Hi all,
I ran a CLM5 simulation using I2000Clm50SpGs compset with 25km resolution, and I got two questions while I was interpreting the results.
1) surface energy balance
It seems that surface energy balance check will be done at every time step in CLM and clm model won't keep going if errorseb is greater than 1e-5 (W/m2). However, when I was analyzing my hourly energy flux output, I found that urban and rural energy balance error terms can be pretty large negative values (-20 W/m2) for some grids. The urban(_U) and rural(_R) error terms are calculated by:
Error_U=FSA_U-FIRA_U-EFLX_LH_TOT_U-FSH_U-FGR_U+HEAT_FROM_AC+WASTEHEAT
Error_R=FSA_R-FIRA_R-EFLX_LH_TOT_R-FSH_R-FGR_R
(absorbed solar radiation - net longwave radiation - latent heat flux - sensible heat flux - heat storage flux + anthropogenic heat flux (if any))
Are there any energy flux terms that I missed?
2) 2m and forcing height specific humidity
This one might be too specific. I found that my 2m specific humidity can be lower than forcing height specific humidity at many regions, and I am not sure whether this is normal (I expect the surface specific humidity to be higher than 30m specific humidity. Please correct me if I am wrong)
Thank you! Any suggestions or opinions are appreciated!
I ran a CLM5 simulation using I2000Clm50SpGs compset with 25km resolution, and I got two questions while I was interpreting the results.
1) surface energy balance
It seems that surface energy balance check will be done at every time step in CLM and clm model won't keep going if errorseb is greater than 1e-5 (W/m2). However, when I was analyzing my hourly energy flux output, I found that urban and rural energy balance error terms can be pretty large negative values (-20 W/m2) for some grids. The urban(_U) and rural(_R) error terms are calculated by:
Error_U=FSA_U-FIRA_U-EFLX_LH_TOT_U-FSH_U-FGR_U+HEAT_FROM_AC+WASTEHEAT
Error_R=FSA_R-FIRA_R-EFLX_LH_TOT_R-FSH_R-FGR_R
(absorbed solar radiation - net longwave radiation - latent heat flux - sensible heat flux - heat storage flux + anthropogenic heat flux (if any))
Are there any energy flux terms that I missed?
2) 2m and forcing height specific humidity
This one might be too specific. I found that my 2m specific humidity can be lower than forcing height specific humidity at many regions, and I am not sure whether this is normal (I expect the surface specific humidity to be higher than 30m specific humidity. Please correct me if I am wrong)
Thank you! Any suggestions or opinions are appreciated!