globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2017.08.024
Scopus记录号: 2-s2.0-85029057249
论文题名:
Holocene moisture variations over the arid central Asia revealed by a comprehensive sand-dune record from the central Tian Shan, NW China
作者: Long H.; Shen J.; Chen J.; Tsukamoto S.; Yang L.; Cheng H.; Frechen M.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 174
起始页码: 13
结束页码: 32
语种: 英语
英文关键词: Holocene moisture variation ; NW China ; OSL dating ; Sand dunes ; Westerlies
Scopus关键词: Atmospheric thermodynamics ; Magnetic susceptibility ; Moisture ; Sand ; Stratigraphy ; Moisture variation ; NW China ; OSL dating ; Sand dunes ; Westerlies ; Landforms
英文摘要: Arid central Asia (ACA) is one of the largest arid (desert) areas in the world, and its climate is dominated by the westerlies. In this study, we examined sand dune evolution from the Bayanbulak Basin in the Tian Shan (Xinjiang, NW China), aiming to infer the Holocene moisture history of the ACA. Combined with stratigraphic observation and environmental proxies analysis (grain size, magnetic susceptibility and total organic content), large numbers of luminescence ages from multiple sites (eight sections, 79 samples) were applied to reconstruct the evolution of the sand dune accumulation in the study basin. The overall results imply very dry conditions characterized by sand dune accumulation at ∼12–6.5 ka, a wet interval between ∼6.5 and 0.8 ka when soil formation occurred, and decreased moisture during the last 0.8 ka. This moisture variation pattern is generally consistent with that inferred from many lacustrine records in the core zone of ACA, suggesting a widespread dry period in the early-to-middle Holocene and relatively wet middle-to-late Holocene. Thus, the moisture history derived from the current sand dune system contrasts with that in Asian monsoon areas, which are characterized by a strong monsoon (high precipitation) in the early and mid-Holocene and a weak monsoon (low precipitation and dry climate) during the late Holocene. Our results strongly suggest that the winter solar insolation and the external boundary conditions such as atmospheric CO2 concentration, ice sheets, and meltwater fluxes, have been major influential factors triggering the Holocene moisture evolution in the core zone of ACA. © 2017 Elsevier Ltd
资助项目: HL thanks the Youth Innovation Promotion Association CAS (China) and the Alexander von Humboldt Foundation (Germany) for research fellowships. Lei Gao and Yujing Feng are thanked for field investigation and sample preparation. We would also like to thank two anonymous reviewers and Prof. Xiaoping Yang for their constructive comments. This research was financially supported by the Program of Global Change and Mitigation (grants no. 2016YFA0600502 and 2017YFA0603402) and the National Natural Science Foundation of China (grants no. 41472144 and 41430530).
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59090
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作者单位: State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences (NIGLAS), Nanjing, China; Leibniz Institute for Applied Geophysics (LIAG), Geochronology and Isotope Hydrology, Hannover, Germany; Key Laboratory of Western China's Environmental Systems, Ministry of Education, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, China; Northwest Institute of Eco-environment and Resources, Chinese Academy of Sciences, Lanzhou, China

Recommended Citation:
Long H.,Shen J.,Chen J.,et al. Holocene moisture variations over the arid central Asia revealed by a comprehensive sand-dune record from the central Tian Shan, NW China[J]. Quaternary Science Reviews,2017-01-01,174
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