globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.12192
论文题名:
Comparing the performance of different stomatal conductance models using modelled and measured plant carbon isotope ratios (δ13C): Implications for assessing physiological forcing
作者: Bodin P.E.; Gagen M.; McCarroll D.; Loader N.J.; Jalkanen R.; Robertson I.; Switsur V.R.; Waterhouse J.S.; Woodley E.J.; Young G.H.F.; Alton P.B.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2013
卷: 19, 期:6
起始页码: 1709
结束页码: 1719
语种: 英语
英文关键词: Ball-Berry ; Dendrochronology ; Internal conductance ; Land surface model ; SPA model ; Tree-rings
Scopus关键词: carbon ; annual variation ; carbon isotope ; complexity ; dendrochronology ; isotopic ratio ; land surface ; leaf ; physiology ; stem ; stomatal conductance ; tree ring ; article ; comparative study ; Europe ; metabolism ; physiology ; plant physiology ; plant stoma ; theoretical model ; Carbon Isotopes ; Europe ; Models, Theoretical ; Plant Physiological Phenomena ; Plant Stomata ; Europe
英文摘要: Accurate modelling of long-term changes in plant stomatal functioning is vital to global climate change studies because changes in evapotranspiration influence temperature via physiological forcing of the climate. Various stomatal models are included in land surface schemes, but their robustness over longer timescales is difficult to validate. We compare the performance of three stomatal models, varying in their degree of complexity, and coupled to a land surface model. This is carried out by simulating the carbon isotope ratio of tree leaves (δ13Cleaf) over a period of 53 years, and comparing the results with carbon isotope ratios obtained from tree rings (δ13Cstem) measured at six sites in northern Europe. All three stomatal models fail to capture the observed interannual variability in the measured δ13Cstem time series. However, the Soil-Plant-Atmosphere (SPA) model performs significantly better than the Ball-Berry (BB) or COX models when tested for goodness-of-fit against measured δ13Cstem. The δ13Cleaf time series simulated using the SPA model are significantly positively correlated (P < 0.05) with measured results over the full time period tested, at all six sites. The SPA model underestimates interannual variability measured in δ13Cstem, but is no worse than the BB model and significantly better than the COX model. The inability of current models to adequately replicate changes in stomatal response to rising levels of CO2 concentrations, and thus to quantify the associated physiological forcing, warrants further investigation. © 2013 Blackwell Publishing Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62430
Appears in Collections:影响、适应和脆弱性

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作者单位: Department of Physical Geography and Ecosystem Science, Lund University, Sölvegatan 12, S-223 62 Lund, Sweden; Department of Geography, Swansea University, Singleton Park, Swansea, SA2 8PP, United Kingdom; Finnish Forest Research Institute, METLA, PO Box 16 (Eteläranta 55), Rovaniemi, FI- 96301, Finland; Department of Life Sciences, Anglia Ruskin University, East Road, Cambridge, CB1 1PT, United Kingdom; Geography, College of Life and Environmental Sciences, University of Exeter, Rennes Drive, Exeter, EX4 4RJ, United Kingdom

Recommended Citation:
Bodin P.E.,Gagen M.,McCarroll D.,et al. Comparing the performance of different stomatal conductance models using modelled and measured plant carbon isotope ratios (δ13C): Implications for assessing physiological forcing[J]. Global Change Biology,2013-01-01,19(6)
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