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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 IAIDEF (KSEC1, KSEC2, KIAREA, KLLEN, OICHNG,
1 KPR, KERR)
C
C---->
C**** *IAIDEF*
C
C PURPOSE
C _______
C
C Generate an input field definition from the GRIB definition.
C
C INTERFACE
C _________
C
C IERR = IAIDEF (KSEC1, KSEC2, KIAREA, KLLEN, OICHNG, KPR, KERR)
C
C Input parameters
C ________________
C
C KSEC1 - The GRIB Section 1 array for the input field.
C
C KSEC2 - The GRIB Section 2 array for the input field.
C
C KIAREA - The previous input field area used for comparison.
C
C KLLEN - The previous latitude line lengths for a quasi
C regular Gaussian field used for comparison.
C
C KPR - The debug print switch.
C 0 , No debugging output.
C 1 , Produce debugging output.
C
C KERR - The error control flag.
C -ve, No error message. Return error code.
C 0 , Hard failure with error message.
C +ve, Print error message. Return error code.
C
C Output parameters
C ________________
C
C KIAREA - The area for this field.
C
C KLLEN - The latitude line lengths for a quasi regular
C Gaussian field.
C
C OICHNG - A flag indicating whether the field definition has
C changed since the previous call to this routine.
C
C Return value
C ____________
C
C The error indicator (INTEGER).
C
C Error and Warning Return Values
C _______________________________
C
C 21701 The data representation was not valid.
C 21702 The scan mode was not valid.
C
C Common block usage
C __________________
C
C nifld.common - This file contains all the input field
C definition variables.
C
C LSMCHNG - LSM change flag is set.
C LSM - LSM usage flag is set.
C LSMPAR - LSM parameter flag is set.
C LPREC - Precipitation flag is set.
C LWIND - Wind flag is set.
C
C NIGAUSS - Input field Gaussian truncation is used and set.
C NIGRID - Input field grid definition (WE/NS) is used and
C set.
C NINS - Number of grid points in NS direction for input
C field is used and set.
C NIPARAM - Input field parameter number is used and set.
C NIREPR - Input field representation is used and set.
C NISCNM - Input field scanning mode is set.
C NITABLE - Input field table number is used and set.
C NIWE - Number of grid points in WE direction for input
C field is used and set.
C
C EXTERNALS
C _________
C
C PRECIP - Says if field is to have 'precipitation' treatment
C SETPAR - Standard routine used to generate "missing" data
C values for GRIB fields.
C INTLOG - Logs messages.
C
C METHOD
C ______
C
C This routine uses sections 1 and 2 of the input GRIB field to
C generate the input field definition. This definition is
C compared with the previous field definition to see if any
C change of definition has occurred.
C
C REFERENCE
C _________
C
C None
C
C COMMENTS
C ________
C
C Program contains sections 0 to 3 and 9
C
C AUTHOR
C ______
C
C K. Fielding *ECMWF* Apr 1994
C
C MODIFICATIONS
C _____________
C
C None
C
C----<
C _______________________________________________________
C
C
C* Section 0. Definition of variables.
C _______________________________________________________
C
C* Prefix conventions for variable names
C
C Logical L (but not LP), global or common.
C O, dummy argument
C G, local variable
C LP, parameter.
C Character C, global or common.
C H, dummy argument
C Y (but not YP), local variable
C YP, parameter.
C Integer M and N, global or common.
C K, dummy argument
C I, local variable
C J (but not JP), loop control
C JP, parameter.
C REAL A to F and Q to X, global or common.
C P (but not PP), dummy argument
C Z, local variable
C PP, parameter.
C
C Implicit statement to force declarations
C
IMPLICIT NONE
C
#include "parim.h"
#include "nifld.common"
C
C Subroutine arguments
LOGICAL OICHNG
INTEGER KPR, KERR
INTEGER KSEC1 (JPGRIB_ISEC1), KSEC2 (JPGRIB_ISEC2), KIAREA (4)
INTEGER KLLEN (*)
C
C Local variables
LOGICAL GNLSM
INTEGER ITEMP, IMISS, IWEST, IEAST, IERR
INTEGER JSET
INTEGER JPROUTINE
PARAMETER (JPROUTINE = 21700)
C
C External functions
C
LOGICAL PRECIP
C
C _______________________________________________________
C
C* Section 1. Initialisation
C _______________________________________________________
C
100 CONTINUE
C
IF (KPR.GE.1) CALL INTLOG(JP_DEBUG,'IAIDEF: Section 1.',JPQUIET)
C
IAIDEF = 0
IERR = 0
OICHNG = .FALSE.
