\(\alpha_{\mathrm{g},\mathrm{nir}}^{\mathrm{d}}\) |
ground_diffuse_albedo_nir [Diagnostic: effective ground albedo for diffuse radiation in the near-infrared band, accounting for snow cover]
|
\(\alpha_{\mathrm{g},\mathrm{nir}}^\mu\) |
ground_direct_beam_albedo_nir [Diagnostic: effective ground albedo for direct beam radiation in the near-infrared band, accounting for snow cover]
|
\(\alpha_{\mathrm{g},\mathrm{vis}}^{\mathrm{d}}\) |
ground_diffuse_albedo_vis [Diagnostic: effective ground albedo for diffuse radiation in the visible band, accounting for snow cover]
|
\(\alpha_{\mathrm{g},\mathrm{vis}}^\mu\) |
ground_direct_beam_albedo_vis [Diagnostic: effective ground albedo for direct beam radiation in the visible band, accounting for snow cover]
|
\(\alpha_{\mathrm{nir}}^{\mathrm{snow}}\) |
snow_nir_albedo [default: 0.65; Fixed parameter: snow-covered surface albedo in the near-infrared band]
|
\(\alpha_{\mathrm{nir}}^{\mathrm{soil}}\) |
soil_nir_albedo [default: 0.29; Fixed parameter: snow-free soil albedo in the near-infrared band]
|
\(\alpha_{\mathrm{vis}}^{\mathrm{snow}}\) |
snow_vis_albedo [default: 0.95; Fixed parameter: snow-covered surface albedo in the visible band]
|
\(\alpha_{\mathrm{vis}}^{\mathrm{soil}}\) |
soil_vis_albedo [default: 0.15; Fixed parameter: snow-free soil albedo in the visible band]
|
\(\beta\) |
plant_root_distribution_shape [PFT-based parameter: shape parameter of the exponential vertical root-fraction distribution]
|
\(\beta_{\mathrm{nir}}^{\mathrm{d}}\) |
canopy_diffuse_upscatter_parameter_nir [Diagnostic: upscatter parameter for diffuse radiation in the near-infrared band]
|
\(\beta_{\mathrm{nir}}^\mu\) |
canopy_direct_beam_upscatter_parameter_nir [Diagnostic: upscatter parameter for direct beam radiation in the near-infrared band]
|
\(\beta_{\mathrm{vis}}^{\mathrm{d}}\) |
canopy_diffuse_upscatter_parameter_vis [Diagnostic: upscatter parameter for diffuse radiation in the visible band]
|
\(\beta_{\mathrm{vis}}^\mu\) |
canopy_direct_beam_upscatter_parameter_vis [Diagnostic: upscatter parameter for direct beam radiation in the visible band]
|
\(\gamma\) |
psychrometric_constant [kPa K-1; Diagnostic: ratio of sensible to latent heat flux for a wet surface at constant pressure]
|
\(\gamma_{\mathrm{s}}\) |
psychrometric constant for the sublimation pathway, \(\gamma\,\lambda_{\mathrm{v}}/\lambda_{\mathrm{s}}\) |
\(\Gamma^\ast\) |
gammastar_25 [default: 42.75 ppm; Constant: photorespiratory CO2 compensation point at 25 degrees Celsius]
|
\(\Delta e_{\mathrm{ice}}\) |
ice-surface vapour pressure deficit, \(\max(e_{\mathrm{sat,ice}}(T_{\mathrm{a}})-e_{\mathrm{a}},\,0)\) |
\(\Delta e_{\mathrm{soil}}\) |
soil_to_air_vapour_pressure_gradient [kPa; Diagnostic: difference between soil-surface vapour pressure and near-surface air vapour pressure]
|
\(\Delta t_{\mathrm{day}}\) |
seconds_per_day [default: 86400 s; Constant: number of seconds in one day]
|
\(\Delta\psi_{\mathrm{soil},i}\) |
soil-to-leaf water potential gradient for layer \(i\) |
\(\epsilon_{\mathrm{g}}\) |
surface_emissivity [default: 0.96; Fixed parameter: broadband thermal infrared emissivity of the soil or snow surface]
|
\(\epsilon_{\mathrm{L}}\) |
light_use_efficiency [default: 1.2 gC MJ-1; Fixed parameter: efficiency of converting leaf-absorbed photosynthetically active radiation into gross carbon assimilation]
