| 1 |
adcroft |
1.19 |
C $Header: /u/gcmpack/MITgcm/model/src/calc_gw.F,v 1.18 2004/12/09 09:01:07 mlosch Exp $ |
| 2 |
cnh |
1.9 |
C !DESCRIPTION: \bv |
| 3 |
jmc |
1.7 |
C $Name: $ |
| 4 |
edhill |
1.10 |
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| 5 |
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#include "PACKAGES_CONFIG.h" |
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adcroft |
1.1 |
#include "CPP_OPTIONS.h" |
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cnh |
1.9 |
CBOP |
| 9 |
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C !ROUTINE: CALC_GW |
| 10 |
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C !INTERFACE: |
| 11 |
adcroft |
1.1 |
SUBROUTINE CALC_GW( |
| 12 |
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I myThid) |
| 13 |
cnh |
1.9 |
C !DESCRIPTION: \bv |
| 14 |
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C *==========================================================* |
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C | S/R CALC_GW |
| 16 |
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C | o Calculate vert. velocity tendency terms ( NH, QH only ) |
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C *==========================================================* |
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C | In NH and QH, the vertical momentum tendency must be |
| 19 |
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C | calculated explicitly and included as a source term |
| 20 |
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C | for a 3d pressure eqn. Calculate that term here. |
| 21 |
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C | This routine is not used in HYD calculations. |
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C *==========================================================* |
| 23 |
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C \ev |
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| 25 |
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C !USES: |
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adcroft |
1.1 |
IMPLICIT NONE |
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C == Global variables == |
| 28 |
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#include "SIZE.h" |
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#include "DYNVARS.h" |
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#include "EEPARAMS.h" |
| 31 |
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#include "PARAMS.h" |
| 32 |
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#include "GRID.h" |
| 33 |
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#include "GW.h" |
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#include "CG3D.h" |
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| 36 |
cnh |
1.9 |
C !INPUT/OUTPUT PARAMETERS: |
| 37 |
adcroft |
1.1 |
C == Routine arguments == |
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C myThid - Instance number for this innvocation of CALC_GW |
| 39 |
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INTEGER myThid |
| 40 |
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| 41 |
adcroft |
1.3 |
#ifdef ALLOW_NONHYDROSTATIC |
| 42 |
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| 43 |
cnh |
1.9 |
C !LOCAL VARIABLES: |
| 44 |
adcroft |
1.1 |
C == Local variables == |
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cnh |
1.9 |
C bi, bj, :: Loop counters |
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C iMin, iMax, |
| 47 |
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C jMin, jMax |
| 48 |
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C flx_NS :: Temp. used for fVol meridional terms. |
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C flx_EW :: Temp. used for fVol zonal terms. |
| 50 |
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C flx_Up :: Temp. used for fVol vertical terms. |
| 51 |
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C flx_Dn :: Temp. used for fVol vertical terms. |
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adcroft |
1.1 |
INTEGER bi,bj,iMin,iMax,jMin,jMax |
| 53 |
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_RL flx_NS(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
| 54 |
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_RL flx_EW(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
| 55 |
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_RL flx_Dn(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
| 56 |
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_RL flx_Up(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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mlosch |
1.18 |
_RL fZon(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
| 58 |
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_RL fMer(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL del2w(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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adcroft |
1.1 |
C I,J,K - Loop counters |
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adcroft |
