Scheduled Downtime
On Tuesday 24 October 2023 @ 5pm MT the forums will be in read only mode in preparation for the downtime. On Wednesday 25 October 2023 @ 5am MT, this website will be down for maintenance and expected to return online later in the morning.
Normal Operations
The forums are back online with normal operations. If you notice any issues or errors related to the forums, please reach out to help@ucar.edu

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

juliettelavoie

Juliette Lavoie
New Member
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

Member
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

Code:
 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.
 
Top