qsatfjh2 Subroutine

public subroutine qsatfjh2(var, CRMH2O, CRMAIR, CTETENA, CTETENB, CTETENC, tair, pmb)

Purpose

This SUBROUTINE evaluates the specific humidity (water vapour mixing ratio) at saturation (in kgkg$^{-1}$), at a given air temperature (in $^{\circ}$C) and air pressure (in hPa).

Method

The Teten's formula for specific humidity at saturation is used, based on the values for the mass of a mole of water,CRMH2o, mass of a mole of dry air Crmair, and the Teten constants.

Reference

Murray F. W., 1967

Arguments

Type	Intent	Optional	Attributes		Name
real,	intent(out)			::	var	specific humidity at saturation (kgkg$^{-1}$)
real,	intent(in)			::	CRMH2O
real,	intent(in)			::	CRMAIR
real,	intent(in)			::	CTETENA
real,	intent(in)			::	CTETENB
real,	intent(in)			::	CTETENC
real,	intent(in)			::	tair	air temperature ($^{\circ}$C),
real,	intent(in)			::	pmb	surface air pressure (hPa)