/[MITgcm]/MITgcm/model/src/external_fields_load.F
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Revision 1.3 - (hide annotations) (download)
Mon Nov 13 21:40:46 2000 UTC (23 years, 6 months ago) by heimbach
Branch: MAIN
CVS Tags: checkpoint32
Changes since 1.2: +22 -3 lines
Keeping old standard file.

1 heimbach 1.2 C $Header: /u/gcmpack/models/MITgcmUV/model/src/external_fields_load.F,v 1.1 2000/09/11 20:45:57 heimbach Exp $
2 heimbach 1.1
3     #include "CPP_OPTIONS.h"
4    
5     CStartOfInterface
6     SUBROUTINE EXTERNAL_FIELDS_LOAD( myTime, myIter, myThid )
7     C /==========================================================\
8     C | SUBROUTINE EXTERNAL_FIELDS_LOAD |
9     C | o Control reading of fields from external source. |
10     C |==========================================================|
11     C | External source field loading routine. |
12     C | This routine is called every time we want to |
13     C | load a a set of external fields. The routine decides |
14     C | which fields to load and then reads them in. |
15     C | This routine needs to be customised for particular |
16     C | experiments. |
17     C | Notes |
18     C | ===== |
19     C | Two-dimensional and three-dimensional I/O are handled in |
20     C | the following way under MITgcmUV. A master thread |
21     C | performs I/O using system calls. This threads reads data |
22     C | into a temporary buffer. At present the buffer is loaded |
23     C | with the entire model domain. This is probably OK for now|
24     C | Each thread then copies data from the buffer to the |
25     C | region of the proper array it is responsible for. |
26     C | ===== |
27     C | Conversion of flux fields are described in FFIELDS.h |
28     C \==========================================================/
29     IMPLICIT NONE
30    
31     C === Global variables ===
32     #include "SIZE.h"
33     #include "EEPARAMS.h"
34     #include "PARAMS.h"
35     #include "FFIELDS.h"
36     #include "GRID.h"
37 heimbach 1.3 #include "DYNVARS.h"
38 heimbach 1.1
39     C === Routine arguments ===
40     C myThid - Thread no. that called this routine.
41     C myTime - Simulation time
42     C myIter - Simulation timestep number
43     INTEGER myThid
44     _RL myTime
45     INTEGER myIter
46     CEndOfInterface
47    
48     C === Functions ===
49     LOGICAL DIFFERENT_MULTIPLE
50     EXTERNAL DIFFERENT_MULTIPLE
51    
52     C === Local arrays ===
53     COMMON /TDFIELDS/
54     & taux0, tauy0, Qnet0, EmPmR0, SST0, SSS0, Qsw0,
55     & taux1, tauy1, Qnet1, EmPmR1, SST1, SSS1, Qsw1
56     _RS taux0 (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
57     _RS tauy0 (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
58     _RS Qnet0 (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
59     _RS EmPmR0 (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
60     _RS SST0 (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
61     _RS SSS0 (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
62     _RS Qsw0 (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
63     _RS taux1 (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
64     _RS tauy1 (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
65     _RS Qnet1 (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
66     _RS EmPmR1 (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
