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|
C Copyright 1981-2007 ECMWF
C
C Licensed under the GNU Lesser General Public License which
C incorporates the terms and conditions of version 3 of the GNU
C General Public License.
C See LICENSE and gpl-3.0.txt for details.
C
INTEGER FUNCTION INTUVU( PVYIN, PDVIN, INLEN,
X PUOUT, PVOUT, OUTLEN)
C
C---->
C**** INTUVU
C
C Purpose
C -------
C
C Interpolate unpacked input vorticity and divergence field to
C unpacked U and V fields.
C
C
C Interface
C ---------
C
C IRET = INTUVU( PVYIN, PDVIN, INLEN, PUOUT,PVOUT,OUTLEN)
C
C Input
C -----
C
C PVYIN - Input vorticity field (unpacked array).
C PDVIN - Input divergence field (unpacked array).
C INLEN - Input field length (words).
C
C
C Output
C ------
C
C PUOUT - Output U field (unpacked array).
C PVOUT - Output V field (unpacked array).
C OUTLEN - Output field length (words).
C
C
C Method
C ------
C
C Convert spectral vorticity/divergence to spectral U/V and then
C interpolate U and V to output fields.
C
C
C Externals
C ---------
C
C JVOD2UV - Converts spectral vorticity/divergence to spectral U/V.
C JMEMHAN - Allocate scratch memory.
C INTFAU - Prepare to interpolate unpacked input field.
C INTFBU - Interpolate unpacked input field.
C INTLOG - Log error message.
C
C
C Author
C ------
C
C J.D.Chambers ECMWF Feb 1995
C
C J.D.Chambers ECMWF Feb 1997
C Allow for 64-bit pointers
C
C----<
C
IMPLICIT NONE
C
C Function arguments
C
INTEGER INLEN, OUTLEN
REAL PVYIN(INLEN), PDVIN(INLEN), PUOUT(*), PVOUT(*)
C
#include "parim.h"
#include "nifld.common"
#include "nofld.common"
#include "grfixed.h"
#include "intf.h"
C
C Parameters
C
INTEGER JPROUTINE, JPALLOC, JPDEALL, JPSCR3, JPSCR4, JPSCR5
PARAMETER (JPROUTINE = 27000 )
PARAMETER (JPALLOC = 1)
PARAMETER (JPDEALL = 0)
PARAMETER (JPSCR3 = 3)
PARAMETER (JPSCR4 = 4)
PARAMETER (JPSCR5 = 5)
C
C Local variables
C
REAL EW, NS
LOGICAL LOLDWIND, LSPECUV
INTEGER IERR, KPR, ISZUV, ISIZE, NOLD, IPDIV, IDIVOFF
INTEGER NEXT, LOOP, MTRUNC, NTRUNC, NTROLD, NTROLD2, IPVORT
INTEGER KK
C
LOGICAL LFIRST, LNEWUV
CHARACTER*3 EXTRA
DATA LFIRST/.TRUE./, LNEWUV/.TRUE./, EXTRA/'NO '/
SAVE LFIRST, LNEWUV
C
DATA NTROLD/-1/, NTROLD2/-1/
SAVE NTROLD, NTROLD2
INTEGER IP_U, IP_V
#ifdef POINTER_64
INTEGER*8 IZNFLDO
#endif
REAL ZNFLDO
POINTER ( IZNFLDO, ZNFLDO )
DIMENSION ZNFLDO( 1 )
#ifdef POINTER_64
INTEGER*8 IUV
#endif
REAL UV
POINTER ( IUV, UV )
DIMENSION UV( 1 )
C
C Externals
C
INTEGER INTFAU, INTFBU, AURESOL
C
C -----------------------------------------------------------------|
C* Section 1. Initialise
C -----------------------------------------------------------------|
C
100 CONTINUE
INTUVU = 0
IERR = 0
KPR = 0
C
IF( LFIRST ) THEN
CALL GETENV('IGNORE_UV_EXTRA_MODE', EXTRA)
IF((EXTRA(1:1).EQ.'Y').OR.(EXTRA(1:1).EQ.'y')) LNEWUV = .FALSE.
IF( LNEWUV ) THEN
CALL INTLOG(JP_DEBUG,
X 'INTUVU: IGNORE_UV_EXTRA_MODE not turned on',JPQUIET)
ELSE
CALL INTLOG(JP_DEBUG,
X 'INTUVU: IGNORE_UV_EXTRA_MODE turned on',JPQUIET)
ENDIF
LFIRST = .FALSE.