|
\(\epsilon_{\mathrm{v}}\) |
canopy emissivity diagnosed from vegetation area index in the longwave routine |
\(\zeta_i\) |
water_uptake_fraction [Diagnostic: fraction of total root water uptake in each soil layer]
|
\(\eta\) |
canopy wind attenuation coefficient |
\(\theta_{\mathrm{co}}\) |
photosynthesis_colimitation_curvature [default: 0.95; Fixed parameter: colimitation curvature of photosynthesis by light and diffusion capacity]
|
\(\theta_i\) |
soil_moisture [m3 m-3; State: volumetric water content of each soil layer]
|
\(\theta_{\mathrm{fc},i}\) |
soil_field_capacity [m3 m-3; Derived parameter: volumetric soil moisture content at field capacity]
|
\(\theta_{\mathrm{sat},i}\) |
soil_saturated_moisture [m3 m-3; Derived parameter: saturated volumetric soil moisture content]
|
\(\theta_{\mathrm{wilt},i}\) |
soil_wilting_point [m3 m-3; Derived parameter: volumetric soil moisture content at wilting point (1500 kPa)]
|
\(\kappa\) |
von_karman_constant [default: 0.41; Constant: von Karman constant]
|
\(k_{\mathrm{cap}}\) |
photosynthesis_temperature_kurtosis [default: 0.183; Fixed parameter: shape parameter of the photosynthesis temperature response]
|
\(\lambda_{\mathrm{s}}\) |
latent_heat_of_sublimation [default: 2.836e+06 J kg-1; Constant: latent heat of sublimation of water at 0Ā°C]
|
\(\lambda_{\mathrm{v}}\) |
latent_heat_of_vaporization [J kg-1; Diagnostic: energy required to vaporize one kilogram of liquid water]
|
\(\bar{\mu}\) |
canopy_diffuse_optical_depth_scale [Diagnostic: average inverse optical depth for diffuse radiation]
|
\(\nu\) |
kinematic_viscosity_of_air [m2 s-1; Diagnostic: ratio of dynamic viscosity to air density]
|
\(\rho_\Lambda\) |
canopy reflectance in band \(\Lambda\) |
\(\rho_{\mathrm{a}}\) |
air_density [kg m-3; Diagnostic: mass of air per unit volume]
|
\(\rho_{\mathrm{nir}}^{\mathrm{leaf}}\) |
leaf_nir_reflectance [PFT-based parameter: leaf reflectance in the near-infrared band]
|
\(\rho_{\mathrm{nir}}^{\mathrm{stem}}\) |
stem_nir_reflectance [PFT-based parameter: stem reflectance in the near-infrared band]
|
\(\rho_{\mathrm{vis}}^{\mathrm{leaf}}\) |
leaf_vis_reflectance [PFT-based parameter: leaf reflectance in the visible band]
|
\(\rho_{\mathrm{vis}}^{\mathrm{stem}}\) |
stem_vis_reflectance [PFT-based parameter: stem reflectance in the visible band]
|
\(\sigma\) |
stefan_boltzmann_constant [default: 5.67037e-08 W m-2 K-4; Constant: stefanāBoltzmann constant]
|
\(\tau_\Lambda\) |
canopy transmittance in band \(\Lambda\) |
\(\tau_{\mathrm{nir}}^{\mathrm{leaf}}\) |
leaf_nir_transmittance [PFT-based parameter: leaf transmittance in the near-infrared band]
|
\(\tau_{\mathrm{nir}}^{\mathrm{stem}}\) |
stem_nir_transmittance [PFT-based parameter: stem transmittance in the near-infrared band]
|
\(\tau_{\mathrm{vis}}^{\mathrm{leaf}}\) |
leaf_vis_transmittance [PFT-based parameter: leaf transmittance in the visible band]
|
\(\tau_{\mathrm{vis}}^{\mathrm{stem}}\) |
stem_vis_transmittance [PFT-based parameter: stem transmittance in the visible band]
|
\(\phi_1\) |
Ross-Goudriaan coefficient 1 |
\(\phi_2\) |
Ross-Goudriaan coefficient 2 |
\(\chi\) |
leaf_angle_dist_index [PFT-based parameter: leaf angle distribution index, ranging from -1 (vertical leaves) to +1 (horizontal leaves)]
|
\(\psi_{\mathrm{fc}}\) |
