computational sequences of precipitation schemes

[sandeep_sahany@indiatimes_com]

Dear CAM-users,
In which sequence the deep convective precipitation, shallow convective precipitation and the large scale(stratiform) precipitaion are parameterized.

Any help in this regard wil be highly appreciated,
Saroj

 

[rneale]

1. Deep Convection
2. Shallow Convection
3. Stratiform Processes

See the routine tphysbc.F90 for the sequence in the source code

 

[sandeep_sahany@indiatimes_com]

1. Deep Convection
2. Shallow Convection
3. Stratiform Processes

See the routine tphysbc.F90 for the sequence in the source code

Dear Neale,
Thanks a lot for your prompt reply. I hope you might be aware of the fact that ZM scheme formally assumes that input columns of temperature and specific humidity are everywhere statically stable and are not supersaturated. If you please refer the Canadian Center for Climate Modelling and Analysis (CCCma) third generation atmospheric general circulation model (AGCM3), the order in which these schemes are called in the AGCM physics package is LARGE SCALE and then Zhang's scheme. So, is there any motivation in doing so in CAM3 ?

Anticipating your generous help.
Saroj

 

[rneale]

The motivation for running the deep convection scheme first is that it produces a source of cloud liquid to the large-scale scheme through cloud-top detrainment. This liquid is taken and added to the prognostic condensate which determines the liquid/ice content of the stratifrom clouds.

 

[sandeep_sahany@indiatimes_com]

Dear Neale,
Thanks a lot ! Now it is clear to me.

Regards,
Saroj