#include "cppdefs.h"
MODULE tl_v2dbc_mod
#ifdef TANGENT
!
!git $Id$
!svn $Id: tl_v2dbc_im.F 1180 2023-07-13 02:42:10Z arango $
!================================================== Hernan G. Arango ===
! Copyright (c) 2002-2023 The ROMS/TOMS Group Andrew M. Moore !
! Licensed under a MIT/X style license !
! See License_ROMS.md !
!=======================================================================
! !
! This subroutine sets tangent linear lateral boundary conditions for !
! vertically integrated V-velocity. It updates the specified "kout" !
! index. !
! !
! BASIC STATE variables needed: vbar !
! !
!=======================================================================
!
implicit none
!
PRIVATE
PUBLIC :: tl_v2dbc, tl_v2dbc_tile
!
CONTAINS
!
!***********************************************************************
SUBROUTINE tl_v2dbc (ng, tile, kout)
!***********************************************************************
!
USE mod_param
USE mod_ocean
USE mod_stepping
!
! Imported variable declarations.
!
integer, intent(in) :: ng, tile, kout
!
! Local variable declarations.
!
# include "tile.h"
!
CALL tl_v2dbc_tile (ng, tile, &
& LBi, UBi, LBj, UBj, &
& IminS, ImaxS, JminS, JmaxS, &
& krhs(ng), kstp(ng), kout, &
& OCEAN(ng) % ubar, &
& OCEAN(ng) % vbar, &
& OCEAN(ng) % zeta, &
& OCEAN(ng) % tl_ubar, &
& OCEAN(ng) % tl_vbar, &
& OCEAN(ng) % tl_zeta)
RETURN
END SUBROUTINE tl_v2dbc
!
!***********************************************************************
SUBROUTINE tl_v2dbc_tile (ng, tile, &
& LBi, UBi, LBj, UBj, &
& IminS, ImaxS, JminS, JmaxS, &
& krhs, kstp, kout, &
& ubar, vbar, zeta, &
& tl_ubar, tl_vbar, tl_zeta)
!***********************************************************************
!
USE mod_param
USE mod_boundary
USE mod_clima
USE mod_forces
USE mod_grid
USE mod_ncparam
USE mod_scalars
!
! Imported variable declarations.
!
integer, intent(in) :: ng, tile
integer, intent(in) :: LBi, UBi, LBj, UBj
integer, intent(in) :: IminS, ImaxS, JminS, JmaxS
integer, intent(in) :: krhs, kstp, kout
!
# ifdef ASSUMED_SHAPE
real(r8), intent(in) :: ubar(LBi:,LBj:,:)
real(r8), intent(in) :: vbar(LBi:,LBj:,:)
real(r8), intent(in) :: zeta(LBi:,LBj:,:)
real(r8), intent(in) :: tl_ubar(LBi:,LBj:,:)
real(r8), intent(in) :: tl_zeta(LBi:,LBj:,:)
real(r8), intent(inout) :: tl_vbar(LBi:,LBj:,:)
# else
real(r8), intent(in) :: ubar(LBi:UBi,LBj:UBj,:)
real(r8), intent(in) :: vbar(LBi:UBi,LBj:UBj,:)
real(r8), intent(in) :: zeta(LBi:UBi,LBj:UBj,:)
real(r8), intent(in) :: tl_ubar(LBi:UBi,LBj:UBj,:)
real(r8), intent(in) :: tl_zeta(LBi:UBi,LBj:UBj,:)
real(r8), intent(inout) :: tl_vbar(LBi:UBi,LBj:UBj,:)
# endif
!
! Local variable declarations.
!
integer :: Jmin, Jmax
integer :: i, j, know
real(r8) :: Ce, Cx, Ze
real(r8) :: bry_pgr, bry_cor, bry_str
real(r8) :: cff, cff1, cff2, cff3, dt2d
real(r8) :: obc_in, obc_out, tau
# if defined ATM_PRESS && defined PRESS_COMPENSATE
real(r8) :: OneAtm, fac
# endif
real(r8) :: tl_Ce, tl_Cx, tl_Ze
real(r8) :: tl_bry_pgr, tl_bry_cor, tl_bry_str, tl_bry_val
real(r8) :: tl_cff, tl_cff1, tl_cff2, tl_cff3
real(r8), dimension(IminS:ImaxS,JminS:JmaxS) :: tl_grad
# include "set_bounds.h"
!
!-----------------------------------------------------------------------
! Set time-indices
!-----------------------------------------------------------------------
!
IF (FIRST_2D_STEP) THEN
know=krhs
dt2d=dtfast(ng)
ELSE IF (PREDICTOR_2D_STEP(ng)) THEN
know=krhs
dt2d=2.0_r8*dtfast(ng)
ELSE
know=kstp
dt2d=dtfast(ng)
END IF
# if defined ATM_PRESS && defined PRESS_COMPENSATE
OneAtm=1013.25_r8 ! 1 atm = 1013.25 mb
fac=100.0_r8/(g*rho0)
# endif
!
!-----------------------------------------------------------------------
! Lateral boundary conditions at the southern edge.
!-----------------------------------------------------------------------
!
IF (DOMAIN(ng)%Southern_Edge(tile)) THEN
!
! Southern edge, implicit upstream radiation condition.
!
IF (tl_LBC(isouth,isVbar,ng)%radiation) THEN
IF (iic(ng).ne.0) THEN
DO i=Istr,Iend+1
!^ grad(i,Jstr)=vbar(i ,Jstr,know)- &
!^ & vbar(i-1,Jstr,know)
!^
tl_grad(i,Jstr)=0.0_r8
END DO
DO i=Istr,Iend
IF (LBC_apply(ng)%south(i)) THEN
# if defined CELERITY_READ && defined FORWARD_READ
IF (tl_LBC(isouth,isVbar,ng)%nudging) THEN
IF (LnudgeM2CLM(ng)) THEN
obc_out=0.5_r8* &
& (CLIMA(ng)%M2nudgcof(i,Jstr-1)+ &
& CLIMA(ng)%M2nudgcof(i,Jstr ))
obc_in =obcfac(ng)*obc_out
ELSE
obc_out=M2obc_out(ng,isouth)
obc_in =M2obc_in (ng,isouth)
END IF
IF (BOUNDARY(ng)%vbar_south_Ce(i).lt.0.0_r8) THEN
tau=obc_in
ELSE
tau=obc_out
END IF
tau=tau*dt2d
END IF
# ifdef RADIATION_2D
Cx=BOUNDARY(ng)%vbar_south_Cx(i)
# else
Cx=0.0_r8
# endif
Ce=BOUNDARY(ng)%vbar_south_Ce(i)
cff=BOUNDARY(ng)%vbar_south_C2(i)
# endif
!^ vbar(i,Jstr,kout)=(cff*vbar(i,Jstr ,know)+ &
!^ & Ce *vbar(i,Jstr+1,kout)- &
!^ & MAX(Cx,0.0_r8)*grad(i ,Jstr)- &
!^ & MIN(Cx,0.0_r8)*grad(i+1,Jstr))/ &
!^ & (cff+Ce)
!^
tl_vbar(i,Jstr,kout)=(cff*tl_vbar(i,Jstr ,know)+ &
& Ce *tl_vbar(i,Jstr+1,kout)- &
& MAX(Cx,0.0_r8)* &
& tl_grad(i ,Jstr)- &
& MIN(Cx,0.0_r8)* &
& tl_grad(i+1,Jstr))/ &
& (cff+Ce)
IF (tl_LBC(isouth,isVbar,ng)%nudging) THEN
!^ vbar(i,Jstr,kout)=vbar(i,Jstr,kout)+ &
!^ & tau*(BOUNDARY(ng)%vbar_south(i)- &
!^ & vbar(i,Jstr,know))
!^
tl_vbar(i,Jstr,kout)=tl_vbar(i,Jstr,kout)- &
& tau*tl_vbar(i,Jstr,know)
END IF
# ifdef MASKING
!^ vbar(i,Jstr,kout)=vbar(i,Jstr,kout)* &
!^ & GRID(ng)%vmask(i,Jstr)
!^
tl_vbar(i,Jstr,kout)=tl_vbar(i,Jstr,kout)* &
& GRID(ng)%vmask(i,Jstr)
# endif
END IF
END DO
END IF
!
! Southern edge, Flather boundary condition.
!
