doubt about SRELAXATION

[mashinde]

Dear Friends,

I am running model with bulk forcings. I have following doubts.
what is the relation between SRELAXATION and EMINUSP ?

Is it like this ....
case(1)
when I have to switch ON SRELAXATION in cppdef.h then I have to switch OFF EMINUSP.

case(2)
when I have to switch OFF SRELAXATION in cppdef.h then I have to switch ON EMINUSP.

Which case is most suitable and what is the relation associated with Bulk forcings?

What is the most appropriate relaxation/nudging period(in days)? is there any thumb rule?



any suggestions/comments ?


Thanking you.

[kate]

You can have both SCORRECTION and EMINUSP if you like.

As for timescale, we're using 60-90 days. Note that this happens in set_vbc.F and uses Tnudg, which is also used for the lateral boundary condition timescale. So we set Tnudg for the BC, then multiply it by whatever factor we need to get the desired timescale:

Code: Select all

          stflx(i,j,isalt)=stflx(i,j,isalt)*t(i,j,N(ng),nrhs,isalt)-    &
     &                     Tnudg(isalt,ng)*Hz(i,j,N(ng))*               &
#       if defined NEP5 || defined BERING || defined CHUKCHI
! 60 days from Tnudg of 360 days
     &                     6.0_r8*                                      &
#       elif defined CORAL || defined NEP6 || defined NWA
! 90 days from Tnudg of 360 days
     &                     4.0_r8*                                      &
#       endif
     &                     (t(i,j,N(ng),nrhs,isalt)-sss(i,j))