advect_xz/code/ini_theta.F

C $Header: /u/gcmpack/MITgcm/verification/advect_xz/code/ini_theta.F,v 1.2 2005/04/15 22:10:13 jmc Exp $
C $Name:  $

#include "CPP_OPTIONS.h"

CBOP
C     !ROUTINE: INI_THETA
C     !INTERFACE:
      SUBROUTINE INI_THETA( myThid )
C     !DESCRIPTION: \bv
C     *==========================================================*
C     | SUBROUTINE INI_THETA                                      
C     | o Set model initial temperature field.                    
C     *==========================================================*
C     | There are several options for setting the initial         
C     | temperature file                                          
C     |  1. Inline code                                           
C     |  2. Vertical profile ( uniform T in X and Y )             
C     |  3. Three-dimensional data from a file. For example from  
C     |     Levitus or from a checkpoint file from a previous     
C     |     integration.                                          
C     | In addition to setting the temperature field we also      
C     | set the initial temperature tendency term here.           
C     *==========================================================*
C     \ev

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

C     !INPUT/OUTPUT PARAMETERS:
C     == Routine arguments ==
C     myThid -  Number of this instance of INI_THETA
      INTEGER myThid

C     !LOCAL VARIABLES:
C     == Local variables ==
C     bi,bj  - Loop counters
C     I,J,K
C     rD     - Radial displacement of point I,J
      INTEGER bi, bj
      INTEGER I, J, K, localWarnings
      _RL     Tfreezing
      _RL     rD
      CHARACTER*(MAX_LEN_MBUF) msgBuf
CEOP

C--   Initialise temperature field to the vertical reference profile
      DO bj = myByLo(myThid), myByHi(myThid)
       DO bi = myBxLo(myThid), myBxHi(myThid)
        DO K=1,Nr
         DO J=1-Oly,sNy+Oly
          DO I=1-Olx,sNx+Olx
           theta(I,J,K,bi,bj) = tRef(K)
          ENDDO
         ENDDO
C--    Initialise temperature field to a circular patch.
         DO J=1,sNy
          DO I=1,sNx
            rD=sqrt( (XC(i,j,bi,bj)-40.E3)**2
     &              +(YC(i,j,bi,bj)-40.E3)**2
     &              +(RC(k)+50.E3)**2 )
            theta(i,j,k,bi,bj)=exp(-0.5*( rD/20.E3 )**2 )
          ENDDO
         ENDDO
        ENDDO
       ENDDO
      ENDDO

      IF ( hydrogThetaFile .NE. ' ' ) THEN
       _BEGIN_MASTER( myThid )
       CALL READ_FLD_XYZ_RL( hydrogThetaFile, ' ', theta, 0, myThid )
       _END_MASTER(myThid)
       _EXCH_XYZ_R8(theta,myThid)
      ENDIF

C--   Apply mask and test consistency
      localWarnings=0
      DO bj = myByLo(myThid), myByHi(myThid)
       DO bi = myBxLo(myThid), myBxHi(myThid)
        DO K=1,Nr
         DO J=1-Oly,sNy+Oly
          DO I=1-Olx,sNx+Olx
           IF (maskC(I,J,K,bi,bj).EQ.0.) theta(I,J,K,bi,bj) = 0.
          ENDDO
         ENDDO
         IF ( tRef(k).NE.0. ) THEN
          DO J=1,sNy
           DO I=1,sNx
            IF (  maskC(I,J,K,bi,bj).NE.0.
     &      .AND. theta(I,J,K,bi,bj).EQ.0. ) THEN
              localWarnings=localWarnings+1
            ENDIF
           ENDDO
          ENDDO
         ENDIF
        ENDDO
       ENDDO
      ENDDO
      IF (localWarnings.NE.0) THEN
       WRITE(msgBuf,'(A,A)')
     &  'S/R INI_THETA: theta = 0 identically. If this is intentional',
     &  'you will need to edit ini_theta.F to avoid this safety check'
       CALL PRINT_ERROR( msgBuf , myThid)
       STOP 'ABNORMAL END: S/R INI_THETA'
      ENDIF

C--   Check that there are no values of temperature below freezing point.
      Tfreezing=-1.9 _d 0
      IF ( allowFreezing ) THEN
       DO bj = myByLo(myThid), myByHi(myThid)
        DO bi = myBxLo(myThid), myBxHi(myThid)
         DO K=1,Nr
          DO J=1-Oly,sNy+Oly
           DO I=1-Olx,sNx+Olx
            IF (theta(I,J,k,bi,bj) .LT. Tfreezing) THEN
               theta(I,J,K,bi,bj) = Tfreezing
            ENDIF
           ENDDO
          ENDDO
         ENDDO
        ENDDO
       ENDDO
      ENDIF

      _EXCH_XYZ_R8(theta,myThid)

      CALL PLOT_FIELD_XYZRL( theta, 'Initial Temperature' ,
     &                       Nr, 1, myThid )