fixed field-capacity water potential (ā0.033 MPa) |
\(\psi_{\mathrm{soil},50}\) |
jarvis_water_potential_midpoint [default: -0.3 MPa; Fixed parameter: soil water potential at which stomatal conductance is reduced by half]
|
\(\psi_{\mathrm{e},i}\) |
soil_brooks_corey_bubbling_head [MPa; Derived parameter: brooks-Corey air-entry (bubbling) water potential of the soil]
|
\(\psi_{\mathrm{leaf,min}}\) |
plant_minimum_leaf_water_potential [MPa; PFT-based parameter: minimum leaf water potential below which soil-plant water transport ceases]
|
\(\psi_{\mathrm{root}}\) |
root_zone_soil_water_potential [MPa; Diagnostic: mean soil water potential of the root zone]
|
\(\psi_{\mathrm{soil},i}\) |
soil_water_potential [MPa; Diagnostic: soil water potential across all soil layers]
|
\(\omega_{\Lambda}\) |
single-scattering albedo in band \(\Lambda\) |
\(\omega_{\mathrm{nir}}\) |
canopy_single_scattering_albedo_nir [Diagnostic: single-scattering albedo of the canopy in the near-infrared band]
|
\(\omega_{\mathrm{nir}}^{\mathrm{snow}}\) |
snow_nir_omega [default: 0.4; Fixed parameter: single-scattering albedo of intercepted canopy snow in the near-infrared band]
|
\(\omega_{\mathrm{vis}}\) |
canopy_single_scattering_albedo_vis [Diagnostic: single-scattering albedo of the canopy in the visible band]
|
\(\omega_{\mathrm{vis}}^{\mathrm{snow}}\) |
snow_vis_omega [default: 0.8; Fixed parameter: single-scattering albedo of intercepted canopy snow in the visible band]
|
\(A_i\) |
soil_brooks_corey_a [MPa; Derived parameter: air-entry pressure coefficient in the Brooks-Corey soil water retention curve]
|
\(a_T\) |
jarvis_temperature_curvature [default: 0.0016 degC-2; Fixed parameter: quadratic sensitivity of stomatal conductance to air temperature departure from the optimum]
|
\(A_{\mathrm{can}}\) |
canopy photosynthetic assimilation capacity |
\(A_{\mathrm{cap}}\) |
photosynthesis_capacity_coefficient [default: 25 gC m-2 leaf day-1; Fixed parameter: leaf-scale photosynthetic assimilation capacity at optimum temperature]
|
\(A_{\mathrm{d}}\) |
diffusion-limited canopy assimilation |
\(A_{\mathrm{l}}\) |
light-limited canopy assimilation |
\(\mathrm{APAR}_{\mathrm{leaf}}\) |
leaf_apar_Wm2 [W m-2; Flux: photosynthetically active radiation absorbed by leaf surfaces]
|
\(B_i\) |
soil_brooks_corey_b [Derived parameter: pore-size distribution index in the Brooks-Corey soil water retention curve]
|
\(b_{\mathrm{inf}}\) |
soil_infiltration_shape_parameter [default: 0.2; Fixed parameter: shape parameter of the variable infiltration capacity curve]
|
\(B_{\mathrm{evap}}\) |
top-layer saturation ratio used in soil surface resistance |
\(c_p\) |
specific_heat_capacity_air [default: 1004.6 J kg-1 K-1; Constant: specific heat capacity of air]
|
\(C_{\mathrm{a}}\) |
co2_ppm [ppm; Driver: atmospheric carbon dioxide concentration]
|
\(C_{\mathrm{i,can}}\) |
canopy internal COā concentration |
\(C_{\mathrm{O_2}}\) |
atmospheric_o2 [default: 209476 ppm; Constant: atmospheric O2 mole fraction]
|
\(c_{\mathrm{liq}}\) |
canopy_interception_capacity_coefficient [default: 0.2 mm (m2 m-2)-1; Fixed parameter: maximum liquid water the canopy can hold per unit leaf area index]
|
\(c_{\mathrm{melt}}\) |
snow_melt_coefficient [default: 3 mm degC-1 day-1; Fixed parameter: degree-day snowmelt coefficient: melt per degree above the freeze threshold per day]
