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bbl_calc_rhs.F
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bbl_calc_rhs.F
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#include "BBL_OPTIONS.h"
CBOP
C !ROUTINE: BBL_CALC_RHS
C !INTERFACE:
SUBROUTINE BBL_CALC_RHS(
I myTime, myIter, myThid )
C !DESCRIPTION:
C Calculate tendency of tracers due to bottom boundary layer.
C !USES:
IMPLICIT NONE
#include "SIZE.h"
#include "EEPARAMS.h"
#include "PARAMS.h"
#include "GRID.h"
#include "DYNVARS.h"
#include "BBL.h"
C !INPUT PARAMETERS:
C myTime :: Current time in simulation
C myIter :: Current time-step number
C myThid :: my Thread Id number
_RL myTime
INTEGER myIter, myThid
C !OUTPUT PARAMETERS:
C !LOCAL VARIABLES:
C bi,bj :: Tile indices
C i,j :: Loop indices
C d,r :: Donnor/Receiver indices
C kBot :: k index of bottommost wet grid box
C kLowC1 :: k index of bottommost (i,j) cell
C kLowC2 :: k index of bottommost (i+1,j) or (i,j+1) cell
C kl :: k index at which to compare 2 cells
C thk_d :: thickness of donnor bottommost wet grid cell
C thk_r :: thickness of receiver bottommost wet grid cell
C bblEta_d :: bbl_eta of donnor cell
C bblEta_r :: bbl_eta of receiver cell
C resThk_r :: thk_r - bblEta_r
C Theta_r :: Theta of receiver cell
C bblTheta_d:: Theta of donnor bbl
C bblTheta_r:: Theta of receiver bbl
C resTheta_r:: Theta of resThk_r
C Salt_r :: Salt of receiver cell
C bblSalt_d :: Salt of donnor bbl
C bblSalt_r :: Salt of receiver bbl
C resSalt_r :: Salt of resThk_r
C deltaRho :: density change
C deltaDpt :: depth change
C dVol :: horizontal volume transport
C bbl_tend :: temporary variable for tendency terms
C sloc :: salinity of bottommost wet grid box
C tloc :: temperature of bottommost wet grid box
C rholoc :: in situ density of bottommost wet grid box
C rhoBBL :: in situ density of bottom boundary layer
C bbl_rho1 :: local (i,j) density
C bbl_rho2 :: local (i+1, j) or (i,j+1) density
INTEGER bi, bj
INTEGER i, j, d, r, kBot, kLowC1, kLowC2, kl
_RL thk_d, thk_r, bblEta_d, bblEta_r, resThk_r
_RL Theta_r, bblTheta_d, bblTheta_r, resTheta_r
_RL Salt_r, bblSalt_d, bblSalt_r, resSalt_r
_RL deltaRho, deltaDpt, dVol, bbl_tend
_RL sloc ( 0:sNx+1, 0:sNy+1 )
_RL tloc ( 0:sNx+1, 0:sNy+1 )
_RL rholoc ( 0:sNx+1, 0:sNy+1 )
_RL rhoBBL ( 0:sNx+1, 0:sNy+1 )
_RL bbl_rho1, bbl_rho2
CEOP
C-- Loops on tile indices bi,bj
DO bj=myByLo(myThid),myByHi(myThid)
DO bi=myBxLo(myThid),myBxHi(myThid)
C Initialize tendency terms, make local copy of
C bottomost temperature, salinity, in-situ density
C and in-situ BBL density.
DO j=0,sNy+1
DO i=0,sNx+1
bbl_TendTheta(i,j,bi,bj) = 0. _d 0
bbl_TendSalt (i,j,bi,bj) = 0. _d 0
kBot = max(1,kLowC(i,j,bi,bj))
tLoc(i,j) = theta(i,j,kBot,bi,bj)
sLoc(i,j) = salt (i,j,kBot,bi,bj)
rholoc(i,j) = rhoInSitu(i,j,kBot,bi,bj)
IF ( kBot .EQ. Nr ) THEN
rhoBBL(i,j) = bbl_rho_nr(i,j,bi,bj)
ELSE
rhoBBL(i,j) = rhoInSitu(i,j,kBot+1,bi,bj)
ENDIF
ENDDO
ENDDO
C==== Compute and apply vertical exchange between BBL and
C residual volume of botommost wet grid box.
