development, evaluation, and application of a bgc ...lm… · exchange sorption leaf litter o, n20,...
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Accumulation in multiple phases
Diffusion
Advection
Chemical and biogeochemical reactions
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Accumulation in three phases
Diffusion
Advection
Chemical and biogeochemical reactions
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Accumulation in three phases
Diffusion
Advection
Chemical and biogeochemical reactions
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Accumulation in three phases
Diffusion
Advection
Chemical and biogeochemical reactions
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• Upstream discretization (Tremback et al. 1987) • Transpiration fluxes • Horizontal fluxes with surface runoff: assume in equilibrium with top 2 soil
layers
• Comparable to aerosols for accumulation and melt (Oleson et al. 2010) • Allows tracer movement through advection and diffusion; fast equilibration
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FSR = Surface CO2 Flux SR = Subsurface CO2 Production
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C14 surface flux vs C14 respiration
CO2 flux vs soil respiration
Radio-carbon simulation in CLM4-BeTR
Development, Evaluation, and Application of a BGC Transport and Reaction Capability for CLM4.5 (CLM4-BeTR)OutlineMotivationModel Structure and ImplementationModel Structure and ImplementationModel Structure and ImplementationModel Structure and ImplementationModel Structure and ImplementationModel Structure and ImplementationModel TestingHarvard Forest SimulationsHarvard Forest SimulationsSoil-Gas CO2Slide Number 14Slide Number 15Slide Number 16Belowground Flux PartitioningUsing 14C to Characterize CO2 SourcesUsing 14C to Characterize CO2 SourcesSummary, Etc.Slide Number 21Slide Number 22Slide Number 23
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