|
\(c_{\mathrm{snow}}\) |
canopy_solid_interception_capacity_coefficient [default: 1 mm (m2 m-2)-1; Fixed parameter: maximum snow water equivalent the canopy can hold per unit vegetation area index]
|
\(\mu_s\) |
cosine_solar_zenith [Driver: cosine of the solar zenith angle]
|
\(d\) |
zero-plane displacement height of the canopy |
\(D_i\) |
gravitational_drainage_mmday [mm day-1; Flux: downward water flux leaving each soil layer under gravity]
|
\(D_{\mathrm{v}}\) |
water_vapour_diffusivity [m2 s-1; Diagnostic: molecular diffusivity of water vapour in air]
|
\(e_{\mathrm{a}}\) |
air vapour pressure |
\(e_{\mathrm{s,air}}\) |
mean saturation vapour pressure at daily \(T_{\max}\) and \(T_{\min}\) |
\(e_{\mathrm{soil}}\) |
soil-surface vapour pressure |
\(E_{\mathrm{can,liq}}^\ast\) |
potential_canopy_liquid_evaporation [mm day-1; Diagnostic: atmospheric demand for evaporation from wet canopy surfaces]
|
\(E_{\mathrm{can,liq}}\) |
canopy_liquid_evaporation_mmday [mm day-1; Flux: water flux evaporated from wet canopy surfaces]
|
\(E_{\mathrm{snow}}^\ast\) |
potential_snow_sublimation [mm day-1; Diagnostic: atmospheric demand for sublimation from the ground snowpack]
|
\(E_{\mathrm{snow}}\) |
snow_sublimation_mmday [mm day-1; Flux: water flux sublimated from the ground snowpack]
|
\(E_{\mathrm{soil}}^\ast\) |
potential_surface_evaporation [mm day-1; Diagnostic: atmospheric demand for evaporation from the snow-free soil surface]
|
\(E_{\mathrm{soil}}\) |
soil_evaporation_mmday [mm day-1; Flux: water flux evaporated from the top soil layer]
|
\(E_{\mathrm{sub}}^\ast\) |
potential_canopy_sublimation [mm day-1; Diagnostic: atmospheric demand for sublimation of solid-phase water stored on the canopy]
|
\(E_{\mathrm{sub}}\) |
canopy_solid_sublimation_mmday [mm day-1; Flux: water flux sublimated from snow intercepted on the canopy]
|
\(E_{\mathrm{tr}}^\ast\) |
potential_canopy_transpiration [mm day-1; Diagnostic: maximum water vapour flux from canopy leaves to the atmosphere]
|
\(E_{\mathrm{tr}}\) |
canopy_transpiration_mmday [mm day-1; Flux: water flux from the soil column to the atmosphere through plants]
|
\(ET\) |
total_et_mmday [mm day-1; Flux: total evapotranspiration water flux to the atmosphere]
|
\(f_{\mathrm{dir}}\) |
direct_beam_fraction [default: 0.5; Fixed parameter: fraction of incoming shortwave radiation that is direct beam]
|
\(f_{\mathrm{freeze}}\) |
freeze-reduction factor applied to hydraulic conductivity |
\(f_{\mathrm{gs}}\) |
combined Jarvis stomatal stress factor |
\(f_{\mathrm{leaf}}\) |
leaf fraction of vegetation area index |
\(f_{\mathrm{int}}\) |
Beer-law canopy snow interception fraction, \(1-\exp(-0.5\,\mathrm{VAI})\) |
\(f_{\mathrm{root},i}\) |
root_fraction [Derived parameter: normalised root fraction per soil layer]
|
\(f_{\mathrm{snow}}\) |
snow_cover_fraction [Diagnostic: fraction of the ground surface covered by snow]
|
\(f_{\mathrm{stem}}\) |
stem fraction of vegetation area index |
\(f_{\mathrm{vis}}\) |
vis_fraction_of_shortwave [default: 0.5; Fixed parameter: fraction of incoming shortwave radiation in the visible (400-700 nm) band]
|
\(f_{\mathrm{warm}}\) |
fraction of the day above the freeze-transition threshold |
\(g_{\mathrm{a,above}}\) |
above_canopy_aerodynamic_conductance [m s-1; Diagnostic: aerodynamic conductance for water vapour transport from the canopy top to the reference height]