67     _RS SST1 (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
68     _RS SSS1 (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
69     _RS Qsw1 (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
70    
71     C === Local variables ===
72     INTEGER bi,bj,i,j,intime0,intime1
73    
74     _RL aWght,bWght,rdt
75     INTEGER nForcingPeriods,Imytm,Ifprd,Ifcyc,Iftm
76    
77     IF ( periodicExternalForcing ) THEN
78    
79     C First call requires that we initialize everything to zero for safety
80     IF ( myIter .EQ. nIter0 ) THEN
81     CALL LEF_ZERO( taux0 ,myThid )
82     CALL LEF_ZERO( tauy0 ,myThid )
83     CALL LEF_ZERO( Qnet0 ,myThid )
84     CALL LEF_ZERO( EmPmR0 ,myThid )
85     CALL LEF_ZERO( SST0 ,myThid )
86     CALL LEF_ZERO( SSS0 ,myThid )
87     CALL LEF_ZERO( Qsw0 ,myThid )
88     CALL LEF_ZERO( taux1 ,myThid )
89     CALL LEF_ZERO( tauy1 ,myThid )
90     CALL LEF_ZERO( Qnet1 ,myThid )
91     CALL LEF_ZERO( EmPmR1 ,myThid )
92     CALL LEF_ZERO( SST1 ,myThid )
93     CALL LEF_ZERO( SSS1 ,myThid )
94     CALL LEF_ZERO( Qsw1 ,myThid )
95     ENDIF
96    
97     C Now calculate whether it is time to update the forcing arrays
98     rdt=1. _d 0 / deltaTclock
99     nForcingPeriods=int(externForcingCycle/externForcingPeriod+0.5)
100     Imytm=int(myTime*rdt+0.5)
101     Ifprd=int(externForcingPeriod*rdt+0.5)
102     Ifcyc=int(externForcingCycle*rdt+0.5)
103     Iftm=mod( Imytm+Ifcyc-Ifprd/2 ,Ifcyc)
104    
105     intime0=int(Iftm/Ifprd)
106     intime1=mod(intime0+1,nForcingPeriods)
107     aWght=float( Iftm-Ifprd*intime0 )/float( Ifprd )
108     bWght=1.-aWght
109    
110     intime0=intime0+1
111     intime1=intime1+1
112    
113     IF (
114     & Iftm-Ifprd*(intime0-1) .EQ. 0
115     & .OR. myIter .EQ. nIter0
116     & ) THEN
117    
118     _BEGIN_MASTER(myThid)
119    
120     C If the above condition is met then we need to read in
121     C data for the period ahead and the period behind myTime.
122     write(0,*)
123     & 'S/R LOAD_INTERPOLATE_FORCING: Reading new data',myTime,myIter
124    
125     IF ( zonalWindFile .NE. ' ' ) THEN
126     CALL READ_REC_XY_RS( zonalWindFile,taux0,intime0,myIter,myThid )
127     CALL READ_REC_XY_RS( zonalWindFile,taux1,intime1,myIter,myThid )
128     ENDIF
129     IF ( meridWindFile .NE. ' ' ) THEN
130     CALL READ_REC_XY_RS( meridWindFile,tauy0,intime0,myIter,myThid )
131     CALL READ_REC_XY_RS( meridWindFile,tauy1,intime1,myIter,myThid )
132     ENDIF
133     IF ( surfQFile .NE. ' ' ) THEN
134     CALL READ_REC_XY_RS( surfQFile,Qnet0,intime0,myIter,myThid )
135     CALL READ_REC_XY_RS( surfQFile,Qnet1,intime1,myIter,myThid )
136     ENDIF
137     IF ( EmPmRfile .NE. ' ' ) THEN
138 heimbach 1.3 Cfixed CALL READ_REC_XY_RS( EmPmRfile,EmPmR0,intime0,myIter,myThid )
139     Cfixed CALL READ_REC_XY_RS( EmPmRfile,EmPmR1,intime1,myIter,myThid )
140     CALL READ_REC_XY_RS( EmPmRfile,EmPmR0,1,myIter,myThid )
141     CALL READ_REC_XY_RS( EmPmRfile,EmPmR1,1,myIter,myThid )
142 heimbach 1.1 ENDIF
143     IF ( thetaClimFile .NE. ' ' ) THEN
144     CALL READ_REC_XY_RS( thetaClimFile,SST0,intime0,myIter,myThid )
145     CALL READ_REC_XY_RS( thetaClimFile,SST1,intime1,myIter,myThid )
146     ENDIF
147     IF ( saltClimFile .NE. ' ' ) THEN
148     CALL READ_REC_XY_RS( saltClimFile,SSS0,intime0,myIter,myThid )
