| 1 |
C $Header: /u/gcmpack/MITgcm_contrib/bbl/code/mypackage_calc_rhs.F,v 1.2 2010/11/23 07:06:25 dimitri Exp $ |
| 2 |
C $Name: $ |
| 3 |
|
| 4 |
#include "BBL_OPTIONS.h" |
| 5 |
|
| 6 |
CBOP |
| 7 |
C !ROUTINE: BBL_CALC_RHS |
| 8 |
|
| 9 |
C !INTERFACE: |
| 10 |
SUBROUTINE MYPACKAGE_CALC_RHS( |
| 11 |
I bi, bj, myTime, myIter, myThid ) |
| 12 |
|
| 13 |
C !DESCRIPTION: |
| 14 |
C Calculate tendency of tracers due to bottom boundary layer. |
| 15 |
C Scheme is currently coded for dTtracerLev(k) .EQ. deltaT. |
| 16 |
|
| 17 |
C !USES: |
| 18 |
IMPLICIT NONE |
| 19 |
#include "SIZE.h" |
| 20 |
#include "EEPARAMS.h" |
| 21 |
#include "PARAMS.h" |
| 22 |
#include "GRID.h" |
| 23 |
#include "DYNVARS.h" |
| 24 |
#include "BBL.h" |
| 25 |
|
| 26 |
C !INPUT PARAMETERS: |
| 27 |
C bi,bj :: Tile indices |
| 28 |
C myTime :: Current time in simulation |
| 29 |
C myIter :: Current time-step number |
| 30 |
C myThid :: my Thread Id number |
| 31 |
INTEGER bi, bj |
| 32 |
_RL myTime |
| 33 |
INTEGER myIter, myThid |
| 34 |
|
| 35 |
C !OUTPUT PARAMETERS: |
| 36 |
|
| 37 |
C !LOCAL VARIABLES: |
| 38 |
C i,j :: Loop indices |
| 39 |
C kBot :: k index of bottommost wet grid box |
| 40 |
C kLowC1 :: k index of bottommost (i,j) cell |
| 41 |
C kLowC2 :: k index of bottommost (i+1,j) or (i,j+1) cell |
| 42 |
C kl :: k index at which to compare 2 cells |
| 43 |
C resThk :: thickness of bottommost wet grid box minus bbl_eta |
| 44 |
C resTheta :: temperature of this residual volume |
| 45 |
C resSalt :: salinity of this residual volume |
| 46 |
C deltaRho :: density change |
| 47 |
C deltaDpt :: depth change |
| 48 |
C bbl_tend :: temporary variable for tendency terms |
| 49 |
C sloc :: salinity of bottommost wet grid box |
| 50 |
C tloc :: temperature of bottommost wet grid box |
| 51 |
C rholoc :: in situ density of bottommost wet grid box |
| 52 |
C rhoBBL :: in situ density of bottom boundary layer |
| 53 |
C fZon :: Zonal flux |
| 54 |
C fMer :: Meridional flux |
| 55 |
C bbl_rho1 :: local (i,j) density |
| 56 |
C bbl_rho2 :: local (i+1, j) or (i,j+1) density |
| 57 |
INTEGER i, j, kBot, kLowC1, kLowC2, kl |
| 58 |
_RL resThk, resTheta, resSalt |
| 59 |
_RL deltaRho, deltaDpt, bbl_tend |
| 60 |
_RL bbl_rho1, bbl_rho2 |
| 61 |
_RL sloc ( 1-Olx:sNx+Olx, 1-Oly:sNy+Oly ) |
| 62 |
_RL tloc ( 1-Olx:sNx+Olx, 1-Oly:sNy+Oly ) |
| 63 |
_RL rholoc ( 1-Olx:sNx+Olx, 1-Oly:sNy+Oly ) |
| 64 |
