C $Header: /home/ubuntu/mnt/e9_copy/MITgcm/pkg/thsice/thsice_map_exf.F,v 1.2 2007/04/16 23:37:48 jmc Exp $
C $Name:  $

#include "THSICE_OPTIONS.h"
#ifdef ALLOW_EXF
#include "EXF_OPTIONS.h"
#endif

CBOP
C     !ROUTINE: THSICE_MAP_EXF
C     !INTERFACE:
      SUBROUTINE THSICE_MAP_EXF(
     I                  iceMsk,
     O                  totPrc, snowPrc, flxSW,
     I                  iMin,iMax,jMin,jMax, bi,bj, myThid )
C     !DESCRIPTION: \bv
C     *==========================================================*
C     | S/R  THSICE_MAP_EXF
C     | Interface S/R : map Precip, Snow and shortwave fluxes 
C     |                 from pkg EXF to thsice variables
C     *==========================================================*
C     \ev

C     !USES:
      IMPLICIT NONE

C     == Global data ==
#include "SIZE.h"
#include "EEPARAMS.h"
#include "PARAMS.h"
#include "FFIELDS.h"
#ifdef ALLOW_EXF
# include "EXF_CONSTANTS.h"
# include "EXF_PARAM.h"
# include "EXF_FIELDS.h"
#endif

C     !INPUT/OUTPUT PARAMETERS:
C     === Routine arguments ===
C     iceMsk    :: sea-ice fraction: no ice=0, grid all ice 1  []
C     totPrc    :: Total Precipitation (including run-off) [kg/m2/s]
C     snowPrc   :: Snow Precipitation [kg/m2/s]
C     flxSW     :: Net short-wave surface flux (+=down) [W/m2]
C     iMin,iMax :: range of indices of computation domain
C     jMin,jMax :: range of indices of computation domain
C     bi,bj     :: current tile indices
C     myThid      :: Thread no. that called this routine.
      _RL iceMsk (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
      _RL totPrc (1-OLx:sNx+OLx,1-OLy:sNy+OLy)
      _RL snowPrc(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
      _RL flxSW  (1-OLx:sNx+OLx,1-OLy:sNy+OLy)
      INTEGER iMin,iMax
      INTEGER jMin,jMax
      INTEGER bi,bj
      INTEGER myThid
CEOP

#ifdef ALLOW_THSICE
#ifdef ALLOW_EXF

C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----|
C     === Local variables ===
C     i,j   :: current grid point indices
      INTEGER i,j

      DO j = jMin, jMax
       DO i = iMin, iMax
        totPrc(i,j) = precip(i,j,bi,bj)*rhoConstFresh
#if defined (ALLOW_RUNOFF) || defined (ALLOW_SEAICE)
        totPrc(i,j) = totPrc(i,j) + runoff(i,j,bi,bj)*rhoConstFresh
#endif
CML           flxSW (i,j) = -Qsw(i,j,bi,bj)
        flxSW (i,j) = swdown(i,j,bi,bj) 
       ENDDO
      ENDDO
       
      IF ( snowPrecipFile .NE. ' ' ) THEN
       DO j = jMin, jMax
        DO i = iMin, iMax
         snowPrc(i,j) = snowPrecip(i,j,bi,bj)*rhoConstFresh
        ENDDO
       ENDDO
      ELSE
C     If specific snow precipitiation is now available, use 
C     precipitation when ever the air temperature is below 0 degC
       DO j = jMin, jMax
        DO i = iMin, iMax
         IF ( iceMsk(i,j,bi,bj).GT.0. _d 0
     &        .AND. atemp(i,j,bi,bj).LE.cen2kel )  THEN
CML     &        .AND. atemp(i,j,bi,bj).LE.Tf0kel )  THEN
          snowPrc(i,j) = precip(i,j,bi,bj)*rhoConstFresh
         ENDIF
        ENDDO
       ENDDO
      ENDIF

C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----|

#endif /* ALLOW_EXF */
#endif /* ALLOW_THSICE */

      RETURN
      END