C This operation does not change total tracer quantity
C in botommost wet grid box.
DO j=0,sNy+1
DO i=0,sNx+1
c DO j=-oly,sNy+oly
c DO i=-olx,sNx+olx
kBot = kLowC(i,j,bi,bj)
IF ( kBot .GT. 0 ) THEN
C If model density is lower than BBL, slowly diffuse upward.
IF ( rhoLoc(i,j) .LT. rhoBBL(i,j) )
& bbl_eta(i,j,bi,bj) = max ( 0. _d 0 ,
& bbl_eta(i,j,bi,bj) - bbl_wvel * dTtracerLev(kBot) )
C If model density is higher than BBL then mix instantly.
IF ( rhoLoc(i,j) .GE. rhoBBL(i,j) .OR.
& bbl_eta(i,j,bi,bj) .EQ. 0. _d 0 ) THEN
bbl_theta(i,j,bi,bj) = tLoc(i,j)
bbl_salt (i,j,bi,bj) = sLoc(i,j)
bbl_eta (i,j,bi,bj) = 0. _d 0
ENDIF
ENDIF
ENDDO
ENDDO
C==== Compute meridional bbl exchange at northern edge.
j=sNy
DO i=0,sNx+1
kLowC1 = kLowC(i,j ,bi,bj)
kLowC2 = kLowC(i,j+1,bi,bj)
IF ((kLowC1.GT.0).AND.(kLowC2.GT.0)) THEN
C Compare the bbl densities at the higher pressure
C (highest possible density of given t,s)
C bbl in situ density is stored in k > kLowC indices
kl = MAX(kLowC1,kLowC2) + 1
deltaDpt = R_low(i,j,bi,bj) + bbl_eta(i,j,bi,bj) -
& R_low(i,j+1,bi,bj) - bbl_eta(i,j+1,bi,bj)
IF ( deltaDpt .GT. 0. ) THEN
IF ( kl .GT. Nr ) THEN
bbl_rho1 = bbl_rho_nr(i,j,bi,bj)
ELSE
bbl_rho1 = rhoInSitu(i,j,kl,bi,bj)
ENDIF
bbl_rho2 = rhoInSitu(i,j+1,kLowC2,bi,bj)
ELSE
bbl_rho1 = rhoInSitu(i,j,kLowC1,bi,bj)
IF ( kl .GT. Nr ) THEN
bbl_rho2 = bbl_rho_nr(i,j+1,bi,bj)
ELSE
bbl_rho2 = rhoInSitu(i,j+1,kl,bi,bj)
ENDIF
ENDIF
deltaRho = bbl_rho2 - bbl_rho1
IF ( (deltaRho*deltaDpt) .LT. 0. ) THEN
C If heavy BBL water is higher than light BBL water,
C exchange properties laterally.
C Determine donnor and receiver cells.
IF ( bbl_rho1 .GT. bbl_rho2 ) THEN
d = j
r = j + 1
ELSE
d = j + 1
r = j
ENDIF
C Replenish thickness of donor cell, if needed.
thk_d = drF(kLowC(i,d,bi,bj)) *
& hFacC(i,d,kLowC(i,d,bi,bj),bi,bj)
IF ( ( bbl_theta(i,d,bi,bj) .EQ. tloc(i,d) ) .AND.
& ( bbl_salt (i,d,bi,bj) .EQ. sloc(i,d) ) .AND.
