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DOI	10.1016/j.palaeo.2020.109954
	Tree-ring δ18O from Southeast China reveals monsoon precipitation and ENSO variability
	Shi S.; Shi J.; Xu C.; Leavitt S.W.; Wright W.E.; Cai Z.; Zhang H.; Sun X.; Zhao Y.; Ma X.; Zhang W.; Lu H.
发表日期	2020
ISSN	0031-0182
卷号	558
英文摘要	Considerable advances have been made in use of tree-ring δ18O for climate reconstructions in Southeast China, the East Asian summer monsoon region. However, the relationships among tree-ring cellulose δ18O (δ18Ocell), local hydroclimate, precipitation δ18O (δ18Opre) and El Niño–Southern Oscillation (ENSO) have not yet been fully resolved. The usual interpretation has been that local hydroclimate influences δ18Ocell through both the “amount effect” on δ18Opre and evaporative enrichment, but it cannot fully explain the high inter-site correlation of δ18Ocell chronologies or their response pattern to ENSO. In this study, we use a newly-developed δ18Ocell chronology of Pinus massoniana from a water-stressed site in Zhejiang province, in combination with another three δ18Ocell chronologies in Southeast China, to investigate their climatic implications from a regional perspective. The results show that besides local hydroclimate, δ18Opre is also significantly correlated with δ18Ocell, but with different effects. Spatially homogeneous δ18Opre variation causes high spatial correlations among δ18Ocell from different sites. Analyses show that ENSO variations are responsible for the large-scale common signals in δ18Ocell by modulating δ18Opre. Therefore, combining δ18Ocell chronologies from different locations can enhance ENSO signals, which provides us new opportunities to reconstruct paleo-ENSO activities. Furthermore, eliminating the part of ENSO signal that is not related to the growing season hydroclimate from δ18Ocell can increase the explained variance of observed values. These findings provide a guide for future optimized ENSO and local paleoclimate reconstructions using δ18Ocell. © 2020 Elsevier B.V.
英文关键词	Dendrochronology; Hydroclimate; Oxygen isotope; Paleoclimate; Precipitation δ18O
语种	英语
scopus关键词	correlation; data interpretation; El Nino-Southern Oscillation; monsoon; oxygen isotope; paleoclimate; precipitation (climatology); reconstruction; spatial analysis; tree ring; Pinus massoniana
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150344
作者单位	School of Geography and Ocean Science, Nanjing University, Nanjing, 210023, China; Laboratory of Tree-Ring Research, University of Arizona, Tucson, 85721, United States; Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China; CAS Center for Excellence in Life and Paleoenvironment, Beijing, 100044, China; Institute of International Rivers and Eco-security, Yunnan University, Kunming, 650500, China; School of Atmospheric Sciences, Nanjing University, Nanjing, 210023, China
推荐引用方式 GB/T 7714	Shi S.,Shi J.,Xu C.,et al. Tree-ring δ18O from Southeast China reveals monsoon precipitation and ENSO variability[J],2020,558.
APA	Shi S..,Shi J..,Xu C..,Leavitt S.W..,Wright W.E..,...&Lu H..(2020).Tree-ring δ18O from Southeast China reveals monsoon precipitation and ENSO variability.Palaeogeography, Palaeoclimatology, Palaeoecology,558.
MLA	Shi S.,et al."Tree-ring δ18O from Southeast China reveals monsoon precipitation and ENSO variability".Palaeogeography, Palaeoclimatology, Palaeoecology 558(2020).