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!Environment Canada - Atmospheric Science and Technology License/Disclaimer, 
!                     version 3; Last Modified: May 7, 2008.
!This is free but copyrighted software; you can use/redistribute/modify it under the terms 
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***S/R MHRAES  -  PASSAGE DE HR A ES
*
#include "phy_macros_f.h"

      SUBROUTINE MHRAES(ES,HR,TX,PX,LNPS,MODP,SWTT,SWPH, 2,2
     $                  NI,NK,N)
*
#include "impnone.cdk"
*
      INTEGER NI, NK, N, MODP
      REAL ES(NI,NK), HR(NI,NK), TX(NI,NK)
      REAL PX(NK), LNPS(NI,*)
      LOGICAL SWTT, SWPR, SWPH
*
*Author
*          N. Brunet  (Jan91)
*
*Revision
* 001      B. Bilodeau  (August 1991)- Adaptation to UNIX
* 002      B. Bilodeau (January 2001) - Automatic arrays
*
*Object
*          to calculate dew point depressions from relative humidity,
*          temperature and pressure.
*
*Arguments
*
*          - Output -
* ES       dew point depression in degrees Celsius
*
*          - Input -
* HR       relative humidity in fraction
* TX       temperature or virtual temperature in Kelvins
* PX       see MODP
* LNPS     see MODP
* MODP     pressure mode (SI units only):
*          =0; pressure level in PX
*          =1; sigma level in PX and PS(surface pressure) in LNPS
*          =2; sigma level in PX and logarithm of sigma level in
*          LNPS
*          =3; all points of pressure in LNPS(NI,*) in Pascals
*          =4; sigma level in PX and logarithm of sigma level in
*          LNPS(in millibars unless using SI units)
*          =5; logarithm of pressure level in PX(in millibars unless
*          using SI units)
* SWTT     .TRUE. to pass TT for argument
*          .FALSE. to pass TV for argument
* SWPH     .TRUE. to consider water and ice phase
*          .FALSE. to consider water phase only
* NI       horizontal dimension
* NK       vertical dimension
* N        number of treated points
*
*Notes
*          The calculation is done by calls to 2 routines MHRAHU
*          and MHUAES.
*
*
*IMPLICITES
#include "consphy.cdk"
*MODULES
      EXTERNAL INCTPHY, MHRAHU, MHUAES
*
**
*--------------------------------------------------------------------
*
************************************************************************
*     AUTOMATIC ARRAYS
************************************************************************
*
      AUTOMATIC ( HU , REAL , (NI,NK) )
*
************************************************************************
*
*--------------------------------------------------------------------
#include "initcph.cdk"
*
*
      CALL MHRAHU(HU,HR,TX,PX,LNPS,MODP,SWTT,SWPH,NI,NK,N)
      CALL MHUAES(ES,HU,TX,PX,LNPS,MODP,SWTT,SWPH,NI,NK,N)
*
*
      RETURN
      END