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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 IARCNTL(PIFELD, KILEN, POFELD, KOLEN, KILN,
1 OIWEGLOBE, OINPOLE, OISPOLE, KOLN, OOWEGLOBE, OONPOLE,
2 OOSPOLE, KPR, KERR)
C
C---->
C**** *IARCNTL*
C
C Purpose
C -------
C
C The global controlling routine for interpolating between a quasi
C regular Gaussian input field and a regular Gaussian or
C latitude/longitude output field.
C
C
C Interface
C ---------
C
C IERR = IARCNTL(PIFELD, KILEN, POFELD, KOLEN, KILN, OIWEGLOBE,
C 1 OINPOLE, OISPOLE, KOLN, OOWEGLOBE, OONPOLE, OOSPOLE, KPR,
C 2 KERR)
C
C
C Input parameters
C ----------------
C
C PIFELD - The input field provided by the calling routine.
C
C KILEN - The length of the input field.
C
C KOLEN - The length of the output field.
C
C KILN - The Northern line number of the input field within
C its Gaussian field.
C
C OIWEGLOBE - A flag indicating whether the input field is
C global West to East.
C
C OINPOLE - A flag indicating whether the North pole is
C included in the input field.
C
C OISPOLE - A flag indicating whether the South pole is
C include in the input field.
C
C KOLN - The Northern line number of the output field
C within its Gaussian field.
C
C OOWEGLOBE - A flag indicating whether the output field is
C global West to East.
C
C OONPOLE - A flag indicating whether the North pole is
C include in the output field.
C
C OOSPOLE - A flag indicating whether the South pole is
C include in the output field.
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
C Output parameters
C -----------------
C
C POFELD - The output field returned to the calling routine.
C
C
C Return value
C ------------
C
C The error indicator (INTEGER).
C
C
C Error and Warning Return Values
C -------------------------------
C
C 21901 The input data representation was not valid when the
C grid was generated. This should not happen as the data
C representation has been previously validated.
C 21902 The output data representation was not valid when the
C grid was generated. This should not happen as the data
C representation has been previously validated.
C 21903 Attempt to produce global West-East field where the input
C field was not global.
C 21904 Attempt to produce global North-South field where the
C input field was not global.
C
C
C Common block usage
C ------------------
C
C grspace.h - The include file contains all the array space
C for grid to grid interpolation.
C
C MILLEN - The array of quasi regular Gaussian field
C latitude line length definition.
C RIGAUSS - Real array of input field Gaussian latitudes is
C used.
C ROGAUSS - Real array of output field Gaussian latitudes is
C used.
C
C MILATG - The input field latitudes.
C MILONG - The input field longitudes.
C MISTRT - The array offsets for the start of each latitude
C line for a quasi regular Gaussian input field.
C MNSDIST - The distances to neighbouring latitude lines of
C the input field from the associated line of
C latitude in the output field.
C MNSIND - The latitude line numbers (array offset) of the
C input field associated with each line of
C latitude in the output field.
C MOLATG - The output field latitudes.
C MOLONG - The output field longitudes.
C MWEDIST - This array holds the distances to neighbouring
C longitude points of the input field from the
C associated longitude points in the output field.
C MWEIND - This array holds the longitude points (array
C offset) from the input field associated with
C each longitude point in the output field.
C RINPNT - Array used to aid vectorisation in processing
C precipitation fields.
C RMAX - Array used to aid vectorisation in normalising
C interpolation weights and processing
C precipitation fields.
C WFACT - The array of interpolation weights for each
C point in the output field.
C
C nifld.common - This file contains all the input field
C definition variables.
C
C LCHANGE - Process change flag is used and set.
C LSMCHNG - LSM change flag is used and set.
C LSM - LSM usage flag is used.
C LSMPAR - LSM parameter flag is used.
C LPREC - Precipitation flag is used.
C LWIND - Wind flag is used.
C
C NIAREA - Input field area definition (N/W/S/E) is used.
C NIGAUSS - Input field Gaussian truncation is used.
C NIGRID - Input field grid definition (WE/NS) is used.
C NINS - Number of grid points in NS direction for input
C field is used.
C NIREPR - Input field representation is used.
