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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 MFOQST - CALCULE HUMIDITE SPECIFIQUE SATURANTE.
*
#include "phy_macros_f.h"
SUBROUTINE MFOQST(QS,TT,PX,LNPS,MODP,NI,NK,N) 21
*
#include "impnone.cdk"
*
INTEGER NI, NK, N, MODP
REAL QS(NI,NK), TT(NI,NK)
REAL PX(*), LNPS(NI,*)
REAL TEMP1
*
*Author
* N. Brunet (Jan91)
*
*Revision
* 001 B. Bilodeau (August 1991)- Adaptation to UNIX
* 002 B. Bilodeau (January 2001) - Automatic arrays
* 003 L. Spacek (May 2003) - IBM conversion
* - calls to vexp routine (from massvp4 library)
*
*Object
* to calculate saturation specific humidity (water and ice
* phase considered according to temperature)
*
*Arguments
*
* - Output -
* QS saturation specific humidity in kg/kg
*
* - Input -
* TT 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)
* NI horizontal dimension
* NK vertical dimension
* N number of points to process
*
*
*IMPLICITES
#include "consphy.cdk"
*MODULES
EXTERNAL INCTPHY
*
**
*--------------------------------------------------------------------
INTEGER K, I
REAL*8 DEPS1,DEPS2,DTRPL,DTEMP
*
************************************************************************
* AUTOMATIC ARRAYS
************************************************************************
*
AUTOMATIC ( PN , REAL , (N ) )
AUTOMATIC ( XT , REAL*8 , (NI, NK) )
*
************************************************************************
*
c FOEW1(TTT) = DMIN1(DSIGN(17.269D0,
c W DBLE(TTT)-DBLE(TRPL)),DSIGN
c W (21.875D0,DBLE(TTT)-DBLE(TRPL)))*DABS(DBLE(TTT)-DBLE(TRPL))/
c W (DBLE(TTT)-35.86D0+DMAX1(0.D0,DSIGN
c W (28.2D0,DBLE(TRPL)-DBLE(TTT))))
*--------------------------------------------------------------------
#include "initcph.cdk"
*
*
DTRPL=DBLE(TRPL)
DEPS1=DBLE(EPS1)
DEPS2=DBLE(EPS2)
DO K=1,NK
DO I=1,NI
DTEMP=DBLE(TT(I,K))
XT(I,K)=(DMIN1(DSIGN(17.269D0,DTEMP-DTRPL),
W DSIGN(21.875D0,DTEMP-DTRPL)))*DABS(DTEMP-DTRPL)/
W (DTEMP-35.86D0+DMAX1(0.D0,DSIGN(28.2D0,DTRPL-DTEMP)))
ENDDO
ENDDO
*
CALL VEXP(XT,XT,NI*NK)
*
DO 10 K=1,NK
*
#include "modpr2.cdk"
*
DO 15 I=1,N
DTEMP = DBLE(PN(I))
QS(I,K) = DEPS1/(DMAX1(1.0D0,DTEMP/
* (610.78D0*XT(I,K)))-DEPS2)
15 CONTINUE
10 CONTINUE
*
*
RETURN
END