|
\(g_{\mathrm{a,can}}\) |
canopy_aerodynamic_conductance [m s-1; Diagnostic: effective aerodynamic conductance for water vapour transport between the canopy and the atmosphere]
|
\(g_{\mathrm{a,soil}}\) |
soil_aerodynamic_conductance [m s-1; Diagnostic: aerodynamic conductance for water vapour transport between the soil surface and the canopy air]
|
\(g_{\mathrm{b}}\) |
leaf_boundary_layer_conductance [m s-1; Diagnostic: bulk conductance for water vapour across the laminar boundary layer of canopy leaves]
|
\(g_{\mathrm{b,CO_2}}\) |
canopy boundary-layer conductance on a COā basis |
\(D_{\mathrm{b,CO_2/H_2O}}\) |
gb_ratio_co2_to_h2o [default: 0.729927; Constant: ratio of CO2 to H2O molecular diffusivity in the leaf boundary layer]
|
\(g_{\mathrm{c,CO_2}}\) |
total canopy COā conductance |
\(G(\mu_s)\) |
mean projected vegetation area in the solar direction, \(\phi_1+\phi_2\mu_s\) |
\(g_{\mathrm{s,can}}\) |
canopy_stomatal_conductance [mmol H2O m-2 s-1; Diagnostic: canopy-scale stomatal conductance to water vapour]
|
\(D_{\mathrm{s,CO_2/H_2O}}\) |
gs_ratio_co2_to_h2o [default: 0.625; Constant: ratio of CO2 to H2O molecular diffusivity through stomata]
|
\(g_{\mathrm{s,CO_2}}\) |
canopy stomatal conductance on a COā basis |
\(g_{\mathrm{s,leaf}}\) |
leaf stomatal conductance |
\(g_{\mathrm{s,max}}\) |
jarvis_max_stomatal_conductance [default: 500 mmol H2O m-2 s-1; Fixed parameter: upper bound on leaf stomatal conductance to water vapour]
|
\(g_{\mathrm{s,min}}\) |
jarvis_min_stomatal_conductance [default: 10 mmol H2O m-2 s-1; Fixed parameter: lower bound on leaf stomatal conductance to water vapour]
|
\(g_{\mathrm{ss}}\) |
soil_surface_conductance [m s-1; Diagnostic: soil surface conductance to water vapour]
|
\(\mathrm{GPP}\) |
gpp_gCm2day [gC m-2 day-1; Flux: gross primary productivity]
|
\(h_{\mathrm{c}}\) |
canopy_height [m; PFT-based parameter: canopy height]
|
\(I_i\) |
infiltration_mmday [mm day-1; Flux: water flux entering each soil layer from above]
|
\(I_{\mathrm{cap},\max}\) |
maximum infiltration capacity |
\(K(\theta)\) |
soil hydraulic conductivity as a function of moisture content |
\(K_{\mathrm{dir}}\) |
canopy_direct_beam_extinction_coefficient [Diagnostic: optical depth of the direct beam per unit leaf and stem area index]
|
\(K_h\) |
canopy-top turbulent exchange coefficient |
\(K_i\) |
soil_conductivity [mm h-1; Diagnostic: effective hydraulic conductivity of each soil layer]
|
\(K_{i,\mathrm{unf}}\) |
unfrozen hydraulic conductivity |
\(K_{\mathrm{m}}\) |
COā half-saturation constant |
\(K_{\mathrm{m},0}\) |
co2_michaelis_constant_25 [default: 404.9 ppm; Constant: rubisco Michaelis constant for CO2 at 25 degrees Celsius]
|
\(k_{K_{\mathrm{m}}}\) |
co2_michaelis_ha [default: 79430 J mol-1; Constant: activation energy of the Rubisco Michaelis constant for CO2]
|
\(K_{\mathrm{o}}\) |
Oā MichaelisāMenten constant |
\(K_{\mathrm{o},0}\) |
o2_michaelis_constant_25 [default: 278400 ppm; Constant: rubisco Michaelis constant for O2 at 25 degrees Celsius]
|
\(k_{K_{\mathrm{o}}}\) |
o2_michaelis_ha [default: 36380 J mol-1; Constant: activation energy of the Rubisco Michaelis constant for O2]
|
\(K_{\mathrm{sat},i}\) |
soil_saturated_hydraulic_conductivity [mm h-1; Derived parameter: saturated hydraulic conductivity]