& ( bbl_eta (i,d,bi,bj) .LT. bbl_initEta ) )
& bbl_eta(i,d,bi,bj) = min ( bbl_initEta, thk_d )
C Compute some donnor and receiver cell properties.
thk_r = drF(kLowC(i,r,bi,bj)) *
& hFacC(i,r,kLowC(i,r,bi,bj),bi,bj)
Theta_r = tLoc(i,r)
Salt_r = sLoc(i,r)
bblTheta_d = bbl_theta(i,d,bi,bj)
bblTheta_r = bbl_theta(i,r,bi,bj)
bblSalt_d = bbl_salt (i,d,bi,bj)
bblSalt_r = bbl_salt (i,r,bi,bj)
bblEta_d = bbl_eta (i,d,bi,bj)
bblEta_r = bbl_eta (i,r,bi,bj)
resThk_r = thk_r - bblEta_r
resTheta_r = (Theta_r*thk_r-bblTheta_r*bblEta_r)/resThk_r
resSalt_r = (Salt_r *thk_r-bblSalt_r *bblEta_r)/resThk_r
C Compute volume transport from donnor to receiver.
dVol = min ( bblEta_d * rA(i,d,bi,bj) / 2. _d 0,
& resThk_r * rA(i,r,bi,bj) / 2. _d 0,
& dxG(i,j+1,bi,bj) * bblEta_d * bbl_hvel * deltaT )
C Compute temperature tracer tendencies for donor and receiver cell.
bbl_tend = dVol * (bblTheta_d - resTheta_r) / deltaT
bbl_TendTheta(i,d,bi,bj) = bbl_TendTheta(i,d,bi,bj) -
& bbl_tend / rA(i,d,bi,bj) / thk_d
bbl_TendTheta(i,r,bi,bj) = bbl_TendTheta(i,r,bi,bj) +
& bbl_tend / rA(i,r,bi,bj) / thk_r
C Compute salinity tracer tendencies for donor and receiver cell.
bbl_tend = dVol * (bblSalt_d - resSalt_r) / deltaT
bbl_TendSalt(i,d,bi,bj) = bbl_TendSalt(i,d,bi,bj) -
& bbl_tend / rA(i,d,bi,bj) / thk_d
bbl_TendSalt(i,r,bi,bj) = bbl_TendSalt(i,r,bi,bj) +
& bbl_tend / rA(i,r,bi,bj) / thk_r
C Adjust pbl thickness and tracer properties.
bbl_eta(i,d,bi,bj) = bblEta_d - dVol / rA(i,d,bi,bj)
IF ( bbl_eta(i,d,bi,bj) .LT. 0.0001 ) THEN
bbl_eta(i,d,bi,bj) = 0. _d 0
bbl_theta(i,d,bi,bj) = tLoc(i,d)
bbl_salt (i,d,bi,bj) = sLoc(i,d)
ENDIF
bbl_eta(i,r,bi,bj) = bblEta_r + dVol / rA(i,r,bi,bj)
bbl_theta(i,r,bi,bj) = ( dVol * bblTheta_d +
& bblEta_r * rA(i,r,bi,bj) * bblTheta_r ) /
& ( bbl_eta(i,r,bi,bj) * rA(i,r,bi,bj) )
bbl_salt(i,r,bi,bj) = ( dVol * bblSalt_d +
& bblEta_r * rA(i,r,bi,bj) * bblSalt_r ) /
& ( bbl_eta(i,r,bi,bj) * rA(i,r,bi,bj) )
ENDIF
ENDIF
ENDDO
C==== Compute meridional bbl exchange inside tile.
DO j=0,sNy-1
DO i=0,sNx+1
kLowC1 = kLowC(i,j ,bi,bj)
kLowC2 = kLowC(i,j+1,bi,bj)
IF ((kLowC1.GT.0).AND.(kLowC2.GT.0)) THEN
C Compare the bbl densities at the higher pressure
C (highest possible density of given t,s)
C bbl in situ density is stored in k > kLowC indices
kl = MAX(kLowC1,kLowC2) + 1
deltaDpt = R_low(i,j,bi,bj) + bbl_eta(i,j,bi,bj) -
& R_low(i,j+1,bi,bj) - bbl_eta(i,j+1,bi,bj)
IF ( deltaDpt .GT. 0. ) THEN
IF ( kl .GT. Nr ) THEN
bbl_rho1 = bbl_rho_nr(i,j,bi,bj)
ELSE
bbl_rho1 = rhoInSitu(i,j,kl,bi,bj)
ENDIF
bbl_rho2 = rhoInSitu(i,j+1,kLowC2,bi,bj)
ELSE
bbl_rho1 = rhoInSitu(i,j,kLowC1,bi,bj)
IF ( kl .GT. Nr ) THEN
bbl_rho2 = bbl_rho_nr(i,j+1,bi,bj)
ELSE
bbl_rho2 = rhoInSitu(i,j+1,kl,bi,bj)
ENDIF
ENDIF
deltaRho = bbl_rho2 - bbl_rho1
IF ( (deltaRho*deltaDpt) .LT. 0. ) THEN
C If heavy BBL water is higher than light BBL water,
C exchange properties laterally.
