气候变化领域集成服务门户(CCPortal): Reconstruction of a 1436-year soil moisture and vegetation water use history based on tree-ring widths from Qilian junipers in northeastern Qaidam Basin, northwestern China

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DOI	10.1002/joc.1515
	Reconstruction of a 1436-year soil moisture and vegetation water use history based on tree-ring widths from Qilian junipers in northeastern Qaidam Basin, northwestern China
	Yin, Zhi-Yong; Shao, Xuemei; Qin, Ningsheng; Liang, Eryuan
通讯作者	Yin, ZY (通讯作者)
发表日期	2008
ISSN	0899-8418
EISSN	1097-0088
起始页码	37
结束页码	53
卷号	28 期号:1
英文摘要	Tree-ring widths have been used widely in studies of environmental changes and reconstructions of past climate. Eleven tree-ring chronologies of approximately 800-1500 years long were developed from Qilian junipers (Sabina przewalskii Kom.) for northeastern Qaidam Basin, along the margin of the Qinghai-Tibetan Plateau. Previous studies have revealed that water usage stress is the most limiting factor for tree growth in the study region. To evaluate the impact of the combined effects of temperature and precipitation changes over time, we performed water balance modelling using 1955-2002 meteorological data. We found that the tree-ring widths were strongly correlated with variables representing soil moisture conditions obtained from the water balance model. Specifically we considered actual evapotranspiration (AE) to represent the combined effect of water use demand and moisture availability, deficit as the difference between potential evapotranspiration (PE) and AE to represent the severity of water use stress, and relative soil moisture as the measure of moisture availability. For certain individual monthly and seasonal combinations, the tree-ring chronologies explained up to 80% of the variation in the soil moisture variables in regression analysis, indicating very good potential for reconstruction of regional soil moisture conditions in the past. These soil moisture variables outperformed precipitation and Palmer's drought severity index in most cases. We reconstructed the soil moisture conditions from 566 AD to 2001, which revealed major dry and wet periods and a general trend toward a wetter condition during the most recent 300 years. By comparing with other proxies in the region, we concluded that the moisture conditions reconstructed from tree-ring widths very well reflected the climate variability at the interannual and interdecadal scales. Copyright (C) 2007 Royal Meteorological Society.
关键词	UNITED-STATES CLIMATE PRECIPITATION DROUGHT GROWTH 20TH-CENTURY DEGRADATION MOUNTAINS PATTERNS FOREST
英文关键词	dendroclimatology; water balance modelling; reconstruction of soil moisture condition
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000252574900003
来源期刊	INTERNATIONAL JOURNAL OF CLIMATOLOGY
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/257573
推荐引用方式 GB/T 7714	Yin, Zhi-Yong,Shao, Xuemei,Qin, Ningsheng,et al. Reconstruction of a 1436-year soil moisture and vegetation water use history based on tree-ring widths from Qilian junipers in northeastern Qaidam Basin, northwestern China[J]. 中国科学院青藏高原研究所,2008,28(1).
APA	Yin, Zhi-Yong,Shao, Xuemei,Qin, Ningsheng,&Liang, Eryuan.(2008).Reconstruction of a 1436-year soil moisture and vegetation water use history based on tree-ring widths from Qilian junipers in northeastern Qaidam Basin, northwestern China.INTERNATIONAL JOURNAL OF CLIMATOLOGY,28(1).
MLA	Yin, Zhi-Yong,et al."Reconstruction of a 1436-year soil moisture and vegetation water use history based on tree-ring widths from Qilian junipers in northeastern Qaidam Basin, northwestern China".INTERNATIONAL JOURNAL OF CLIMATOLOGY 28.1(2008).