is it possible to run cam4 with MG microphysics scheme?

[Jun]

Hi Forum, I'm trying to change the default microphysics scheme in cam4 from 'RK' to 'MG'. However, the model crashed with an error of "CNST_ADD: advected tracer index greater than pcnst". I was wondering if anybody has successful experience of changing microphysics scheme for cam4? Thanks

 

[cacraig]

Could you please tell us what version of the model you are using?

 

[Jun]

Thanks for replying. I'm using cesm1.2.2.

 

[andrew]

CAM4 is not designed to run with MG microphysics. It is not supported. You will need to use CAM5.

 

[Jun]

CAM4 is not designed to run with MG microphysics. It is not supported. You will need to use CAM5

Thanks!