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adcroft |
1.12 |
C $Header: /u/gcmpack/models/MITgcmUV/model/src/timestep.F,v 1.11 1998/06/09 16:48:03 cnh Exp $ |
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cnh |
1.1 |
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adcroft |
1.10 |
#include "CPP_OPTIONS.h" |
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cnh |
1.1 |
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C /==========================================================\ |
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C | S/R TIMESTEP | |
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C | o Step model fields forward in time | |
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C \==========================================================/ |
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adcroft |
1.4 |
SUBROUTINE TIMESTEP( bi, bj, iMin, iMax, jMin, jMax, |
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adcroft |
1.7 |
I K, |
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adcroft |
1.4 |
I myThid ) |
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cnh |
1.1 |
implicit none |
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! Common |
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#include "SIZE.h" |
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#include "DYNVARS.h" |
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cnh |
1.11 |
#include "EEPARAMS.h" |
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cnh |
1.1 |
#include "PARAMS.h" |
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#include "GRID.h" |
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C == Routine Arguments == |
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INTEGER bi,bj,iMin,iMax,jMin,jMax |
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adcroft |
1.4 |
INTEGER K |
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cnh |
1.1 |
INTEGER myThid |
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C == Local variables == |
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adcroft |
1.4 |
INTEGER i,j |
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adcroft |
1.7 |
_RL ab15,ab05 |
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cnh |
1.1 |
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C Adams-Bashforth timestepping weights |
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ab15=1.5+abeps |
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ab05=-0.5-abeps |
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adcroft |
1.7 |
C Step forward zonal velocity (store in Gu) |
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cnh |
1.1 |
DO j=jMin,jMax |
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DO i=iMin,iMax |
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adcroft |
1.7 |
gUNm1(i,j,k,bi,bj)=uVel(i,j,k,bi,bj) |
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cnh |
1.1 |
& +deltaTmom*(ab15*gU(i,j,k,bi,bj)+ab05*gUNm1(i,j,k,bi,bj) |
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cnh |
1.9 |
#ifdef ALLOW_CD |
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& +guCD(i,j,k,bi,bj) |
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#endif |
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adcroft |
1.7 |
& )*_maskW(i,j,k,bi,bj) |
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cnh |
1.1 |
ENDDO |
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ENDDO |
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adcroft |
1.12 |
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adcroft |
1.7 |
C Step forward meridional velocity (store in Gv) |
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cnh |
1.1 |
DO j=jMin,jMax |
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DO i=iMin,iMax |
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adcroft |
1.7 |
gVNm1(i,j,k,bi,bj)=vVel(i,j,k,bi,bj) |
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cnh |
1.1 |
& +deltaTmom*(ab15*gV(i,j,k,bi,bj)+ab05*gVNm1(i,j,k,bi,bj) |
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cnh |
1.9 |
#ifdef ALLOW_CD |
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& +gvCD(i,j,k,bi,bj) |
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#endif |
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adcroft |
1.7 |
& )*_maskS(i,j,k,bi,bj) |
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cnh |
1.1 |
ENDDO |
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ENDDO |
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adcroft |
1.12 |
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cnh |
1.1 |
C Step forward temperature |
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adcroft |
1.12 |
IF (tempStepping) THEN |
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cnh |
1.1 |
DO j=jMin,jMax |
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DO i=iMin,iMax |
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adcroft |
1.8 |
theta(i,j,k,bi,bj)=theta(i,j,k,bi,bj) |
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cnh |
1.1 |
& +deltaTtracer*(ab15*gT(i,j,k,bi,bj)+ab05*gTNm1(i,j,k,bi,bj)) |
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adcroft |
1.8 |
gTNm1(i,j,k,bi,bj)=gT(i,j,k,bi,bj) |
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cnh |
1.1 |
ENDDO |
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ENDDO |
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adcroft |
1.12 |
ENDIF |
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C Step forward salt |
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IF (saltStepping) THEN |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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salt(i,j,k,bi,bj)=salt(i,j,k,bi,bj) |
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& +deltaTtracer*(ab15*gS(i,j,k,bi,bj)+ab05*gSNm1(i,j,k,bi,bj)) |
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gSNm1(i,j,k,bi,bj)=gS(i,j,k,bi,bj) |
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ENDDO |
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ENDDO |
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ENDIF |
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cnh |
1.1 |
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RETURN |
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END |
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