C
C Get GRIB missing data value
C
CALL SETPAR (ITEMP, IMISS, KPR)
C
C _______________________________________________________
C
C* Section 2. Set Grib Section 2 variables and check consistency
C _______________________________________________________
C
200 CONTINUE
C
IF (KPR.GE.1) CALL INTLOG(JP_DEBUG,'IAIDEF: Section 2.',JPQUIET)
C
C Representation
C
IF (KSEC2 (JPSEC2_REP) .EQ. JPGAUSSIAN .AND.
1 KSEC2 (JPSEC2_QUASI) .EQ. 1) THEN
ITEMP = JPQUASI
ELSE
ITEMP = KSEC2 (JPSEC2_REP)
ENDIF
C
IF (ITEMP .NE. NIREPR) THEN
NIREPR = ITEMP
OICHNG = .TRUE.
ENDIF
C
C Only grid point input data allowed now
C
IF (NIREPR .NE. JPQUASI .AND. NIREPR .NE. JPGAUSSIAN .AND.
X NIREPR .NE. JPREGULAR) THEN
IAIDEF = JPROUTINE + 1
IF (KERR .GE. 0) THEN
CALL INTLOG(JP_ERROR,
X 'IAIDEF: Illegal input representation = ',NIREPR)
IF (KERR .EQ. 0) CALL INTLOG(JP_FATAL,
X 'IAIDEF: Interpolation failing.',JPQUIET)
ENDIF
GO TO 900
ENDIF
C
C scan mode
C
NISCNM = KSEC2 (JPSEC2_SCAN)
C
IF (NISCNM .NE. 0) THEN
IAIDEF = JPROUTINE + 2
IF (KERR .GE. 0) THEN
CALL INTLOG(JP_ERROR,'IAIDEF: Illegal scan mode = ',NISCNM)
IF (KERR .EQ. 0) CALL INTLOG(JP_FATAL,
X 'IAIDEF: Interpolation failing.',JPQUIET)
ENDIF
GO TO 900
ENDIF
C
C Number of lines North-South and West-East
C
IF (KSEC2 (JPSEC2_NLAT) .NE. NINS) THEN
NINS = KSEC2 (JPSEC2_NLAT)
OICHNG = .TRUE.
ENDIF
C
IF (NIREPR.NE.JPQUASI .AND. KSEC2(JPSEC2_NLONG).NE.NIWE) THEN
NIWE = KSEC2 (JPSEC2_NLONG)
OICHNG = .TRUE.
ENDIF
C
C North, South, West and East limits
C
IF (KSEC2 (JPSEC2_NORTH) * 10 .NE. KIAREA (JPNORTH) ) THEN
KIAREA (JPNORTH) = KSEC2 (JPSEC2_NORTH) * 10
OICHNG = .TRUE.
ENDIF
C
IF (KSEC2 (JPSEC2_SOUTH) * 10 .NE. KIAREA (JPSOUTH) ) THEN
KIAREA (JPSOUTH) = KSEC2 (JPSEC2_SOUTH) * 10
OICHNG = .TRUE.
ENDIF
C
IWEST = KSEC2 (JPSEC2_WEST) * 10
C
C Make West and East points an ordered pair
C
IF (NIREPR .EQ. JPQUASI) THEN
IEAST = 0
ELSE
IEAST = KSEC2 (JPSEC2_EAST) * 10
C
IF (IEAST .LT. IWEST) THEN
IF (IEAST .LE. 0) THEN
IEAST = IEAST + JP360
ELSE
IWEST = IWEST - JP360
ENDIF
ENDIF
ENDIF
C
IF (IEAST .NE. KIAREA (JPEAST) ) THEN
KIAREA (JPEAST) = IEAST
OICHNG = .TRUE.
ENDIF
C
IF (IWEST .NE. KIAREA (JPWEST) ) THEN
KIAREA (JPWEST) = IWEST
OICHNG = .TRUE.
ENDIF
C
IF (NIREPR .EQ. JPREGULAR) THEN
C
C Direction increments for regular grids
C
IF (KSEC2 (JPSEC2_DLONG) .EQ. IMISS) THEN
ITEMP = (KIAREA (JPEAST) - KIAREA (JPWEST) ) / NIWE + 1
ELSE
ITEMP = KSEC2 (JPSEC2_DLONG) * 10
ENDIF
C
IF (NIGRID (JPWESTEP) .NE. ITEMP) THEN
NIGRID (JPWESTEP) = ITEMP
OICHNG = .TRUE.