C NIWE - Number of grid points in WE direction for input
C field is used.
C
C nofld.common - This file contains all the output field
C definition variables.
C
C NOAREA - Output field area definition (N/W/S/E) is used.
C NOGAUSS - Output field Gaussian truncation is used.
C NOGRID - Output field grid definition (WE/NS) is used.
C NONS - Number of grid points in NS direction for output
C field is used.
C NOREPR - Output field representation is used.
C NOWE - Number of grid points in WE direction for output
C field is used.
C
C
C Externals
C ---------
C
C ABORTX - Standard routine to kill task.
C IGDINS - Calculate the distances between points in an
C output latitude array and its North and South
C neighbours in the input latitude array.
C IGGRID - Generate the arrays of latitude and longitude
C points for a Gaussian truncation and area.
C IGLGRID - Generate the arrays of latitude and longitude
C points for a regular latitude longitude grid.
C IGLSIZE - Evaluate the array sizes for a regular
C latitude/longitude field.
C IGLSMD - Generate the land sea mask file information.
C IGNORM - Normalise the array of interpolation weights.
C IGPLSM - Force an interpolated land sea mask field back to
C a real 0-1 field.
C IGPOLEG - Calculate the values at the pole of a regular
C latitude/longitude field when the input is a
C Gaussian field.
C IGPOLEW - Calculates the values at the pole of a regular
C latitude/longitude wind field when the input is a
C Gaussian field.
C IGSIZE - Evaluate the array sizes for a Gaussian field.
C IRDIWE - Calculate the distances between points in an
C output longitude array and its West and East
C neighbours in the input longitude array for a
C quasi regular input field and regular output field.
C IRGMEM - This routine acquires heap space for quasi regular
C to regular interpolation.
C IRGRID - Generate the arrays of latitude points and the
C starting points of the lines of latitude for a
C quasi regular Gaussian grid.
C IRGTOG - Perform basic interpolation between the input and
C output fields for a quasi regular input field and
C a regular output field.
C IRINT - Calculate the basic unnormalised interpolation
C weights when interpolating from a quasi regular
C grid to a regular grid.
C IRLSMB - Calculate the effects of the land-sea masks on the
C unnormalised interpolation weights for a quasi
C regular input field and regular output field.
C IRPREC - Perform additional interpolation processes for
C precipitation fields when the input field is Quasi
C regular.
C ZPREC - Perform additional interpolation processes
C for precipitation
C IRSIZE - Evaluate the array sizes for a quasi regular
C Gaussian field.
C INTLOG - Logs messages.
C
C
C Method
C ------
C This is purely a controlling routine with all the work being
C performed in the external routines.
C
C
C Reference
C ---------
C None
C
C
C Comments
C --------
C None
C
C
C Author
C ------
C K. Fielding *ECMWF* Nov 1993
C
C
C Modifications
C -------------
C J.Chambers ECMWF Oct 1998
C Allow field type for rotated grids.
C
C S.Curic ECMWF Oct 2005
C Add zprec routine that Perform checking
C of precipitation
C
C----<
C -----------------------------------------------------------------|
C* Section 0. Definition of variables.
