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DOI	10.1016/j.quascirev.2020.106297
	Vegetation; climate and human impact since 20 ka in central Yunnan Province based on high-resolution pollen and charcoal records from Dianchi; southwestern China
	Xiao X.; Yao A.; Hillman A.; Shen J.; Haberle S.G.
发表日期	2020
ISSN	0277-3791
卷号	236
英文摘要	High-resolution pollen and charcoal records from Dianchi in central Yunnan Province, southwestern China are presented in this study and reveal variations in vegetation, fire, lake environments, and climate over the last 20,000 years (20 ka). The results show that the climate during the period 20.0–18.0 ka was relatively cold, and rainfall in winter and early spring was relatively lower than the present, which belongs to the Last Glacial Maximum (LGM) . After 18.0 ka, the temperature increased gradually, indicating the onset of deglacial warming in central Yunnan Province, though the mean annual temperature before 10.8 ka was still at least 1.5 °C lower than today. The climate began to obviously warm from ∼10.8 ka and was at least 2 °C higher than today and relatively humid between 10.0 and 5.4 ka, denoting the early-Holocene Thermal Maximum. A major vegetation change around Dianchi occurred at ∼5.4 ka and was most likely caused by the climate cooling and drying with no obvious evidence for cultivation activities except for some possible evidence of human fire use or selective deforestation from the pollen assemblage. Significant cultivation activities in Yunnan Province indicated by the first obvious increases in Poaceae (>40 μm) and Poaceae (25–40 μm) pollen percentages began at ∼2.4 ka. In central Yunnan Province, there was a continuous deglacial warming that occurred between 18.0 and 12.5 ka without marked interruption during the interval of Heinrich Event 1 (H1). Additionally, the Holocene Thermal Maximum occurred in the early Holocene. The results from this study are different from the western region of southwestern China where the paleoclimate studies have clearly detected the H1, the B/A, and the YD events, and revealed a mid-Holocene climatic optimum. © 2020 Elsevier Ltd
英文关键词	Climate change; Fire history; Human activity; Pollen record; Southwestern China; Vegetation evolution
语种	英语
scopus关键词	Charcoal; Deforestation; Vegetation; Deglacial warming; Heinrich Events; Holocene thermal maximums; Last Glacial Maximum; Mean annual temperatures; Paleoclimate studies; Pollen assemblage; Vegetation change; Climate change; anthropogenic effect; charcoal; climate effect; cultivation; deforestation; Holocene; Hypsithermal; Last Glacial Maximum; paleoclimate; pollen; vegetation history; China; Dianchi Valley; Yunnan; Poaceae
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151486
作者单位	State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China; Department of Anthropology, University of Chicago, 1126 East 59th Street, Chicago, IL 60637, United States; School of Geosciences, University of Louisiana at Lafayette, 611 McKinley St, Lafayette, LA 70504, United States; Department of Archaeology & Natural History, College of Asia and the Pacific, Australian National University, Australian Capital Territory, Canberra, 0200, Australia
推荐引用方式 GB/T 7714	Xiao X.,Yao A.,Hillman A.,et al. Vegetation; climate and human impact since 20 ka in central Yunnan Province based on high-resolution pollen and charcoal records from Dianchi; southwestern China[J],2020,236.
APA	Xiao X.,Yao A.,Hillman A.,Shen J.,&Haberle S.G..(2020).Vegetation; climate and human impact since 20 ka in central Yunnan Province based on high-resolution pollen and charcoal records from Dianchi; southwestern China.Quaternary Science Reviews,236.
MLA	Xiao X.,et al."Vegetation; climate and human impact since 20 ka in central Yunnan Province based on high-resolution pollen and charcoal records from Dianchi; southwestern China".Quaternary Science Reviews 236(2020).