|
\(k_f\) |
soil_freeze_transition_sharpness [default: 5; Fixed parameter: sharpness of the temperature-driven freeze reduction of soil hydraulic conductivity]
|
\(k_{\mathrm{ss}}\) |
soil_surface_resistance_moisture_sensitivity [default: 4.225; Fixed parameter: exponential sensitivity coefficient of soil surface resistance to top-layer soil moisture]
|
\(k_{\mathrm{vpd}}\) |
jarvis_vpd_sensitivity [kPa-1; PFT-based parameter: sensitivity of stomatal conductance to vapour pressure deficit]
|
\(k_{\psi}\) |
jarvis_water_potential_steepness [default: 3 MPa-1; Fixed parameter: steepness of the sigmoid stomatal response to soil water potential]
|
\(k_{\Gamma}\) |
gammastar_ha [default: 37830 J mol-1; Constant: activation energy of the photorespiratory CO2 compensation point]
|
\(l_m\) |
canopy mixing length |
\(L_m\) |
canopy momentum length scale |
\(\mathrm{LAI}\) |
lai [m2 m-2; Driver: leaf area index]
|
\(\mathrm{LAI}_{\mathrm{eff}}\) |
effective leaf area index for canopy conductance scaling |
\(LE\) |
latent_heat_flux_Wm2 [W m-2; Flux: latent heat flux associated with evaporation and sublimation]
|
\(M_{\mathrm{snow}}\) |
snowmelt_mmday [mm day-1; Flux: water flux released from the snowpack by melting]
|
\(N_{\mathrm{run}}\) |
number of runoff-generation soil layers |
\(N_{\mathrm{soil}}\) |
number of soil layers |
\(n_{\mathrm{a}}\) |
air_molar_density [mol m-3; Diagnostic: molar concentration of air]
|
\(p_0\) |
standard_air_pressure [default: 101325 Pa; Constant: reference air pressure]
|
\(P\) |
pr_mmday [mm day-1; Driver: total daily precipitation as liquid-water equivalent]
|
\(\mathrm{PAR}_{1/2}\) |
jarvis_radiation_half_saturation [W m-2; PFT-based parameter: absorbed PAR at which the stomatal radiation response reaches half its maximum]
|
\(\mathrm{PAR}_{\mathrm{in}}\) |
incoming_par_Wm2 [W m-2; Flux: incoming photosynthetically active radiation at the canopy top]
|
\(P_{\mathrm{liq,surf}}\) |
surface liquid water input |
\(P_{\mathrm{rain}}\) |
rainfall_mmday [mm day-1; Flux: liquid precipitation reaching the canopy top]
|
\(P_{\mathrm{rain,int}}\) |
canopy_liquid_interception_mmday [mm day-1; Flux: liquid water flux intercepted by the canopy]
|
\(P_{\mathrm{snow}}\) |
snowfall_mmday [mm day-1; Flux: solid precipitation reaching the canopy top]
|
\(P_{\mathrm{snow,ground}}\) |
snowfall_to_ground_mmday [mm day-1; Flux: total snowfall reaching the ground, including direct throughfall and canopy unloading]
|
\(P_{\mathrm{snow,int}}\) |
canopy_solid_interception_mmday [mm day-1; Flux: snow water flux intercepted by the canopy]
|
\(P_{\mathrm{snow,unload}}\) |
canopy_solid_unload_mmday [mm day-1; Flux: snow water flux released from the canopy]
|
\(P_{\mathrm{through}}\) |
throughfall_from_canopy_mmday [mm day-1; Flux: liquid precipitation reaching the soil surface without canopy interception]
|
\(Q_{\mathrm{deep}}\) |
underflow_mmday [mm day-1; Flux: downward water flux leaving the base of the soil column]
|
\(Q_{\mathrm{surf}}\) |
runoff_mmday [mm day-1; Flux: water flux leaving the land surface as runoff]
|
\(R\) |
universal_gas_constant [default: 8.3144 J mol-1 K-1; Constant: universal gas constant]
|
\(r_{\mathrm{a}}\) |
aerodynamic resistance above the canopy |
\(r_{\mathrm{b}}\) |
leaf boundary-layer resistance |
\(r_{\mathrm{c}}\) |
canopy stomatal resistance |