1.4 |
INTEGER i,j,k, kP1, kUp |
| 62 |
adcroft |
1.1 |
_RL wOverride |
| 63 |
mlosch |
1.15 |
_RS hFacWtmp |
| 64 |
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_RS hFacStmp |
| 65 |
mlosch |
1.18 |
_RS hFacCtmp |
| 66 |
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_RS recip_hFacCtmp |
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adcroft |
1.1 |
_RL ab15,ab05 |
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jmc |
1.12 |
_RL slipSideFac |
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adcroft |
1.1 |
_RL tmp_VbarZ, tmp_UbarZ, tmp_WbarZ |
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_RL Half |
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PARAMETER(Half=0.5D0) |
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cnh |
1.9 |
CEOP |
| 74 |
edhill |
1.10 |
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ceh3 needs an IF ( useNONHYDROSTATIC ) THEN |
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adcroft |
1.1 |
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mlosch |
1.14 |
iMin = 1 |
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iMax = sNx |
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jMin = 1 |
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jMax = sNy |
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adcroft |
1.1 |
C Adams-Bashforth timestepping weights |
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jmc |
1.11 |
ab15 = 1.5 _d 0 + abeps |
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ab05 = -0.5 _d 0 - abeps |
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| 86 |
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C Lateral friction (no-slip, free slip, or half slip): |
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IF ( no_slip_sides ) THEN |
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mlosch |
1.15 |
slipSideFac = -1. _d 0 |
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jmc |
1.11 |
ELSE |
| 90 |
mlosch |
1.15 |
slipSideFac = 1. _d 0 |
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jmc |
1.11 |
ENDIF |
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mlosch |
1.18 |
CML half slip was used before ; keep the line for now, but half slip is |
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CML not used anywhere in the code as far as I can see. |
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mlosch |
1.14 |
C slipSideFac = 0. _d 0 |
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jmc |
1.11 |
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| 96 |
adcroft |
1.1 |
DO bj=myByLo(myThid),myByHi(myThid) |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
| 98 |
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DO K=1,Nr |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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jmc |
1.8 |
gWNM1(i,j,k,bi,bj) = gW(i,j,k,bi,bj) |
| 102 |
adcroft |
1.1 |
gW(i,j,k,bi,bj) = 0. |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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| 109 |
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C Catch barotropic mode |
| 110 |
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IF ( Nr .LT. 2 ) RETURN |
| 111 |
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| 112 |
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C For each tile |
| 113 |
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DO bj=myByLo(myThid),myByHi(myThid) |
| 114 |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
| 115 |
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| 116 |
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C Boundaries condition at top |
| 117 |
mlosch |
1.14 |
DO J=jMin,jMax |
| 118 |
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DO I=iMin,iMax |
| 119 |
adcroft |
1.1 |
Flx_Dn(I,J,bi,bj)=0. |
| 120 |
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ENDDO |
| 121 |
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ENDDO |
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| 123 |
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C Sweep down column |
| 124 |
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DO K=2,Nr |
| 125 |
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Kp1=K+1 |
| 126 |
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wOverRide=1. |
| 127 |
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if (K.EQ.Nr) then |
| 128 |
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Kp1=Nr |
| 129 |
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wOverRide=0. |
| 130 |
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endif |
| 131 |
mlosch |
1.18 |
C horizontal bi-harmonic dissipation |
| 132 |
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IF (momViscosity .AND. viscA4W.NE.0. ) THEN |
| 133 |
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C calculate the horizontal Laplacian of vertical flow |
| 134 |
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C Zonal flux d/dx W |
| 135 |
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DO j=1-Oly,sNy+Oly |
