干旱区生态环境知识资源中心(Arid): Complex disturbance-driven reactivation of near-surface sediments in the largest dunefield in North America during the last 200 years

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DOI	10.1002/esp.4708
	Complex disturbance-driven reactivation of near-surface sediments in the largest dunefield in North America during the last 200 years
	Buckland, Catherine E.1; Thomas, David S. G.1,2; Bailey, Richard M.1
通讯作者	Buckland, Catherine E.
来源期刊	EARTH SURFACE PROCESSES AND LANDFORMS
ISSN	0197-9337
EISSN	1096-9837
出版年	2019
卷号	44 期号:14 页码:2794-2809
英文摘要	Understanding the historical activity of desert dune systems is important for identifying both the palaeoenvironmental drivers of change and the likelihood of future reactivation. Dating dune sediments in the Nebraska Sandhills has identified regional-scale dune activity over centennial and millennial timescales during the Holocene, occurring at 9.6-6.5, 3.8 and 2.5 ka, and most recently spanning the Medieval Climatic Anomaly 1050-650 years BP. These periods have been interpreted as palaeoclimatic evidence of intense aridity lasting decadal and centennial timescales. A detailed record of dune activity in the historical period, since EuroAmerican arrival, is lacking however, yet important for interpreting the role of human agency amongst the factors influencing disturbance. Without a high-resolution record of short-term, historical, local sediment mobilization, it is not possible to distinguish the environmental factor(s) responsible for local reactivation. In this paper, the individual drivers of vegetation disturbance are reviewed and presented alongside a luminescence-dated reconstruction of dune sediment deposition ages. This allows an integrated assessment of the relationship between drivers and environmental response over a recorded period. We focused our investigation on the aeolian reactivations of surface dune sediments and blowout features around the Niobrara Valley Preserve in the northern limits of the Nebraska Sandhills. Results show a near-continuous (within uncertainties) timeline of local reactivation across the sites studied, with variation between the individual features indicating that both regional (i.e. climatic) and local (i.e. land use) forcings contribute to surface disturbance. (c) 2019 The Authors. Earth Surface Processes and Landforms published by John Wiley & Sons Ltd.
英文关键词	Nebraska Sandhills dunefield disturbance deposition OSL grazing
类型	Article
语种	英语
国家	England ; South Africa
开放获取类型	hybrid, Green Published
收录类别	SCI-E
WOS记录号	WOS:000484163400001
WOS关键词	NEBRASKA SAND HILLS ; HOLOCENE DUNE ACTIVITY ; CENTRAL GREAT-PLAINS ; DOSE-RATE ; SOUTHWESTERN KALAHARI ; RAINFALL VARIABILITY ; GEOCHEMICAL EVIDENCE ; LUMINESCENCE ; CLIMATE ; FIRE
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
来源机构	University of Oxford
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215096
作者单位	1.Univ Oxford, Sch Geog & Environm, Oxford OX1 3QY, England; 2.Univ Witwatersrand, Geog Archaeol & Environm Studies, Johannesburg, South Africa
推荐引用方式 GB/T 7714	Buckland, Catherine E.,Thomas, David S. G.,Bailey, Richard M.. Complex disturbance-driven reactivation of near-surface sediments in the largest dunefield in North America during the last 200 years[J]. University of Oxford,2019,44(14):2794-2809.
APA	Buckland, Catherine E.,Thomas, David S. G.,&Bailey, Richard M..(2019).Complex disturbance-driven reactivation of near-surface sediments in the largest dunefield in North America during the last 200 years.EARTH SURFACE PROCESSES AND LANDFORMS,44(14),2794-2809.
MLA	Buckland, Catherine E.,et al."Complex disturbance-driven reactivation of near-surface sediments in the largest dunefield in North America during the last 200 years".EARTH SURFACE PROCESSES AND LANDFORMS 44.14(2019):2794-2809.