DOI: 10.1002/2013GB004655
Scopus记录号: 2-s2.0-85027935866
论文题名: Sensitivity of global terrestrial carbon cycle dynamics to variability in satellite-observed burned area
作者: Poulter B ; , Cadule P ; , Cheiney A ; , Ciais P ; , Hodson E ; , Peylin P ; , Plummer S ; , Spessa A ; , Saatchi S ; , Yue C ; , Zimmermann N ; E
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2015
卷: 29, 期: 2 起始页码: 207
结束页码: 222
语种: 英语
英文关键词: biomass
; dynamic global vegetation model
; fire
; plant functional type
; remote sensing
; transport model
Scopus关键词: biomass
; biome
; carbon cycle
; emission control
; forest fire
; heterotrophy
; MODIS
; parameterization
; regional pattern
; satellite imagery
; simulation
; terrestrial environment
; uncertainty analysis
英文摘要: Fire plays an important role in terrestrial ecosystems by regulating biogeochemistry, biogeography, and energy budgets, yet despite the importance of fire as an integral ecosystem process, significant advances remain to improve its prognostic representation in carbon cycle models. To recommend and to help prioritize model improvements, this study investigates the sensitivity of a coupled global biogeography and biogeochemistry model, LPJ, to observed burned area measured by three independent satellite-derived products, GFED v3.1, L3JRC, and GlobCarbon. Model variables are compared with benchmarks that include pantropical aboveground biomass, global tree cover, and CO2 and CO trace gas concentrations. Depending on prescribed burned area product, global aboveground carbon stocks varied by 300 Pg C, and woody cover ranged from 50 to 73 Mkm2. Tree cover and biomass were both reduced linearly with increasing burned area, i.e., at regional scales, a 10% reduction in tree cover per 1000 km2, and 0.04-to-0.40 Mg C reduction per 1000 km2. In boreal regions, satellite burned area improved simulated tree cover and biomass distributions, but in savanna regions, model-data correlations decreased. Global net biome production was relatively insensitive to burned area, and the long-term land carbon sink was robust, ∼2.5 Pg C yr-1, suggesting that feedbacks from ecosystem respiration compensated for reductions in fuel consumption via fire. CO2 transport provided further evidence that heterotrophic respiration compensated any emission reductions in the absence of fire, with minor differences in modeled CO2 fluxes among burned area products. CO was a more sensitive indicator for evaluating fire emissions, with MODIS-GFED burned area producing CO concentrations largely in agreement with independent observations in high latitudes. This study illustrates how ensembles of burned area data sets can be used to diagnose model structures and parameters for further improvement and also highlights the importance in considering uncertainties and variability in observed burned area data products for model applications. ©2015. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78016
Appears in Collections: 气候变化事实与影响
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作者单位: Institute on Ecosystems, Department of Ecology, Montana State University, Bozeman, MT, United States; Laboratoire des Sciences du Climat et de l'Environnement, LSCE CEA CNRS UVSQ, Gif Sur Yvette, France; Dynamic Macroecology, Swiss Federal Research Institute WSL, Birmensdorf, Switzerland; ESA Climate Office, European Space Agency - Harwell, Oxfordshire, United Kingdom; Department of Environment, Earth and Ecosystems, Open University, Milton Keynes, United Kingdom; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States
Recommended Citation:
Poulter B,, Cadule P,, Cheiney A,et al. Sensitivity of global terrestrial carbon cycle dynamics to variability in satellite-observed burned area[J]. Global Biogeochemical Cycles,2015-01-01,29(2)