ENDIF
C
NOLD = NIRESO
C
LSPECUV = (NOREPR.EQ.JPSPHERE).OR.(NOREPR.EQ.JPSPHROT)
C
C -----------------------------------------------------------------|
C* Section 2. Convert spectral vorticity/divergence to spectral U/V
C -----------------------------------------------------------------|
C
200 CONTINUE
C
IF( LSPECUV ) THEN
C
C Spectral U and V for Tn are to be generated from vorticity
C and divergence spectral T(n-1)
C
IF( LARESOL.AND.LNEWUV ) THEN
IF( (NOGRID(1).NE.0).AND.(NOGRID(2).NE.0) ) THEN
EW = FLOAT(NOGRID(1))/PPMULT
NS = FLOAT(NOGRID(2))/PPMULT
NTRUNC = AURESOL(NS,EW) - 1
ELSE IF( NOGAUSS.NE.0 ) THEN
EW = 90.0/FLOAT(NOGAUSS)
NS = EW
NTRUNC = AURESOL(NS,EW) - 1
ELSE IF( LNORESO ) THEN
NTRUNC = NORESO - 1
ELSE
NTRUNC = NIRESO - 1
ENDIF
IF( NTRUNC.GT.(NIRESO-1) ) NTRUNC = NIRESO - 1
C
ELSE IF( LNORESO ) THEN
NTRUNC = NORESO - 1
ELSE
NTRUNC = NIRESO - 1
ENDIF
C
IF( LNEWUV ) THEN
MTRUNC = NTRUNC + 1
ELSE
NTRUNC = NTRUNC + 1
MTRUNC = NTRUNC
ENDIF
C
C -----------------------------------------------------------------|
C Use old-style processing if IGNORE_UV_EXTRA_MODE = Y
C -----------------------------------------------------------------|
C
IF( .NOT.LNEWUV ) THEN
C
CALL INTLOG(JP_DEBUG,'INTUVU: vo/div truncation = ', NIRESO)
C
C Get scratch memory for U and V spectral fields.
C U and V memory areas are adjacent.
C
ISZUV = (NIRESO+1)*(NIRESO+2)
IP_U = 1
IP_V = 1 + ISZUV
CALL JMEMHAN( JPSCR3, IUV, ISZUV*2, JPALLOC, IERR)
IF ( IERR .NE. 0 ) THEN
CALL INTLOG(JP_ERROR,'INTUVU: Memory allocn fail',JPQUIET)
INTUVU = IERR
GOTO 900
ENDIF
C
C Generate U and V with same truncation as input fields.
C
CALL INTLOG(JP_DEBUG,
X 'INTUVU: Make intermediate U/V with truncation = ', NIRESO)
C
CALL JVOD2UV(PVYIN,PDVIN,NIRESO,UV(IP_U),UV(IP_V),NIRESO)
C
C Is the output a truncated spectral field?
C
IF( LNORESO ) THEN
C
CALL INTLOG(JP_DEBUG,
X 'INTUVU: Produce spectral output with truncation',NORESO)
C
ISIZE = (NORESO+1)*(NORESO+2)
CALL JMEMHAN( JPSCR5, IZNFLDO, ISIZE, JPALLOC, IERR)
IF( IERR.NE.0 ) THEN
CALL INTLOG(JP_FATAL,'INTUVU: Get scratch fail',JPQUIET)
INTUVU = JPROUTINE + 2
GOTO 900
ENDIF
C
CALL SH2SH( UV(IP_U), NIRESO, ZNFLDO, NORESO )
DO LOOP = 1, ISIZE
PUOUT(LOOP) = ZNFLDO(LOOP)
ENDDO
C
CALL SH2SH( UV(IP_V), NIRESO, ZNFLDO, NORESO )
DO LOOP = 1, ISIZE
PVOUT(LOOP) = ZNFLDO(LOOP)
ENDDO
C
NIRESO = NORESO
C
OUTLEN = ISZUV
GOTO 900
C
ENDIF
C
C -----------------------------------------------------------------|
C Use new-style processing if IGNORE_UV_EXTRA_MODE not set
C -----------------------------------------------------------------|
C
ELSE
C
CALL INTLOG(JP_DEBUG,'INTUVU: vo/div truncation = ', NTRUNC)
CALL INTLOG(JP_DEBUG,'INTUVU: U/V truncation = ', MTRUNC)
C
C Truncate vorticity and divergence to correspond to U/V
C
ISIZE = (MTRUNC+1)*(MTRUNC+2)
CALL JMEMHAN( JPSCR5, IZNFLDO, ISIZE*2, JPALLOC, IERR)
IF( IERR.NE.0 ) THEN
CALL INTLOG(JP_ERROR,
X 'INTUVU: Scratch memory type 5 allocn failed.',JPQUIET)
INTUVU = JPROUTINE + 4
GOTO 900
ENDIF
C
IPVORT = 1
CALL SH2SH( PVYIN, NIRESO, ZNFLDO, NTRUNC )
C
IPDIV = IPVORT + (NIRESO+1)*(NIRESO+2)
IDIVOFF = 1 + (NTRUNC+1)*(NTRUNC+2)
CALL SH2SH( PDVIN, NIRESO, ZNFLDO(IDIVOFF), NTRUNC )
C
C Get scratch memory for U and V spectral fields.
