Hi, I ran a CLM5 simulation using I2000Clm50SpGs compset with 25km resolution. I am wondering if we can calculate the effective emissivity of urban and rural area from model radiation and temperature output?
For example, I tried to calculate emissivity by Stefan-Boltzmann equation using emitted longwave radiation and ground temperature:
Emissivity_U=FIRE_U/(S-BConstant*TG_U**4.0)
Emissivity_R=FIRE_R/(S-BConstant*TG_R**4.0). However, the calculated urban and rural emissivity seems too large (mostly >0.95). Then I realized that maybe I need use radiative surface temperature instead of ground temperature. But radiometric surface temperature is not an output of CLM5.
Any suggestions on calculating urban and rural effective emissivity? I noticed that urban and rural emissivity were assumed to be ~0.88 and ~0.96 in previous studies but I am still not clear how to get these values. Thanks!!
For example, I tried to calculate emissivity by Stefan-Boltzmann equation using emitted longwave radiation and ground temperature:
Emissivity_U=FIRE_U/(S-BConstant*TG_U**4.0)
Emissivity_R=FIRE_R/(S-BConstant*TG_R**4.0). However, the calculated urban and rural emissivity seems too large (mostly >0.95). Then I realized that maybe I need use radiative surface temperature instead of ground temperature. But radiometric surface temperature is not an output of CLM5.
Any suggestions on calculating urban and rural effective emissivity? I noticed that urban and rural emissivity were assumed to be ~0.88 and ~0.96 in previous studies but I am still not clear how to get these values. Thanks!!