Re: "micron" to kg/m^2 conversion
- From: Greg Campbell <ggeonerdd@xxxxxxxxxxx>
- Date: Wed, 29 Mar 2006 22:33:12 -0700
balt3@xxxxxxxxxxxxxxx wrote:
Hi all,
I've recently interacted with Astronomers regarding precipitable water
vapour content in the atmosphere. They seem to measure the PWV in
microns, while meteo people appear to be using kg/m^2. Does anybody
know how to convert between the two? A cursory google search yielded
absolutely nothing.
Thanks!
- Balt
Like you, I've never heard of anyone measuring the actual H20 conent in microns.
Maybe your thinking of the infrared emissions _from_ the water, where microns count the wavelength of light being imaged/measured/etc., not the quantity of H20. (?)
http://cimss.ssec.wisc.edu/goes/misc/wv/wv_intro.html
Alternately, there are 'windows' of observable IR radiation that can reach the surface throught the water vapor. Higher H20 levels would will inhibit observing at the wavelengths that are partially attenuated.
http://www.iac.es/project/CCam/Atmosphere4.gif
(See http://www.iac.es/project/CCam/Atmosphere.htm )
-Greg
.
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