| 1 |
C $Header: /u/gcmpack/models/MITgcmUV/model/src/timestep.F,v 1.10 1998/06/09 15:58:36 adcroft Exp $ |
| 2 |
|
| 3 |
#include "CPP_OPTIONS.h" |
| 4 |
|
| 5 |
C /==========================================================\ |
| 6 |
C | S/R TIMESTEP | |
| 7 |
C | o Step model fields forward in time | |
| 8 |
C \==========================================================/ |
| 9 |
SUBROUTINE TIMESTEP( bi, bj, iMin, iMax, jMin, jMax, |
| 10 |
I K, |
| 11 |
I myThid ) |
| 12 |
implicit none |
| 13 |
! Common |
| 14 |
#include "SIZE.h" |
| 15 |
#include "DYNVARS.h" |
| 16 |
#include "EEPARAMS.h" |
| 17 |
#include "PARAMS.h" |
| 18 |
#include "GRID.h" |
| 19 |
C == Routine Arguments == |
| 20 |
INTEGER bi,bj,iMin,iMax,jMin,jMax |
| 21 |
INTEGER K |
| 22 |
INTEGER myThid |
| 23 |
C == Local variables == |
| 24 |
INTEGER i,j |
| 25 |
_RL ab15,ab05 |
| 26 |
|
| 27 |
C Adams-Bashforth timestepping weights |
| 28 |
ab15=1.5+abeps |
| 29 |
ab05=-0.5-abeps |
| 30 |
|
| 31 |
C Step forward zonal velocity (store in Gu) |
| 32 |
DO j=jMin,jMax |
| 33 |
DO i=iMin,iMax |
| 34 |
gUNm1(i,j,k,bi,bj)=uVel(i,j,k,bi,bj) |
| 35 |
& +deltaTmom*(ab15*gU(i,j,k,bi,bj)+ab05*gUNm1(i,j,k,bi,bj) |
| 36 |
#ifdef ALLOW_CD |
| 37 |
& +guCD(i,j,k,bi,bj) |
| 38 |
#endif |
| 39 |
& )*_maskW(i,j,k,bi,bj) |
| 40 |
ENDDO |
| 41 |
ENDDO |
| 42 |
C Step forward meridional velocity (store in Gv) |
| 43 |
DO j=jMin,jMax |
| 44 |
DO i=iMin,iMax |
| 45 |
gVNm1(i,j,k,bi,bj)=vVel(i,j,k,bi,bj) |
| 46 |
& +deltaTmom*(ab15*gV(i,j,k,bi,bj)+ab05*gVNm1(i,j,k,bi,bj) |
| 47 |
#ifdef ALLOW_CD |
| 48 |
& +gvCD(i,j,k,bi,bj) |
| 49 |
#endif |
| 50 |
& )*_maskS(i,j,k,bi,bj) |
| 51 |
ENDDO |
| 52 |
ENDDO |
| 53 |
C Step forward temperature |
| 54 |
DO j=jMin,jMax |
| 55 |
DO i=iMin,iMax |
| 56 |
theta(i,j,k,bi,bj)=theta(i,j,k,bi,bj) |
| 57 |
& +deltaTtracer*(ab15*gT(i,j,k,bi,bj)+ab05*gTNm1(i,j,k,bi,bj)) |
| 58 |
gTNm1(i,j,k,bi,bj)=gT(i,j,k,bi,bj) |
| 59 |
ENDDO |
| 60 |
ENDDO |
| 61 |
|
| 62 |
RETURN |
| 63 |
END |
Parent Directory
| 
Revision Log
| 
Revision Graph