ELSE IF (tl_LBC(isouth,isVbar,ng)%Flather) THEN
DO i=Istr,Iend
IF (LBC_apply(ng)%south(i)) THEN
# if defined SSH_TIDES_NOT_YET && !defined UV_TIDES_NOT_YET
IF (tl_LBC(isouth,isFsur,ng)%acquire) THEN
bry_pgr=-g*(zeta(i,Jstr,know)- &
& BOUNDARY(ng)%zeta_south(i))* &
& 0.5_r8*GRID(ng)%pn(i,Jstr)
tl_bry_pgr=-g*tl_zeta(i,Jstr,know)* &
& 0.5_r8*GRID(ng)%pn(i,Jstr)
# ifdef ADJUST_BOUNDARY
IF (Lobc(isouth,isVbar,ng)) THEN
tl_bry_pgr=tl_bry_pgr+ &
& g*BOUNDARY(ng)%tl_zeta_south(i)* &
& 0.5_r8*GRID(ng)%pn(i,Jstr)
END IF
# endif
ELSE
bry_pgr=-g*(zeta(i,Jstr ,know)- &
& zeta(i,Jstr-1,know))* &
& 0.5_r8*(GRID(ng)%pn(i,Jstr-1)+ &
& GRID(ng)%pn(i,Jstr ))
tl_bry_pgr=-g*(tl_zeta(i,Jstr ,know)- &
& tl_zeta(i,Jstr-1,know))* &
& 0.5_r8*(GRID(ng)%pn(i,Jstr-1)+ &
& GRID(ng)%pn(i,Jstr ))
END IF
# ifdef UV_COR
bry_cor=-0.125_r8*(ubar(i ,Jstr-1,know)+ &
& ubar(i+1,Jstr-1,know)+ &
& ubar(i ,Jstr ,know)+ &
& ubar(i+1,Jstr ,know))* &
& (GRID(ng)%f(i,Jstr-1)+ &
& GRID(ng)%f(i,Jstr ))
tl_bry_cor=-0.125_r8*(tl_ubar(i ,Jstr-1,know)+ &
& tl_ubar(i+1,Jstr-1,know)+ &
& tl_ubar(i ,Jstr ,know)+ &
& tl_ubar(i+1,Jstr ,know))* &
& (GRID(ng)%f(i,Jstr-1)+ &
& GRID(ng)%f(i,Jstr ))
# else
bry_cor=0.0_r8
tl_bry_cor=0.0_r8
# endif
cff1=1.0_r8/(0.5_r8*(GRID(ng)%h(i,Jstr-1)+ &
& zeta(i,Jstr-1,know)+ &
& GRID(ng)%h(i,Jstr )+ &
& zeta(i,Jstr ,know)))
tl_cff1=-cff1*cff1*(0.5_r8*(GRID(ng)%tl_h(i,Jstr-1)+ &
& tl_zeta(i,Jstr-1,know)+ &
& GRID(ng)%tl_h(i,Jstr )+ &
& tl_zeta(i,Jstr ,know)))
bry_str=cff1*(FORCES(ng)%svstr(i,Jstr)- &
& FORCES(ng)%bvstr(i,Jstr))
tl_bry_str=tl_cff1*(FORCES(ng)%svstr(i,Jstr)- &
& FORCES(ng)%bvstr(i,Jstr))+ &
& cff1*(FORCES(ng)%tl_svstr(i,Jstr)- &
& FORCES(ng)%tl_bvstr(i,Jstr))
Ce=1.0_r8/SQRT(g*0.5_r8*(GRID(ng)%h(i,Jstr-1)+ &
& zeta(i,Jstr-1,know)+ &
& GRID(ng)%h(i,Jstr )+ &
& zeta(i,Jstr ,know)))
tl_Ce=-Ce*Ce*Ce*0.25_r8*g*(GRID(ng)%tl_h(i,Jstr-1)+ &
& tl_zeta(i,Jstr-1,know)+ &
& GRID(ng)%tl_h(i,Jstr )+ &
& tl_zeta(i,Jstr ,know))
cff2=GRID(ng)%on_v(i,Jstr)*Ce
tl_cff2=GRID(ng)%on_v(i,Jstr)*tl_Ce
!^ bry_val=vbar(i,Jstr+1,know)+ &
!^ & cff2*(bry_pgr+ &
!^ & bry_cor+ &
!^ & bry_str)
!^
tl_bry_val=tl_vbar(i,Jstr+1,know)+ &
& tl_cff2*(bry_pgr+ &
& bry_cor+ &
& bry_str)+ &
& cff2*(tl_bry_pgr+ &
& tl_bry_cor+ &
& tl_bry_str)
# else
!^ bry_val=BOUNDARY(ng)%vbar_south(i)
!^
# ifdef ADJUST_BOUNDARY
IF (Lobc(isouth,isVbar,ng)) THEN
tl_bry_val=BOUNDARY(ng)%tl_vbar_south(i)
ELSE
tl_bry_val=0.0_r8
END IF
# else
tl_bry_val=0.0_r8
# endif
# endif
cff=1.0_r8/(0.5_r8*(GRID(ng)%h(i,Jstr-1)+ &
& zeta(i,Jstr-1,know)+ &
& GRID(ng)%h(i,Jstr )+ &
& zeta(i,Jstr ,know)))
tl_cff=-cff*cff*(0.5_r8*(GRID(ng)%tl_h(i,Jstr-1)+ &
& tl_zeta(i,Jstr-1,know)+ &
& GRID(ng)%tl_h(i,Jstr )+ &
& tl_zeta(i,Jstr ,know)))
Ce=SQRT(g*cff)
tl_Ce=0.5_r8*g*tl_cff/Ce
# if defined ATM_PRESS && defined PRESS_COMPENSATE
!^ vbar(i,Jstr,kout)=bry_val- &
!^ & Ce*(0.5_r8* &
!^ & (zeta(i,Jstr-1,know)+ &
!^ & zeta(i,Jstr ,know)+ &
!^ & fac*(FORCES(ng)%Pair(i,Jstr-1)+ &
!^ & FORCES(ng)%Pair(i,Jstr )- &
!^ & 2.0_r8*OneAtm))- &
!^ & BOUNDARY(ng)%zeta_south(i))
!^
tl_vbar(i,Jstr,kout)=tl_bry_val- &
& tl_Ce* &
& (0.5_r8* &
& (zeta(i,Jstr-1,know)+ &
& zeta(i,Jstr ,know)+ &
& fac*(FORCES(ng)%Pair(i,Jstr-1)+ &
& FORCES(ng)%Pair(i,Jstr )- &
& 2.0_r8*OneAtm))- &
& BOUNDARY(ng)%zeta_south(i))- &
& Ce* &
& (0.5_r8*(tl_zeta(i,Jstr-1,know)+ &
& tl_zeta(i,Jstr ,know)))
# else
!^ vbar(i,Jstr,kout)=bry_val- &
!^ & Ce*(0.5_r8*(zeta(i,Jstr-1,know)+ &
!^ & zeta(i,Jstr ,know))- &
!^ & BOUNDARY(ng)%zeta_south(i))
!^
tl_vbar(i,Jstr,kout)=tl_bry_val- &
& tl_Ce* &
& (0.5_r8*(zeta(i,Jstr-1,know)+ &
& zeta(i,Jstr ,know))- &
& BOUNDARY(ng)%zeta_south(i))- &
& Ce* &
& (0.5_r8*(tl_zeta(i,Jstr-1,know)+ &
& tl_zeta(i,Jstr ,know)))
# endif
# ifdef ADJUST_BOUNDARY
IF (Lobc(isouth,isVbar,ng)) THEN
tl_vbar(i,Jstr,kout)=tl_vbar(i,Jstr,kout)+ &
& Ce*BOUNDARY(ng)%tl_zeta_south(i)
END IF
# endif
# ifdef MASKING
!^ vbar(i,Jstr,kout)=vbar(i,Jstr,kout)* &
!^ & GRID(ng)%vmask(i,Jstr)
!^
tl_vbar(i,Jstr,kout)=tl_vbar(i,Jstr,kout)* &
& GRID(ng)%vmask(i,Jstr)
# endif
END IF
END DO
!
! Southern edge, Shchepetkin boundary condition (Maison et al., 2010).
!
ELSE IF (tl_LBC(isouth,isVbar,ng)%Shchepetkin) THEN
DO i=Istr,Iend
IF (LBC_apply(ng)%south(i)) THEN
# if defined SSH_TIDES_NOT_YET && !defined UV_TIDES_NOT_YET
IF (tl_LBC(isouth,isFsur,ng)%acquire) THEN
bry_pgr=-g*(zeta(i,Jstr,know)- &
& BOUNDARY(ng)%zeta_south(i))* &
& 0.5_r8*GRID(ng)%pn(i,Jstr)
tl_bry_pgr=-g*tl_zeta(i,Jstr,know)* &
& 0.5_r8*GRID(ng)%pn(i,Jstr)
# ifdef ADJUST_BOUNDARY
IF (Lobc(isouth,isVbar,ng)) THEN
tl_bry_pgr=tl_bry_pgr+ &
& g*BOUNDARY(ng)%tl_zeta_south(i)* &
& 0.5_r8*GRID(ng)%pn(i,Jstr)
END IF
# endif
ELSE
bry_pgr=-g*(zeta(i,Jstr ,know)- &
& zeta(i,Jstr-1,know))* &
& 0.5_r8*(GRID(ng)%pn(i,Jstr-1)+ &
& GRID(ng)%pn(i,Jstr ))
tl_bry_pgr=-g*(tl_zeta(i,Jstr ,know)- &
& tl_zeta(i,Jstr-1,know))* &
& 0.5_r8*(GRID(ng)%pn(i,Jstr-1)+ &
& GRID(ng)%pn(i,Jstr ))
END IF
# ifdef UV_COR
bry_cor=-0.125_r8*(ubar(i ,Jstr-1,know)+ &
& ubar(i+1,Jstr-1,know)+ &
& ubar(i ,Jstr ,know)+ &
& ubar(i+1,Jstr ,know))* &
& (GRID(ng)%f(i,Jstr-1)+ &
& GRID(ng)%f(i,Jstr ))
tl_bry_cor=-0.125_r8*(tl_ubar(i ,Jstr-1,know)+ &
& tl_ubar(i+1,Jstr-1,know)+ &
& tl_ubar(i ,Jstr ,know)+ &
& tl_ubar(i+1,Jstr ,know))* &
& (GRID(ng)%f(i,Jstr-1)+ &
& GRID(ng)%f(i,Jstr ))
# else
bry_cor=0.0_r8
tl_bry_cor=0.0_r8
# endif
cff1=1.0_r8/(0.5_r8*(GRID(ng)%h(i,Jstr-1)+ &
& zeta(i,Jstr-1,know)+ &
& GRID(ng)%h(i,Jstr )+ &
& zeta(i,Jstr ,know)))
tl_cff1=-cff1*cff1*(0.5_r8*(GRID(ng)%tl_h(i,Jstr-1)+ &
& tl_zeta(i,Jstr-1,know)+ &
& GRID(ng)%tl_h(i,Jstr )+ &
& tl_zeta(i,Jstr ,know)))
bry_str=cff1*(FORCES(ng)%svstr(i,Jstr)- &
& FORCES(ng)%bvstr(i,Jstr))
tl_bry_str=tl_cff1*(FORCES(ng)%svstr(i,Jstr)- &
& FORCES(ng)%bvstr(i,Jstr))+ &
& cff1*(FORCES(ng)%tl_svstr(i,Jstr)- &
& FORCES(ng)%tl_bvstr(i,Jstr))
Ce=1.0_r8/SQRT(g*0.5_r8*(GRID(ng)%h(i,Jstr-1)+ &
& zeta(i,Jstr-1,know)+ &
& GRID(ng)%h(i,Jstr )+ &
& zeta(i,Jstr ,know)))
tl_Ce=-Ce*Ce*Ce*0.25_r8*g*(GRID(ng)%tl_h(i,Jstr-1)+ &
& tl_zeta(i,Jstr-1,know)+ &
& GRID(ng)%tl_h(i,Jstr )+ &
