气候变化领域集成服务门户(CCPortal): Climatic significance of tree-ring delta O-18 in the Qilian Mountains, northwestern China and its relationship to atmospheric circulation patterns

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DOI	10.1016/j.chemgeo.2009.08.005
	Climatic significance of tree-ring delta O-18 in the Qilian Mountains, northwestern China and its relationship to atmospheric circulation patterns
	Liu, Xiaohong; Shao, Xuemei; Liang, Eryuan; Chen, Tuo; Qin, Dahe; An, Wenling; Xu, Guobao; Sun, Weizhen; Wang, Yu
发表日期	2009
ISSN	0009-2541
起始页码	147
结束页码	154
卷号	268 期号:1-2
英文摘要	It is important to understand the history and dynamics of climate in a transitional region between areas with different atmospheric circulation patterns, where the vegetation and ecosystems are vulnerable to environmental change. We investigated variations in the long-term oxygen isotope composition (delta O-18) in tree rings of Qinghai spruce (Picea crassifolia) and their relationships to climatic parameters in the and Qilian Mountains of northwestern China from 1870 to 2006. We found that the mean temperature from the previous November to the current February was significantly and positively correlated with the tree-ring delta O-18 values. The temperature effect, (the positive relationship between the temperature and the precipitation delta O-18 value) can explain the connection between temperature and the tree-ring delta O-18 values. Due to pooling of the earlywood and latewood into yearly tree-ring samples, it appears that the cellulose delta O-18 may be influenced by isotopically nonhomogeneous water sources and climatic conditions during the previous and current growing seasons. Subtle shifts and amplitude deviations in cellulose delta O-18 which abruptly became more positive around 1977-1978, may be attributed to the shifting climatic regime in China and to temperature variations, respectively. Our results illustrated the potential for investigating climatic or atmospheric circulation patterns based on oxygen isotope records in tree rings in regions near the interface between different large-scale synoptic circulations. (C) 2009 Elsevier B.V. All rights reserved.
英文关键词	Oxygen isotopes; Tree rings; Temperature effects; Atmospheric circulation patterns
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
来源期刊	CHEMICAL GEOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158664
作者单位	Liu, XH (corresponding author), Chinese Acad Sci, State Key Lab Cryospher Sci Cold & Arid Reg, Environm & Engn Res Inst, Donggang W Rd 320, Lanzhou 730000, Peoples R China.
推荐引用方式 GB/T 7714	Liu, Xiaohong,Shao, Xuemei,Liang, Eryuan,et al. Climatic significance of tree-ring delta O-18 in the Qilian Mountains, northwestern China and its relationship to atmospheric circulation patterns[J],2009,268(1-2).
APA	Liu, Xiaohong.,Shao, Xuemei.,Liang, Eryuan.,Chen, Tuo.,Qin, Dahe.,...&Wang, Yu.(2009).Climatic significance of tree-ring delta O-18 in the Qilian Mountains, northwestern China and its relationship to atmospheric circulation patterns.CHEMICAL GEOLOGY,268(1-2).
MLA	Liu, Xiaohong,et al."Climatic significance of tree-ring delta O-18 in the Qilian Mountains, northwestern China and its relationship to atmospheric circulation patterns".CHEMICAL GEOLOGY 268.1-2(2009).