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!Environment Canada - Atmospheric Science and Technology License/Disclaimer,
! version 3; Last Modified: May 7, 2008.
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***S/R MHUAES - PASSAGE DE HU A ES
*
#include "phy_macros_f.h"
SUBROUTINE MHUAES(ES,HU,TX,PX,LNPS,MODP,SWTT,SWPH, 8,5
$ NI,NK,N)
*
#include "impnone.cdk"
*
INTEGER NI, NK, N, MODP
REAL ES(NI,NK), HU(NI,NK), TX(NI,NK)
REAL PX(NK), LNPS(NI,*)
REAL TEMP1
LOGICAL SWTT, SWPR, SWPH
*
*Author
* N. Brunet (Jan91)
*
*Revision
* 001 B. Bilodeau (August 1991)- Adaptation to UNIX
* 002 B. Bilodeau (January 2001) - Automatic arrays
* 003 B. Bilodeau (September 2003) - IBM conversion
* - call to vslog from massvp4 library
*
*Object
* to calculate the dew point depression from specific
* humidity, temperature and pressure
*
*Arguments
*
* - Output -
* ES dew point depressions in degrees Celsius
*
* - Input -
* HU specific humidity in kg/kg
* 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
* If HU <= 0, the value of HU is not changed but the
* function MAX(HU,0.0000000001) will prevent the log
* of a negative number.
*
*
*IMPLICITES
#include "consphy.cdk"
*MODULES
EXTERNAL INCTPHY
*
**
*--------------------------------------------------------------------
************************************************************************
* AUTOMATIC ARRAYS
************************************************************************
*
AUTOMATIC ( PN , REAL , (N) )
AUTOMATIC ( TP , REAL , (N) )
AUTOMATIC ( CTE, REAL , (N) )
*
************************************************************************
*
REAL TD, PETIT
INTEGER K, I
*
#include "dintern.cdk"
#include "fintern.cdk"
*--------------------------------------------------------------------
#include "initcph.cdk"
*
*
PETIT = 0.0000000001
*
DO 10 K=1,NK
*
#include "modpr2.cdk"
*
IF(SWTT)THEN
DO 100 I=1,N
TP(I) = TX(I,K)
100 CONTINUE
ELSE
DO 110 I=1,N
TP(I) = FOTTV(TX(I,K), HU(I,K))
110 CONTINUE
END IF
*
DO I=1,N
TEMP1 = PN(I)
CTE(I) = (FOEFQ(MAX(PETIT,HU(I,K)), TEMP1))/610.78
END DO
*
CALL VSLOG(CTE,CTE,N)
*
DO I=1,N
TD = (35.86*CTE(I) - 17.269*TRPL)/(CTE(I) - 17.269)
*
IF(TD.LT.TRPL.AND.SWPH)
$ TD = (7.66*CTE(I) - 21.875*TRPL)/(CTE(I) - 21.875)
*
ES(I,K) = TP(I) - TD
*
END DO
*
10 CONTINUE
*
*
RETURN
CONTAINS
#include "fintern90.cdk"
END