& tl_zeta(i,Jstr ,know))
cff2=GRID(ng)%on_v(i,Jstr)*Ce
tl_cff2=GRID(ng)%on_v(i,Jstr)*tl_Ce
!^ bry_val=vbar(i,Jstr+1,know)+ &
!^ & cff2*(bry_pgr+ &
!^ & bry_cor+ &
!^ & bry_str)
!^
tl_bry_val=tl_vbar(i,Jstr+1,know)+ &
& tl_cff2*(bry_pgr+ &
& bry_cor+ &
& bry_str)+ &
& cff2*(tl_bry_pgr+ &
& tl_bry_cor+ &
& tl_bry_str)
# else
!^ bry_val=BOUNDARY(ng)%vbar_south(i)
!^
# ifdef ADJUST_BOUNDARY
IF (Lobc(isouth,isVbar,ng)) THEN
tl_bry_val=BOUNDARY(ng)%tl_vbar_south(i)
ELSE
tl_bry_val=0.0_r8
END IF
# else
tl_bry_val=0.0_r8
# endif
# endif
# ifdef WET_DRY_NOT_YET
cff=0.5_r8*(GRID(ng)%h(i,Jstr-1)+ &
& zeta(i,Jstr-1,know)+ &
& GRID(ng)%h(i,Jstr )+ &
& zeta(i,Jstr ,Know))
tl_cff=0.5_r8*(GRID(ng)%tl_h(i,Jstr-1)+ &
& tl_zeta(i,Jstr-1,know)+ &
& GRID(ng)%tl_h(i,Jstr )+ &
& tl_zeta(i,Jstr ,know))
# else
cff=0.5_r8*(GRID(ng)%h(i,Jstr-1)+ &
& GRID(ng)%h(i,Jstr ))
tl_cff=0.5_r8*(GRID(ng)%tl_h(i,Jstr-1)+ &
& GRID(ng)%tl_h(i,Jstr ))
# endif
cff1=SQRT(g/cff)
tl_cff1=-0.5_r8*cff1*tl_cff/cff
Ce=dt2d*cff1*cff*0.5_r8*(GRID(ng)%pn(i,Jstr-1)+ &
& GRID(ng)%pn(i,Jstr ))
tl_Ce=dt2d*0.5_r8*(GRID(ng)%pn(i,Jstr-1)+ &
& GRID(ng)%pn(i,Jstr ))* &
& (cff1*tl_cff+ &
& tl_cff1*cff)
Ze=(0.5_r8+Ce)*zeta(i,Jstr ,know)+ &
& (0.5_r8-Ce)*zeta(i,Jstr-1,know)
tl_Ze=(0.5_r8+Ce)*tl_zeta(i,Jstr ,know)+ &
& (0.5_r8-Ce)*tl_zeta(i,Jstr-1,know)+ &
& tl_Ce*(zeta(i,Jstr ,know)- &
& zeta(i,Jstr-1,know))
IF (Ce.gt.Co) THEN
cff2=(1.0_r8-Co/Ce)**2
tl_cff2=2.0_r8*cff2*Co*tl_Ce/(Ce*Ce)
cff3=zeta(i,Jstr,kout)+ &
& Ce*zeta(i,Jstr-1,know)- &
& (1.0_r8+Ce)*zeta(i,Jstr,know)
tl_cff3=tl_zeta(i,Jstr,kout)+ &
& Ce*tl_zeta(i,Jstr-1,know)+ &
& tl_Ce*(zeta(i,Jstr-1,know)+ &
& zeta(i,Jstr ,know))- &
& (1.0_r8+Ce)*tl_zeta(i,Jstr,know)
Ze=Ze+cff2*cff3
tl_Ze=tl_Ze+cff2*tl_cff3+ &
& tl_cff2*cff3
END IF
!^ vbar(i,Jstr,kout)=0.5_r8* &
!^ & ((1.0_r8-Ce)*vbar(i,Jstr,know)+ &
!^ & Ce*vbar(i,Jstr+1,know)+ &
!^ & bry_val- &
!^ & cff1*(Ze-BOUNDARY(ng)%zeta_south(i)))
!^
tl_vbar(i,Jstr,kout)=0.5_r8* &
& ((1.0_r8-Ce)* &
& tl_vbar(i,Jstr,know)- &
& tl_Ce*(vbar(i,Jstr ,know)- &
& vbar(i,Jstr+1,know))+ &
& Ce*tl_vbar(i,Jstr+1,know)+ &
& tl_bry_val- &
& tl_cff1* &
& (Ze-BOUNDARY(ng)%zeta_south(i))- &
& cff1*tl_Ze)
# ifdef ADJUST_BOUNDARY
IF (Lobc(isouth,isVbar,ng)) THEN
tl_vbar(i,Jstr,kout)=tl_vbar(i,Jstr,kout)+ &
& 0.5_r8*cff1* &
& BOUNDARY(ng)%tl_zeta_south(i)
END IF
# endif
# ifdef MASKING
!^ vbar(i,Jstr,kout)=vbar(i,Jstr,kout)* &
!^ & GRID(ng)%vmask(i,Jstr)
!^
tl_vbar(i,Jstr,kout)=tl_vbar(i,Jstr,kout)* &
& GRID(ng)%vmask(i,Jstr)
# endif
END IF
END DO
!
! Southern edge, clamped boundary condition.
!
ELSE IF (tl_LBC(isouth,isVbar,ng)%clamped) THEN
DO i=Istr,Iend
IF (LBC_apply(ng)%south(i)) THEN
!^ vbar(i,Jstr,kout)=BOUNDARY(ng)%vbar_south(i)
!^
# ifdef ADJUST_BOUNDARY
IF (Lobc(isouth,isVbar,ng)) THEN
tl_vbar(i,Jstr,kout)=BOUNDARY(ng)%tl_vbar_south(i)
ELSE
tl_vbar(i,Jstr,kout)=0.0_r8
END IF
# else
tl_vbar(i,Jstr,kout)=0.0_r8
# endif
# ifdef MASKING
!^ vbar(i,Jstr,kout)=vbar(i,Jstr,kout)* &
!^ & GRID(ng)%vmask(i,Jstr)
!^
tl_vbar(i,Jstr,kout)=tl_vbar(i,Jstr,kout)* &
& GRID(ng)%vmask(i,Jstr)
# endif
END IF
END DO
!
! Southern edge, gradient boundary condition.
!
ELSE IF (tl_LBC(isouth,isVbar,ng)%gradient) THEN
DO i=Istr,Iend
IF (LBC_apply(ng)%south(i)) THEN
!^ vbar(i,Jstr,kout)=vbar(i,Jstr+1,kout)
!^
tl_vbar(i,Jstr,kout)=tl_vbar(i,Jstr+1,kout)
# ifdef MASKING
!^ vbar(i,Jstr,kout)=vbar(i,Jstr,kout)* &
!^ & GRID(ng)%vmask(i,Jstr)
!^
tl_vbar(i,Jstr,kout)=tl_vbar(i,Jstr,kout)* &
& GRID(ng)%vmask(i,Jstr)
# endif
END IF
END DO
!
! Southern edge, reduced-physics boundary condition.
!
ELSE IF (tl_LBC(isouth,isVbar,ng)%reduced) THEN
DO i=Istr,Iend
IF (LBC_apply(ng)%south(i)) THEN
IF (tl_LBC(isouth,isFsur,ng)%acquire) THEN
!^ bry_pgr=-g*(zeta(i,Jstr,know)- &
!^ & BOUNDARY(ng)%zeta_south(i))* &
!^ & 0.5_r8*GRID(ng)%pn(i,Jstr)
!^
tl_bry_pgr=-g*tl_zeta(i,Jstr,know)* &
& 0.5_r8*GRID(ng)%pn(i,Jstr)
# ifdef ADJUST_BOUNDARY
IF (Lobc(inorth,isVbar,ng)) THEN
tl_bry_pgr=tl_bry_pgr+ &
& g*BOUNDARY(ng)%tl_zeta_south(i)* &
& 0.5_r8*GRID(ng)%pn(i,Jstr)
END IF
# endif
ELSE
!^ bry_pgr=-g*(zeta(i,Jstr,know)- &
!^ & zeta(i,Jstr-1,know))* &
!^ & 0.5_r8*(GRID(ng)%pn(i,Jstr-1)+ &
!^ & GRID(ng)%pn(i,Jstr ))
!^
tl_bry_pgr=-g*(tl_zeta(i,Jstr ,know)- &
& tl_zeta(i,Jstr-1,know))* &
& 0.5_r8*(GRID(ng)%pn(i,Jstr-1)+ &
& GRID(ng)%pn(i,Jstr ))
END IF
# ifdef UV_COR
!^ bry_cor=-0.125_r8*(ubar(i ,Jstr-1,know)+ &
!^ & ubar(i+1,Jstr-1,know)+ &
!^ & ubar(i ,Jstr ,know)+ &
!^ & ubar(i+1,Jstr ,know))* &
!^ & (GRID(ng)%f(i,Jstr-1)+ &
!^ & GRID(ng)%f(i,Jstr ))
!^
tl_bry_cor=-0.125_r8*(tl_ubar(i ,Jstr-1,know)+ &
& tl_ubar(i+1,Jstr-1,know)+ &
& tl_ubar(i ,Jstr ,know)+ &
& tl_ubar(i+1,Jstr ,know))* &
& (GRID(ng)%f(i,Jstr-1)+ &
& GRID(ng)%f(i,Jstr ))
# else
!^ bry_cor=0.0_r8
!^
tl_bry_cor=0.0_r8
# endif
cff=1.0_r8/(0.5_r8*(GRID(ng)%h(i,Jstr-1)+ &
& zeta(i,Jstr-1,know)+ &
& GRID(ng)%h(i,Jstr )+ &
& zeta(i,Jstr ,know)))
tl_cff=-cff*cff*0.5_r8*(GRID(ng)%tl_h(i,Jstr-1)+ &
& tl_zeta(i,Jstr-1,know)+ &
& GRID(ng)%tl_h(i,Jstr )+ &
& tl_zeta(i,Jstr ,know))
!^ bry_str=cff*(FORCES(ng)%svstr(i,Jstr)- &
!^ & FORCES(ng)%bvstr(i,Jstr))
!^
tl_bry_str=tl_cff*(FORCES(ng)%svstr(i,Jstr)- &
& FORCES(ng)%bvstr(i,Jstr))+ &
& cff*(FORCES(ng)%tl_svstr(i,Jstr)- &
& FORCES(ng)%tl_bvstr(i,Jstr))
!^ vbar(i,Jstr,kout)=vbar(i,Jstr,know)+ &
!^ & dt2d*(bry_pgr+ &
!^ & bry_cor+ &
!^ & bry_str)
!^
tl_vbar(i,Jstr,kout)=tl_vbar(i,Jstr,know)+ &
& dt2d*(tl_bry_pgr+ &
& tl_bry_cor+ &
& tl_bry_str)
# ifdef MASKING
!^ vbar(i,Jstr,kout)=vbar(i,Jstr,kout)* &
!^ & GRID(ng)%vmask(i,Jstr)
!^
tl_vbar(i,Jstr,kout)=tl_vbar(i,Jstr,kout)* &
& GRID(ng)%vmask(i,Jstr)
# endif
END IF
END DO
!
! Southern edge, closed boundary condition.
!
ELSE IF (tl_LBC(isouth,isVbar,ng)%closed) THEN
DO i=Istr,Iend
IF (LBC_apply(ng)%south(i)) THEN
!^ vbar(i,Jstr,kout)=0.0_r8
!^
tl_vbar(i,Jstr,kout)=0.0_r8
END IF
END DO
END IF
END IF
!
!-----------------------------------------------------------------------
! Lateral boundary conditions at the northern edge.
!-----------------------------------------------------------------------
!
