| tfrz | 273.16 | \( K \) | Temperature corresponding to \( 0^{\circ}C \) | 
| sboltz | 5.67E-8 | \( W \cdot m^{-2} \cdot K^{-4} \) | Stefan-Boltzmann constant | 
| emsoil | 1.0 | \(  -  \) | Soil emissivity | 
| emleaf | 1.0 | \(  -  \) | Leaf emissivity | 
| capp | 1004.64 | \( J \cdot kg^{-1} \cdot K^{-1} \) | Air specific heat | 
| hl | 2.5014E6 | \( J \cdot kg^{-1} \) | Latent heat of vaporization | 
| hlf | 0.334E6 | \( J \cdot kg^{-1} \) | Latent heat of fusion | 
| hls | 2.8350E6 | \( J \cdot kg^{-1} \) | Latent heat of Sublimation | 
| dheat | 21.5E-6 | \( cm^{2} \cdot s^{-1} \) | Molecular diffusivity for heat | 
| grav | 9.8086 | \( m \cdot s^{-2} \) | Gravity acceleration | 
| rgas | 8.3143 | \(J \cdot mol^{-1} \cdot K^{-1} \) | Universal gas const | 
| rmair | 0.02897 | \( kg \cdot mol^{-1} \) | Molecular weight of dry air | 
| rmh2o | 0.018016 | \( kg \cdot mol^{-1} \) | Molecular weight of water | 
| cgsnow | 2090.0 | \( J \cdot kg^{-1} \cdot K^{-1} \) | Specific heat for snow | 
| csice | 2.100E3 | \( J \cdot kg^{-1} \cdot K^{-1} \) | Specific heat for ice | 
| cswat | 4.218E3 | \( J \cdot kg^{-1} \cdot K^{-1} \) | Specific heat for water at \( 0^{\circ}C \) | 
| density_liq | 1000.0 | \( kg \cdot m^{-3} \) | Density of liquid water | 
| density_ice | 921.0 | \( kg \cdot m^{-3} \) | Density of ice |