\(r_i\) |
unnormalised root-distribution weight for layer \(i\) |
\(r_{\mathrm{soil}}\) |
aerodynamic resistance between the soil surface and the canopy air space |
\(r_{\mathrm{ss}}\) |
soil surface resistance to water vapour |
\(r_u\) |
friction-velocity to wind-speed ratio |
\(R^{\mathrm{n}}_{\mathrm{v}}\) |
canopy_net_radiation_Wm2 [W m-2; Flux: net radiative flux at the canopy surface]
|
\(R^{\mathrm{n}}_{\mathrm{g}}\) |
soil_net_radiation_Wm2 [W m-2; Flux: net radiative flux at the soil surface]
|
\(R^{\mathrm{n}}_{\mathrm{lw}}\) |
net_lwrad_Wm2 [W m-2; Flux: net longwave radiative flux absorbed by the land surface]
|
\(R^{\mathrm{n}}_{\mathrm{lw},\mathrm{v}}\) |
canopy_net_lwrad_Wm2 [W m-2; Flux: longwave radiative flux absorbed by the canopy]
|
\(R^{\mathrm{n}}_{\mathrm{lw},\mathrm{g}}\) |
soil_net_lwrad_Wm2 [W m-2; Flux: longwave radiative flux absorbed by the soil surface]
|
\(R^{\mathrm{n}}_{\mathrm{sw}}\) |
net_swrad_Wm2 [W m-2; Flux: net shortwave radiative flux absorbed by the land surface]
|
\(R^{\mathrm{n}}_{\mathrm{sw},\mathrm{v}}\) |
canopy_net_swrad_Wm2 [W m-2; Flux: shortwave radiative flux absorbed by the canopy]
|
\(R^{\mathrm{n}}_{\mathrm{sw},\mathrm{g}}\) |
soil_net_swrad_Wm2 [W m-2; Flux: shortwave radiative flux absorbed by the soil surface (visible plus near-infrared)]
|
\(R_{\mathrm{lw}}^\downarrow\) |
lwdown_Wm2 [W m-2; Driver: downward longwave (infrared) radiation at the surface]
|
\(R_{\mathrm{lw,g}}^\uparrow\) |
lwup_below_canopy_Wm2 [W m-2; Flux: upward longwave radiation below the vegetation canopy]
|
\(R_{\mathrm{lw,v}}^\downarrow\) |
lwdown_below_canopy_Wm2 [W m-2; Flux: downward longwave radiation below the vegetation canopy]
|
\(R_{\mathrm{lw,vg}}^\uparrow\) |
lwup_above_canopy_Wm2 [W m-2; Flux: upward longwave radiation above the vegetation canopy]
|
\(R_{\mathrm{sw}}^\downarrow\) |
swdown_Wm2 [W m-2; Driver: downward shortwave radiation at the surface]
|
\(Re\) |
Reynolds number at the leaf scale |
\(RWU_i\) |
root_water_uptake_mmday [mm day-1; Flux: water flux extracted from each soil layer by roots]
|
\(s\) |
saturation_vapour_pressure_slope [kPa K-1; Diagnostic: rate of change of saturation vapour pressure with temperature]
|
\(s_{\mathrm{ice}}\) |
slope of the saturation vapour pressure curve over ice |
\(S^\downarrow\) |
direct-beam source term for the downward diffuse stream |
\(S^\uparrow\) |
direct-beam source term for the upward diffuse stream |
\(S_i\) |
soil-plant water supply from layer \(i\) |
\(\mathrm{SAI}\) |
stem_area_index [m2 m-2; PFT-based parameter: one-sided stem area index]
|
\(Sh\) |
Sherwood number at the leaf scale |
\(S_{\mathrm{soil},i}\) |
water storage in soil layer \(i\) (mm) |
\(W_{\mathrm{can,int}}\) |
intercepted liquid canopy storage after throughfall |
\(W_{\mathrm{can,liq,max}}\) |
maximum liquid canopy interception capacity |
\(W_{\mathrm{can,liq}}^{\,t}\) |
canopy_liquid_interception_storage [mm; State: liquid water stored on wet canopy surfaces]
|
\(W_{\mathrm{can,sol,max}}\) |
maximum solid canopy interception capacity |
\(W_{\mathrm{can,sol}}^{\,t}\) |
canopy_solid_interception_storage [mm; State: snow water equivalent stored on the canopy]
|
\(W_{\mathrm{cap},0}\) |
initial infiltration-curve storage capacity |
\(W_{\mathrm{run}}\) |
total water storage in the runoff-generation zone (mm) |