IF (DOMAIN(ng)%Northern_Edge(tile)) THEN
!
! Northern edge, implicit upstream radiation condition.
!
IF (tl_LBC(inorth,isVbar,ng)%radiation) THEN
IF (iic(ng).ne.0) THEN
DO i=Istr,Iend+1
!^ grad(i,Jend+1)=vbar(i ,Jend+1,know)- &
!^ & vbar(i-1,Jend+1,know)
!^
tl_grad(i,Jend+1)=0.0_r8
END DO
DO i=Istr,Iend
IF (LBC_apply(ng)%north(i)) THEN
# if defined CELERITY_READ && defined FORWARD_READ
IF (tl_LBC(inorth,isVbar,ng)%nudging) THEN
IF (LnudgeM2CLM(ng)) THEN
obc_out=0.5_r8* &
& (CLIMA(ng)%M2nudgcof(i,Jend )+ &
& CLIMA(ng)%M2nudgcof(i,Jend+1))
obc_in =obcfac(ng)*obc_out
ELSE
obc_out=M2obc_out(ng,inorth)
obc_in =M2obc_in (ng,inorth)
END IF
IF (BOUNDARY(ng)%vbar_north_Ce(i).lt.0.0_r8) THEN
tau=obc_in
ELSE
tau=obc_out
END IF
tau=tau*dt2d
END IF
# ifdef RADIATION_2D
Cx=BOUNDARY(ng)%vbar_north_Cx(i)
# else
Cx=0.0_r8
# endif
Ce=BOUNDARY(ng)%vbar_north_Ce(i)
cff=BOUNDARY(ng)%vbar_north_C2(i)
# endif
!^ vbar(i,Jend+1,kout)=(cff*vbar(i,Jend+1,know)+ &
!^ & Ce *vbar(i,Jend ,kout)- &
!^ & MAX(Cx,0.0_r8)*grad(i ,Jend+1)- &
!^ & MIN(Cx,0.0_r8)*grad(i+1,Jend+1))/ &
!^ & (cff+Ce)
!^
tl_vbar(i,Jend+1,kout)=(cff*tl_vbar(i,Jend+1,know)+ &
& Ce *tl_vbar(i,Jend ,kout)- &
& MAX(Cx,0.0_r8)* &
& tl_grad(i ,Jend+1)- &
& MIN(Cx,0.0_r8)* &
& tl_grad(i+1,Jend+1))/ &
& (cff+Ce)
IF (tl_LBC(inorth,isVbar,ng)%nudging) THEN
!^ vbar(i,Jend+1,kout)=vbar(i,Jend+1,kout)+ &
!^ & tau*(BOUNDARY(ng)%vbar_north(i)- &
!^ & vbar(i,Jend+1,know))
!^
tl_vbar(i,Jend+1,kout)=tl_vbar(i,Jend+1,kout)- &
& tau*tl_vbar(i,Jend+1,know)
END IF
# ifdef MASKING
!^ vbar(i,Jend+1,kout)=vbar(i,Jend+1,kout)* &
!^ & GRID(ng)%vmask(i,Jend+1)
!^
tl_vbar(i,Jend+1,kout)=tl_vbar(i,Jend+1,kout)* &
& GRID(ng)%vmask(i,Jend+1)
# endif
END IF
END DO
END IF
!
! Northern edge, Flather boundary condition.
!
ELSE IF (tl_LBC(inorth,isVbar,ng)%Flather) THEN
DO i=Istr,Iend
IF (LBC_apply(ng)%north(i)) THEN
# if defined SSH_TIDES_NOT_YET && !defined UV_TIDES_NOT_YET
IF (tl_LBC(inorth,isFsur,ng)%acquire) THEN
bry_pgr=-g*(BOUNDARY(ng)%zeta_north(i)- &
& zeta(i,Jend,know))* &
& 0.5_r8*GRID(ng)%pn(i,Jend)
tl_bry_pgr=g*tl_zeta(i,Jend,know)* &
& 0.5_r8*GRID(ng)%pn(i,Jend)
# ifdef ADJUST_BOUNDARY
IF (Lobc(inorth,isVbar,ng)) THEN
tl_bry_pgr=tl_bry_pgr- &
& g*BOUNDARY(ng)%tl_zeta_north(i)* &
& 0.5_r8*GRID(ng)%pn(i,Jend)
END IF
# endif
ELSE
bry_pgr=-g*(zeta(i,Jend+1,know)- &
& zeta(i,Jend ,know))* &
& 0.5_r8*(GRID(ng)%pn(i,Jend )+ &
& GRID(ng)%pn(i,Jend+1))
tl_bry_pgr=-g*(tl_zeta(i,Jend+1,know)- &
& tl_zeta(i,Jend ,know))* &
& 0.5_r8*(GRID(ng)%pn(i,Jend )+ &
& GRID(ng)%pn(i,Jend+1))
END IF
# ifdef UV_COR
bry_cor=-0.125_r8*(ubar(i ,Jend ,know)+ &
& ubar(i+1,Jend ,know)+ &
& ubar(i ,Jend+1,know)+ &
& ubar(i+1,Jend+1,know))* &
& (GRID(ng)%f(i,Jend )+ &
& GRID(ng)%f(i,Jend+1))
tl_bry_cor=-0.125_r8*(tl_ubar(i ,Jend ,know)+ &
& tl_ubar(i+1,Jend ,know)+ &
& tl_ubar(i ,Jend+1,know)+ &
& tl_ubar(i+1,Jend+1,know))* &
& (GRID(ng)%f(i,Jend )+ &
& GRID(ng)%f(i,Jend+1))
# else
bry_cor=0.0_r8
tl_bry_cor=0.0_r8
# endif
cff1=1.0_r8/(0.5_r8*(GRID(ng)%h(i,Jend )+ &
& zeta(i,Jend ,know)+ &
& GRID(ng)%h(i,Jend+1)+ &
& zeta(i,Jend+1,know)))
tl_cff1=-cff1*cff1*0.5_r8*(GRID(ng)%tl_h(i,Jend )+ &
& tl_zeta(i,Jend ,know)+ &
& GRID(ng)%tl_h(i,Jend+1)+ &
& tl_zeta(i,Jend+1,know))
bry_str=cff1*(FORCES(ng)%svstr(i,Jend+1)- &
& FORCES(ng)%bvstr(i,Jend+1))
tl_bry_str=tl_cff1*(FORCES(ng)%svstr(i,Jend+1)- &
& FORCES(ng)%bvstr(i,Jend+1))+ &
& cff1*(FORCES(ng)%tl_svstr(i,Jend+1)- &
& FORCES(ng)%tl_bvstr(i,Jend+1))
Ce=1.0_r8/SQRT(g*0.5_r8*(GRID(ng)%h(i,Jend+1)+ &
& zeta(i,Jend+1,know)+ &
& GRID(ng)%h(i,Jend )+ &
& zeta(i,Jend ,know)))
tl_Ce=-Ce*Ce*Ce*0.25_r8*g*(GRID(ng)%tl_h(i,Jend+1)+ &
& tl_zeta(i,Jend+1,know)+ &
& GRID(ng)%tl_h(i,Jend )+ &
& tl_zeta(i,Jend ,know))
cff2=GRID(ng)%on_v(i,Jend+1)*Ce
tl_cff2=GRID(ng)%on_v(i,Jend+1)*tl_Ce
!^ bry_val=vbar(i,Jend,know)+ &
!^ & cff2*(bry_pgr+ &
!^ & bry_cor+ &
!^ & bry_str)
!^
tl_bry_val=tl_vbar(i,Jend,know)+ &
& tl_cff2*(bry_pgr+ &
& bry_cor+ &
& bry_str)+ &
& cff2*(tl_bry_pgr+ &
& tl_bry_cor+ &
& tl_bry_str)
# else
!^ bry_val=BOUNDARY(ng)%vbar_north(i)
!^
# ifdef ADJUST_BOUNDARY
IF (Lobc(inorth,isVbar,ng)) THEN
tl_bry_val=BOUNDARY(ng)%tl_vbar_north(i)
ELSE
tl_bry_val=0.0_r8
END IF
# else
tl_bry_val=0.0_r8
# endif
# endif
cff=1.0_r8/(0.5_r8*(GRID(ng)%h(i,Jend )+ &
& zeta(i,Jend ,know)+ &
& GRID(ng)%h(i,Jend+1)+ &
& zeta(i,Jend+1,know)))
tl_cff=-cff*cff*(0.5_r8*(GRID(ng)%tl_h(i,Jend )+ &
& tl_zeta(i,Jend ,know)+ &
& GRID(ng)%tl_h(i,Jend+1)+ &
& tl_zeta(i,Jend+1,know)))
Ce=SQRT(g*cff)
tl_Ce=0.5_r8*g*tl_cff/Ce
# if defined ATM_PRESS && defined PRESS_COMPENSATE
!^ vbar(i,Jend+1,kout)=bry_val+ &
!^ & Ce*(0.5_r8* &
!^ & (zeta(i,Jend ,know)+ &
!^ & zeta(i,Jend+1,know)+ &
!^ & fac*(FORCES(ng)%Pair(i,Jend )+ &
!^ & FORCES(ng)%Pair(i,Jend+1)- &
!^ & 2.0_r8*OneAtm))- &
!^ & BOUNDARY(ng)%zeta_north(i))
!^
tl_vbar(i,Jend+1,kout)=tl_bry_val+ &
& tl_Ce* &
& (0.5_r8* &
& (zeta(i,Jend ,know)+ &
& zeta(i,Jend+1,know)+ &
& fac*(FORCES(ng)%Pair(i,Jend )+ &
& FORCES(ng)%Pair(i,Jend+1)- &
& 2.0_r8*OneAtm))- &
& BOUNDARY(ng)%zeta_north(i))+ &
& Ce* &
& (0.5_r8*(tl_zeta(i,Jend ,know)+ &
& tl_zeta(i,Jend+1,know)))
# else
!^ vbar(i,Jend+1,kout)=bry_val+ &
!^ & Ce*(0.5_r8*(zeta(i,Jend ,know)+ &
!^ & zeta(i,Jend+1,know))- &
!^ & BOUNDARY(ng)%zeta_north(i))
!^
tl_vbar(i,Jend+1,kout)=tl_bry_val+ &
& tl_Ce* &
& (0.5_r8*(zeta(i,Jend ,know)+ &
& zeta(i,Jend+1,know))- &
& BOUNDARY(ng)%zeta_north(i))+ &
& Ce* &
& (0.5_r8*(tl_zeta(i,Jend ,know)+ &
& tl_zeta(i,Jend+1,know)))
# endif
# ifdef ADJUST_BOUNDARY
IF (Lobc(inorth,isVbar,ng)) THEN
tl_vbar(i,Jend+1,kout)=tl_vbar(i,Jend+1,kout)- &
& Ce*BOUNDARY(ng)%tl_zeta_north(i)
END IF
# endif
# ifdef MASKING
!^ vbar(i,Jend+1,kout)=vbar(i,Jend+1,kout)* &
!^ & GRID(ng)%vmask(i,Jend+1)
!^
tl_vbar(i,Jend+1,kout)=tl_vbar(i,Jend+1,kout)* &
& GRID(ng)%vmask(i,Jend+1)
# endif
END IF
END DO
!
