model/src/timestep_tracer.F

C $Header: /u/gcmpack/MITgcm/model/src/timestep_tracer.F,v 1.13 2007/01/09 22:24:29 jmc Exp $
C $Name:  $

#include "CPP_OPTIONS.h"

CBOP
C     !ROUTINE: TIMESTEP_TRACER
C     !INTERFACE:
      SUBROUTINE TIMESTEP_TRACER(
     I                     bi, bj, iMin, iMax, jMin, jMax, K,
     I                     advection_scheme, deltaTloc,
     I                     tracer, gTracer,
     I                     myIter, myThid )
C     !DESCRIPTION: \bv
C     *==========================================================*
C     | S/R TIMESTEP_TRACER                                       
C     | o Step model tracer field forward in time                 
C     *==========================================================*
C     \ev

C     !USES:
      IMPLICIT NONE
C     == Global variables ===
#include "SIZE.h"
#include "EEPARAMS.h"
#include "PARAMS.h"

C     !INPUT/OUTPUT PARAMETERS:
C     == Routine Arguments ==
      INTEGER bi,bj,iMin,iMax,jMin,jMax,K
      INTEGER advection_scheme
      _RL     deltaTloc
      _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)
      INTEGER myIter, myThid

C     !LOCAL VARIABLES:
C     == Local variables ==
      INTEGER i,j
CEOP

C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----|

C-    Extrapolate tendencies to mid-time level (n+1/2)
      DO j=jMin,jMax
       DO i=iMin,iMax
         gTracer(i,j,k,bi,bj)=tracer(i,j,k,bi,bj)
     &            +deltaTloc*gTracer(i,j,k,bi,bj)
       ENDDO
      ENDDO

      RETURN
      END
1	jahn	1.14	C $Header: /u/gcmpack/MITgcm/model/src/timestep_tracer.F,v 1.13 2007/01/09 22:24:29 jmc Exp $
2	adcroft	1.2	C $Name: $
3	adcroft	1.1
4			#include "CPP_OPTIONS.h"
5
6	cnh	1.8	CBOP
7			C !ROUTINE: TIMESTEP_TRACER
8			C !INTERFACE:
9	adcroft	1.2	SUBROUTINE TIMESTEP_TRACER(
10	adcroft	1.4	I bi, bj, iMin, iMax, jMin, jMax, K,
11	jahn	1.14	I advection_scheme, deltaTloc,
12	adcroft	1.4	I tracer, gTracer,
13	adcroft	1.2	I myIter, myThid )
14	cnh	1.8	C !DESCRIPTION: \bv
15			C ==========================================================
16			C \| S/R TIMESTEP_TRACER
17			C \| o Step model tracer field forward in time
18			C ==========================================================
19			C \ev
20
21			C !USES:
22	adcroft	1.2	IMPLICIT NONE
23			C == Global variables ===
24	adcroft	1.1	#include "SIZE.h"
25			#include "EEPARAMS.h"
26			#include "PARAMS.h"
27	adcroft	1.2
28	cnh	1.8	C !INPUT/OUTPUT PARAMETERS:
29	adcroft	1.1	C == Routine Arguments ==
30			INTEGER bi,bj,iMin,iMax,jMin,jMax,K
31	adcroft	1.4	INTEGER advection_scheme
32	jahn	1.14	_RL deltaTloc
33	adcroft	1.1	_RL tracer (1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy)
34			_RL gTracer(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy)
35			INTEGER myIter, myThid
36	cnh	1.8
37			C !LOCAL VARIABLES:
38	adcroft	1.1	C == Local variables ==
39			INTEGER i,j
40	cnh	1.8	CEOP
41	adcroft	1.1
42	jmc	1.5	C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-\|--+----\|
43
44	jmc	1.13	C- Extrapolate tendencies to mid-time level (n+1/2)
45	jmc	1.5	DO j=jMin,jMax
46			DO i=iMin,iMax
47	adcroft	1.7	gTracer(i,j,k,bi,bj)=tracer(i,j,k,bi,bj)
48	jahn	1.14	& +deltaTloc*gTracer(i,j,k,bi,bj)
49	jmc	1.5	ENDDO
50			ENDDO
51	adcroft	1.1
52			RETURN
53			END