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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
SUBROUTINE CHKPREC()
C
C---->
C**** CHKPREC
C
C Purpose
C -------
C
C Determines whether or not the current field is to be
C considered for 'precipitation' treatment.
C
C
C Interface
C ---------
C
C CALL CHKPREC()
C
C Input
C -----
C
C None
C
C
C Output
C ------
C
C Sets the precipitation threshold if give by environment variable
C PRECIPITATION_THRESHOLD. Otherwise gives it a default value.
C
C
C Method
C ------
C
C See below.
C
C
C Externals
C ---------
C
C INTLOG - Logs messages
C
C Uses common block nifld.common
C
C
C Author
C ------
C
C J.D.Chambers ECMWF December 2003
C
C----<
C
C
IMPLICIT NONE
C
#include "parim.h"
#include "nifld.common"
C
C Local variables
C
CHARACTER*20 PTHRESH
INTEGER IBLANK
LOGICAL LFIRST
DATA LFIRST/.TRUE./
SAVE LFIRST
C
C -----------------------------------------------------------------|
C* Section 1. Initialise
C -----------------------------------------------------------------|
C
100 CONTINUE
C
IF( LFIRST ) THEN
LFIRST = .FALSE.
CALL GETENV('PRECIPITATION_THRESHOLD',PTHRESH)
IBLANK = INDEX(PTHRESH, ' ')
IF( IBLANK.GT.1 ) THEN
READ(PTHRESH,'(F15.8)') ZPRECIP
ELSE
ZPRECIP = 0.00005
ENDIF
C
CALL INTLOGR(JP_DEBUG,
X 'CHKPREC: PRECIPITATION_THRESHOLD = ',ZPRECIP)
ENDIF
C
C -----------------------------------------------------------------|
C* Section 9. Return
C -----------------------------------------------------------------|
C
900 CONTINUE
RETURN
END
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