"Paul Hyett" wrote in message
...
On Sat, 6 Nov 2010 at 10:10:10, Bernard Burton
wrote in uk.sci.weather :

The passage of yesterday's classic strong ana-cold front, recorded on the
Wokingham AWS, can be seen at:

http://www.woksat.info/cs/ejsgr101105.gif

BTW, what is the 'humidity mixing ratio'?

The amount of water vapour (kg) per kilogram of dry air.
If q is the amount of water vapour then HMR = q/(m-q) where m is the mass of
air (including water vapour).

Another measure is specific humidity (SH) which is q/m.

If we let q = m *SH then
HMR= m*SH/(m-m*SH) or
HMR = SH/(1-SH)

Will
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