ENDIF
C
IF (KSEC2 (JPSEC2_DLAT) .EQ. IMISS) THEN
ITEMP = (KIAREA (JPNORTH) - KIAREA (JPSOUTH) ) / NINS + 1
ELSE
ITEMP = KSEC2 (JPSEC2_DLAT) * 10
ENDIF
C
IF (NIGRID (JPNSSTEP) .NE. ITEMP) THEN
NIGRID (JPNSSTEP) = ITEMP
OICHNG = .TRUE.
ENDIF
C
ELSE IF (NIREPR .EQ. JPGAUSSIAN) THEN
C
IF (NIGAUSS .NE. KSEC2 (JPSEC2_GTRUNC) ) THEN
NIGAUSS = KSEC2 (JPSEC2_GTRUNC)
OICHNG = .TRUE.
ENDIF
C
ELSE IF (NIREPR .EQ. JPQUASI) THEN
C
IF (NIGAUSS .NE. KSEC2 (JPSEC2_GTRUNC) ) THEN
NIGAUSS = KSEC2 (JPSEC2_GTRUNC)
NIWE = NIGAUSS * 4
OICHNG = .TRUE.
ENDIF
C
C Set line length definitions for Quasi regular field
C
DO 210 JSET = 1, NINS
IF (KLLEN (JSET) .NE. KSEC2 (JPSEC2_QUDEF + JSET) ) THEN
KLLEN (JSET) = KSEC2 (JPSEC2_QUDEF + JSET)
OICHNG = .TRUE.
ENDIF
210 CONTINUE
C
ENDIF
C
C _______________________________________________________
C
C* Section 3. Set Grib Section 1 variables and flags
C _______________________________________________________
C
300 CONTINUE
C
IF (KPR.GE.1) CALL INTLOG(JP_DEBUG,'IAIDEF: Section 3.',JPQUIET)
C
NITABLE = KSEC1 (JPSEC1_TABLE)
NIPARAM = KSEC1 (JPSEC1_PARAM)
C
C Setup ECMWF local definition number and stream if applicable
C
IF( KSEC1(24).EQ.1 ) THEN
NILOCAL = KSEC1(37)
NISTREM = KSEC1(40)
ELSE
NILOCAL = 0
NISTREM = 0
ENDIF
C
LPREC = PRECIP()
C
IF (NITABLE .EQ. 1) THEN
C
C WMO International table for meteorological parameters
C
LWIND = NIPARAM .EQ. JP_WMO_U .OR. NIPARAM .EQ. JP_WMO_V
C
LSMPAR = NIPARAM .EQ. JP_WMO_LSM
C
GNLSM = .NOT. (NIPARAM .EQ. JP_WMO_MSL .OR. LSMPAR)
C
IF (GNLSM .NEQV. LSM) THEN
LSMCHNG = .TRUE.
LSM = GNLSM
ENDIF
C
ELSE IF (NITABLE .EQ. 128) THEN
C
C ECMWF local code table 2 for meteorological parameters
C
LWIND = NIPARAM .EQ. JP_U .OR. NIPARAM .EQ. JP_V .OR.
X NIPARAM .EQ. JP_10U .OR. NIPARAM .EQ. JP_10V
C
LSMPAR = NIPARAM .EQ. JP_LSM
C
GNLSM = .NOT. (NIPARAM .EQ. JP_MSL .OR. LSMPAR)
C
IF (GNLSM .NEQV. LSM) THEN
LSMCHNG = .TRUE.
LSM = GNLSM
ENDIF
C
ELSE IF (NITABLE .EQ. 129) THEN
C
C ECMWF local code table for gradients of parameters
C
LWIND = .FALSE.
LSMPAR = .FALSE.
C
IF (.NOT. LSM) THEN
LSMCHNG = .TRUE.
LSM = .TRUE.
ENDIF
C
ELSE IF (NITABLE .EQ. 130) THEN
C
C ECMWF local code table for ASTEX experiments
C
LWIND = .FALSE.
LSMPAR = .FALSE.
C
IF (.NOT. LSM) THEN
LSMCHNG = .TRUE.
LSM = .TRUE.
ENDIF
C
ELSE IF (NITABLE .EQ. 131) THEN
C
C ECMWF local code table for probability forecasts
C
LWIND = .FALSE.
LSMPAR = .FALSE.
C
IF (.NOT. LSM) THEN
LSMCHNG = .TRUE.
LSM = .TRUE.
ENDIF
C
ELSE IF (NITABLE .EQ. 140) THEN
C
C ECMWF local code table for wave models
C
LWIND = .FALSE.
LSMPAR = .FALSE.
