Diffuse/direct and visible/near infrared shortwave fluxes over the ocean

[juliettelavoie]

Hello,

I am working with sea ice in the Arctic in the CESM-LE.
I interested in the breakdown of the shortwave fluxes in the diffuse/direct and visible/near infrared categories.
I found the albedo breakdown (alvdr,alvdf,alidr,alidf) on ice and the flux breakdown over land only (FSDSNI,FSDSND,FSDSVI,FSDSVD).
Are the sw fluxes breakdown available over the ocean?


Thank you for your help!

 

[brianpm]

I am pretty sure that the fluxes at the surface are divided between direct and diffuse, and both fluxes are passed from the atmosphere component to the coupler to be passed on to the other components.

Here are a few lines from cesm2_1_1/components/cam/src/physics/rrtmg/radsw.F90

 real(r8), intent(out) :: sols(pcols)      ! Direct solar rad on surface (< 0.7)
 real(r8), intent(out) :: soll(pcols)      ! Direct solar rad on surface (>= 0.7)
 real(r8), intent(out) :: solsd(pcols)     ! Diffuse solar rad on surface (< 0.7)
 real(r8), intent(out) :: solld(pcols)     ! Diffuse solar rad on surface (>= 0.7)

Those fluxes are put into the cam_out structure to be passed to other components. That can be confirmed in cam/src/control/camsrfexch.F90.

I don't know exactly what the ocean model does with those fluxes, but I think that is the information available to the ocean.