C -----------------------------------------------------------------|
C
IMPLICIT NONE
C
#include "parim.h"
#include "nifld.common"
#include "nofld.common"
#include "grspace.h"
C
C Parameters
C
INTEGER JPROUTINE
PARAMETER (JPROUTINE = 21900)
C
C Function arguments
C
LOGICAL OIWEGLOBE, OINPOLE, OISPOLE, OOWEGLOBE, OONPOLE, OOSPOLE
INTEGER KILEN, KOLEN, KILN, KOLN, KPR, KERR
REAL PIFELD(KILEN), POFELD(KOLEN)
C
C Local variables
C
LOGICAL LFAIL, LERROR, LDEBUG, LREGOUT
LOGICAL GINSPOLE, GIGLOBE, GISTAND, GONSPOLE, GOGLOBE, GOSTAND
LOGICAL GPREC,LSM_VALUES
CHARACTER*120 YIFILE, YOFILE
CHARACTER*12 YFLAG
INTEGER IIOFF, IINDEX, IOOFF
INTEGER IIREC, IOREC, IERR
C
C Working copies of area and grid arrays that may be changed
C
INTEGER IILGRID(2), IILLINE(2), IOLGRID(2), IOLLINE(2)
C
C External functions
C
INTEGER IGDINS, IGGRID, IGLGRID, IGLSMD, IGNORM, IGPLSM,
X IGPOLEG, IGPOLEW,
X IRDIWE, IRGMEM, IRGRID, IRGTOG, IRINT, IRLSMB, IRPREC,
X ZPREC
C
C -----------------------------------------------------------------|
C* Section 1. Initialisation
C -----------------------------------------------------------------|
C
100 CONTINUE
C
IARCNTL = 0
IERR = 0
C
C Set all flag variables
C
LDEBUG = (KPR.GE.1)
LFAIL = (KERR.EQ.0)
LERROR = (KERR.GE.0)
LREGOUT = (NOREPR.EQ.JPREGULAR).OR.(NOREPR.EQ.JPREGROT)
C
IF( LDEBUG ) THEN
CALL INTLOG(JP_DEBUG,'IARCNTL: Section 1.',JPQUIET)
CALL INTLOG(JP_DEBUG,
X 'IARCNTL: Input field definition parameters.',JPQUIET)
CALL INTLOG(JP_DEBUG,'IARCNTL: Representation = ',NIREPR)
IF( NINS.NE.0 ) CALL INTLOG(JP_DEBUG,
X 'IARCNTL: Number N-S = ',NINS)
CALL INTLOG(JP_DEBUG,'IARCNTL: Gaussian truncation= ',NIGAUSS)
IF( NIAREA(1).NE.0 ) THEN
CALL INTLOG(JP_DEBUG,'IARCNTL: Area North = ',NIAREA(1))
CALL INTLOG(JP_DEBUG,'IARCNTL: Area West = ',NIAREA(2))
CALL INTLOG(JP_DEBUG,'IARCNTL: Area South = ',NIAREA(3))
CALL INTLOG(JP_DEBUG,'IARCNTL: Area East = ',NIAREA(4))
ENDIF
C
CALL INTLOG(JP_DEBUG,
X 'IARCNTL: Output field definition parameters.',JPQUIET)
CALL INTLOG(JP_DEBUG,'IARCNTL: Representation = ',NOREPR)
IF( NOWE.NE.0 ) CALL INTLOG(JP_DEBUG,
X 'IARCNTL: Number W-E = ',NOWE)
IF( NONS.NE.0 ) CALL INTLOG(JP_DEBUG,
X 'IARCNTL: Number N-S = ',NONS)
IF( (NOREPR.EQ.JPGAUSSIAN).OR.(NOREPR.EQ.JPQUASI) )
X CALL INTLOG(JP_DEBUG,'IARCNTL: Gaussian truncation= ',NOGAUSS)
IF( LREGOUT.AND.NOGRID(1).NE.0 ) THEN
CALL INTLOG(JP_DEBUG,'IARCNTL: Grid WE = ',NOGRID(1))
CALL INTLOG(JP_DEBUG,'IARCNTL: Grid NS = ',NOGRID(2))
ENDIF
IF( NOAREA(1).NE.0 ) THEN
CALL INTLOG(JP_DEBUG,'IARCNTL: Area North = ',NOAREA(1))
CALL INTLOG(JP_DEBUG,'IARCNTL: Area West = ',NOAREA(2))
CALL INTLOG(JP_DEBUG,'IARCNTL: Area South = ',NOAREA(3))
CALL INTLOG(JP_DEBUG,'IARCNTL: Area East = ',NOAREA(4))
ENDIF
C
CALL INTLOG(JP_DEBUG,'IARCNTL: Control flag status:',JPQUIET)
C
IF( LSMCHNG ) THEN
CALL INTLOG(JP_DEBUG,'IARCNTL: LSM change TRUE',JPQUIET)
ELSE
CALL INTLOG(JP_DEBUG,'IARCNTL: LSM change FALSE',JPQUIET)
ENDIF
C
IF( LSM ) THEN
CALL INTLOG(JP_DEBUG,'IARCNTL: LSM flag TRUE',JPQUIET)
ELSE
CALL INTLOG(JP_DEBUG,'IARCNTL: LSM flag FALSE',JPQUIET)
ENDIF
C
IF( LWIND ) THEN
CALL INTLOG(JP_DEBUG,'IARCNTL: Wind flag TRUE',JPQUIET)
ELSE
CALL INTLOG(JP_DEBUG,'IARCNTL: Wind flag FALSE',JPQUIET)
ENDIF
C
IF( LPREC ) THEN
CALL INTLOG(JP_DEBUG,'IARCNTL: Precipitn flag TRUE',JPQUIET)
ELSE
CALL INTLOG(JP_DEBUG,'IARCNTL: Precipitn flag FALSE',JPQUIET)
ENDIF
C
IF( LSMPAR ) THEN
CALL INTLOG(JP_DEBUG,'IARCNTL: LSM param flag TRUE',JPQUIET)
ELSE
CALL INTLOG(JP_DEBUG,'IARCNTL: LSM param flag FALSE',JPQUIET)
ENDIF
ENDIF
C
C The change of parameter option spans sections 2 to 3
C
IF( LCHANGE ) THEN
C
C -----------------------------------------------------------------|
C* Section 2. Get space and define grids.