\(W_{\mathrm{run,max}}\) |
maximum storage capacity of the runoff-generation zone (mm) |
\(W_{\mathrm{scale}}\) |
snow_cover_scale [default: 25 mm; Fixed parameter: characteristic snow water equivalent at which half the ground surface is snow-covered]
|
\(W_{\mathrm{snow}}^{\,t}\) |
snow_water_storage [mm; State: snow water equivalent stored in the surface snowpack]
|
\(T_0\) |
absolute_zero_offset [default: 273.15 K; Constant: zero degrees Celsius expressed in Kelvin]
|
\(T_{\mathrm{a}}\) |
ta_degC [degC; Driver: near-surface air temperature]
|
\(T_{\mathrm{a},K}\) |
air temperature in Kelvin |
\(T_f\) |
soil_freeze_transition_temperature [default: 1 degC; Fixed parameter: temperature threshold below which freezing reduces soil hydraulic conductivity]
|
\(T_{\mathrm{freeze}}\) |
freezing_point [default: 0 degC; Constant: temperature at which water freezes]
|
\(T_{\mathrm{g}}\) |
ground temperature (approximated as \(T_{\mathrm{a}}\) in ADELM v1) |
\(T_{\max}\) |
ta_max_degC [degC; Driver: daily maximum near-surface air temperature]
|
\(T_{\mathrm{max,cap}}\) |
photosynthesis_temperature_maximum [default: 56 degC; Fixed parameter: upper temperature bound of the photosynthesis temperature response]
|
\(T_{\min}\) |
ta_min_degC [degC; Driver: daily minimum near-surface air temperature]
|
\(T_{\mathrm{opt,cap}}\) |
photosynthesis_temperature_optimum [default: 30 degC; Fixed parameter: optimum temperature of the photosynthesis temperature response]
|
\(T_{\mathrm{opt,gs}}\) |
jarvis_temperature_optimum [default: 25 degC; Fixed parameter: air temperature at which stomatal conductance reaches its temperature-response maximum]
|
\(T_{\mathrm{v}}\) |
vegetation temperature (approximated as \(T_{\mathrm{a}}\) in ADELM v1) |
\(u\) |
wind_ms [m s-1; Driver: wind speed at reference height (10 m)]
|
\(u_{0.75}\) |
wind speed at 0.75 canopy height |
\(u_{\mathrm{c}}\) |
canopy-top wind speed |
\(u_{50}\) |
wind speed at the 50 m reference height |
\(u_\ast\) |
friction velocity |
\(\mathrm{VAI}\) |
vegetation_area_index [m2 m-2; Diagnostic: total vegetation area index: one-sided leaf area index plus stem area index]
|
\(V_w\) |
partial_molar_volume_of_water [default: 1.805e-05 m3 mol-1; Constant: partial molar volume of water at 20Ā°C]
|
\(\mathrm{VPD}\) |
vpd_kPa [kPa; Driver: vapour pressure deficit]
|
\(w_{\mathrm{leaf}}\) |
canopy_leaf_width [m; PFT-based parameter: characteristic leaf width]
|
\(W_{\mathrm{inf}}\) |
total water infiltrating into the soil column |
\(W_{\mathrm{inf},i}^\downarrow\) |
infiltrating water available at the top of layer \(i\) |
\(W_{\mathrm{inf},N_{\mathrm{run}}+1}^\downarrow\) |
saturation-excess water leaving the runoff-generation zone |
\(z_0\) |
aerodynamic roughness length of the canopy |
\(z_{0m,\mathrm{soil}}\) |
soil_roughness_length [default: 0.01 m; Fixed parameter: aerodynamic roughness length for momentum over soil]
|
\(z_{\mathrm{bottom},i}\) |
bottom depth of soil layer \(i\) |
\(z_{\mathrm{eff}}\) |
effective reference height above a short canopy |
\(z_{\mathrm{ref}}\) |
reference height above the canopy |
\(z_{\mathrm{soil}}\) |
soil-surface roughness length within the canopy air space |
\(z_{\mathrm{top},i}\) |
top depth of soil layer \(i\) |
\(Z_w\) |
transition height between the canopy and the overlying logarithmic layer |
ADELM