      RETURN
      END
1	C $Header: /u/gcmpack/MITgcm/verification/advect_xz/code/ini_theta.F,v 1.2 2005/04/15 22:10:13 jmc Exp $
2	C $Name: $
3
4	#include "CPP_OPTIONS.h"
5
6	CBOP
7	C !ROUTINE: INI_THETA
8	C !INTERFACE:
9	SUBROUTINE INI_THETA( myThid )
10	C !DESCRIPTION: \bv
11	C ==========================================================
12	C \| SUBROUTINE INI_THETA
13	C \| o Set model initial temperature field.
14	C ==========================================================
15	C \| There are several options for setting the initial
16	C \| temperature file
17	C \| 1. Inline code
18	C \| 2. Vertical profile ( uniform T in X and Y )
19	C \| 3. Three-dimensional data from a file. For example from
20	C \| Levitus or from a checkpoint file from a previous
21	C \| integration.
22	C \| In addition to setting the temperature field we also
23	C \| set the initial temperature tendency term here.
24	C ==========================================================
25	C \ev
26
27	C !USES:
28	IMPLICIT NONE
29	C === Global variables ===
30	#include "SIZE.h"
31	#include "EEPARAMS.h"
32	#include "PARAMS.h"
33	#include "GRID.h"
34	#include "DYNVARS.h"
35
36	C !INPUT/OUTPUT PARAMETERS:
37	C == Routine arguments ==
38	C myThid - Number of this instance of INI_THETA
39	INTEGER myThid
40
41	C !LOCAL VARIABLES:
42	C == Local variables ==
43	C bi,bj - Loop counters
44	C I,J,K
45	C rD - Radial displacement of point I,J
46	INTEGER bi, bj
47	INTEGER I, J, K, localWarnings
48	_RL Tfreezing
49	_RL rD
50	CHARACTER*(MAX_LEN_MBUF) msgBuf
51	CEOP
52
53	C-- Initialise temperature field to the vertical reference profile
54	DO bj = myByLo(myThid), myByHi(myThid)
55	DO bi = myBxLo(myThid), myBxHi(myThid)
56	DO K=1,Nr
57	DO J=1-Oly,sNy+Oly
58	DO I=1-Olx,sNx+Olx
59	theta(I,J,K,bi,bj) = tRef(K)
60	ENDDO
61	ENDDO
62	C-- Initialise temperature field to a circular patch.
63	DO J=1,sNy
64	DO I=1,sNx
65	rD=sqrt( (XC(i,j,bi,bj)-40.E3)**2
66	& +(YC(i,j,bi,bj)-40.E3)**2
67	& +(RC(k)+50.E3)**2 )
68	theta(i,j,k,bi,bj)=exp(-0.5( rD/20.E3 )*2 )
69	ENDDO
70	ENDDO
71	ENDDO
72	ENDDO
73	ENDDO
74
75	IF ( hydrogThetaFile .NE. ' ' ) THEN
76	_BEGIN_MASTER( myThid )
77	CALL READ_FLD_XYZ_RL( hydrogThetaFile, ' ', theta, 0, myThid )
78	_END_MASTER(myThid)
79	_EXCH_XYZ_R8(theta,myThid)
80	ENDIF
81
82	C-- Apply mask and test consistency
83	localWarnings=0
84	DO bj = myByLo(myThid), myByHi(myThid)
85	DO bi = myBxLo(myThid), myBxHi(myThid)
86	DO K=1,Nr
87	DO J=1-Oly,sNy+Oly
88	DO I=1-Olx,sNx+Olx
89	IF (maskC(I,J,K,bi,bj).EQ.0.) theta(I,J,K,bi,bj) = 0.
90	ENDDO
91	ENDDO
92	IF ( tRef(k).NE.0. ) THEN
93	DO J=1,sNy
94	DO I=1,sNx
95	IF ( maskC(I,J,K,bi,bj).NE.0.
96	& .AND. theta(I,J,K,bi,bj).EQ.0. ) THEN
97	localWarnings=localWarnings+1
98	ENDIF
99	ENDDO
100	ENDDO
101	ENDIF
102	ENDDO
103	ENDDO
104	ENDDO
105	IF (localWarnings.NE.0) THEN
106	WRITE(msgBuf,'(A,A)')
107	& 'S/R INI_THETA: theta = 0 identically. If this is intentional',
108	& 'you will need to edit ini_theta.F to avoid this safety check'
109	CALL PRINT_ERROR( msgBuf , myThid)
110	STOP 'ABNORMAL END: S/R INI_THETA'
111	ENDIF
112
113	C-- Check that there are no values of temperature below freezing point.
114	Tfreezing=-1.9 _d 0
115	IF ( allowFreezing ) THEN
116	DO bj = myByLo(myThid), myByHi(myThid)
117	DO bi = myBxLo(myThid), myBxHi(myThid)
118	DO K=1,Nr
119	DO J=1-Oly,sNy+Oly
120	DO I=1-Olx,sNx+Olx
121	IF (theta(I,J,k,bi,bj) .LT. Tfreezing) THEN
122	theta(I,J,K,bi,bj) = Tfreezing
123	ENDIF
124	ENDDO
125	ENDDO
126	ENDDO
127	ENDDO
128	ENDDO
129	ENDIF
130
131	_EXCH_XYZ_R8(theta,myThid)
132
133	CALL PLOT_FIELD_XYZRL( theta, 'Initial Temperature' ,
134	& Nr, 1, myThid )
135
136	RETURN
137	END