pkg/generic_advdiff/timestep_tracer.F

C $Header: /u/gcmpack/models/MITgcmUV/pkg/generic_advdiff/timestep_tracer.F,v 1.1 2001/05/30 19:34:48 adcroft Exp $
C $Name:  $

#include "CPP_OPTIONS.h"

      SUBROUTINE TIMESTEP_TRACER(
     I                     bi, bj, iMin, iMax, jMin, jMax, K, tauAB,
     U                     tracer, gTracer, gTrNm1,
     I                     myIter, myThid )
C     /==========================================================\
C     | S/R TIMESTEP_TRACER                                      |
C     | o Step model tracer field forward in time                |
C     \==========================================================/
      IMPLICIT NONE

C     == Global variables ===
#include "SIZE.h"
#include "EEPARAMS.h"
#include "PARAMS.h"
#include "GAD.h"

C     == Routine Arguments ==
C     tauAB - Adams-Bashforth timestepping weight: 0=forward ; 1/2=Adams-Bashf.
      INTEGER bi,bj,iMin,iMax,jMin,jMax,K
      _RL  tauAB
      _RL  tracer (1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy)
      _RL  gTracer(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy)
      _RL  gTrNm1 (1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy)
      INTEGER myIter, myThid
C     == Local variables ==
      INTEGER i,j
      _RL ab15,ab05

C     Adams-Bashforth timestepping weights
      ab15 = 1.+ tauAB
      ab05 = -tauAB

C     Step forward temperature
      IF ( gad_advection_scheme.EQ.ENUM_CENTERED_2ND
     & .OR.gad_advection_scheme.EQ.ENUM_UPWIND_3RD
     & .OR.gad_advection_scheme.EQ.ENUM_CENTERED_4TH ) THEN
       DO j=jMin,jMax
        DO i=iMin,iMax
          gTrNm1(i,j,k,bi,bj)=tracer(i,j,k,bi,bj)
     &             +deltaTtracer*(
     &                              ab15*gTracer(i,j,k,bi,bj)
     &                             +ab05*gTrNm1(i,j,k,bi,bj)  )
        ENDDO
       ENDDO
      ELSEIF (gad_advection_scheme.EQ.ENUM_FLUX_LIMIT) THEN
       DO j=jMin,jMax
        DO i=iMin,iMax
          gTrNm1(i,j,k,bi,bj)=tracer(i,j,k,bi,bj)
     &             +deltaTtracer*gTracer(i,j,k,bi,bj)
        ENDDO
       ENDDO
      ELSE
       STOP 'TIMESTEP_TRACER: Bad gad_advection_scheme'
      ENDIF

      RETURN
      END
1	jmc	1.2	C $Header: /u/gcmpack/models/MITgcmUV/pkg/generic_advdiff/timestep_tracer.F,v 1.1 2001/05/30 19:34:48 adcroft Exp $
2	adcroft	1.1	C $Name: $
3
4			#include "CPP_OPTIONS.h"
5
6			SUBROUTINE TIMESTEP_TRACER(
7			I bi, bj, iMin, iMax, jMin, jMax, K, tauAB,
8			U tracer, gTracer, gTrNm1,
9			I myIter, myThid )
10			C /==========================================================\
11			C \| S/R TIMESTEP_TRACER \|
12			C \| o Step model tracer field forward in time \|
13			C \==========================================================/
14			IMPLICIT NONE
15
16			C == Global variables ===
17			#include "SIZE.h"
18			#include "EEPARAMS.h"
19			#include "PARAMS.h"
20			#include "GAD.h"
21
22			C == Routine Arguments ==
23			C tauAB - Adams-Bashforth timestepping weight: 0=forward ; 1/2=Adams-Bashf.
24			INTEGER bi,bj,iMin,iMax,jMin,jMax,K
25			_RL tauAB
26			_RL tracer (1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy)
27			_RL gTracer(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy)
28			_RL gTrNm1 (1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy)
29			INTEGER myIter, myThid
30			C == Local variables ==
31			INTEGER i,j
32			_RL ab15,ab05
33
34			C Adams-Bashforth timestepping weights
35			ab15 = 1.+ tauAB
36			ab05 = -tauAB
37
38			C Step forward temperature
39	jmc	1.2	IF ( gad_advection_scheme.EQ.ENUM_CENTERED_2ND
40			& .OR.gad_advection_scheme.EQ.ENUM_UPWIND_3RD
41			& .OR.gad_advection_scheme.EQ.ENUM_CENTERED_4TH ) THEN
42	adcroft	1.1	DO j=jMin,jMax
43			DO i=iMin,iMax
44			gTrNm1(i,j,k,bi,bj)=tracer(i,j,k,bi,bj)
45			& +deltaTtracer*(
46			& ab15*gTracer(i,j,k,bi,bj)
47			& +ab05*gTrNm1(i,j,k,bi,bj) )
48			ENDDO
49			ENDDO
50			ELSEIF (gad_advection_scheme.EQ.ENUM_FLUX_LIMIT) THEN
51			DO j=jMin,jMax
52			DO i=iMin,iMax
53			gTrNm1(i,j,k,bi,bj)=tracer(i,j,k,bi,bj)
54			& +deltaTtracer*gTracer(i,j,k,bi,bj)
55			ENDDO
56			ENDDO
57			ELSE
58			STOP 'TIMESTEP_TRACER: Bad gad_advection_scheme'
59			ENDIF
60
61			RETURN
62			END