[wxqc] Barometric Pressure Errors

[Geoffrey Dick]

On Mon, 17 Jul 2006 10:03:06 -0400
"Thomas E. Salzer" <tom.es at verizon.net> said 
regarding barometric pressure errors:

> .... The difference is how one makes corrections for altitude. 
> If one simply uses elevation, they will get a different result 
> than if dew point and temperature are included. ...

I would like to understand the simple physics of how dew point and 
temperature can affect barometric pressure at a fixed elevation.   
Can anyone explain it in layman terms?


Geoffrey Dick