气候变化领域集成服务门户(CCPortal): Standardization of Qilian juniper ring-width series in the eastern margin of the Qaidam Basin

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DOI	10.1007/s11442-007-0175-x
	Standardization of Qilian juniper ring-width series in the eastern margin of the Qaidam Basin
	Xu Yan; Shao Xuemei
发表日期	2007
ISSN	1009-637X
EISSN	1861-9568
起始页码	175
结束页码	186
卷号	17 期号:2
英文摘要	Standardization is one of the important procedures in dendroclimatology. We used abundant Qilian juniper (Sabina przewalskii Kom.) tree-ring samples from the eastern margin of the Qaidam Basin to develop a new standardization method, i.e. total growth curve (TGC). The samples that contained the complete pith and reached to the growing culmination around the 40th-60th year were used to fit TGC, and the generalized negative exponential function was used to fit the curve. Usually, most cores cannot reach the arboreal pith for some reasons and it is difficult to determine the arboreal cambial age. The empirical model of initial radial growth (IRG) was employed to estimate the number of rings missing from the pith by the same data and IRG model explained 90.9% of the variance. When developing the chronology, the cambial ages of cores that contained the complete pith were regarded as beginning from the first year and others were determined by the numbers of missing and included rings in the core. Standardization was accomplished by dividing each tree-ring series by corresponding TGC. The chronologies developed by TGC can retain more low-frequency variational information and TGC helps to develop more reliable tree-ring width chronology.
关键词	TREE-RING TEMPERATURE PRECIPITATION RECONSTRUCTION RECORD
英文关键词	the Qaidam Basin; Qilian juniper; tree-ring width; growth trend
语种	英语
WOS研究方向	Physical Geography
WOS类目	Geography, Physical
WOS记录号	WOS:000254941600005
来源期刊	JOURNAL OF GEOGRAPHICAL SCIENCES
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257455
推荐引用方式 GB/T 7714	Xu Yan,Shao Xuemei. Standardization of Qilian juniper ring-width series in the eastern margin of the Qaidam Basin[J]. 中国科学院青藏高原研究所,2007,17(2).
APA	Xu Yan,&Shao Xuemei.(2007).Standardization of Qilian juniper ring-width series in the eastern margin of the Qaidam Basin.JOURNAL OF GEOGRAPHICAL SCIENCES,17(2).
MLA	Xu Yan,et al."Standardization of Qilian juniper ring-width series in the eastern margin of the Qaidam Basin".JOURNAL OF GEOGRAPHICAL SCIENCES 17.2(2007).