C -----------------------------------------------------------------|
C
200 CONTINUE
C
IF( LDEBUG ) CALL INTLOG(JP_DEBUG,'IARCNTL: Section 2.',JPQUIET)
C
C Get the required memory
C
IARCNTL = IRGMEM(KPR, KERR)
IF( IARCNTL.GT.0 ) GOTO 900
C
C Input field definition
C
IF( NIREPR.EQ.JPQUASI ) THEN
C
IARCNTL = IRGRID(NIAREA, MILLEN, KILN, RIGAUSS, MISTRT,
X MILATG, NINS, OIWEGLOBE, KPR, KERR)
IF( IARCNTL.GT.0 ) GOTO 900
C
C Is the input field global
C
GINSPOLE = OINPOLE.AND.OISPOLE
GIGLOBE = OIWEGLOBE.AND.GINSPOLE
C
ELSE
C
IARCNTL = JPROUTINE + 1
IF( LERROR ) THEN
CALL INTLOG(JP_ERROR,
X 'IARCNTL: Illegal input data representation = ',NIREPR)
IF( LFAIL ) CALL INTLOG(JP_FATAL,
X 'IARCNTL: Interpolation failing.',JPQUIET)
ENDIF
GOTO 900
C
ENDIF
C
C Output grid definition
C
C Is the output field global North South
C
GONSPOLE = OONPOLE.AND.OOSPOLE
GOGLOBE = OOWEGLOBE.AND.GONSPOLE
C
IF( NOREPR.EQ.JPGAUSSIAN ) THEN
C
IARCNTL = IGGRID(NOGAUSS, NOAREA, KOLN, ROGAUSS,
X MOLONG,NOWE,MOLATG,NONS,OOWEGLOBE,KPR,KERR)
IF( IARCNTL.GT.0 ) GOTO 900
C
ELSEIF ( LREGOUT ) THEN
C
IARCNTL = IGLGRID(NOGRID, NOAREA, MOLONG, NOWE, MOLATG,
X NONS, OOWEGLOBE, KPR, KERR)
IF( IARCNTL.GT.0 ) GOTO 900
C
ELSE
C
IARCNTL = JPROUTINE + 2
IF( LERROR ) THEN
CALL INTLOG(JP_ERROR,
X 'IARCNTL: Illegal output data representation = ',NIREPR)
IF( LFAIL ) CALL INTLOG(JP_FATAL,
X 'IARCNTL: Interpolation failing.',JPQUIET)
ENDIF
GOTO 900
C
ENDIF
C
C -----------------------------------------------------------------|
C* Section 3. Create output to input grid mapping and distance arrays
C -----------------------------------------------------------------|
C
300 CONTINUE
C
IF( LDEBUG )
X CALL INTLOG(JP_DEBUG,'IARCNTL: Section 3.',JPQUIET)
C
C First check that the input and output fields are compatible.