! Northern edge, Shchepetkin boundary condition (Maison et al., 2010).
!
ELSE IF (LBC(inorth,isVbar,ng)%Shchepetkin) THEN
DO i=Istr,Iend
IF (LBC_apply(ng)%north(i)) THEN
# if defined SSH_TIDES_NOT_YET && !defined UV_TIDES_NOT_YET
IF (tl_LBC(inorth,isFsur,ng)%acquire) THEN
bry_pgr=-g*(BOUNDARY(ng)%zeta_north(i)- &
& zeta(i,Jend,know))* &
& 0.5_r8*GRID(ng)%pn(i,Jend)
tl_bry_pgr=g*tl_zeta(i,Jend,know)* &
& 0.5_r8*GRID(ng)%pn(i,Jend)
# ifdef ADJUST_BOUNDARY
IF (Lobc(inorth,isVbar,ng)) THEN
tl_bry_pgr=tl_bry_pgr- &
& g*BOUNDARY(ng)%tl_zeta_north(i)* &
& 0.5_r8*GRID(ng)%pn(i,Jend)
END IF
# endif
ELSE
bry_pgr=-g*(zeta(i,Jend+1,know)- &
& zeta(i,Jend ,know))* &
& 0.5_r8*(GRID(ng)%pn(i,Jend )+ &
& GRID(ng)%pn(i,Jend+1))
tl_bry_pgr=-g*(tl_zeta(i,Jend+1,know)- &
& tl_zeta(i,Jend ,know))* &
& 0.5_r8*(GRID(ng)%pn(i,Jend )+ &
& GRID(ng)%pn(i,Jend+1))
END IF
# ifdef UV_COR
bry_cor=-0.125_r8*(ubar(i ,Jend ,know)+ &
& ubar(i+1,Jend ,know)+ &
& ubar(i ,Jend+1,know)+ &
& ubar(i+1,Jend+1,know))* &
& (GRID(ng)%f(i,Jend )+ &
& GRID(ng)%f(i,Jend+1))
tl_bry_cor=-0.125_r8*(tl_ubar(i ,Jend ,know)+ &
& tl_ubar(i+1,Jend ,know)+ &
& tl_ubar(i ,Jend+1,know)+ &
& tl_ubar(i+1,Jend+1,know))* &
& (GRID(ng)%f(i,Jend )+ &
& GRID(ng)%f(i,Jend+1))
# else
bry_cor=0.0_r8
tl_bry_cor=0.0_r8
# endif
cff1=1.0_r8/(0.5_r8*(GRID(ng)%h(i,Jend )+ &
& zeta(i,Jend ,know)+ &
& GRID(ng)%h(i,Jend+1)+ &
& zeta(i,Jend+1,know)))
tl_cff1=-cff1*cff1*0.5_r8*(GRID(ng)%tl_h(i,Jend )+ &
& tl_zeta(i,Jend ,know)+ &
& GRID(ng)%tl_h(i,Jend+1)+ &
& tl_zeta(i,Jend+1,know))
bry_str=cff1*(FORCES(ng)%svstr(i,Jend+1)- &
& FORCES(ng)%bvstr(i,Jend+1))
tl_bry_str=tl_cff1*(FORCES(ng)%svstr(i,Jend+1)- &
& FORCES(ng)%bvstr(i,Jend+1))+ &
& cff1*(FORCES(ng)%tl_svstr(i,Jend+1)- &
& FORCES(ng)%tl_bvstr(i,Jend+1))
Ce=1.0_r8/SQRT(g*0.5_r8*(GRID(ng)%h(i,Jend+1)+ &
& zeta(i,Jend+1,know)+ &
& GRID(ng)%h(i,Jend )+ &
& zeta(i,Jend ,know)))
tl_Ce=-Ce*Ce*Ce*0.25_r8*g*(GRID(ng)%tl_h(i,Jend+1)+ &
& tl_zeta(i,Jend+1,know)+ &
& GRID(ng)%tl_h(i,Jend )+ &
& tl_zeta(i,Jend ,know))
cff2=GRID(ng)%on_v(i,Jend+1)*Ce
tl_cff2=GRID(ng)%on_v(i,Jend+1)*tl_Ce
!^ bry_val=vbar(i,Jend,know)+ &
!^ & cff2*(bry_pgr+ &
!^ & bry_cor+ &
!^ & bry_str)
!^
tl_bry_val=tl_vbar(i,Jend,know)+ &
& tl_cff2*(bry_pgr+ &
& bry_cor+ &
& bry_str)+ &
& cff2*(tl_bry_pgr+ &
& tl_bry_cor+ &
& tl_bry_str)
# else
!^ bry_val=BOUNDARY(ng)%vbar_north(i)
!^
# ifdef ADJUST_BOUNDARY
IF (Lobc(inorth,isVbar,ng)) THEN
tl_bry_val=BOUNDARY(ng)%tl_vbar_north(i)
ELSE
tl_bry_val=0.0_r8
END IF
# else
tl_bry_val=0.0_r8
# endif
# endif
# ifdef WET_DRY_NOT_YET
cff=0.5_r8*(GRID(ng)%h(i,Jend )+ &
& zeta(i,Jend ,know)+ &
& GRID(ng)%h(i,Jend+1)+ &
& zeta(i,Jend+1,know))
tl_cff=0.5_r8*(GRID(ng)%tl_h(i,Jend )+ &
& tl_zeta(i,Jend ,know)+ &
& GRID(ng)%tl_h(i,Jend+1)+ &
& tl_zeta(i,Jend+1,know))
# else
cff=0.5_r8*(GRID(ng)%h(i,Jend )+ &
& GRID(ng)%h(i,Jend+1))
tl_cff=0.5_r8*(GRID(ng)%tl_h(i,Jend )+ &
& GRID(ng)%tl_h(i,Jend+1))
# endif
cff1=SQRT(g/cff)
tl_cff1=-0.5_r8*cff1*tl_cff/cff
Ce=dt2d*cff1*cff*0.5_r8*(GRID(ng)%pn(i,Jend )+ &
& GRID(ng)%pn(i,Jend+1))
tl_Ce=dt2d*0.5_r8*(GRID(ng)%pn(i,Jend )+ &
& GRID(ng)%pn(i,Jend+1))* &
& (cff1*tl_cff+ &
& tl_cff1*cff)
Ze=(0.5_r8+Ce)*zeta(i,Jend ,know)+ &
& (0.5_r8-Ce)*zeta(i,Jend+1,know)
tl_Ze=(0.5_r8+Ce)*tl_zeta(i,Jend ,know)+ &
& (0.5_r8-Ce)*tl_zeta(i,Jend+1,know)+ &
& tl_Ce*(zeta(i,Jend ,know)- &
& zeta(i,Jend+1,know))
IF (Ce.gt.Co) THEN
cff2=(1.0_r8-Co/Ce)**2
tl_cff2=2.0_r8*cff2*Co*tl_Ce/(Ce*Ce)
cff3=zeta(i,Jend,kout)+ &
& Ce*zeta(i,Jend+1,know)- &
& (1.0_r8+Ce)*zeta(i,Jend,know)
tl_cff3=tl_zeta(i,Jend,kout)+ &
& Ce*tl_zeta(i,Jend+1,know)+ &
& tl_Ce*(zeta(i,Jend ,know)+ &
& zeta(i,Jend+1,know))- &
& (1.0_r8+Ce)*tl_zeta(i,Jend,know)
Ze=Ze+cff2*cff3
tl_Ze=tl_Ze+cff2*tl_cff3+ &
& tl_cff2*cff3
END IF
!^ vbar(i,Jend+1,kout)=0.5_r8* &
!^ & ((1.0_r8-Ce)*vbar(i,Jend+1,know)+ &
!^ & Ce*vbar(i,Jend,know)+ &
!^ & bry_val+ &
!^ & cff1*(Ze-BOUNDARY(ng)%zeta_north(i)))
!^
tl_vbar(i,Jend+1,kout)=0.5_r8* &
& ((1.0_r8-Ce)* &
& tl_vbar(i,Jend+1,know)+ &
& tl_Ce*(vbar(i,Jend ,know)- &
& vbar(i,Jend+1,know))+ &
& Ce*tl_vbar(i,Jend,know)+ &
& tl_bry_val+ &
& tl_cff1* &
& (Ze-BOUNDARY(ng)%zeta_north(i))- &
& cff1*tl_ze)
# ifdef ADJUST_BOUNDARY
IF (Lobc(inorth,isVbar,ng)) THEN
tl_vbar(i,Jend+1,kout)=tl_vbar(i,Jend+1,kout)- &
& 0.5_r8*cff1* &
& Ce*BOUNDARY(ng)%tl_zeta_north(i)
END IF
# endif
# ifdef MASKING
!^ vbar(i,Jend+1,kout)=vbar(i,Jend+1,kout)* &
!^ & GRID(ng)%vmask(i,Jend+1)
!^
tl_vbar(i,Jend+1,kout)=tl_vbar(i,Jend+1,kout)* &
& GRID(ng)%vmask(i,Jend+1)
# endif
END IF
END DO
!
! Northern edge, clamped boundary condition.
!
ELSE IF (tl_LBC(inorth,isVbar,ng)%clamped) THEN
DO i=Istr,Iend
IF (LBC_apply(ng)%north(i)) THEN
!^ vbar(i,Jend+1,kout)=BOUNDARY(ng)%vbar_north(i)
!^
# ifdef ADJUST_BOUNDARY
IF (Lobc(inorth,isVbar,ng)) THEN
tl_vbar(i,Jend+1,kout)=BOUNDARY(ng)%tl_vbar_north(i)
ELSE
tl_vbar(i,Jend+1,kout)=0.0_r8
END IF
# else
tl_vbar(i,Jend+1,kout)=0.0_r8
# endif
# ifdef MASKING
!^ vbar(i,Jend+1,kout)=vbar(i,Jend+1,kout)* &
!^ & GRID(ng)%vmask(i,Jend+1)
!^
tl_vbar(i,Jend+1,kout)=tl_vbar(i,Jend+1,kout)* &
& GRID(ng)%vmask(i,Jend+1)
# endif
END IF
END DO
!
! Northern edge, gradient boundary condition.
!
