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Summary:
Final Decomposition Fluxes
The article outlines the calculations for the final decomposition fluxes in the carbon and nitrogen cycling models, specifically the CLM-CN and CENTURY pool structures.
Key Points:
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Final carbon fluxes leaving the individual litter and soil organic matter (SOM) pools are calculated based on the potential carbon fluxes and the immobilization demand factor (
f_immob_demand). -
Heterotrophic respiration fluxes (losses of carbon as CO2 to the atmosphere) are calculated for each pool by multiplying the final carbon flux by the respective respiration fraction.
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Transfers of carbon from upstream to downstream pools in the decomposition cascade are calculated as the final carbon flux minus the heterotrophic respiration flux.
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Nitrogen fluxes between pools are calculated based on the carbon fluxes and the carbon-to-nitrogen ratios of the pools.
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The nitrogen fluxes to or from the soil mineral nitrogen pool depend on whether the decomposition step is an immobilization flux or a mineralization flux.
The equations provided in the article demonstrate the detailed calculations required to model the final decomposition fluxes of carbon and nitrogen in the soil biogeochemical cycling.