| 136 |
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fZon(1-Olx,j)=0. |
| 137 |
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DO i=1-Olx+1,sNx+Olx |
| 138 |
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fZon(i,j) = drF(k)*_hFacC(i,j,k,bi,bj) |
| 139 |
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& *_dyG(i,j,bi,bj) |
| 140 |
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& *_recip_dxC(i,j,bi,bj) |
| 141 |
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& *(wVel(i,j,k,bi,bj)-wVel(i-1,j,k,bi,bj)) |
| 142 |
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#ifdef COSINEMETH_III |
| 143 |
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& *sqcosFacU(J,bi,bj) |
| 144 |
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#endif |
| 145 |
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ENDDO |
| 146 |
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ENDDO |
| 147 |
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C Meridional flux d/dy W |
| 148 |
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DO i=1-Olx,sNx+Olx |
| 149 |
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fMer(I,1-Oly)=0. |
| 150 |
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ENDDO |
| 151 |
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DO j=1-Oly+1,sNy+Oly |
| 152 |
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DO i=1-Olx,sNx+Olx |
| 153 |
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fMer(i,j) = drF(k)*_hFacC(i,j,k,bi,bj) |
| 154 |
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& *_dxG(i,j,bi,bj) |
| 155 |
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& *_recip_dyC(i,j,bi,bj) |
| 156 |
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& *(wVel(i,j,k,bi,bj)-wVel(i,j-1,k,bi,bj)) |
| 157 |
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#ifdef ISOTROPIC_COS_SCALING |
| 158 |
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#ifdef COSINEMETH_III |
| 159 |
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& *sqCosFacV(j,bi,bj) |
| 160 |
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#endif |
| 161 |
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#endif |
| 162 |
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ENDDO |
| 163 |
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ENDDO |
| 164 |
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| 165 |
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C del^2 W |
| 166 |
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C Difference of zonal fluxes ... |
| 167 |
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DO j=1-Oly,sNy+Oly |
| 168 |
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DO i=1-Olx,sNx+Olx-1 |
| 169 |
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del2w(i,j)=fZon(i+1,j)-fZon(i,j) |
| 170 |
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ENDDO |
| 171 |
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del2w(sNx+Olx,j)=0. |
| 172 |
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ENDDO |
| 173 |
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| 174 |
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C ... add difference of meridional fluxes and divide by volume |
| 175 |
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DO j=1-Oly,sNy+Oly-1 |
| 176 |
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DO i=1-Olx,sNx+Olx |
| 177 |
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C First compute the fraction of open water for the w-control volume |
| 178 |
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C at the southern face |
| 179 |
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hFacCtmp=max(hFacC(I,J,K-1,bi,bj)-Half,0. _d 0) |
| 180 |
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& + min(hFacC(I,J,K ,bi,bj),Half) |
| 181 |
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recip_hFacCtmp = 0. _d 0 |
| 182 |
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IF (hFacCtmp .GT. 0.) THEN |
| 183 |
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recip_hFacCtmp = 1./hFacCtmp |
| 184 |
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ELSE |
| 185 |
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recip_hFacCtmp = 0. _d 0 |
| 186 |
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ENDIF |
| 187 |
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del2w(i,j)=recip_rA(i,j,bi,bj) |
| 188 |
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& *recip_drC(k)*recip_hFacCtmp |
| 189 |
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& *( |
| 190 |
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& del2w(i,j) |
| 191 |
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& +( fMer(i,j+1)-fMer(i,j) ) |
| 192 |
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& ) |
| 193 |
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ENDDO |
| 194 |
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ENDDO |
| 195 |
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C-- No-slip BCs impose a drag at walls... |
| 196 |
