radiation parameterization in CAM 3 and CAM4

[ccsmwrf@gmail_com]

To whom it may concern:

Is there any difference between CAM 3 and CAM4 for the parameterization in radiation scheme (shortwave and longwave radiations)?

Thanks

Yang

 

[hannay]

The radiative scheme is basically the same in CAM3 and CAM4.
The main differences between CAM3 and CAM4 are:
(1) the changes to the deep convection scheme: the introduction of the dilute plume in CAM4 (versus indilute plume in CAM3) and the introduction of sub-grid scale convection momentum in CAM4.
(2) the introduction of the freeze dry parameterization
(3) introduction of a second calculation of the cloud fraction just before the radiation (to solve some inconsistency in the cloud fraction in CAM3)

 

[ccsmwrf@gmail_com]

Thank you very much for your message, Cecile. I appreciate it.

Yang