C Determine donnor and receiver cells.
IF ( bbl_rho1 .GT. bbl_rho2 ) THEN
d = j
r = j + 1
ELSE
d = j + 1
r = j
ENDIF
C Replenish thickness of donor cell, if needed.
thk_d = drF(kLowC(i,d,bi,bj)) *
& hFacC(i,d,kLowC(i,d,bi,bj),bi,bj)
IF ( ( bbl_theta(i,d,bi,bj) .EQ. tloc(i,d) ) .AND.
& ( bbl_salt (i,d,bi,bj) .EQ. sloc(i,d) ) .AND.
& ( bbl_eta (i,d,bi,bj) .LT. bbl_initEta ) )
& bbl_eta(i,d,bi,bj) = min ( bbl_initEta, thk_d )
C Compute some donnor and receiver cell properties.
thk_r = drF(kLowC(i,r,bi,bj)) *
& hFacC(i,r,kLowC(i,r,bi,bj),bi,bj)
Theta_r = tLoc(i,r)
Salt_r = sLoc(i,r)
bblTheta_d = bbl_theta(i,d,bi,bj)
bblTheta_r = bbl_theta(i,r,bi,bj)
bblSalt_d = bbl_salt (i,d,bi,bj)
bblSalt_r = bbl_salt (i,r,bi,bj)
bblEta_d = bbl_eta (i,d,bi,bj)
bblEta_r = bbl_eta (i,r,bi,bj)
resThk_r = thk_r - bblEta_r
resTheta_r = (Theta_r*thk_r-bblTheta_r*bblEta_r)/resThk_r
resSalt_r = (Salt_r *thk_r-bblSalt_r *bblEta_r)/resThk_r
C Compute volume transport from donnor to receiver.
dVol = min ( bblEta_d * rA(i,d,bi,bj) / 2. _d 0,
& resThk_r * rA(i,r,bi,bj) / 2. _d 0,
& dxG(i,j+1,bi,bj) * bblEta_d * bbl_hvel * deltaT )
C Compute temperature tracer tendencies for donor and receiver cell.
bbl_tend = dVol * (bblTheta_d - resTheta_r) / deltaT
bbl_TendTheta(i,d,bi,bj) = bbl_TendTheta(i,d,bi,bj) -
& bbl_tend / rA(i,d,bi,bj) / thk_d
bbl_TendTheta(i,r,bi,bj) = bbl_TendTheta(i,r,bi,bj) +
& bbl_tend / rA(i,r,bi,bj) / thk_r
C Compute salinity tracer tendencies for donor and receiver cell.
bbl_tend = dVol * (bblSalt_d - resSalt_r) / deltaT
bbl_TendSalt(i,d,bi,bj) = bbl_TendSalt(i,d,bi,bj) -
& bbl_tend / rA(i,d,bi,bj) / thk_d
bbl_TendSalt(i,r,bi,bj) = bbl_TendSalt(i,r,bi,bj) +
& bbl_tend / rA(i,r,bi,bj) / thk_r
C Adjust pbl thickness and tracer properties.
bbl_eta(i,d,bi,bj) = bblEta_d - dVol / rA(i,d,bi,bj)
IF ( bbl_eta(i,d,bi,bj) .LT. 0.0001 ) THEN
bbl_eta(i,d,bi,bj) = 0. _d 0
bbl_theta(i,d,bi,bj) = tLoc(i,d)
bbl_salt (i,d,bi,bj) = sLoc(i,d)
ENDIF
bbl_eta(i,r,bi,bj) = bblEta_r + dVol / rA(i,r,bi,bj)
bbl_theta(i,r,bi,bj) = ( dVol * bblTheta_d +
& bblEta_r * rA(i,r,bi,bj) * bblTheta_r ) /
& ( bbl_eta(i,r,bi,bj) * rA(i,r,bi,bj) )
bbl_salt(i,r,bi,bj) = ( dVol * bblSalt_d +
& bblEta_r * rA(i,r,bi,bj) * bblSalt_r ) /
& ( bbl_eta(i,r,bi,bj) * rA(i,r,bi,bj) )
ENDIF
ENDIF
ENDDO
ENDDO
C==== Compute zonal bbl exchange at Eastern edge.