ELSE IF (tl_LBC(inorth,isVbar,ng)%gradient) THEN
DO i=Istr,Iend
IF (LBC_apply(ng)%north(i)) THEN
!^ vbar(i,Jend+1,kout)=vbar(i,Jend,kout)
!^
tl_vbar(i,Jend+1,kout)=tl_vbar(i,Jend,kout)
# ifdef MASKING
!^ vbar(i,Jend+1,kout)=vbar(i,Jend+1,kout)* &
!^ & GRID(ng)%vmask(i,Jend+1)
!^
tl_vbar(i,Jend+1,kout)=tl_vbar(i,Jend+1,kout)* &
& GRID(ng)%vmask(i,Jend+1)
# endif
END IF
END DO
!
! Northern edge, reduced-physics boundary condition.
!
ELSE IF (tl_LBC(inorth,isVbar,ng)%reduced) THEN
DO i=Istr,Iend
IF (LBC_apply(ng)%north(i)) THEN
IF (tl_LBC(inorth,isFsur,ng)%acquire) THEN
!^ bry_pgr=-g*(BOUNDARY(ng)%zeta_north(i)- &
!^ & zeta(i,Jend,know))* &
!^ & 0.5_r8*GRID(ng)%pn(i,Jend)
!^
tl_bry_pgr=g*tl_zeta(i,Jend,know)* &
& 0.5_r8*GRID(ng)%pn(i,Jend)
# ifdef ADJUST_BOUNDARY
IF (Lobc(inorth,isVbar,ng)) THEN
tl_bry_pgr=tl_bry_pgr- &
& g*BOUNDARY(ng)%tl_zeta_north(i)* &
& 0.5_r8*GRID(ng)%pn(i,Jend)
END IF
# endif
ELSE
!^ bry_pgr=-g*(zeta(i,Jend+1,know)- &
!^ & zeta(i,Jend ,know))* &
!^ & 0.5_r8*(GRID(ng)%pn(i,Jend )+ &
!^ & GRID(ng)%pn(i,Jend+1))
!^
tl_bry_pgr=-g*(tl_zeta(i,Jend+1,know)- &
& tl_zeta(i,Jend ,know))* &
& 0.5_r8*(GRID(ng)%pn(i,Jend )+ &
& GRID(ng)%pn(i,Jend+1))
END IF
# ifdef UV_COR
!^ bry_cor=-0.125_r8*(ubar(i ,Jend ,know)+ &
!^ & ubar(i+1,Jend ,know)+ &
!^ & ubar(i ,Jend+1,know)+ &
!^ & ubar(i+1,Jend+1,know))* &
!^ & (GRID(ng)%f(i,Jend )+ &
!^ & GRID(ng)%f(i,Jend+1))
!^
tl_bry_cor=-0.125_r8*(tl_ubar(i ,Jend ,know)+ &
& tl_ubar(i+1,Jend ,know)+ &
& tl_ubar(i ,Jend+1,know)+ &
& tl_ubar(i+1,Jend+1,know))* &
& (GRID(ng)%f(i,Jend )+ &
& GRID(ng)%f(i,Jend+1))
# else
!^ bry_cor=0.0_r8
!^
tl_bry_cor=0.0_r8
# endif
cff=1.0_r8/(0.5_r8*(GRID(ng)%h(i,Jend )+ &
& zeta(i,Jend ,know)+ &
& GRID(ng)%h(i,Jend+1)+ &
& zeta(i,Jend+1,know)))
tl_cff=-cff*cff*0.5_r8*(GRID(ng)%tl_h(i,Jend )+ &
& tl_zeta(i,Jend ,know)+ &
& GRID(ng)%tl_h(i,Jend+1)+ &
& tl_zeta(i,Jend+1,know))
!^ bry_str=cff*(FORCES(ng)%svstr(i,Jend+1)- &
!^ & FORCES(ng)%bvstr(i,Jend+1))
!^
tl_bry_str=tl_cff*(FORCES(ng)%svstr(i,Jend+1)- &
& FORCES(ng)%bvstr(i,Jend+1))+ &
& cff*(FORCES(ng)%tl_svstr(i,Jend+1)- &
& FORCES(ng)%tl_bvstr(i,Jend+1))
!^ vbar(i,Jend+1,kout)=vbar(i,Jend+1,know)+ &
!^ & dt2d*(bry_pgr+ &
!^ & bry_cor+ &
!^ & bry_str)
!^
tl_vbar(i,Jend+1,kout)=tl_vbar(i,Jend+1,know)+ &
& dt2d*(tl_bry_pgr+ &
& tl_bry_cor+ &
& tl_bry_str)
# ifdef MASKING
!^ vbar(i,Jend+1,kout)=vbar(i,Jend+1,kout)* &
!^ & GRID(ng)%vmask(i,Jend+1)
!^
tl_vbar(i,Jend+1,kout)=tl_vbar(i,Jend+1,kout)* &
& GRID(ng)%vmask(i,Jend+1)
# endif
END IF
END DO
!
! Northern edge, closed boundary condition.
!
ELSE IF (tl_LBC(inorth,isVbar,ng)%closed) THEN
DO i=Istr,Iend
IF (LBC_apply(ng)%north(i)) THEN
!^ vbar(i,Jend+1,kout)=0.0_r8
!^
tl_vbar(i,Jend+1,kout)=0.0_r8
END IF
END DO
END IF
END IF
!
!-----------------------------------------------------------------------
! Lateral boundary conditions at the western edge.
!-----------------------------------------------------------------------
!
IF (DOMAIN(ng)%Western_Edge(tile)) THEN
!
! Western edge, implicit upstream radiation condition.
!
IF (tl_LBC(iwest,isVbar,ng)%radiation) THEN
IF (iic(ng).ne.0) THEN
DO j=JstrV-1,Jend
!^ grad(Istr-1,j)=vbar(Istr-1,j+1,know)- &
!^ & vbar(Istr-1,j ,know)
!^
tl_grad(Istr-1,j)=0.0_r8
END DO
DO j=JstrV,Jend
IF (LBC_apply(ng)%west(j)) THEN
# if defined CELERITY_READ && defined FORWARD_READ
IF (tl_LBC(iwest,isVbar,ng)%nudging) THEN
IF (LnudgeM2CLM(ng)) THEN
obc_out=0.5_r8* &
& (CLIMA(ng)%M2nudgcof(Istr-1,j-1)+ &
& CLIMA(ng)%M2nudgcof(Istr-1,j ))
obc_in =obcfac(ng)*obc_out
ELSE
obc_out=M2obc_out(ng,iwest)
obc_in =M2obc_in (ng,iwest)
END IF
IF (BOUNDARY(ng)%vbar_west_Cx(j).lt.0.0_r8) THEN
tau=obc_in
ELSE
tau=obc_out
END IF
tau=tau*dt2d
END IF
Cx=BOUNDARY(ng)%vbar_west_Cx(j)
# ifdef RADIATION_2D
Ce=BOUNDARY(ng)%vbar_west_Ce(j)
# else
Ce=0.0_r8
# endif
cff=BOUNDARY(ng)%vbar_west_C2(j)
# endif
!^ vbar(Istr-1,j,kout)=(cff*vbar(Istr-1,j,know)+ &
!^ & Cx *vbar(Istr ,j,kout)- &
!^ & MAX(Ce,0.0_r8)*grad(Istr-1,j-1)- &
!^ & MIN(Ce,0.0_r8)*grad(Istr-1,j ))/ &
!^ & (cff+Cx)
!^
tl_vbar(Istr-1,j,kout)=(cff*tl_vbar(Istr-1,j,know)+ &
& Cx *tl_vbar(1,j,kout)- &
& MAX(Ce,0.0_r8)* &
& tl_grad(Istr-1,j-1)- &
& MIN(Ce,0.0_r8)* &
& tl_grad(Istr-1,j ))/ &
& (cff+Cx)
IF (tl_LBC(iwest,isVbar,ng)%nudging) THEN
!^ vbar(Istr-1,j,kout)=vbar(Istr-1,j,kout)+ &
!^ & tau*(BOUNDARY(ng)%vbar_west(j)- &
!^ & vbar(Istr-1,j,know))
!^
tl_vbar(Istr-1,j,kout)=tl_vbar(Istr-1,j,kout)- &
& tau*tl_vbar(1,j,know)
END IF
# ifdef MASKING
!^ vbar(Istr-1,j,kout)=vbar(Istr-1,j,kout)* &
!^ & GRID(ng)%vmask(Istr-1,j)
!^
tl_vbar(Istr-1,j,kout)=tl_vbar(Istr-1,j,kout)* &
& GRID(ng)%vmask(Istr-1,j)
# endif
END IF
END DO
END IF
!
! Western edge, Chapman boundary condition.
!
ELSE IF (tl_LBC(iwest,isVbar,ng)%Flather.or. &
& tl_LBC(iwest,isVbar,ng)%reduced.or. &
& tl_LBC(iwest,isVbar,ng)%Shchepetkin) THEN
DO j=JstrV,Jend
IF (LBC_apply(ng)%west(j)) THEN
cff=dt2d*0.5_r8*(GRID(ng)%pm(Istr,j-1)+ &
& GRID(ng)%pm(Istr,j ))
cff1=SQRT(g*0.5_r8*(GRID(ng)%h(Istr,j-1)+ &
& zeta(Istr,j-1,know)+ &
& GRID(ng)%h(Istr,j )+ &
& zeta(Istr,j ,know)))
tl_cff1=0.25_r8*g*(GRID(ng)%tl_h(Istr,j-1)+ &
& tl_zeta(Istr,j-1,know)+ &
& GRID(ng)%tl_h(Istr,j )+ &
& tl_zeta(Istr,j ,know))/cff1
Cx=cff*cff1
tl_Cx=cff*tl_cff1
cff2=1.0_r8/(1.0_r8+Cx)
tl_cff2=-cff2*cff2*tl_Cx
!^ vbar(Istr-1,j,kout)=cff2*(vbar(Istr-1,j,know)+ &
!^ & Cx*vbar(Istr,j,kout))
!^
tl_vbar(Istr-1,j,kout)=tl_cff2*(vbar(Istr-1,j,know)+ &
& Cx*vbar(Istr,j,kout))+ &
& cff2*(tl_vbar(Istr-1,j,know)+ &
& tl_Cx*vbar(Istr,j,kout)+ &
& Cx*tl_vbar(Istr,j,kout))
# ifdef MASKING
!^ vbar(Istr-1,j,kout)=vbar(Istr-1,j,kout)* &
!^ & GRID(ng)%vmask(Istr-1,j)
!^
tl_vbar(Istr-1,j,kout)=tl_vbar(Istr-1,j,kout)* &
& GRID(ng)%vmask(Istr-1,j)
# endif
END IF
END DO
!
! Western edge, clamped boundary condition.
!
