Accumulation in multiple phases
Diffusion
Advection
Chemical and biogeochemical reactions
Accumulation in three phases
Diffusion
Advection
Chemical and biogeochemical reactions
Accumulation in three phases
Diffusion
Advection
Chemical and biogeochemical reactions
Accumulation in three phases
Diffusion
Advection
Chemical and biogeochemical reactions
• 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
FSR = Surface CO2 Flux SR = Subsurface CO2 Production
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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