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CML ************************************************************ |
| 197 |
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CML No-slip Boundary conditions for bi-harmonic dissipation |
| 198 |
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CML need to be implemented here! |
| 199 |
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CML ************************************************************ |
| 200 |
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ENDIF |
| 201 |
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| 202 |
adcroft |
1.1 |
C Flux on Southern face |
| 203 |
mlosch |
1.14 |
DO J=jMin,jMax+1 |
| 204 |
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DO I=iMin,iMax |
| 205 |
mlosch |
1.15 |
C First compute the fraction of open water for the w-control volume |
| 206 |
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C at the southern face |
| 207 |
edhill |
1.16 |
hFacStmp=max(hFacS(I,J,K-1,bi,bj)-Half,0. _d 0) |
| 208 |
mlosch |
1.15 |
& + min(hFacS(I,J,K ,bi,bj),Half) |
| 209 |
adcroft |
1.1 |
tmp_VbarZ=Half*( |
| 210 |
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& _hFacS(I,J,K-1,bi,bj)*vVel( I ,J,K-1,bi,bj) |
| 211 |
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& +_hFacS(I,J, K ,bi,bj)*vVel( I ,J, K ,bi,bj)) |
| 212 |
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Flx_NS(I,J,bi,bj)= |
| 213 |
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& tmp_VbarZ*Half*(wVel(I,J,K,bi,bj)+wVel(I,J-1,K,bi,bj)) |
| 214 |
mlosch |
1.17 |
& -viscAhW*_recip_dyC(I,J,bi,bj) |
| 215 |
mlosch |
1.15 |
& *(hFacStmp*(wVel(I,J,K,bi,bj)-wVel(I,J-1,K,bi,bj)) |
| 216 |
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& +(1. _d 0 - hFacStmp)*(1. _d 0 - slipSideFac) |
| 217 |
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& *wVel(I,J,K,bi,bj)) |
| 218 |
mlosch |
1.18 |
& +viscA4W*_recip_dyC(I,J,bi,bj)*(del2w(I,J)-del2w(I,J-1)) |
| 219 |
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#ifdef ISOTROPIC_COS_SCALING |
| 220 |
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#ifdef COSINEMETH_III |
| 221 |
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& *sqCosFacV(j,bi,bj) |
| 222 |
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#else |
| 223 |
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& *CosFacV(j,bi,bj) |
| 224 |
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#endif |
| 225 |
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#endif |
| 226 |
mlosch |
1.15 |
C The last term is the weighted average of the viscous stress at the open |
| 227 |
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C fraction of the w control volume and at the closed fraction of the |
| 228 |
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C the control volume. A more compact but less intelligible version |
| 229 |
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C of the last three lines is: |
| 230 |
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CML & *( (1 _d 0 - slipSideFac*(1 _d 0 - hFacStmp)) |
| 231 |
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CML & *wVel(I,J,K,bi,bi) + hFacStmp*wVel(I,J-1,K,bi,bj) ) |
| 232 |
adcroft |
1.1 |
ENDDO |
| 233 |
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ENDDO |
| 234 |
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C Flux on Western face |
| 235 |
mlosch |
1.14 |
DO J=jMin,jMax |
| 236 |
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DO I=iMin,iMax+1 |
| 237 |
mlosch |
1.15 |
C First compute the fraction of open water for the w-control volume |
| 238 |
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C at the western face |
| 239 |
edhill |
1.16 |
hFacWtmp=max(hFacW(I,J,K-1,bi,bj)-Half,0. _d 0) |
| 240 |
mlosch |
1.15 |
& + min(hFacW(I,J,K ,bi,bj),Half) |
| 241 |
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tmp_UbarZ=Half*( |
| 242 |
adcroft |
1.1 |
& _hFacW(I,J,K-1,bi,bj)*uVel( I ,J,K-1,bi,bj) |
| 243 |
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& +_hFacW(I,J, K ,bi,bj)*uVel( I ,J, K ,bi,bj)) |
| 244 |
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Flx_EW(I,J,bi,bj)= |
| 245 |
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& tmp_UbarZ*Half*(wVel(I,J,K,bi,bj)+wVel(I-1,J,K,bi,bj)) |
| 246 |
mlosch |
1.17 |
& -viscAhW*_recip_dxC(I,J,bi,bj) |
| 247 |
mlosch |
1.15 |
& *(hFacWtmp*(wVel(I,J,K,bi,bj)-wVel(I-1,J,K,bi,bj)) |
| 248 |
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& +(1 _d 0 - hFacWtmp)*(1 _d 0 - slipSideFac) |
| 249 |
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& *wVel(I,J,K,bi,bj) ) |
| 250 |
mlosch |
1.18 |
& +viscA4W*_recip_dxC(I,J,bi,bj)*(del2w(I,J)-del2w(I-1,J)) |
| 251 |
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#ifdef COSINEMETH_III |
| 252 |
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& *sqCosFacU(j,bi,bj) |
| 253 |
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#else |
| 254 |
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& *CosFacU(j,bi,bj) |
| 255 |