_RL rhoBBL ( 1-Olx:sNx+Olx, 1-Oly:sNy+Oly ) |
| 65 |
_RL fZon ( 1-Olx:sNx+Olx, 1-Oly:sNy+Oly ) |
| 66 |
_RL fMer ( 1-Olx:sNx+Olx, 1-Oly:sNy+Oly ) |
| 67 |
CHARACTER*(MAX_LEN_MBUF) msgBuf |
| 68 |
CEOP |
| 69 |
|
| 70 |
C Initialize tendency terms and make local copy of |
| 71 |
C bottomost temperature, salinity, and in-situ desnity |
| 72 |
C and of in-situ BBL density |
| 73 |
DO j=1-OLy,sNy+OLy |
| 74 |
DO i=1-OLx,sNx+OLx |
| 75 |
bbl_TendTheta(i,j,bi,bj) = 0. _d 0 |
| 76 |
bbl_TendSalt (i,j,bi,bj) = 0. _d 0 |
| 77 |
kBot = max(1,kLowC(i,j,bi,bj)) |
| 78 |
tLoc(i,j) = theta(i,j,kBot,bi,bj) |
| 79 |
sLoc(i,j) = salt (i,j,kBot,bi,bj) |
| 80 |
rholoc(i,j) = rhoInSitu(i,j,kBot,bi,bj) |
| 81 |
rhoBBL(i,j) = rhoInSitu(i,j,kBot+1, bi,bj) |
| 82 |
ENDDO |
| 83 |
ENDDO |
| 84 |
|
| 85 |
C==== Compute and apply vertical exchange between BBL and |
| 86 |
C residual volume of botommost wet grid box. |
| 87 |
C This operation does not change total tracer quantity |
| 88 |
C in botommost wet grid box. |
| 89 |
|
| 90 |
DO j=1-Oly,sNy+Oly |
| 91 |
DO i=1-Olx,sNx+Olx |
| 92 |
kBot = kLowC(i,j,bi,bj) |
| 93 |
IF ( kBot .GT. 0 ) THEN |
| 94 |
resThk = hFacC(i,j,kBot,bi,bj)*drF(kBot) - bbl_eta(i,j,bi,bj) |
| 95 |
|
| 96 |
C If bbl occupies the complete bottom model grid box or |
| 97 |
C if model density is higher than BBL then mix instantly. |
| 98 |
IF ( (resThk.LE.0) .OR. (rhoLoc(i,j).GE.rhoBBL(i,j)) ) THEN |
| 99 |
bbl_theta(i,j,bi,bj) = tLoc(i,j) |
| 100 |
bbl_salt (i,j,bi,bj) = sLoc(i,j) |
| 101 |
|
| 102 |
C If model density is lower than BBL, slowly diffuse upward. |
| 103 |
ELSE |
| 104 |
resTheta = ( tLoc(i,j) * (resThk+bbl_eta(i,j,bi,bj)) - |
| 105 |
& (bbl_theta(i,j,bi,bj)*bbl_eta(i,j,bi,bj)) ) / resThk |
| 106 |
resSalt = ( sLoc(i,j) * (resThk+bbl_eta(i,j,bi,bj)) - |
| 107 |
& (bbl_salt (i,j,bi,bj)*bbl_eta(i,j,bi,bj)) ) / resThk |
| 108 |
bbl_theta(i,j,bi,bj) = bbl_theta(i,j,bi,bj) + |
| 109 |
& deltaT * (resTheta-bbl_theta(i,j,bi,bj)) / bbl_RelaxR |
| 110 |
bbl_salt (i,j,bi,bj) = bbl_salt (i,j,bi,bj) + |
| 111 |
& deltaT * (resSalt -bbl_salt (i,j,bi,bj)) / bbl_RelaxR |
| 112 |
ENDIF |
| 113 |
ENDIF |
| 114 |
ENDDO |
| 115 |
ENDDO |
| 116 |
|
| 117 |
C==== Compute zonal bbl exchange. |
| 118 |
DO j=1-Oly,sNy+Oly |
| 119 |
DO i=1-Olx,sNx+Olx-1 |
| 120 |
kLowC1 = kLowC(i,j,bi,bj) |
| 121 |
kLowC2 = kLowC(i+1,j,bi,bj) |
| 122 |
IF ((kLowC1.GT.0).AND.(kLowC2.GT.0)) THEN |
| 123 |
