气候变化领域集成服务门户(CCPortal): Response and dendroclimatic implications of delta C-13 in tree rings to increasing drought on the northeastern Tibetan Plateau

CCPortal

DOI	10.1029/2007JG000610
	Response and dendroclimatic implications of delta C-13 in tree rings to increasing drought on the northeastern Tibetan Plateau
	Liu, Xiaohong; Shao, Xuemei; Wang, Lily; Liang, Eryuan; Qin, Dahe; Ren, Jiawen
发表日期	2008
ISSN	2169-8953
卷号	113 期号:G3
英文摘要	The stable carbon isotope composition (delta C-13) of tree rings in a climate-sensitive region can provide a retrospective view of changes in environment and climate. Here, we report on the development of the first annually resolved delta C-13 tree ring chronology obtained from natural forests on the northeastern Tibetan Plateau. Climate data show a warming trend and more frequent droughts occurring in the research region since the 1970s. The isotope record of Qinghai spruce (Picea crassifolia) spans the period 1890-2002 with a general decreasing trend over the last century followed by an abrupt increase in delta C-13 over the last decade. The stable carbon discrimination against heavier atmospheric carbon (Delta C-13) is negatively correlated to May temperature and positively correlated with June-July precipitation. The regional Palmer drought severity index (PDSI) correlated significantly with Delta C-13 series after 1960, whereas this relationship was not stable over the period 1933-1960. However, much stronger correlations were observed between the high-frequency anomalies in annual Delta C-13 and PDSI in June and July during the period 1933-2002. The temporal stability analysis revealed trends in the response to drought stress affecting tree's Delta C-13 linked to climatic warming. Intrinsic water-use efficiency increased by 7.7% in Qinghai spruce in response to increased severity of regional drought during the 1990s compared to the average of the previous decade. Our preliminary results suggest that carbon isotope in certain tree taxa growing on Tibetan Plateau may be an effective proxy for reconstructing regional drought.
WOS研究方向	Environmental Sciences & Ecology ; Geology
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158678
作者单位	Liu, XH (corresponding author), Chinese Acad Sci, Cold & Arid Regions Environm & Engn Res Inst, State Key Lab Cryospher Sci, Donggang W Rd 320, Lanzhou 730000, Peoples R China.
推荐引用方式 GB/T 7714	Liu, Xiaohong,Shao, Xuemei,Wang, Lily,et al. Response and dendroclimatic implications of delta C-13 in tree rings to increasing drought on the northeastern Tibetan Plateau[J],2008,113(G3).
APA	Liu, Xiaohong,Shao, Xuemei,Wang, Lily,Liang, Eryuan,Qin, Dahe,&Ren, Jiawen.(2008).Response and dendroclimatic implications of delta C-13 in tree rings to increasing drought on the northeastern Tibetan Plateau.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,113(G3).
MLA	Liu, Xiaohong,et al."Response and dendroclimatic implications of delta C-13 in tree rings to increasing drought on the northeastern Tibetan Plateau".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 113.G3(2008).