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#endif |
| 256 |
mlosch |
1.15 |
C The last term is the weighted average of the viscous stress at the open |
| 257 |
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C fraction of the w control volume and at the closed fraction of the |
| 258 |
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C the control volume. A more compact but less intelligible version |
| 259 |
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C of the last three lines is: |
| 260 |
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CML & *( (1 _d 0 - slipSideFac*(1 _d 0 - hFacWtmp)) |
| 261 |
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CML & *wVel(I,J,K,bi,bi) + hFacWtmp*wVel(I-1,J,K,bi,bj) ) |
| 262 |
adcroft |
1.1 |
ENDDO |
| 263 |
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ENDDO |
| 264 |
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C Flux on Lower face |
| 265 |
mlosch |
1.14 |
DO J=jMin,jMax |
| 266 |
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DO I=iMin,iMax |
| 267 |
adcroft |
1.1 |
Flx_Up(I,J,bi,bj)=Flx_Dn(I,J,bi,bj) |
| 268 |
mlosch |
1.14 |
tmp_WbarZ=Half*(wVel(I,J,K,bi,bj) |
| 269 |
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& +wOverRide*wVel(I,J,Kp1,bi,bj)) |
| 270 |
adcroft |
1.1 |
Flx_Dn(I,J,bi,bj)= |
| 271 |
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& tmp_WbarZ*tmp_WbarZ |
| 272 |
jmc |
1.11 |
& -viscAr*recip_drF(K) |
| 273 |
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& *( wVel(I,J,K,bi,bj)-wOverRide*wVel(I,J,Kp1,bi,bj) ) |
| 274 |
adcroft |
1.1 |
ENDDO |
| 275 |
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ENDDO |
| 276 |
|
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C Divergence of fluxes |
| 277 |
mlosch |
1.14 |
DO J=jMin,jMax |
| 278 |
|
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DO I=iMin,iMax |
| 279 |
adcroft |
1.1 |
gW(I,J,K,bi,bj) = 0. |
| 280 |
|
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& -( |
| 281 |
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& +_recip_dxF(I,J,bi,bj)*( |
| 282 |
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& Flx_EW(I+1,J,bi,bj)-Flx_EW(I,J,bi,bj) ) |
| 283 |
|
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& +_recip_dyF(I,J,bi,bj)*( |
| 284 |
|
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& Flx_NS(I,J+1,bi,bj)-Flx_NS(I,J,bi,bj) ) |
| 285 |
|
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& +recip_drC(K) *( |
| 286 |
|
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& Flx_Up(I,J,bi,bj) -Flx_Dn(I,J,bi,bj) ) |
| 287 |
|
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& ) |
| 288 |
|
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caja * recip_hFacU(I,J,K,bi,bj) |
| 289 |
|
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caja NOTE: This should be included |
| 290 |
|
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caja but we need an hFacUW (above U points) |
| 291 |
|
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caja and an hFacUS (above V points) too... |
| 292 |
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ENDDO |
| 293 |
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ENDDO |
| 294 |
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ENDDO |
| 295 |
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ENDDO |
| 296 |
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ENDDO |
| 297 |
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| 298 |
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| 299 |
|
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DO bj=myByLo(myThid),myByHi(myThid) |
| 300 |
|
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DO bi=myBxLo(myThid),myBxHi(myThid) |
| 301 |
|
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DO K=2,Nr |
| 302 |
mlosch |
1.14 |
DO j=jMin,jMax |
| 303 |
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DO i=iMin,iMax |
| 304 |
adcroft |
1.1 |
wVel(i,j,k,bi,bj) = wVel(i,j,k,bi,bj) |
| 305 |
adcroft |
1.19 |
& +deltatMom*nh_Am2*( ab15*gW(i,j,k,bi,bj) |
| 306 |
adcroft |
1.1 |
& +ab05*gWNM1(i,j,k,bi,bj) ) |
| 307 |
|
|
IF (hFacC(I,J,K,bi,bj).EQ.0.) wVel(i,j,k,bi,bj)=0. |
| 308 |
|
|
ENDDO |
| 309 |
|
|
ENDDO |
| 310 |
adcroft |
1.4 |
ENDDO |
| 311 |
|
|
ENDDO |
| 312 |
|
|
ENDDO |
| 313 |
|
|
|
| 314 |
adcroft |
1.5 |
#ifdef ALLOW_OBCS |
| 315 |
|
|
IF (useOBCS) THEN |
| 316 |
adcroft |
1.4 |
C-- This call is aesthetic: it makes the W field |
| 317 |
|
|
C consistent with the OBs but this has no algorithmic |
| 318 |
|
|
C impact. This is purely for diagnostic purposes. |
| 319 |
adcroft |
1.5 |
DO bj=myByLo(myThid),myByHi(myThid) |
| 320 |
|
|
DO bi=myBxLo(myThid),myBxHi(myThid) |
| 321 |
|
|
DO K=1,Nr |
| 322 |
|
|
CALL OBCS_APPLY_W( bi, bj, K, wVel, myThid ) |
| 323 |
|
|
ENDDO |
| 324 |
adcroft |
1.1 |
ENDDO |
| 325 |
|
|
ENDDO |
| 326 |
adcroft |
1.5 |
ENDIF |
| 327 |
|
|
#endif /* ALLOW_OBCS */ |
| 328 |
adcroft |
1.1 |
|
| 329 |
|
|
#endif /* ALLOW_NONHYDROSTATIC */ |
| 330 |
|
|
|
| 331 |
|
|
RETURN |
| 332 |
|
|
END |
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