C U and V memory areas are adjacent.
C
ISZUV = (MTRUNC+1)*(MTRUNC+2)
IP_U = 1
IP_V = 1 + ISZUV
C
ISIZE = ISZUV*2
CALL JMEMHAN( JPSCR3, IUV, ISIZE, JPALLOC, IERR)
IF ( IERR .NE. 0 ) THEN
CALL INTLOG(JP_ERROR,
X 'INTUVU: Scratch memory type 3 allocation failed.',JPQUIET)
INTUVU = IERR
GOTO 900
ENDIF
C
C Generate U and V spectral fields
C
CALL JVOD2UV(ZNFLDO(IPVORT),ZNFLDO(IDIVOFF),NTRUNC,
X UV(IP_U),UV(IP_V),MTRUNC)
C
DO LOOP = 1, ISZUV
PUOUT(LOOP) = UV(LOOP)
ENDDO
C
KK = 1
DO LOOP = IP_V, IP_V+ISZUV-1
PVOUT(KK) = UV(LOOP)
KK = KK+1
ENDDO
C
OUTLEN = ISZUV
C
GOTO 900
C
ENDIF
C
ENDIF
C
C -----------------------------------------------------------------|
C* Section 3. Generate grid point GRIB format U and V fields.
C -----------------------------------------------------------------|
C
300 CONTINUE
C
C Spectral U and V for Tn are to be generated from vorticity
C and divergence spectral T(n-1)
C
C See whether or not the 'autoresol' flag is set.
C If not, use the input truncation.
C
IF( LARESOL ) THEN
IF( (NOREPR.EQ.JPREGULAR).OR.(NOREPR.EQ.JPREGROT) ) THEN
EW = FLOAT(NOGRID(1))/PPMULT
NS = FLOAT(NOGRID(2))/PPMULT
ELSE
EW = 90.0/FLOAT(NOGAUSS)
NS = EW
ENDIF
NTRUNC = AURESOL(EW,NS)
IF( NTRUNC.NE.NTROLD ) THEN
NTROLD = NTRUNC
CALL INTLOG(JP_WARN,
X 'INTUVU: Resolution automatically set to ', NTRUNC)
ENDIF
ELSE IF( LNORESO ) THEN
NTRUNC = NORESO
ELSE
NTRUNC = NIRESO
ENDIF
C
C Check whether the output resolution is greater than the input
C
IF( NTRUNC.GT.NIRESO ) THEN
C
C Issue warning if the output resolution was user-supplied
C
IF( .NOT.LARESOL ) THEN
C
C Revert to the input truncation
C
IF( NIRESO.NE.NTROLD2 ) THEN
CALL INTLOG(JP_WARN,
X 'INTUVU: spectral -> grid point interpolation',JPQUIET)
CALL INTLOG(JP_WARN,
X 'INTUVU: User supplied resolution = ',NTRUNC)
CALL INTLOG(JP_WARN,
X 'INTUVU: Input field resolution = ',NIRESO)
CALL INTLOG(JP_WARN,
X 'INTUVU: User supplied resolution ignored',JPQUIET)
CALL INTLOG(JP_WARN,
X 'INTUVU: Input field resolution has been used',JPQUIET)
NTROLD2 = NIRESO
ENDIF
NTRUNC = NIRESO
C
ELSE
C
C Revert to the input truncation
C
NTRUNC = NIRESO
IF( NTRUNC.NE.NTROLD2 ) THEN
NTROLD2 = NTRUNC
CALL INTLOG(JP_WARN,
X 'INTUVU: Automatic resolution selectn too high',JPQUIET)
CALL INTLOG(JP_WARN,
X 'INTUVU: Resolution reset to input resolution: ',NTRUNC)
ENDIF
C
ENDIF
ENDIF
C
C IF extra mode is in use, adjust the calculated truncation.
