DOI: 10.1029/2018GB005925
论文题名: Inverse Determination of the Influence of Fire on Vegetation Carbon Turnover in the Pantropics
作者: Exbrayat J.-F. ; Smallman T.L. ; Bloom A.A. ; Hutley L.B. ; Williams M.
刊名: Global Biogeochemical Cycles
ISSN: 0886-6236
EISSN: 1944-9224
出版年: 2018
卷: 32, 期: 12 语种: 英语
英文关键词: Bayesian analysis
; carbon
; carbon cycle
; climate change
; data assimilation
; fire
; inverse analysis
; sensitivity analysis
; spatial distribution
; terrestrial environment
; tropical region
; turnover
; vegetation
学科: fire
; inverse modeling
; model-data fusion
; sensitivity
; terrestrial carbon cycle
; tropics
中文摘要: Fire is a major component of the terrestrial carbon cycle that has been implemented in most current global terrestrial ecosystem models. Here we use terrestrial carbon cycle observations to characterize the importance of fire regime gradients in the spatial distribution of ecosystem functional properties such as carbon allocation, fluxes, and turnover times in the tropics. A Bayesian model-data fusion approach is applied to an ecosystem carbon model to derive the posterior distribution of corresponding parameters for the tropics from 2000 to 2015. We perform the model-data fusion procedure twice, that is, with and without imposing fire. Gradient of differences in model parameters and ecosystem properties in response to fire emerge between these experiments. For example, mean annual burned fraction correlates with an increase in carbon use efficiency and reductions in carbon turnover times. Further, our analyses reveal an increased allocation to more fire-resistant tissues in the most frequently burned regions. As fire modules are increasingly implemented in global terrestrial ecosystem models, we recommend that model development includes a representation of the impact of fire on ecosystem properties as they may lead to large differences under climate change projections. ©2018. 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/160173
Appears in Collections: 气候变化与战略
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作者单位: National Centre for Earth Observation and School of GeoSciences, University of Edinburgh, Edinburgh, United Kingdom; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Research Institute for the Environment and Livelihoods, Charles Darwin University, Darwin, NT, Australia
Recommended Citation:
Exbrayat J.-F.,Smallman T.L.,Bloom A.A.,et al. Inverse Determination of the Influence of Fire on Vegetation Carbon Turnover in the Pantropics[J]. Global Biogeochemical Cycles,2018-01-01,32(12)