Recent strengthening of correlations between tree-ring delta C-13 and delta O-18 in mesic western China: Implications to climatic reconstruction and physiological responses (SCI)

CORC > 寒区旱区环境与工程研究所 > 中科院寒区旱区环境与工程研究所（未分类） > 期刊论文

	Recent strengthening of correlations between tree-ring delta C-13 and delta O-18 in mesic western China: Implications to climatic reconstruction and physiological responses (SCI)
	Liu X. H. ; An W. L. ; Leavitt S. W. ; Wang W. Z. ; Xu G. B. ; Zeng X. M. ; Qin D. H.
刊名	Global and Planetary Change
	2014
卷号	113 期号:23-33
英文摘要	We examined the temporal relationships between stable isotopes of carbon (delta C-13) and oxygen (delta O-18) from annual tree-ring cellulose of Abies georgei on the moist Batang-Litang plateau, western China. Climatic response analysis reveals that tree-ring delta C-13 contains a strong moisture signal, and that delta C-13 was especially influenced by relative humidity and precipitation in May through August during the period 1960-2005. In addition, tree-ring delta C-13 and temperature in May to August are positively correlated because of the high-elevation tree growth sites. Drought is also recorded in tree-ring delta C-13, reflecting the integrated influences of temperature and moisture on stomatal regulation and photosynthesis. Generally, correlations between delta C-13 and delta O-18 remained positive, but not significant, in most of the investigated period, and this correlation switched to highly significant from 1969 onwards. Changes in the delta C-13-delta O-18 relationship reflect changes in water stress on carbon isotopic discrimination, suggesting an increase in stomatal control of photosynthesis in recent decades, which is consistent with the overall drying trend in the region. Spatial correlation maps confirm that during the past century the response of tree-ring delta C-13 to temperature and precipitation differs before and after 1969. Using previously reported delta O-18 results and new delta C-13 results on the same samples, we determined that the climatic signal recorded in tree-ring delta O-18 is more stable than that of delta C-13. Analysis of temporal changes in the delta C-13-delta O-18 correlations indicates that dominant processes and the controlling factors on tree-ring delta C-13 potentially shift over the long term under temporal fluctuations of dry-wet spells, especially under recent global warming, and stomatal control of photosynthesis may adjust to region-wide changes in climate in this region where water stress on forest was formerly minor. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.
收录类别	SCI
公开日期	2015-12-24
内容类型	期刊论文
源URL	[http://ir.casnw.net/handle/362004/24949]
专题	寒区旱区环境与工程研究所_中科院寒区旱区环境与工程研究所（未分类）_期刊论文
推荐引用方式 GB/T 7714	Liu X. H.,An W. L.,Leavitt S. W.,et al. Recent strengthening of correlations between tree-ring delta C-13 and delta O-18 in mesic western China: Implications to climatic reconstruction and physiological responses (SCI)[J]. Global and Planetary Change,2014,113(23-33).
APA	Liu X. H..,An W. L..,Leavitt S. W..,Wang W. Z..,Xu G. B..,...&Qin D. H..(2014).Recent strengthening of correlations between tree-ring delta C-13 and delta O-18 in mesic western China: Implications to climatic reconstruction and physiological responses (SCI).Global and Planetary Change,113(23-33).
MLA	Liu X. H.,et al."Recent strengthening of correlations between tree-ring delta C-13 and delta O-18 in mesic western China: Implications to climatic reconstruction and physiological responses (SCI)".Global and Planetary Change 113.23-33(2014).