DOI: 10.5194/cp-12-2229-2016
Scopus记录号: 2-s2.0-85006967879
论文题名: Quantitative reconstruction of summer precipitation using a mid-Holocene δ13C common millet record from Guanzhong Basin, northern China
作者: Yang Q. ; Li X. ; Zhou X. ; Zhao K. ; Sun N.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2016
卷: 12, 期: 12 起始页码: 2229
结束页码: 2240
语种: 英语
Scopus关键词: Panicum miliaceum
英文摘要: To quantitatively reconstruct Holocene precipitation for particular geographical areas, suitable proxies and faithful dating controls are required. The fossilized seeds of common millet (Panicum miliaceum) are found throughout the sedimentary strata of northern China and are suited to the production of quantitative Holocene precipitation reconstructions: their isotopic carbon composition (δ13C) gives a measure of the precipitation required during the growing season of summer (here the interval from mid-June to September) and allows these seeds to be dated. We therefore used a regression function, as part of a systematic study of the δ13C of common millet, to produce a quantitative reconstruction of mid-Holocene summer precipitation in the Guanzhong Basin (107°40′-107°49 E, 33°39′-34°45 N). Our results showed that mean summer precipitation at 7.7-3.4ka BP was 353 mm, ∼ 50 mm or 17% higher than present levels, and the variability increased, especially after 5.2 ka BP. Maximum mean summer precipitation peaked at 414 mm during the period 6.1-5.5 ka BP, ∼ 109 mm (or 36%) higher than today, indicating that the East Asian summer monsoon (EASM) peaked at this time. This work can provide a new proxy for further research into continuous paleoprecipitation sequences and the variability of summer precipitation, which will promote the further research into the relation between early human activity and environmental change. © 2016 Author(s). 资助项目: NSFC, National Natural Science Foundation of China
; NSFC, National Natural Science Foundation of China
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/48952
Appears in Collections: 气候变化与战略
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Recommended Citation:
Yang Q.,Li X.,Zhou X.,et al. Quantitative reconstruction of summer precipitation using a mid-Holocene δ13C common millet record from Guanzhong Basin, northern China[J]. Climate of the Past,2016-01-01,12(12)