ELSE IF (tl_LBC(iwest,isVbar,ng)%clamped) THEN
DO j=JstrV,Jend
IF (LBC_apply(ng)%west(j)) THEN
!^ vbar(Istr-1,j,kout)=BOUNDARY(ng)%vbar_west(j)
!^
# ifdef ADJUST_BOUNDARY
IF (Lobc(iwest,isVbar,ng)) THEN
tl_vbar(Istr-1,j,kout)=BOUNDARY(ng)%tl_vbar_west(j)
ELSE
tl_vbar(Istr-1,j,kout)=0.0_r8
END IF
# else
tl_vbar(Istr-1,j,kout)=0.0_r8
# endif
# ifdef MASKING
!^ vbar(Istr-1,j,kout)=vbar(Istr-1,j,kout)* &
!^ & GRID(ng)%vmask(Istr-1,j)
!^
tl_vbar(Istr-1,j,kout)=tl_vbar(Istr-1,j,kout)* &
& GRID(ng)%vmask(Istr-1,j)
# endif
END IF
END DO
!
! Western edge, gradient boundary condition.
!
ELSE IF (tl_LBC(iwest,isVbar,ng)%gradient) THEN
DO j=JstrV,Jend
IF (LBC_apply(ng)%west(j)) THEN
!^ vbar(Istr-1,j,kout)=vbar(Istr,j,kout)
!^
tl_vbar(Istr-1,j,kout)=tl_vbar(Istr,j,kout)
# ifdef MASKING
!^ vbar(Istr-1,j,kout)=vbar(Istr-1,j,kout)* &
!^ & GRID(ng)%vmask(Istr-1,j)
!^
tl_vbar(Istr-1,j,kout)=tl_vbar(Istr-1,j,kout)* &
& GRID(ng)%vmask(Istr-1,j)
# endif
END IF
END DO
!
! Western edge, closed boundary condition: free slip (gamma2=1) or
! no slip (gamma2=-1).
!
ELSE IF (tl_LBC(iwest,isVbar,ng)%closed) THEN
IF (NSperiodic(ng)) THEN
Jmin=JstrV
Jmax=Jend
ELSE
Jmin=Jstr
Jmax=JendR
END IF
DO j=Jmin,Jmax
IF (LBC_apply(ng)%west(j)) THEN
!^ vbar(Istr-1,j,kout)=gamma2(ng)*vbar(Istr,j,kout)
!^
tl_vbar(Istr-1,j,kout)=gamma2(ng)*tl_vbar(Istr,j,kout)
# ifdef MASKING
!^ vbar(Istr-1,j,kout)=vbar(Istr-1,j,kout)* &
!^ & GRID(ng)%vmask(Istr-1,j)
!^
tl_vbar(Istr-1,j,kout)=tl_vbar(Istr-1,j,kout)* &
& GRID(ng)%vmask(Istr-1,j)
# endif
END IF
END DO
END IF
END IF
!
!-----------------------------------------------------------------------
! Lateral boundary conditions at the eastern edge.
!-----------------------------------------------------------------------
!
IF (DOMAIN(ng)%Eastern_Edge(tile)) THEN
!
! Eastern edge, implicit upstream radiation condition.
!
IF (tl_LBC(ieast,isVbar,ng)%radiation) THEN
IF (iic(ng).ne.0) THEN
DO j=JstrV-1,Jend
!^ grad(Iend+1,j)=vbar(Iend+1,j+1,know)- &
!^ & vbar(Iend+1,j ,know)
!^
tl_grad(Iend+1,j)=0.0_r8
END DO
DO j=JstrV,Jend
IF (LBC_apply(ng)%east(j)) THEN
# if defined CELERITY_READ && defined FORWARD_READ
IF (tl_LBC(ieast,isVbar,ng)%nudging) THEN
IF (LnudgeM2CLM(ng)) THEN
obc_out=0.5_r8* &
& (CLIMA(ng)%M2nudgcof(Iend+1,j-1)+ &
& CLIMA(ng)%M2nudgcof(Iend+1,j ))
obc_in =obcfac(ng)*obc_out
ELSE
obc_out=M2obc_out(ng,ieast)
obc_in =M2obc_in (ng,ieast)
END IF
IF (BOUNDARY(ng)%vbar_east_Cx(j).lt.0.0_r8) THEN
tau=obc_in
ELSE
tau=obc_out
END IF
tau=tau*dt2d
END IF
Cx=BOUNDARY(ng)%vbar_east_Cx(j)
# ifdef RADIATION_2D
Ce=BOUNDARY(ng)%vbar_east_Ce(j)
# else
Ce=0.0_r8
# endif
cff=BOUNDARY(ng)%vbar_east_C2(j)
# endif
!^ vbar(Iend+1,j,kout)=(cff*vbar(Iend+1,j,know)+ &
!^ & Cx *vbar(Iend ,j,kout)- &
!^ & MAX(Ce,0.0_r8)*grad(Iend+1,j-1)- &
!^ & MIN(Ce,0.0_r8)*grad(Iend+1,j ))/ &
!^ & (cff+Cx)
!^
tl_vbar(Iend+1,j,kout)=(cff*tl_vbar(Iend+1,j,know)+ &
& Cx *tl_vbar(Iend ,j,kout)- &
& MAX(Ce,0.0_r8)* &
& tl_grad(Iend+1,j-1)- &
& MIN(Ce,0.0_r8)* &
& tl_grad(Iend+1,j ))/ &
& (cff+Cx)
IF (tl_LBC(ieast,isVbar,ng)%nudging) THEN
!^ vbar(Iend+1,j,kout)=vbar(Iend+1,j,kout)+ &
!^ & tau*(BOUNDARY(ng)%vbar_east(j)- &
!^ & vbar(Iend+1,j,know))
!^
tl_vbar(Iend+1,j,kout)=tl_vbar(Iend+1,j,kout)- &
& tau*tl_vbar(Iend+1,j,know)
END IF
# ifdef MASKING
!^ vbar(Iend+1,j,kout)=vbar(Iend+1,j,kout)* &
!^ & GRID(ng)%vmask(Iend+1,j)
!^
tl_vbar(Iend+1,j,kout)=tl_vbar(Iend+1,j,kout)* &
& GRID(ng)%vmask(Iend+1,j)
# endif
END IF
END DO
END IF
!
! Eastern edge, Chapman boundary condition.
!
ELSE IF (tl_LBC(ieast,isVbar,ng)%Flather.or. &
& tl_LBC(ieast,isVbar,ng)%reduced.or. &
& tl_LBC(ieast,isVbar,ng)%Shchepetkin) THEN
DO j=JstrV,Jend
IF (LBC_apply(ng)%east(j)) THEN
cff=dt2d*0.5_r8*(GRID(ng)%pm(Iend,j-1)+ &
& GRID(ng)%pm(Iend,j ))
cff1=SQRT(g*0.5_r8*(GRID(ng)%h(Iend,j-1)+ &
& zeta(Iend,j-1,know)+ &
& GRID(ng)%h(Iend,j )+ &
& zeta(Iend,j ,know)))
tl_cff1=0.25_r8*g*(GRID(ng)%tl_h(Iend,j-1)+ &
& tl_zeta(Iend,j-1,know)+ &
& GRID(ng)%tl_h(Iend,j )+ &
& tl_zeta(Iend,j ,know))/cff1
Cx=cff*cff1
tl_Cx=cff*tl_cff1
cff2=1.0_r8/(1.0_r8+Cx)
tl_cff2=-cff2*cff2*tl_Cx
!^ vbar(Iend+1,j,kout)=cff2*(vbar(Iend+1,j,know)+ &
!^ & Cx*vbar(Iend,j,kout))
!^
tl_vbar(Iend+1,j,kout)=tl_cff2*(vbar(Iend+1,j,know)+ &
& Cx*vbar(Iend,j,kout))+ &
& cff2*(tl_vbar(Iend+1,j,know)+ &
& tl_Cx*vbar(Iend,j,kout)+ &
& Cx*tl_vbar(Iend,j,kout))
# ifdef MASKING
!^ vbar(Iend+1,j,kout)=vbar(Iend+1,j,kout)* &
!^ & GRID(ng)%vmask(Iend+1,j)
!^
tl_vbar(Iend+1,j,kout)=tl_vbar(Iend+1,j,kout)* &
& GRID(ng)%vmask(Iend+1,j)
# endif
END IF
END DO
!
! Eastern edge, clamped boundary condition.
!
ELSE IF (tl_LBC(ieast,isVbar,ng)%clamped) THEN
DO j=JstrV,Jend
IF (LBC_apply(ng)%east(j)) THEN
!^ vbar(Iend+1,j,kout)=BOUNDARY(ng)%vbar_east(j)
!^
# ifdef ADJUST_BOUNDARY
IF (Lobc(ieast,isVbar,ng)) THEN
tl_vbar(Iend+1,j,kout)=BOUNDARY(ng)%tl_vbar_east(j)
ELSE
tl_vbar(Iend+1,j,kout)=0.0_r8
END IF
# else
tl_vbar(Iend+1,j,kout)=0.0_r8
# endif
# ifdef MASKING
!^ vbar(Iend+1,j,kout)=vbar(Iend+1,j,kout)* &
!^ & GRID(ng)%vmask(Iend+1,j)
!^
tl_vbar(Iend+1,j,kout)=tl_vbar(Iend+1,j,kout)* &
& GRID(ng)%vmask(Iend+1,j)
# endif
END IF
END DO
!
! Eastern edge, gradient boundary condition.
!
ELSE IF (tl_LBC(ieast,isVbar,ng)%gradient) THEN
DO j=JstrV,Jend
IF (LBC_apply(ng)%east(j)) THEN
!^ vbar(Iend+1,j,kout)=vbar(Iend,j,kout)
!^
tl_vbar(Iend+1,j,kout)=tl_vbar(Iend,j,kout)
# ifdef MASKING
!^ vbar(Iend+1,j,kout)=vbar(Iend+1,j,kout)* &
!^ & GRID(ng)%vmask(Iend+1,j)
!^
tl_vbar(Iend+1,j,kout)=tl_vbar(Iend+1,j,kout)* &
& GRID(ng)%vmask(Iend+1,j)
# endif
END IF
END DO
!
! Eastern edge, closed boundary condition: free slip (gamma2=1) or
! no slip (gamma2=-1).
!
