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DOI	10.5194/cp-15-367-2019
	The 4.2 ka BP Event in northeastern China: A geospatial perspective
	Scuderi L.A.; Yang X.; Ascoli S.E.; Li H.
发表日期	2019
ISSN	18149324
起始页码	367
结束页码	375
卷号	15 期号:1
英文摘要	The Hunshandake Sandy Lands of northeastern China, currently a semiarid lightly vegetated region, were characterized by perennial lakes and forest stands in the early and middle Holocene. Well-developed dark grassland-type paleosols (mollisols) at the southern edge of the Hunshandake-OSL (optically stimulated luminescence)-dated to between 6.93±0.61< and 4.27±0.38< ka along with lacustrine sands at higher elevations that date to between 5.7±0.3< and 5.2±0.2< ka-and thick gray lacustrine sediments suggest a wetter climate. Between 4.2 and 3.8 ka, the region experienced extreme drying that was exacerbated by lake overflow drainage and sapping that depleted the groundwater table. The region supported a robust population, the Hongshan Culture, but was depopulated post 4.2 ka with migration likely to the Yellow River Valley where the Hongshan introduced their characteristic cultural elements to early Chinese civilization. Evidence for extreme and sudden environmental change in northeastern China, at and following the 4.2 ka BP Event and like that we document in the Hunshandake, is widespread. However, no comprehensive overview of this climatic episode exists. Here, we discuss the relevant events in northeastern China and capture them in a spatially explicit Geographic Information Systems database that can be used to analyze the timing and spatial pattern of climate and environmental change associated with the 4.2 ka BP Event. This approach could serve as a prototype for a global 4.2 ka BP Event database. © 2019 Author(s).
语种	英语
scopus关键词	climate change; environmental change; groundwater; Holocene; lacustrine deposit; paleosol; semiarid region; water table; China; Hunshandak Sandland; Nei Monggol; Yellow River Valley
来源期刊	Climate of the Past
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146849
作者单位	Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM, United States; School of Earth Sciences, Zhejiang University, Hangzhou, Zhejiang Province, China
推荐引用方式 GB/T 7714	Scuderi L.A.,Yang X.,Ascoli S.E.,et al. The 4.2 ka BP Event in northeastern China: A geospatial perspective[J],2019,15(1).
APA	Scuderi L.A.,Yang X.,Ascoli S.E.,&Li H..(2019).The 4.2 ka BP Event in northeastern China: A geospatial perspective.Climate of the Past,15(1).
MLA	Scuderi L.A.,et al."The 4.2 ka BP Event in northeastern China: A geospatial perspective".Climate of the Past 15.1(2019).