i=sNx
DO j=1,sNy
kLowC1 = kLowC(i ,j,bi,bj)
kLowC2 = kLowC(i+1,j,bi,bj)
IF ((kLowC1.GT.0).AND.(kLowC2.GT.0)) THEN
C Compare the bbl densities at the higher pressure
C (highest possible density of given t,s)
C bbl in situ density is stored in k > kLowC indices
kl = MAX(kLowC1,kLowC2) + 1
deltaDpt = R_low(i,j,bi,bj) + bbl_eta(i,j,bi,bj) -
& R_low(i+1,j,bi,bj) - bbl_eta(i+1,j,bi,bj)
IF ( deltaDpt .GT. 0. ) THEN
IF ( kl .GT. Nr ) THEN
bbl_rho1 = bbl_rho_nr(i,j,bi,bj)
ELSE
bbl_rho1 = rhoInSitu(i,j,kl,bi,bj)
ENDIF
bbl_rho2 = rhoInSitu(i+1,j,kLowC2,bi,bj)
ELSE
bbl_rho1 = rhoInSitu(i,j,kLowC1,bi,bj)
IF ( kl .GT. Nr ) THEN
bbl_rho2 = bbl_rho_nr(i+1,j,bi,bj)
ELSE
bbl_rho2 = rhoInSitu(i+1,j,kl,bi,bj)
ENDIF
ENDIF
deltaRho = bbl_rho2 - bbl_rho1
IF ( (deltaRho*deltaDpt) .LT. 0. ) THEN
C If heavy BBL water is higher than light BBL water,
C exchange properties laterally.
C Determine donnor and receiver cells.
IF ( bbl_rho1 .GT. bbl_rho2 ) THEN
d = i
r = i + 1
ELSE
d = i + 1
r = i
ENDIF
C Replenish thickness of donor cell, if needed.
thk_d = drF(kLowC(d,j,bi,bj)) *
& hFacC(d,j,kLowC(d,j,bi,bj),bi,bj)
IF ( ( bbl_theta(d,j,bi,bj) .EQ. tloc(d,j) ) .AND.
& ( bbl_salt (d,j,bi,bj) .EQ. sloc(d,j) ) .AND.
& ( bbl_eta (d,j,bi,bj) .LT. bbl_initEta ) )
& bbl_eta(d,j,bi,bj) = min ( bbl_initEta, thk_d )
C Compute some donnor and receiver cell properties.
thk_r = drF(kLowC(r,j,bi,bj)) *
& hFacC(r,j,kLowC(r,j,bi,bj),bi,bj)
Theta_r = tLoc(r,j)
Salt_r = sLoc(r,j)
bblTheta_d = bbl_theta(d,j,bi,bj)
bblTheta_r = bbl_theta(r,j,bi,bj)
bblSalt_d = bbl_salt (d,j,bi,bj)
bblSalt_r = bbl_salt (r,j,bi,bj)
bblEta_d = bbl_eta (d,j,bi,bj)
bblEta_r = bbl_eta (r,j,bi,bj)
resThk_r = thk_r - bblEta_r
resTheta_r = (Theta_r*thk_r-bblTheta_r*bblEta_r)/resThk_r
resSalt_r = (Salt_r *thk_r-bblSalt_r *bblEta_r)/resThk_r
C Compute volume transport from donnor to receiver.
dVol = min ( bblEta_d * rA(d,j,bi,bj) / 2. _d 0,
& resThk_r * rA(r,j,bi,bj) / 2. _d 0,
& dxG(i+1,j,bi,bj) * bblEta_d * bbl_hvel * deltaT )
C Compute temperature tracer tendencies for donor and receiver cell.
