| 1 |
C $Header: /u/gcmpack/MITgcm/model/src/calc_grad_phi_hyd.F,v 1.8 2005/12/08 15:44:33 heimbach Exp $ |
| 2 |
C $Name: $ |
| 3 |
|
| 4 |
#include "CPP_OPTIONS.h" |
| 5 |
|
| 6 |
CBOP |
| 7 |
C !ROUTINE: CALC_GRAD_PHI_HYD |
| 8 |
C !INTERFACE: |
| 9 |
SUBROUTINE CALC_GRAD_PHI_HYD( |
| 10 |
I k, bi, bj, iMin,iMax, jMin,jMax, |
| 11 |
I phiHydC, alphRho, tFld, sFld, |
| 12 |
O dPhiHydX, dPhiHydY, |
| 13 |
I myTime, myIter, myThid) |
| 14 |
C !DESCRIPTION: \bv |
| 15 |
C *==========================================================* |
| 16 |
C | S/R CALC_GRAD_PHI_HYD |
| 17 |
C | o Calculate the gradient of Hydrostatic potential anomaly |
| 18 |
C *==========================================================* |
| 19 |
C \ev |
| 20 |
|
| 21 |
C !USES: |
| 22 |
IMPLICIT NONE |
| 23 |
C == Global variables == |
| 24 |
#include "SIZE.h" |
| 25 |
#include "EEPARAMS.h" |
| 26 |
#include "PARAMS.h" |
| 27 |
#include "GRID.h" |
| 28 |
#include "SURFACE.h" |
| 29 |
#include "DYNVARS.h" |
| 30 |
|
| 31 |
C !INPUT/OUTPUT PARAMETERS: |
| 32 |
C == Routine Arguments == |
| 33 |
C bi,bj :: tile index |
| 34 |
C iMin,iMax,jMin,jMax :: Loop counters |
| 35 |
C phiHydC :: Hydrostatic Potential anomaly |
| 36 |
C (atmos: =Geopotential ; ocean-z: =Pressure/rho) |
| 37 |
C alphRho :: Density (z-coord) or specific volume (p-coord) |
| 38 |
C tFld :: Potential temp. |
| 39 |
C sFld :: Salinity |
| 40 |
C dPhiHydX,Y :: Gradient (X & Y directions) of Hyd. Potential |
| 41 |
C myTime :: Current time |
| 42 |
C myIter :: Current iteration number |
| 43 |
C myThid :: Instance number for this call of the routine. |
| 44 |
INTEGER k, bi,bj, iMin,iMax, jMin,jMax |
| 45 |
_RL phiHydC(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
| 46 |
_RL alphRho(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
| 47 |
_RL tFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy) |
| 48 |
_RL sFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy) |
| 49 |
_RL dPhiHydX(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
| 50 |
_RL dPhiHydY(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
| 51 |
_RL myTime |
| 52 |
INTEGER myIter, myThid |
| 53 |
|
| 54 |
#ifdef INCLUDE_PHIHYD_CALCULATION_CODE |
| 55 |
|
| 56 |
C !LOCAL VARIABLES: |
| 57 |
C == Local variables == |
| 58 |
C i,j :: Loop counters |
| 59 |
INTEGER i,j |
| 60 |
_RL varLoc(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
| 61 |
#ifdef NONLIN_FRSURF |
| 62 |
_RL factorZ, factorP, conv_theta2T |
| 63 |
_RL factPI |
| 64 |
CHARACTER*(MAX_LEN_MBUF) msgBuf |
| 65 |
#endif |
| 66 |
CEOP |
| 67 |
|
| 68 |
#ifdef NONLIN_FRSURF |
| 69 |
IF (select_rStar.GE.2 .AND. nonlinFreeSurf.GE.4 ) THEN |
| 70 |
# ifndef DISABLE_RSTAR_CODE |
| 71 |
