Commit c5209c2f authored by Pierre Cazenave's avatar Pierre Cazenave

Merge branch 'master' into pica

parents d48b49b3 5b304a3c
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function rh = qair2rh(qair, temp, varargin)
% Convert specific humitidy to relative humidity.
%
% INPUTS:
% qair - Specific humidity. Dimensionless ratio of water mass /
% total air mass.
% temp - Temperature. Celsius.
% press - Pressure, optional. Millibar. Assume as 1013.25 if
% missing.
%
% OUTPUT:
% rh - relative humidity, ratio of actual water mixing ratio to
% saturation mixing ratio.
%
% NOTES:
% Translated from the R code here:
% http://earthscience.stackexchange.com/questions/2360
%
% Author(s):
% Pierre Cazenave (Plymouth Marine Laboratory)
if nargin == 2
press = 1013.25;
end
es = 6.112 * exp((17.67 * temp) / (temp + 243.5));
e = qair * press / (0.378 * qair + 0.622);
rh = e / es;
rh(rh > 1) = 1;
rh(rh < 0) = 0;
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