C
IF( .NOT.GIGLOBE ) THEN
C
IF( .NOT.OIWEGLOBE ) THEN
C
C Cannot produce global output field if input field not global
C
IF( OOWEGLOBE ) THEN
IARCNTL = JPROUTINE + 3
IF( LERROR ) THEN
CALL INTLOG(JP_ERROR,
X 'IARCNTL: Cannot produce global output from',JPQUIET)
CALL INTLOG(JP_ERROR,
X 'IARCNTL: non-global input. The W-E input',JPQUIET)
CALL INTLOG(JP_ERROR,
X 'IARCNTL: direction was not global.',JPQUIET)
IF( LFAIL ) CALL INTLOG(JP_FATAL,
X 'IARCNTL: Interpolation failing.',JPQUIET)
ENDIF
GOTO 900
ENDIF
C
ENDIF
C
IF( .NOT.GINSPOLE ) THEN
C
C Cannot produce global output field if input field not global
C
IF( GONSPOLE ) THEN
IARCNTL = JPROUTINE + 4
IF( LERROR ) THEN
CALL INTLOG(JP_ERROR,
X 'IARCNTL: Cannot produce global output from',JPQUIET)
CALL INTLOG(JP_ERROR,
X 'IARCNTL: non-global input. The N-S input',JPQUIET)
CALL INTLOG(JP_ERROR,
X 'IARCNTL: direction was not global.',JPQUIET)
IF( LFAIL ) CALL INTLOG(JP_FATAL,
X 'IARCNTL: Interpolation failing.',JPQUIET)
ENDIF
GOTO 900
ENDIF
C
ENDIF
C
ENDIF
C
IARCNTL = IGDINS(MILATG, NINS, MOLATG, NONS, OINPOLE,
X OISPOLE, MNSIND, MNSDIST, KPR, KERR)
IF( IARCNTL.GT.0 ) GOTO 900
C
IARCNTL = IRDIWE(MILLEN, NINS, MNSIND, NONS, MILONG, NIWE,
X MOLONG, NOWE, MWEIND, MWEDIST, KPR, KERR)
IF( IARCNTL.GT.0 ) GOTO 900
C
C The end of primary initialisation
C
ENDIF
C
C -----------------------------------------------------------------|
C* Section 4. Create normalised weight arrays
C -----------------------------------------------------------------|
C
400 CONTINUE
C
IF( LDEBUG ) CALL INTLOG(JP_DEBUG,'IARCNTL: Section 4.',JPQUIET)
C
C The following code is affected by the Land Sea mask flag
C
IF( LCHANGE.OR.LSMCHNG ) THEN
C
IARCNTL = IRINT(MWEDIST, NOWE, MNSDIST, NONS, WFACT, KPR, KERR)
IF( IARCNTL.GT.0 ) GOTO 900
C
IF( LSM ) THEN
C
IARCNTL = IGLSMD(NIDATE,NIREPR,NIGRID,NIGAUSS,NIAREA,KILN,
X YIFILE,GISTAND,IILGRID,IILLINE,IIREC,KPR,KERR)
IF( IARCNTL.GT.0 ) GOTO 900
C
IARCNTL = IGLSMD(NODATE,NOREPR,NOGRID,NOGAUSS,NOAREA,KOLN,
X YOFILE,GOSTAND,IOLGRID,IOLLINE,IOREC,KPR,KERR)
IF( IARCNTL.GT.0 ) GOTO 900
C
IARCNTL = IRLSMB(GISTAND, YIFILE, IIREC, IILGRID, IILLINE,
X GOSTAND,YOFILE,IOREC,IOLGRID,IOLLINE,KPR,KERR)
IF( IARCNTL.GT.0 ) GOTO 900
C
ENDIF
C
C Normalise the weights
C
IARCNTL = IGNORM(WFACT, RMAX, NOWE, NONS, KPR, KERR)
IF( IARCNTL.GT.0 ) GOTO 900
C
C This marks the end of a change to the specfication
C Clear the Change flags LCHANGE and LSMCHNG
C
LCHANGE = .FALSE.
LSMCHNG = .FALSE.
