Complementarity of flux- and biometric-based data to constrain parameters in a terrestrial carbon model

ParametersIntervalsUnitDescriptionC ₁ 0.176–2.95mg C g⁻¹ d⁻¹From pool ‘foliage biomass’ (X₁) to pools ‘metabolic litter’ (X₃) and ‘structure litter’ (X₄)C ₂ 0.0548–0.274mg C g⁻¹ d⁻¹From pool ‘woody biomass’ (X₂) to pool ‘structure litter’ (X₄)C ₃ 0.548–2.74mg C g⁻¹ d⁻¹From pool 'metabolic litter’ (X₃) to ‘microbes’ (X₅)C ₄ 0.274–1.37mg C g⁻¹ d⁻¹From pool ‘structure litter’ (X₄) to pools ‘microbes’ (X₅) and ‘slow SOM’ (X₆)C ₅ 2.74–6.85mg C g⁻¹ d⁻¹From pool ‘microbes’ (X₅) to pools ‘slow SOM’ (X₆) and ‘passive SOM’ (X₇)C ₆ 0.0274–0.137mg C g⁻¹ d⁻¹From pool ‘slow SOM’ (X₆) to pools ‘microbes’ (X₅) and ‘passive SOM’ (X₇)C ₇ 0.00137–0.00913mg C g⁻¹ d⁻¹From pool ‘passive SOM’ (X₇) to pool ‘microbes’ (X₅)a _q 0.3–0.5mol mol⁻¹photoCanopy quantum efficiency of photon conversionK²⁵_c50–600umol mol⁻¹Michaelis–Menten constant for carboxylationE_Kc 20 000–100 000J mol⁻¹Activation energy of K²⁵_cE_K0 10 000–60 000J mol⁻¹Activation energy of K²⁵₀K²⁵₀0.2–0.5mol mol⁻¹Michaelis–Menten constant for oxygenationE_Vm 5000–50 000J mol⁻¹Activation energy of V²⁵ _m 10–80umol mol⁻¹CO₂ compensation point without dark respiration$r_{J_m{V}_m}$1–5dimensionlessRation of J _m to V²⁵ _m at 25°CR⁰_eco1–5umol CO₂m⁻²s⁻¹Whole ecosystem respiration at 0°CQ ¹⁰ 1–3dimensionlessTemperature dependency of ecosystem respirationV²⁵ _m 1–20umol CO₂m⁻²s⁻¹Maximum carboxylation rate at 25°Cf_Ci 0.5–0.9dimensionlessRation of internal CO₂ to air CO₂K _n 0.7–0.9dimensionlessCanopy extinction coefficient for light$E_{{\mathrm{\Gamma }}_{*}^{25}}$30 000–100 000J mol⁻¹Activation energy of CO₂ compensation point at 25°Cgl1000–2000dimensionlessEmpirical coefficient in Leuning modelD₀0.5–6kPaEmpirical coefficient in Leuning model