding author), South China Normal Univ, Sch Geog, Guangzhou, Peoples R China. ; Qiang, MR (corresponding author), Lanzhou Univ, MOE Key Lab Western Chinas Environm Syst, Lanzhou, Peoples R China.
来源期刊	FRONTIERS IN EARTH SCIENCE
EISSN	2296-6463
出版年	2021
卷号	9
英文摘要	As a key global climate and dust archive, the nature of Chinese loess generation, transport and deposition remains debated. The lack of consensus on dust dynamics from sources to leeward regions fundamentally limits interpretation of the preserved past climate and dust record. Here, we investigate chronostratigraphic variability of aeolian deposits in upwind regions of the modern Chinese Loess Plateau (CLP) and attempt to understand dust dynamics that potentially affects loess deposition downwind. The strata consist of alternating layers of typical loess, well-sorted sand, and sandy loess, with obvious unconformities occurring at the transitions from loess to sand. We suggest that pre-existing typical loess in regions to the northwest of the modern CLP was eroded by wind, providing a significant source of homogeneous dust for the dust deposits downwind. The sand deposits interbedded with typical loess at the study sites suggests that proximal deserts have greatly expanded and contracted repeatedly prior to the Holocene. However, the spatial extents of the deserts, as inferred from the sections here, have not markedly diminished after the major expansion during the Last Glacial Maximum. Such a pattern of proximal desert dynamics plays an important role in regulating dust emission and transport, strongly affecting dust sequences on the CLP. Our results suggest a complex scenario of dust dynamics in upwind regions of the CLP at least over the Late Quaternary; the involved processes have to be considered when using conventional proxies from Chinese loess deposits to recover the history of climate and dust changes.
英文关键词	dust aeolian deposits erosional hiatus proximal desert Chinese loess
类型	Article
语种	英语
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000644699600001
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350278
作者单位	[Qiang, Mingrui; Chen, Jie] South China Normal Univ, Sch Geog, Guangzhou, Peoples R China; [Qiang, Mingrui; Li, Guoqiang; Hu, Ling; Wang, Xiaowei; Lang, Wenzhe] Lanzhou Univ, MOE Key Lab Western Chinas Environm Syst, Lanzhou, Peoples R China; [Stevens, Thomas] Uppsala Univ, Dept Earth Sci, Uppsala, Sweden
推荐引用方式 GB/T 7714	Qiang, Mingrui,Stevens, Thomas,Li, Guoqiang,et al. Late Quaternary Dust, Loess and Desert Dynamics in Upwind Areas of the Chinese Loess Plateau[J]. 兰州大学,2021,9.
APA	Qiang, Mingrui.,Stevens, Thomas.,Li, Guoqiang.,Hu, Ling.,Wang, Xiaowei.,...&Chen, Jie.(2021).Late Quaternary Dust, Loess and Desert Dynamics in Upwind Areas of the Chinese Loess Plateau.FRONTIERS IN EARTH SCIENCE,9.
MLA	Qiang, Mingrui,et al."Late Quaternary Dust, Loess and Desert Dynamics in Upwind Areas of the Chinese Loess Plateau".FRONTIERS IN EARTH SCIENCE 9(2021).