C
ENDIF
C
C -----------------------------------------------------------------|
C* Section 5. Interpolate from input to output field
C -----------------------------------------------------------------|
C
500 CONTINUE
C
IF( LDEBUG ) CALL INTLOG(JP_DEBUG,'IARCNTL: Section 5.',JPQUIET)
C
C Perform basic interpolation
C
IARCNTL = IRGTOG(PIFELD, MISTRT, NINS, NOWE, NONS, MWEIND,
X MNSIND, WFACT, POFELD, KPR, KERR)
IF( IARCNTL.GT.0 ) GOTO 900
C
C -----------------------------------------------------------------|
C* Section 6. Additional interpolations from input to output field
C -----------------------------------------------------------------|
C
600 CONTINUE
C
IF( LDEBUG ) CALL INTLOG(JP_DEBUG,'IARCNTL: Section 6.',JPQUIET)
C
C Precipitation field
C
C Force processing without neighbour check
GPREC = .FALSE.
CALL GETENV('PRECIPITATION_NEIGHBOUR_CHECK', YFLAG)
IF( YFLAG(1:1).EQ.'0' ) GPREC = .TRUE.
IF( LPREC ) THEN
C
IF( GPREC ) THEN
IARCNTL = ZPREC(POFELD, NOWE, NONS, KPR, KERR)
ELSE
IARCNTL = IRPREC(PIFELD, MISTRT, NINS, POFELD, NOWE, NONS,
X MWEIND, MNSIND, WFACT, RMAX, RINPNT, KPR, KERR)
ENDIF
IF( IARCNTL.GT.0 ) GOTO 900
C
ENDIF
C
C Special code for poles if Gaussian input and regular output
C
C North pole
C
IF( (NIREPR.EQ.JPQUASI).AND.
X LREGOUT .AND.
X OINPOLE .AND.
X OONPOLE ) THEN
C
IIOFF = MISTRT(1)
IOOFF = 1
IINDEX = (JP_I_N - 1) * NOWE + 1
C
IF( LWIND ) THEN
IARCNTL = IGPOLEW(PIFELD(IIOFF), MILLEN(1),
X POFELD(IOOFF), NOWE, MWEIND(1,IINDEX),
X MWEDIST(1,IINDEX), KPR, KERR)
ELSE
IARCNTL = IGPOLEG(PIFELD(IIOFF), MILLEN(1),
X POFELD(IOOFF), NOWE, KPR, KERR)
ENDIF
IF( IARCNTL.GT.0 ) GOTO 900
C
ENDIF
C
C South pole
C
IF( (NIREPR.EQ.JPQUASI).AND.
X LREGOUT .AND.
X OISPOLE .AND.
X OOSPOLE ) THEN
C
IIOFF = MISTRT(NINS)
IOOFF = (NONS - 1) * NOWE + 1
IINDEX = ( (NONS - 1) * 2 + JP_I_S - 1) * NOWE + 1
C
IF( LWIND ) THEN
IARCNTL = IGPOLEW(PIFELD(IIOFF), MILLEN(NINS),
X POFELD(IOOFF), NOWE, MWEIND(1,IINDEX),
X MWEDIST(1,IINDEX), KPR, KERR)
ELSE
IARCNTL = IGPOLEG(PIFELD(IIOFF), MILLEN(NINS),
X POFELD(IOOFF), NOWE, KPR, KERR)
ENDIF
C
IF( IARCNTL.GT.0 ) GOTO 900
C
ENDIF
C
C LSM field - must be 0 or 1
C
C Force processing real LSM
LSM_VALUES = .FALSE.
CALL GETENV('LSM_VALUES', YFLAG)
IF( YFLAG(1:1).EQ.'1' ) LSM_VALUES = .TRUE.
IF( .NOT.LSM_VALUES.AND.LSMPAR ) THEN
IARCNTL = IGPLSM(POFELD, NOWE * NONS, KPR, KERR)
IF( IARCNTL.GT.0 ) GOTO 900
ENDIF
C
C -----------------------------------------------------------------|
C* Section 9. Return to calling routine. Format statements
C -----------------------------------------------------------------|
C
900 CONTINUE
C
IF( LDEBUG ) CALL INTLOG(JP_DEBUG,'IARCNTL: Section 9.',JPQUIET)
C
RETURN
END
|