C- Integral of b.dr = rStarFac * Integral of b.dr* : |
| 72 |
C and will add later (select_rStar=2) the contribution of |
| 73 |
C the slope of the r* coordinate. |
| 74 |
IF ( buoyancyRelation .EQ. 'ATMOSPHERIC' ) THEN |
| 75 |
C- Consistent with Phi'= Integr[ theta'.dPi ] : |
| 76 |
DO j=jMin-1,jMax |
| 77 |
DO i=iMin-1,iMax |
| 78 |
varLoc(i,j) = phiHydC(i,j)*rStarFacC(i,j,bi,bj)**atm_kappa |
| 79 |
& + phi0surf(i,j,bi,bj) |
| 80 |
ENDDO |
| 81 |
ENDDO |
| 82 |
ELSE |
| 83 |
DO j=jMin-1,jMax |
| 84 |
DO i=iMin-1,iMax |
| 85 |
varLoc(i,j) = phiHydC(i,j)*rStarFacC(i,j,bi,bj) |
| 86 |
& + phi0surf(i,j,bi,bj) |
| 87 |
ENDDO |
| 88 |
ENDDO |
| 89 |
ENDIF |
| 90 |
ELSEIF (select_rStar.GE.1 .AND. nonlinFreeSurf.GE.4 ) THEN |
| 91 |
C- Integral of b.dr but scaled to correspond to a fixed r-level (=r*) |
| 92 |
C no contribution of the slope of the r* coordinate (select_rStar=1) |
| 93 |
IF ( buoyancyRelation .EQ. 'ATMOSPHERIC' ) THEN |
| 94 |
C- Consistent with Phi'= Integr[ theta'.dPi ] : |
| 95 |
DO j=jMin-1,jMax |
| 96 |
DO i=iMin-1,iMax |
| 97 |
IF (Ro_surf(i,j,bi,bj).EQ.rC(k)) THEN |
| 98 |
factPI=atm_Cp*( ((etaH(i,j,bi,bj)+rC(k))/atm_Po)**atm_kappa |
| 99 |
& -( rC(k) /atm_Po)**atm_kappa |
| 100 |
& ) |
| 101 |
varLoc(i,j) = factPI*alphRho(i,j) |
| 102 |
ELSEIF (Ro_surf(i,j,bi,bj).NE.0. _d 0) THEN |
| 103 |
factPI = (rC(k)/Ro_surf(i,j,bi,bj))**atm_kappa |
| 104 |
varLoc(i,j) = phiHydC(i,j) |
| 105 |
& *(rStarFacC(i,j,bi,bj)**atm_kappa - factPI) |
| 106 |
& /(1. _d 0 -factPI) |
| 107 |
& + phi0surf(i,j,bi,bj) |
| 108 |
ENDIF |
| 109 |
ENDDO |
| 110 |
ENDDO |
| 111 |
ELSE |
| 112 |
DO j=jMin-1,jMax |
| 113 |
DO i=iMin-1,iMax |
| 114 |
IF (Ro_surf(i,j,bi,bj).EQ.rC(k)) THEN |
| 115 |
WRITE(msgBuf,'(3A)') 'CALC_GRAD_PHI_HYD: ', |
| 116 |
& 'Problem when Ro_surf=rC', |
| 117 |
& ' with select_rStar,integr_GeoPot=1,4' |
| 118 |
CALL PRINT_ERROR( msgBuf , myThid) |
| 119 |
STOP 'CALC_GRAD_PHI_HYD: Pb in r* options implementation' |
| 120 |
ELSE |
| 121 |
varLoc(i,j) = phiHydC(i,j) |
| 122 |
& *(etaH(i,j,bi,bj)+Ro_surf(i,j,bi,bj)-rC(k)) |
| 123 |
& / (Ro_surf(i,j,bi,bj)-rC(k)) |
| 124 |
& + phi0surf(i,j,bi,bj) |
| 125 |
ENDIF |
| 126 |
ENDDO |
| 127 |
ENDDO |
| 128 |
ENDIF |
| 129 |
# endif /* DISABLE_RSTAR_CODE */ |
| 130 |
ELSE |
| 131 |
#else /* NONLIN_FRSURF */ |
| 132 |
IF (.TRUE.) THEN |
| 133 |
#endif /* NONLIN_FRSURF */ |
| 134 |
DO j=jMin-1,jMax |
| 135 |
DO i=iMin-1,iMax |
| 136 |
varLoc(i,j) = phiHydC(i,j)+phi0surf(i,j,bi,bj) |
| 137 |
ENDDO |
| 138 |
ENDDO |
| 139 |
ENDIF |
| 140 |
|
| 141 |
C-- Zonal & Meridional gradient of potential anomaly |
| 142 |
DO j=jMin,jMax |
| 143 |
DO i=iMin,iMax |
| 144 |
dPhiHydX(i,j) = _recip_dxC(i,j,bi,bj)*recip_deepFacC(k) |
| 145 |
