Prodprec

[sandeep_sahany@indiatimes_com]

Hi,
In CAM3.0, like ZMNTPRPD, ZMNTSNPD, HKNTPRPD & HKNTSNPD, is
there any variable, which gives the vertical distribution of large scale
(stratiform) precipitation ? It seems PRODPREC is a component of it, but I
think there are some more terms, which I am not being able to point out. Any help on this issue will be highly appreciated.

Thanking you in advance,
Saroj

 

[rneale]

I think PRODPREC gives you the total precipitation production from the large-scale scheme but it will not be the net production of precip. or the net q tendency given evaporation contributions are absent.

 

[sandeep_sahany@indiatimes_com]

I think PRODPREC gives you the total precipitation production from the large-scale scheme but it will not be the net production of precip. or the net q tendency given evaporation contributions are absent.

Thanks for your help.
Which variable gives the evaporation of the large-scale precipitation ?
otherwise,
Is there any variable, which gives the net(not total) production of the large-scale precipitation ?

Anticipating your prompt reply,
Saroj

 

[rneale]

You need to look in the routine pcond in cldwat.F90 of the CAM physics source code directory and figure out which of the following variables you are looking for.

real(r8), intent(out) :: cme (pcols,pver) ! rate of cond-evap of condensate (1/s)
real(r8), intent(out) :: prodprec(pcols,pver) ! rate of conversion of condensate to precip (1/s)
real(r8), intent(out) :: evapprec(pcols,pver) ! rate of evaporation of falling precip (1/s)
real(r8), intent(out) :: evapsnow(pcols,pver) ! rate of evaporation of falling snow (1/s)

If you are looking for the net precip. production (condensate -> precipitate) then it would be
prodprec-evapprec-evapsnow at each level.