C
MTRUNC = NTRUNC
IF( LNEWUV ) NTRUNC = MTRUNC - 1
C
CALL INTLOG(JP_DEBUG,'INTUVU: vo/div truncation = ', NTRUNC)
CALL INTLOG(JP_DEBUG,'INTUVU: U/V truncation = ', MTRUNC)
C
ISIZE = (MTRUNC+1)*(MTRUNC+2)
CALL JMEMHAN( JPSCR5, IZNFLDO, ISIZE*2, JPALLOC, IERR)
IF( IERR.NE.0 ) THEN
CALL INTLOG(JP_FATAL,
X 'INTUVU: Get scratch space failed',JPQUIET)
INTUVU = JPROUTINE + 2
GOTO 900
ENDIF
C
C Adjust the vorticity and divergence by one wave number before
C conversion to U and V
C
IPVORT = 1
IDIVOFF = 1 + (NTRUNC+1)*(NTRUNC+2)
C
CALL SH2SH( PVYIN, NIRESO, ZNFLDO, NTRUNC )
C
CALL SH2SH( PDVIN, NIRESO, ZNFLDO(IDIVOFF), NTRUNC )
C
C Get scratch memory for U and V spectral fields.
C U and V memory areas are adjacent.
C
ISZUV = (MTRUNC+1)*(MTRUNC+2)
IP_U = 1
IP_V = IP_U + ISZUV
C
ISIZE = ISZUV*2
CALL JMEMHAN( JPSCR3, IUV, ISIZE, JPALLOC, IERR)
IF( IERR.NE.0 ) THEN
CALL INTLOG(JP_ERROR,
X 'INTUVU: Scratch memory type 3 allocation failed.',JPQUIET)
INTUVU = IERR
GOTO 900
ENDIF
C
C Generate U and V spectral fields
C
CALL JVOD2UV(ZNFLDO(IPVORT),ZNFLDO(IDIVOFF),NTRUNC,
X UV(IP_U),UV(IP_V),MTRUNC)
C
NIRESO = MTRUNC
C
C -----------------------------------------------------------------|
C* Section 4. Interpolate U field.
C -----------------------------------------------------------------|
C
400 CONTINUE
C
NIFORM = 0
NIPARAM = JP_U
LWIND = .TRUE.
LOLDWIND = LWINDSET
LWINDSET = .TRUE.
C
IERR = INTFAU( UV(IP_U), ISZUV, PUOUT, OUTLEN)
IF ( IERR .NE. 0 ) THEN
CALL INTLOG(JP_ERROR,
X 'INTUVU: Prepare to interpolate failed.',JPQUIET)
INTUVU = IERR
GOTO 900
ENDIF
C
IERR = INTFBU( UV(IP_U), ISZUV, PUOUT, OUTLEN)
C
IF ( IERR .NE. 0 ) THEN
CALL INTLOG(JP_ERROR,'INTUVU: Interpolation failed.',JPQUIET)
INTUVU = IERR
GOTO 900
ENDIF
C
C -----------------------------------------------------------------|
C* Section 5. Interpolate V field.
C -----------------------------------------------------------------|
C
500 CONTINUE
C
NIPARAM = JP_V
IERR = INTFAU( UV(IP_V), ISZUV, PVOUT, OUTLEN)
IF ( IERR .NE. 0 ) THEN
CALL INTLOG(JP_ERROR,
X 'INTUVU: Prepare to interpolate failed.',JPQUIET)
INTUVU = IERR
GOTO 900
ENDIF
C
IERR = INTFBU( UV(IP_V), ISZUV, PVOUT, OUTLEN)
C
IF ( IERR .NE. 0 ) THEN
CALL INTLOG(JP_ERROR,
X 'INTUVU: Prepare to interpolate failed.',JPQUIET)
INTUVU = IERR
GOTO 900
ENDIF
C
C -----------------------------------------------------------------|
C* Section 9. Closedown.
C -----------------------------------------------------------------|
C
900 CONTINUE
C
C Clear change flags for next product processing
LCHANGE = .FALSE.
LSMCHNG = .FALSE.
LWINDSET = LOLDWIND
C
NIRESO = NOLD
C
RETURN
END
|
