Re: OT: Post Turtle

On Thu, 19 Jun 2008 07:58:42 -0700, John Larkin
<jjlarkin@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

I presume the point here is that manmade CO2 emissions increase the
pressure of the atmosphere, so increase the IR absorption of water...
another of the presumed positive feedback mechanisms. If so, what are
the numbers? If not, well, what is the point?

The greenhouse forcing caused by the addition of atmospheric CO2 is,
in a nutshell, that it replaces higher temperature Planck radiation at
lower altitudes with lower temperature Planck radiation at higher
altitudes. There is much more, of course. But that is the upshot.

If pressure broadening increases global warming, the atmospheric
pressure must be increasing. Is it? What we really need here is a good
physical chemist to work out the numbers.

Geez. I wonder if scientists might actually measure things and
develop, perhaps, high-resolution transmission molecular absorption
databases? HITRAN? Or work at all on radiative transfer physics?
Think so, maybe?

http://www.realclimate.org/index.php/archives/2007/06/a-saturated-gassy-argument
http://www.realclimate.org/index.php/archives/2007/06/a-saturated-gassy-argument-part-ii
http://www.aip.org/history/climate/co2.htm
http://www.aip.org/history/climate/Radmath.htm
http://geosci.uchicago.edu/~rtp1/ClimateBook/ClimateVol1.pdf
http://geosci.uchicago.edu/~rtp1/ClimateBook/ClimateWorkbook.pdf
http://cfa-www.harvard.edu/hitran/

Jon
.

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