I want to know how sensible and latent heat flux are calculated in CAM4, compset F

[QikaiYu]

Compset F, namely running CAM4 standalone. The SST and SIC data used in CAM4 are directly read from nc file.

Therefore, I am curious about the calculation of surface sensible/latent heat flux over sea and sea ice. I have checked the CAM4 scientific description, but useful information is not found.

Any reply would be appreciated!

 

[brianpm]

Each surface component is responsible for providing the surface fluxes. These are organized in data structures in $CAM/src/controlcamsrfexch.F90.

The exchanges are mediated by the coupler, which is why it is hard to track down the calculations.

I think where you should look is in $CAM/share/src/shr_flux_mod.F90. For example, over ocean you can find the latent heat flux calculation:

lat (n) = loc_latvap * tau * qstar / ustar

and over sea ice:
!--- heat flux ---
sen (n) = cp * tau * tstar / ustar
lat (n) = ltheat * tau * qstar / ustar

 

[QikaiYu]

Each surface component is responsible for providing the surface fluxes. These are organized in data structures in $CAM/src/controlcamsrfexch.F90.

The exchanges are mediated by the coupler, which is why it is hard to track down the calculations.

I think where you should look is in $CAM/share/src/shr_flux_mod.F90. For example, over ocean you can find the latent heat flux calculation:

lat (n) = loc_latvap * tau * qstar / ustar

and over sea ice:
!--- heat flux ---
sen (n) = cp * tau * tstar / ustar
lat (n) = ltheat * tau * qstar / ustar

Thank you very much! This is a useful information that enlightens me. Nevertheless, by carefully reading code, I find that the sensible/latent heat flux over sea ice may be calculated in subroutine surface_fluxes. Would you like to check it for me?

Best wish

 

[hannay]

@dbailey : do you know the answer to this?