C compare the bbl densities at the higher pressure (highest possible density of given t,s) |
| 124 |
C bbl in situ density is stored in kLowC + 1 index |
| 125 |
kl = MAX(kLowC1, kLowC2) + 1 |
| 126 |
bbl_rho1 = rhoInSitu(i,j,kl,bi,bj) |
| 127 |
bbl_rho2 = rhoInSitu(i+1,j,kl,bi,bj) |
| 128 |
deltaRho = bbl_rho2 - bbl_rho1 |
| 129 |
deltaDpt = R_low(i ,j,bi,bj) + bbl_eta(i ,j,bi,bj) - |
| 130 |
& R_low(i+1,j,bi,bj) - bbl_eta(i+1,j,bi,bj) |
| 131 |
|
| 132 |
C If heavy BBL water is higher than light BBL water, |
| 133 |
C exchange properties laterally. |
| 134 |
IF ( (deltaRho*deltaDpt) .LE. 0. ) THEN |
| 135 |
bbl_TendTheta(i,j,bi,bj) = bbl_TendTheta(i,j,bi,bj) + |
| 136 |
& ( bbl_theta(i+1,j,bi,bj) - bbl_theta(i,j,bi,bj) ) / |
| 137 |
& bbl_RelaxH |
| 138 |
bbl_TendTheta(i+1,j,bi,bj) = bbl_TendTheta(i+1,j,bi,bj) - |
| 139 |
& ( bbl_theta(i+1,j,bi,bj) - bbl_theta(i,j,bi,bj) ) * |
| 140 |
& ( rA(i ,j,bi,bj) * bbl_eta(i ,j,bi,bj) ) / |
| 141 |
& ( rA(i+1,j,bi,bj) * bbl_eta(i+1,j,bi,bj) * bbl_RelaxH ) |
| 142 |
bbl_TendSalt(i,j,bi,bj) = bbl_TendSalt(i,j,bi,bj) + |
| 143 |
& ( bbl_salt(i+1,j,bi,bj) - bbl_salt(i,j,bi,bj) ) / |
| 144 |
& bbl_RelaxH |
| 145 |
bbl_TendSalt(i+1,j,bi,bj) = bbl_TendSalt(i+1,j,bi,bj) - |
| 146 |
& ( bbl_salt(i+1,j,bi,bj) - bbl_salt(i,j,bi,bj) ) * |
| 147 |
& ( rA(i ,j,bi,bj) * bbl_eta(i ,j,bi,bj) ) / |
| 148 |
& ( rA(i+1,j,bi,bj) * bbl_eta(i+1,j,bi,bj) * bbl_RelaxH ) |
| 149 |
ENDIF |
| 150 |
ENDIF |
| 151 |
ENDDO |
| 152 |
ENDDO |
| 153 |
|
| 154 |
C==== Compute meridional bbl exchange. |
| 155 |
DO j=1-Oly,sNy+Oly-1 |
| 156 |
DO i=1-Olx,sNx+Olx |
| 157 |
kLowC1 = kLowC(i,j,bi,bj) |
| 158 |
kLowC2 = kLowC(i,j+1, bi,bj) |
| 159 |
IF ((kLowC1.GT.0).AND.(kLowC2.GT.0)) THEN |
| 160 |
C compare the bbl densities at the higher pressure (highest possible density of given t,s) |
| 161 |
C bbl in situ density is stored in kLowC + 1 index |
| 162 |
kl = MAX(kLowC1, kLowC2) + 1 |
| 163 |
bbl_rho1 = rhoInSitu(i,j,kl,bi,bj) |
| 164 |
bbl_rho2 = rhoInSitu(i,j+1,kl,bi,bj) |
| 165 |
deltaRho = bbl_rho2 - bbl_rho1 |
| 166 |
deltaDpt = R_low(i,j ,bi,bj) + bbl_eta(i,j ,bi,bj) - |
| 167 |
& R_low(i,j+1,bi,bj) - bbl_eta(i,j+1,bi,bj) |
| 168 |
|
| 169 |
C If heavy BBL water is higher than light BBL water, |
| 170 |
C exchange properties laterally. |
| 171 |
IF ( (deltaRho*deltaDpt) .LE. 0. ) THEN |
| 172 |
bbl_TendTheta(i,j,bi,bj) = bbl_TendTheta(i,j,bi,bj) + |
| 173 |
& ( bbl_theta(i,j+1,bi,bj) - bbl_theta(i,j,bi,bj) ) / |