& *( varLoc(i,j)-varLoc(i-1,j) )*recip_rhoFacC(k) |
| 146 |
dPhiHydY(i,j) = _recip_dyC(i,j,bi,bj)*recip_deepFacC(k) |
| 147 |
& *( varLoc(i,j)-varLoc(i,j-1) )*recip_rhoFacC(k) |
| 148 |
ENDDO |
| 149 |
ENDDO |
| 150 |
|
| 151 |
#ifdef NONLIN_FRSURF |
| 152 |
IF (select_rStar.GE.2 .AND. nonlinFreeSurf.GE.1 ) THEN |
| 153 |
IF ( buoyancyRelation .EQ. 'OCEANIC' ) THEN |
| 154 |
C-- z* coordinate slope term: rho'/rho0 * Grad_r(g.z) |
| 155 |
factorZ = gravity*recip_rhoConst*recip_rhoFacC(k)*0.5 _d 0 |
| 156 |
DO j=jMin-1,jMax |
| 157 |
DO i=iMin-1,iMax |
| 158 |
varLoc(i,j) = etaH(i,j,bi,bj) |
| 159 |
& *(1. _d 0 + rC(k)*recip_Rcol(i,j,bi,bj)) |
| 160 |
ENDDO |
| 161 |
ENDDO |
| 162 |
DO j=jMin,jMax |
| 163 |
DO i=iMin,iMax |
| 164 |
dPhiHydX(i,j) = dPhiHydX(i,j) |
| 165 |
& +factorZ*(alphRho(i-1,j)+alphRho(i,j)) |
| 166 |
& *(varLoc(i,j)-varLoc(i-1,j)) |
| 167 |
& *recip_dxC(i,j,bi,bj)*recip_deepFacC(k) |
| 168 |
dPhiHydY(i,j) = dPhiHydY(i,j) |
| 169 |
& +factorZ*(alphRho(i,j-1)+alphRho(i,j)) |
| 170 |
& *(varLoc(i,j)-varLoc(i,j-1)) |
| 171 |
& *recip_dyC(i,j,bi,bj)*recip_deepFacC(k) |
| 172 |
ENDDO |
| 173 |
ENDDO |
| 174 |
ELSEIF (buoyancyRelation .EQ. 'OCEANICP' ) THEN |
| 175 |
C-- p* coordinate slope term: alpha' * Grad_r( p ) |
| 176 |
factorP = 0.5 _d 0 |
| 177 |
DO j=jMin,jMax |
| 178 |
DO i=iMin,iMax |
| 179 |
dPhiHydX(i,j) = dPhiHydX(i,j) |
| 180 |
& +factorP*(alphRho(i-1,j)+alphRho(i,j)) |
| 181 |
& *(rStarFacC(i,j,bi,bj)-rStarFacC(i-1,j,bi,bj)) |
| 182 |
& *rC(k)*recip_dxC(i,j,bi,bj)*recip_deepFacC(k) |
| 183 |
dPhiHydY(i,j) = dPhiHydY(i,j) |
| 184 |
& +factorP*(alphRho(i,j-1)+alphRho(i,j)) |
| 185 |
& *(rStarFacC(i,j,bi,bj)-rStarFacC(i,j-1,bi,bj)) |
| 186 |
& *rC(k)*recip_dyC(i,j,bi,bj)*recip_deepFacC(k) |
| 187 |
ENDDO |
| 188 |
ENDDO |
| 189 |
ELSEIF ( buoyancyRelation .EQ. 'ATMOSPHERIC' ) THEN |
| 190 |
C-- p* coordinate slope term: alpha' * Grad_r( p ) |
| 191 |
conv_theta2T = (rC(k)/atm_Po)**atm_kappa |
| 192 |
factorP = (atm_Rd/rC(k))*conv_theta2T*0.5 _d 0 |
| 193 |
DO j=jMin,jMax |
| 194 |
DO i=iMin,iMax |
| 195 |
dPhiHydX(i,j) = dPhiHydX(i,j) |
| 196 |
& +factorP*(alphRho(i-1,j)+alphRho(i,j)) |
| 197 |
& *(rStarFacC(i,j,bi,bj)-rStarFacC(i-1,j,bi,bj)) |
| 198 |
& *rC(k)*recip_dxC(i,j,bi,bj)*recip_deepFacC(k) |
| 199 |
dPhiHydY(i,j) = dPhiHydY(i,j) |
| 200 |
& +factorP*(alphRho(i,j-1)+alphRho(i,j)) |
| 201 |
& *(rStarFacC(i,j,bi,bj)-rStarFacC(i,j-1,bi,bj)) |
| 202 |
& *rC(k)*recip_dyC(i,j,bi,bj)*recip_deepFacC(k) |
| 203 |
ENDDO |
| 204 |
ENDDO |
| 205 |
ENDIF |
| 206 |
ENDIF |
| 207 |
#endif /* NONLIN_FRSURF */ |
| 208 |
|
| 209 |
#endif /* INCLUDE_PHIHYD_CALCULATION_CODE */ |
| 210 |
|
| 211 |
RETURN |
| 212 |
END |
Parent Directory
| 
Revision Log
| 
Revision Graph