C
IF (.NOT. LSM) THEN
LSMCHNG = .TRUE.
LSM = .TRUE.
ENDIF
C
ELSE IF (NITABLE .EQ. 150) THEN
C
C ECMWF local code table ocean data
C
LWIND = .FALSE.
LSMPAR = .FALSE.
C
IF (.NOT. LSM) THEN
LSMCHNG = .TRUE.
LSM = .TRUE.
ENDIF
C
ELSE
C
C Unexpected code table found
C
LWIND = .FALSE.
LSMPAR = .FALSE.
C
IF (.NOT. LSM) THEN
LSMCHNG = .TRUE.
LSM = .TRUE.
ENDIF
C
ENDIF
C
IF (KPR .GE. 1) THEN
CALL INTLOG(JP_DEBUG,
X 'IAIDEF: Input field definition parameters.',JPQUIET)
CALL INTLOG(JP_DEBUG,'IAIDEF: Parameter value = ',NIPARAM)
CALL INTLOG(JP_DEBUG,'IAIDEF: Representation = ',NIREPR)
IF (NIWE .NE. 0) CALL INTLOG(JP_DEBUG,
X 'IAIDEF: Number W-E = ',NIWE)
IF (NINS .NE. 0) CALL INTLOG(JP_DEBUG,
X 'IAIDEF: Number N-S = ',NINS)
IF (NIREPR .EQ. JPGAUSSIAN .OR. NIREPR .EQ. JPQUASI)
X CALL INTLOG(JP_DEBUG,'IAIDEF: Gaussian truncation = ',NIGAUSS)
IF (NIREPR .EQ. JPREGULAR .AND. NIGRID (1) .NE. 0) THEN
CALL INTLOG(JP_DEBUG,'IAIDEF: Grid WE = ',NIGRID (1))
CALL INTLOG(JP_DEBUG,'IAIDEF: Grid NS = ',NIGRID (2))
ENDIF
IF (KIAREA (1) .NE. 0) THEN
CALL INTLOG(JP_DEBUG,'IAIDEF: Area North = ',KIAREA(1))
CALL INTLOG(JP_DEBUG,'IAIDEF: Area West = ',KIAREA(2))
CALL INTLOG(JP_DEBUG,'IAIDEF: Area South = ',KIAREA(3))
CALL INTLOG(JP_DEBUG,'IAIDEF: Area East = ',KIAREA(4))
ENDIF
C
CALL INTLOG(JP_DEBUG,'IAIDEF: Control flag status:',JPQUIET)
C
IF( OICHNG ) THEN
CALL INTLOG(JP_DEBUG,'IAIDEF:Input fld change TRUE',JPQUIET)
ELSE
CALL INTLOG(JP_DEBUG,'IAIDEF:Input fld change FALSE',JPQUIET)
ENDIF
C
IF( LSMCHNG ) THEN
CALL INTLOG(JP_DEBUG,'IAIDEF: LSM change TRUE',JPQUIET)
ELSE
CALL INTLOG(JP_DEBUG,'IAIDEF: LSM change FALSE',JPQUIET)
ENDIF
C
IF( LSM ) THEN
CALL INTLOG(JP_DEBUG,'IAIDEF: LSM flag TRUE',JPQUIET)
ELSE
CALL INTLOG(JP_DEBUG,'IAIDEF: LSM flag FALSE',JPQUIET)
ENDIF
C
IF( LWIND ) THEN
CALL INTLOG(JP_DEBUG,'IAIDEF: Wind flag TRUE',JPQUIET)
ELSE
CALL INTLOG(JP_DEBUG,'IAIDEF: Wind flag FALSE',JPQUIET)
ENDIF
C
IF( LPREC ) THEN
CALL INTLOG(JP_DEBUG,'IAIDEF: Precipitn flag TRUE',JPQUIET)
ELSE
CALL INTLOG(JP_DEBUG,'IAIDEF: Precipitn flag FALSE',JPQUIET)
ENDIF
C
IF( LSMPAR ) THEN
CALL INTLOG(JP_DEBUG,'IAIDEF: LSM param flag TRUE',JPQUIET)
ELSE
CALL INTLOG(JP_DEBUG,'IAIDEF: LSM param flag FALSE',JPQUIET)
ENDIF
ENDIF
C
C _______________________________________________________
C
C* Section 9. Return to calling routine. Format statements
C _______________________________________________________
C
900 CONTINUE
C
IF (KPR.GE.1) CALL INTLOG(JP_DEBUG,'IAIDEF: Section 9.',JPQUIET)
C
RETURN
END
|