| 174 |
& bbl_RelaxH |
| 175 |
bbl_TendTheta(i,j+1,bi,bj) = bbl_TendTheta(i,j+1,bi,bj) - |
| 176 |
& ( bbl_theta(i,j+1,bi,bj) - bbl_theta(i,j,bi,bj) ) * |
| 177 |
& ( rA(i ,j,bi,bj) * bbl_eta(i ,j,bi,bj) ) / |
| 178 |
& ( rA(i,j+1,bi,bj) * bbl_eta(i,j+1,bi,bj) ) / |
| 179 |
& bbl_RelaxH |
| 180 |
bbl_TendSalt(i,j,bi,bj) = bbl_TendSalt(i,j,bi,bj) + |
| 181 |
& ( bbl_salt(i,j+1,bi,bj) - bbl_salt(i,j,bi,bj) ) / |
| 182 |
& bbl_RelaxH |
| 183 |
bbl_TendSalt(i,j+1,bi,bj) = bbl_TendSalt(i,j+1,bi,bj) - |
| 184 |
& ( bbl_salt(i,j+1,bi,bj)-bbl_salt(i,j,bi,bj)) * |
| 185 |
& ( rA(i ,j,bi,bj) * bbl_eta(i ,j,bi,bj) ) / |
| 186 |
& ( rA(i,j+1,bi,bj) * bbl_eta(i,j+1,bi,bj) * bbl_RelaxH ) |
| 187 |
ENDIF |
| 188 |
ENDIF |
| 189 |
ENDDO |
| 190 |
ENDDO |
| 191 |
|
| 192 |
C==== Apply lateral BBL exchange then scale tendency term |
| 193 |
C for botommost wet grid box. |
| 194 |
DO j=1-Oly,sNy+Oly-1 |
| 195 |
DO i=1-Olx,sNx+Olx-1 |
| 196 |
kBot = kLowC(i,j,bi,bj) |
| 197 |
IF ( kBot .GT. 0 ) THEN |
| 198 |
bbl_theta(i,j,bi,bj) = bbl_theta(i,j,bi,bj) + |
| 199 |
& deltaT * bbl_TendTheta(i,j,bi,bj) |
| 200 |
bbl_salt (i,j,bi,bj) = bbl_salt (i,j,bi,bj) + |
| 201 |
& deltaT * bbl_TendSalt (i,j,bi,bj) |
| 202 |
bbl_TendTheta(i,j,bi,bj) = bbl_TendTheta(i,j,bi,bj) * |
| 203 |
& bbl_eta(i,j,bi,bj) / (hFacC(i,j,kBot,bi,bj)*drF(kBot)) |
| 204 |
bbl_TendSalt (i,j,bi,bj) = bbl_TendSalt (i,j,bi,bj) * |
| 205 |
& bbl_eta(i,j,bi,bj) / (hFacC(i,j,kBot,bi,bj)*drF(kBot)) |
| 206 |
ENDIF |
| 207 |
ENDDO |
| 208 |
ENDDO |
| 209 |
|
| 210 |
#ifdef ALLOW_DEBUG |
| 211 |
IF ( debugLevel .GE. debLevB ) THEN |
| 212 |
C Check salinity conservation |
| 213 |
bbl_tend=0 |
| 214 |
DO j=1,sNy |
| 215 |
DO i=1,sNx |
| 216 |
kBot = kLowC(i,j,bi,bj) |
| 217 |
IF ( kBot .GT. 0 ) THEN |
| 218 |
bbl_tend = bbl_tend + bbl_TendSalt(i,j,bi,bj) * |
| 219 |
& hFacC(i,j,kBot,bi,bj) * drF(kBot) *rA(i,j,bi,bj) |
| 220 |
ENDIF |
| 221 |
ENDDO |
| 222 |
ENDDO |
| 223 |
_GLOBAL_SUM_RL( bbl_tend, myThid ) |
| 224 |
WRITE(msgBuf,'(A,E10.2)') 'total salt tendency = ', bbl_tend |
| 225 |
CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
| 226 |
& SQUEEZE_RIGHT, myThid ) |
| 227 |
ENDIF |
| 228 |
#endif /* ALLOW_DEBUG */ |
| 229 |
|
| 230 |
|
| 231 |
CALL EXCH_XY_RL( bbl_theta, myThid ) |
| 232 |
CALL EXCH_XY_RL( bbl_salt , myThid ) |
| 233 |
|
| 234 |
RETURN |
| 235 |
END |
Parent Directory
| 
Revision Log
| 
Revision Graph