bbl_tend = dVol * (bblTheta_d - resTheta_r) / deltaT
bbl_TendTheta(d,j,bi,bj) = bbl_TendTheta(d,j,bi,bj) -
& bbl_tend / rA(d,j,bi,bj) / thk_d
bbl_TendTheta(r,j,bi,bj) = bbl_TendTheta(r,j,bi,bj) +
& bbl_tend / rA(r,j,bi,bj) / thk_r
C Compute salinity tracer tendencies for donor and receiver cell.
bbl_tend = dVol * (bblSalt_d - resSalt_r) / deltaT
bbl_TendSalt(d,j,bi,bj) = bbl_TendSalt(d,j,bi,bj) -
& bbl_tend / rA(d,j,bi,bj) / thk_d
bbl_TendSalt(r,j,bi,bj) = bbl_TendSalt(r,j,bi,bj) +
& bbl_tend / rA(r,j,bi,bj) / thk_r
C Adjust pbl thickness and tracer properties.
bbl_eta(d,j,bi,bj) = bblEta_d - dVol / rA(d,j,bi,bj)
IF ( bbl_eta(d,j,bi,bj) .LT. 0.0001 ) THEN
bbl_eta(d,j,bi,bj) = 0. _d 0
bbl_theta(d,j,bi,bj) = tLoc(d,j)
bbl_salt (d,j,bi,bj) = sLoc(d,j)
ENDIF
bbl_eta(r,j,bi,bj) = bblEta_r + dVol / rA(r,j,bi,bj)
bbl_theta(r,j,bi,bj) = ( dVol * bblTheta_d +
& bblEta_r * rA(r,j,bi,bj) * bblTheta_r ) /
& ( bbl_eta(r,j,bi,bj) * rA(r,j,bi,bj) )
bbl_salt(r,j,bi,bj) = ( dVol * bblSalt_d +
& bblEta_r * rA(r,j,bi,bj) * bblSalt_r ) /
& ( bbl_eta(r,j,bi,bj) * rA(r,j,bi,bj) )
ENDIF
ENDIF
ENDDO
C==== Compute zonal bbl exchange inside tile.
DO j=1,sNy
DO i=0,sNx-1
kLowC1 = kLowC(i ,j,bi,bj)
kLowC2 = kLowC(i+1,j,bi,bj)
IF ((kLowC1.GT.0).AND.(kLowC2.GT.0)) THEN
C Compare the bbl densities at the higher pressure
C (highest possible density of given t,s)
C bbl in situ density is stored in k > kLowC indices
kl = MAX(kLowC1,kLowC2) + 1
deltaDpt = R_low(i,j,bi,bj) + bbl_eta(i,j,bi,bj) -
& R_low(i+1,j,bi,bj) - bbl_eta(i+1,j,bi,bj)
IF ( deltaDpt .GT. 0. ) THEN
IF ( kl .GT. Nr ) THEN
bbl_rho1 = bbl_rho_nr(i,j,bi,bj)
ELSE
bbl_rho1 = rhoInSitu(i,j,kl,bi,bj)
ENDIF
bbl_rho2 = rhoInSitu(i+1,j,kLowC2,bi,bj)
ELSE
bbl_rho1 = rhoInSitu(i,j,kLowC1,bi,bj)
IF ( kl .GT. Nr ) THEN
bbl_rho2 = bbl_rho_nr(i+1,j,bi,bj)
ELSE
bbl_rho2 = rhoInSitu(i+1,j,kl,bi,bj)
ENDIF
ENDIF
deltaRho = bbl_rho2 - bbl_rho1
IF ( (deltaRho*deltaDpt) .LT. 0. ) THEN
C If heavy BBL water is higher than light BBL water,
C exchange properties laterally.
C Determine donnor and receiver cells.
IF ( bbl_rho1 .GT. bbl_rho2 ) THEN
d = i
r = i + 1
ELSE
d = i + 1
r = i
ENDIF
C Replenish thickness of donor cell, if needed.
thk_d = drF(kLowC(d,j,bi,bj)) *
& hFacC(d,j,kLowC(d,j,bi,bj),bi,bj)
IF ( ( bbl_theta(d,j,bi,bj) .EQ. tloc(d,j) ) .AND.
