| Tc | temperature at the leaf surface (K) |
| c0 = 32.86 | scaling constant (J mol−1) |
| ΔHa_en = 83129 | activation energy of emission enzyme (J mol−1) |
| ΔHd_en = 284600 | deactivation energy of emission enzyme (J mol−1) |
| ΔSen = 887.5 | entropy term of emission enzyme (J mol−1 K−1) |
| RG = 8.314 | (J mol−1·K−1) |