149     CALL READ_REC_XY_RS( saltClimFile,SSS1,intime1,myIter,myThid )
150     ENDIF
151     #ifdef SHORTWAVE_HEATING
152     IF ( surfQswFile .NE. ' ' ) THEN
153     CALL READ_REC_XY_RS( surfQswFile,Qsw0,intime0,myIter,myThid )
154     CALL READ_REC_XY_RS( surfQswFile,Qsw1,intime1,myIter,myThid )
155     ENDIF
156     #endif
157    
158     _END_MASTER(myThid)
159     C
160     _EXCH_XY_R4(SST0 , myThid )
161     _EXCH_XY_R4(SST1 , myThid )
162     _EXCH_XY_R4(SSS0 , myThid )
163     _EXCH_XY_R4(SSS1 , myThid )
164     _EXCH_XY_R4(taux0 , myThid )
165     _EXCH_XY_R4(taux1 , myThid )
166     _EXCH_XY_R4(tauy0 , myThid )
167     _EXCH_XY_R4(tauy1 , myThid )
168     _EXCH_XY_R4(Qnet0, myThid )
169     _EXCH_XY_R4(Qnet1, myThid )
170     _EXCH_XY_R4(EmPmR0, myThid )
171     _EXCH_XY_R4(EmPmR1, myThid )
172     #ifdef SHORTWAVE_HEATING
173     _EXCH_XY_R4(Qsw0, myThid )
174     _EXCH_XY_R4(Qsw1, myThid )
175     #endif
176     C
177     ENDIF
178    
179     C-- Interpolate fu,fv,Qnet,EmPmR,SST,SSS,Qsw
180     DO bj = myByLo(myThid), myByHi(myThid)
181     DO bi = myBxLo(myThid), myBxHi(myThid)
182     DO j=1-Oly,sNy+Oly
183     DO i=1-Olx,sNx+Olx
184     SST(i,j,bi,bj) = bWght*SST0(i,j,bi,bj)
185     & +aWght*SST1(i,j,bi,bj)
186     SSS(i,j,bi,bj) = bWght*SSS0(i,j,bi,bj)
187     & +aWght*SSS1(i,j,bi,bj)
188     fu(i,j,bi,bj) = bWght*taux0(i,j,bi,bj)
189     & +aWght*taux1(i,j,bi,bj)
190     fv(i,j,bi,bj) = bWght*tauy0(i,j,bi,bj)
191     & +aWght*tauy1(i,j,bi,bj)
192     Qnet(i,j,bi,bj) = bWght*Qnet0(i,j,bi,bj)
193     & +aWght*Qnet1(i,j,bi,bj)
194     EmPmR(i,j,bi,bj) = bWght*EmPmR0(i,j,bi,bj)
195     & +aWght*EmPmR1(i,j,bi,bj)
196     #ifdef SHORTWAVE_HEATING
197     Qsw(i,j,bi,bj) = bWght*Qsw0(i,j,bi,bj)
198     & +aWght*Qsw1(i,j,bi,bj)
199     #endif
200     ENDDO
201     ENDDO
202     ENDDO
203     ENDDO
204    
205 heimbach 1.3 C Convert units and signs (!)
206 heimbach 1.1 CALL EXTERNAL_FIELDS_SCALE( myThid )
207 heimbach 1.3
208     C-- Diagnostics
209     IF (myThid.EQ.1 .AND. myTime.LT.62208000.) THEN
210     write(0,'(a,1p7e12.4,2i6,2e12.4)')
211     & 'time,SST,SSS,fu,fv,Q,E-P,i0,i1,a,b = ',
212     & myTime,
213     & SST(1,sNy,1,1),SSS(1,sNy,1,1),
214     & fu(1,sNy,1,1),fv(1,sNy,1,1),
215     & Qnet(1,sNy,1,1),EmPmR(1,sNy,1,1),
216     & intime0,intime1,aWght,bWght
217     write(0,'(a,1p7e12.4)')
218     & 'time,fu0,fu1,fu = ',
219     & myTime,
220     & taux0(1,sNy,1,1),taux1(1,sNy,1,1),fu(1,sNy,1,1),
221     & aWght,bWght
222     ENDIF
223 heimbach 1.1
224     C endif for periodicForcing
225     ENDIF
226    
227     RETURN
228     END
229    
230     SUBROUTINE LEF_ZERO( arr ,myThid )
231     C This routine simply sets the argument array to zero
232     C Used only by EXTERNAL_FIELDS_LOAD
233     IMPLICIT NONE
234     C === Global variables ===
235     #include "SIZE.h"
236     #include "EEPARAMS.h"
237     C === Arguments ===
238     _RS arr (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
239     INTEGER myThid
240     C === Local variables ===
241     INTEGER i,j,bi,bj
242    
243     DO bj = myByLo(myThid), myByHi(myThid)
244     DO bi = myBxLo(myThid), myBxHi(myThid)
245     DO j=1-Oly,sNy+Oly
246     DO i=1-Olx,sNx+Olx
247     arr(i,j,bi,bj)=0.
248     ENDDO
249     ENDDO
250     ENDDO
251     ENDDO
252    
253     RETURN
254     END

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