ELSE IF (tl_LBC(ieast,isVbar,ng)%closed) THEN
IF (NSperiodic(ng)) THEN
Jmin=JstrV
Jmax=Jend
ELSE
Jmin=Jstr
Jmax=JendR
END IF
DO j=Jmin,Jmax
IF (LBC_apply(ng)%east(j)) THEN
!^ vbar(Iend+1,j,kout)=gamma2(ng)*vbar(Iend,j,kout)
!^
tl_vbar(Iend+1,j,kout)=gamma2(ng)*tl_vbar(Iend,j,kout)
# ifdef MASKING
!^ vbar(Iend+1,j,kout)=vbar(Iend+1,j,kout)* &
!^ & GRID(ng)%vmask(Iend+1,j)
!^
tl_vbar(Iend+1,j,kout)=tl_vbar(Iend+1,j,kout)* &
& GRID(ng)%vmask(Iend+1,j)
# endif
END IF
END DO
END IF
END IF
!
!-----------------------------------------------------------------------
! Boundary corners.
!-----------------------------------------------------------------------
!
IF (.not.(EWperiodic(ng).or.NSperiodic(ng))) THEN
IF (DOMAIN(ng)%SouthWest_Corner(tile)) THEN
IF (LBC_apply(ng)%south(Istr-1).and. &
& LBC_apply(ng)%west (Jstr )) THEN
!^ vbar(Istr-1,Jstr,kout)=0.5_r8*(vbar(Istr ,Jstr ,kout)+ &
!^ & vbar(Istr-1,Jstr+1,kout))
!^
tl_vbar(Istr-1,Jstr,kout)=0.5_r8* &
& (tl_vbar(Istr ,Jstr ,kout)+ &
& tl_vbar(Istr-1,Jstr+1,kout))
END IF
END IF
IF (DOMAIN(ng)%SouthEast_Corner(tile)) THEN
IF (LBC_apply(ng)%south(Iend+1).and. &
& LBC_apply(ng)%east (Jstr )) THEN
!^ vbar(Iend+1,Jstr,kout)=0.5_r8*(vbar(Iend ,Jstr ,kout)+ &
!^ & vbar(Iend+1,Jstr+1,kout))
!^
tl_vbar(Iend+1,Jstr,kout)=0.5_r8* &
& (tl_vbar(Iend ,Jstr ,kout)+ &
& tl_vbar(Iend+1,Jstr+1,kout))
END IF
END IF
IF (DOMAIN(ng)%NorthWest_Corner(tile)) THEN
IF (LBC_apply(ng)%north(Istr-1).and. &
& LBC_apply(ng)%west (Jend+1)) THEN
!^ vbar(Istr-1,Jend+1,kout)=0.5_r8*(vbar(Istr-1,Jend ,kout)+ &
!^ & vbar(Istr ,Jend+1,kout))
!^
tl_vbar(Istr-1,Jend+1,kout)=0.5_r8* &
& (tl_vbar(Istr-1,Jend ,kout)+ &
& tl_vbar(Istr ,Jend+1,kout))
END IF
END IF
IF (DOMAIN(ng)%NorthEast_Corner(tile)) THEN
IF (LBC_apply(ng)%north(Iend+1).and. &
& LBC_apply(ng)%east (Jend+1)) THEN
!^ vbar(Iend+1,Jend+1,kout)=0.5_r8*(vbar(Iend+1,Jend ,kout)+ &
!^ & vbar(Iend ,Jend+1,kout))
!^
tl_vbar(Iend+1,Jend+1,kout)=0.5_r8* &
& (tl_vbar(Iend+1,Jend ,kout)+ &
& tl_vbar(Iend ,Jend+1,kout))
END IF
END IF
END IF
# if defined WET_DRY_NOT_YET
!
!-----------------------------------------------------------------------
! Impose wetting and drying conditions.
!
! HGA: need TLM code here.
!-----------------------------------------------------------------------
!
IF (.not.EWperiodic(ng)) THEN
IF (DOMAIN(ng)%Western_Edge(tile)) THEN
DO j=JstrV,Jend
IF (LBC_apply(ng)%west(j).or. &
& LBC(iwest,isVbar,ng)%nested) THEN
!^ cff1=ABS(ABS(GRID(ng)%vmask_wet(Istr-1,j))-1.0_r8)
!^ cff2=0.5_r8+DSIGN(0.5_r8,vbar(Istr-1,j,kout))* &
!^ & GRID(ng)%vmask_wet(Istr-1,j)
!^ cff=0.5_r8*GRID(ng)%vmask_wet(Istr-1,j)*cff1+ &
!^ & cff2*(1.0_r8-cff1)
!^ vbar(Istr,j,kout)=vbar(Istr,j,kout)*cff
END IF
END DO
END IF
IF (DOMAIN(ng)%Eastern_Edge(tile)) THEN
DO j=JstrV,Jend
IF (LBC_apply(ng)%east(j).or. &
& LBC(ieast,isVbar,ng)%nested) THEN
!^ cff1=ABS(ABS(GRID(ng)%vmask_wet(Iend+1,j))-1.0_r8)
!^ cff2=0.5_r8+DSIGN(0.5_r8,vbar(Iend+1,j,kout))* &
!^ & GRID(ng)%vmask_wet(Iend+1,j)
!^ cff=0.5_r8*GRID(ng)%vmask_wet(Iend+1,j)*cff1+ &
!^ & cff2*(1.0_r8-cff1)
!^ vbar(Iend+1,j,kout)=vbar(Iend+1,j,kout)*cff
END IF
END DO
END IF
END IF
!
IF (.not.NSperiodic(ng)) THEN
IF (DOMAIN(ng)%Southern_Edge(tile)) THEN
DO i=Istr,Iend
IF (LBC_apply(ng)%south(i).or. &
& LBC(isouth,isVbar,ng)%nested) THEN
!^ cff1=ABS(ABS(GRID(ng)%vmask_wet(i,Jstr))-1.0_r8)
!^ cff2=0.5_r8+DSIGN(0.5_r8,vbar(i,Jstr,kout))* &
!^ & GRID(ng)%vmask_wet(i,Jstr)
!^ cff=0.5_r8*GRID(ng)%vmask_wet(i,Jstr)*cff1+ &
!^ & cff2*(1.0_r8-cff1)
!^ vbar(i,Jstr,kout)=vbar(i,Jstr,kout)*cff
END IF
END DO
END IF
IF (DOMAIN(ng)%Northern_Edge(tile)) THEN
DO i=Istr,Iend
IF (LBC_apply(ng)%north(i).or. &
& LBC(inorth,isVbar,ng)%nested) THEN
!^ cff1=ABS(ABS(GRID(ng)%vmask_wet(i,Jend+1))-1.0_r8)
!^ cff2=0.5_r8+DSIGN(0.5_r8,vbar(i,Jend+1,kout))* &
!^ & GRID(ng)%vmask_wet(i,Jend+1)
!^ cff=0.5_r8*GRID(ng)%vmask_wet(i,Jend+1)*cff1+ &
!^ & cff2*(1.0_r8-cff1)
!^ vbar(i,Jend+1,kout)=vbar(i,Jend+1,kout)*cff
END IF
END DO
END IF
END IF
!
IF (.not.(EWperiodic(ng).or.NSperiodic(ng))) THEN
IF (DOMAIN(ng)%SouthWest_Corner(tile)) THEN
IF ((LBC_apply(ng)%south(Istr-1).and. &
& LBC_apply(ng)%west (Jstr )).or. &
& (LBC(iwest,isVbar,ng)%nested.and. &
& LBC(isouth,isVbar,ng)%nested)) THEN
!^ cff1=ABS(ABS(GRID(ng)%vmask_wet(Istr-1,Jstr))-1.0_r8)
!^ cff2=0.5_r8+DSIGN(0.5_r8,vbar(Istr-1,Jstr,kout))* &
!^ & GRID(ng)%vmask_wet(Istr-1,Jstr)
!^ cff=0.5_r8*GRID(ng)%vmask_wet(Istr-1,Jstr)*cff1+ &
!^ & cff2*(1.0_r8-cff1)
!^ vbar(Istr-1,Jstr,kout)=vbar(Istr-1,Jstr,kout)*cff
END IF
END IF
IF (DOMAIN(ng)%SouthEast_Corner(tile)) THEN
IF ((LBC_apply(ng)%south(Iend+1).and. &
& LBC_apply(ng)%east (Jstr )).or. &
& (LBC(ieast,isVbar,ng)%nested.and. &
& LBC(isouth,isVbar,ng)%nested)) THEN
!^ cff1=ABS(ABS(GRID(ng)%vmask_wet(Iend+1,Jstr))-1.0_r8)
!^ cff2=0.5_r8+DSIGN(0.5_r8,vbar(Iend+1,Jstr,kout))* &
!^ & GRID(ng)%vmask_wet(Iend+1,Jstr)
!^ cff=0.5_r8*GRID(ng)%vmask_wet(Iend+1,Jstr)*cff1+ &
!^ & cff2*(1.0_r8-cff1)
!^ vbar(Iend+1,Jstr,kout)=vbar(Iend+1,Jstr,kout)*cff
END IF
END IF
IF (DOMAIN(ng)%NorthWest_Corner(tile)) THEN
IF ((LBC_apply(ng)%north(Istr-1).and. &
& LBC_apply(ng)%west (Jend+1)).or. &
& (LBC(iwest,isVbar,ng)%nested.and. &
& LBC(inorth,isVbar,ng)%nested)) THEN
!^ cff1=ABS(ABS(GRID(ng)%vmask_wet(Istr-1,Jend+1))-1.0_r8)
!^ cff2=0.5_r8+DSIGN(0.5_r8,vbar(Istr-1,Jend+1,kout))* &
!^ & GRID(ng)%vmask_wet(Istr-1,Jend+1)
!^ cff=0.5_r8*GRID(ng)%vmask_wet(Istr-1,Jend+1)*cff1+ &
!^ & cff2*(1.0_r8-cff1)
!^ vbar(Istr-1,Jend+1,kout)=vbar(Istr-1,Jend+1,kout)*cff
END IF
END IF
IF (DOMAIN(ng)%NorthEast_Corner(tile)) THEN
IF ((LBC_apply(ng)%north(Iend+1).and. &
& LBC_apply(ng)%east (Jend+1)).or. &
& (LBC(ieast,isVbar,ng)%nested.and. &
& LBC(inorth,isVbar,ng)%nested)) THEN
!^ cff1=ABS(ABS(GRID(ng)%vmask_wet(Iend+1,Jend+1))-1.0_r8)
!^ cff2=0.5_r8+DSIGN(0.5_r8,vbar(Iend+1,Jend+1,kout))* &
!^ & GRID(ng)%vmask_wet(Iend+1,Jend+1)
!^ cff=0.5_r8*GRID(ng)%vmask_wet(Iend+1,Jend+1)*cff1+ &
!^ & cff2*(1.0_r8-cff1)
!^ vbar(Iend+1,Jend+1,kout)=vbar(Iend+1,Jend+1,kout)*cff
END IF
END IF
END IF
# endif
!
RETURN
END SUBROUTINE tl_v2dbc_tile
#endif
END MODULE tl_v2dbc_mod