Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14395 |
Disentangling seasonal and interannual legacies from inferred patterns of forest water and carbon cycling using tree-ring stable isotopes | |
Szejner, Paul1; Wright, William E.1; Belmecheri, Soumaya1; Meko, David1; Leavitt, Steven W.1; Ehleringer, James R.2; Monson, Russell K.1,3 | |
2018-11-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2018 |
卷号 | 24期号:11页码:5332-5347 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Tree-ring carbon and oxygen isotope ratios have been used to understand past dynamics in forest carbon and water cycling. Recently, this has been possible for different parts of single growing seasons by isolating anatomical sections within individual annual rings. Uncertainties in this approach are associated with correlated climate legacies that can occur at a higher frequency, such as across successive seasons, or a lower frequency, such as across years. The objective of this study was to gain insight into how legacies affect cross-correlation in the C-13 and O-18 isotope ratios in the earlywood (EW) and latewood (LW) fractions of Pinus ponderosa trees at thirteen sites across a latitudinal gradient influenced by the North American Monsoon (NAM) climate system. We observed that C-13 from EW and LW has significant positive cross-correlations at most sites, whereas EW and LW O-18 values were cross-correlated at about half the sites. Using combined statistical and mechanistic models, we show that cross-correlations in both C-13 and O-18 can be largely explained by a low-frequency (multiple-year) mode that may be associated with long-term climate change. We isolated, and statistically removed, the low-frequency correlation, which resulted in greater geographical differentiation of the EW and LW isotope signals. The remaining higher-frequency (seasonal) cross-correlations between EW and LW isotope ratios were explored using a mechanistic isotope fractionation-climate model. This showed that lower atmospheric vapor pressure deficits associated with monsoon rain increase the EW-LW differentiation for both C-13 and O-18 at southern sites, compared to northern sites. Our results support the hypothesis that dominantly unimodal precipitation regimes, such as near the northern boundary of the NAM, are more likely to foster cross-correlations in the isotope signals of EW and LW, potentially due to greater sharing of common carbohydrate and soil water resource pools, compared to southerly sites with bimodal precipitation regimes. |
英文关键词 | cross-correlation drought high-resolution North American Monsoon paleoclimatology precipitation stable isotopes vapor pressure deficit |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000447760300027 |
WOS关键词 | NORTH-AMERICAN MONSOON ; LEAF WATER ; UNITED-STATES ; C-13/C-12 VARIATIONS ; CLIMATE VARIABILITY ; SUMMER RAINFALL ; OXYGEN ISOTOPES ; ATMOSPHERIC CO2 ; PRECIPITATION ; DROUGHT |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/17400 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Arizona, Tree Ring Res Lab, 1215 E Lowell St, Tucson, AZ 85721 USA; 2.Univ Utah, Dept Biol, Stable Isotope Ratio Facil Environm Res, Salt Lake City, UT 84112 USA; 3.Univ Arizona, Dept Ecol & Evolutionary Biol, Tucson, AZ USA |
推荐引用方式 GB/T 7714 | Szejner, Paul,Wright, William E.,Belmecheri, Soumaya,et al. Disentangling seasonal and interannual legacies from inferred patterns of forest water and carbon cycling using tree-ring stable isotopes[J]. GLOBAL CHANGE BIOLOGY,2018,24(11):5332-5347. |
APA | Szejner, Paul.,Wright, William E..,Belmecheri, Soumaya.,Meko, David.,Leavitt, Steven W..,...&Monson, Russell K..(2018).Disentangling seasonal and interannual legacies from inferred patterns of forest water and carbon cycling using tree-ring stable isotopes.GLOBAL CHANGE BIOLOGY,24(11),5332-5347. |
MLA | Szejner, Paul,et al."Disentangling seasonal and interannual legacies from inferred patterns of forest water and carbon cycling using tree-ring stable isotopes".GLOBAL CHANGE BIOLOGY 24.11(2018):5332-5347. |
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