& ( bbl_salt (d,j,bi,bj) .EQ. sloc(d,j) ) .AND.
& ( bbl_eta (d,j,bi,bj) .LT. bbl_initEta ) )
& bbl_eta(d,j,bi,bj) = min ( bbl_initEta, thk_d )
C Compute some donnor and receiver cell properties.
thk_r = drF(kLowC(r,j,bi,bj)) *
& hFacC(r,j,kLowC(r,j,bi,bj),bi,bj)
Theta_r = tLoc(r,j)
Salt_r = sLoc(r,j)
bblTheta_d = bbl_theta(d,j,bi,bj)
bblTheta_r = bbl_theta(r,j,bi,bj)
bblSalt_d = bbl_salt (d,j,bi,bj)
bblSalt_r = bbl_salt (r,j,bi,bj)
bblEta_d = bbl_eta (d,j,bi,bj)
bblEta_r = bbl_eta (r,j,bi,bj)
resThk_r = thk_r - bblEta_r
resTheta_r = (Theta_r*thk_r-bblTheta_r*bblEta_r)/resThk_r
resSalt_r = (Salt_r *thk_r-bblSalt_r *bblEta_r)/resThk_r
C Compute volume transport from donnor to receiver.
dVol = min ( bblEta_d * rA(d,j,bi,bj) / 2. _d 0,
& resThk_r * rA(r,j,bi,bj) / 2. _d 0,
& dxG(i+1,j,bi,bj) * bblEta_d * bbl_hvel * deltaT )
C Compute temperature tracer tendencies for donor and receiver cell.
bbl_tend = dVol * (bblTheta_d - resTheta_r) / deltaT
bbl_TendTheta(d,j,bi,bj) = bbl_TendTheta(d,j,bi,bj) -
& bbl_tend / rA(d,j,bi,bj) / thk_d
bbl_TendTheta(r,j,bi,bj) = bbl_TendTheta(r,j,bi,bj) +
& bbl_tend / rA(r,j,bi,bj) / thk_r
C Compute salinity tracer tendencies for donor and receiver cell.
bbl_tend = dVol * (bblSalt_d - resSalt_r) / deltaT
bbl_TendSalt(d,j,bi,bj) = bbl_TendSalt(d,j,bi,bj) -
& bbl_tend / rA(d,j,bi,bj) / thk_d
bbl_TendSalt(r,j,bi,bj) = bbl_TendSalt(r,j,bi,bj) +
& bbl_tend / rA(r,j,bi,bj) / thk_r
C Adjust pbl thickness and tracer properties.
bbl_eta(d,j,bi,bj) = bblEta_d - dVol / rA(d,j,bi,bj)
IF ( bbl_eta(d,j,bi,bj) .LT. 0.0001 ) THEN
bbl_eta(d,j,bi,bj) = 0. _d 0
bbl_theta(d,j,bi,bj) = tLoc(d,j)
bbl_salt (d,j,bi,bj) = sLoc(d,j)
ENDIF
bbl_eta(r,j,bi,bj) = bblEta_r + dVol / rA(r,j,bi,bj)
bbl_theta(r,j,bi,bj) = ( dVol * bblTheta_d +
& bblEta_r * rA(r,j,bi,bj) * bblTheta_r ) /
& ( bbl_eta(r,j,bi,bj) * rA(r,j,bi,bj) )
bbl_salt(r,j,bi,bj) = ( dVol * bblSalt_d +
& bblEta_r * rA(r,j,bi,bj) * bblSalt_r ) /
& ( bbl_eta(r,j,bi,bj) * rA(r,j,bi,bj) )
ENDIF
ENDIF
ENDDO
ENDDO
C-- end bi,bj loops.
ENDDO
ENDDO
CALL EXCH_XY_RL( bbl_eta , myThid )
CALL EXCH_XY_RL( bbl_theta , myThid )
CALL EXCH_XY_RL( bbl_salt , myThid )
CALL EXCH_XY_RL( bbl_TendTheta, myThid )
CALL EXCH_XY_RL( bbl_TendSalt , myThid )
RETURN
END