this was what wirebender, and others disagree with when discussing 'backradiation'.
he called this rearrangement of terms
corrupt
some people really are deniers. even when it comes to math.
Well Ian, I`m not wirebender.
But I always had an issue with it when people use the above equation to quantify how much CO2 absorbs and re-emits back down.
Because CO2 at T2 deg K
does not absorb (T1^4 - T2^4) times the energy from a not so black body at T1 deg K. It can only absorb a tiny fraction of this energy at the quite narrow 15 µm band.
And when you actually
MEASURE it how much, as Heinz did then you can see that it is only 1/80 th of what the IPCC says it does...and still use in their computer models.
Heinz Hug`s direct measurements were dead accurate and you get the same values with the calculations that Gerlich and Tscheuschner did.
You should read it:
http://arxiv.org/PS_cache/arxiv/pdf/0707/0707.1161v2.pdf
I can`t take the credit for finding the English translation on the internet.
Somebody who writes here at the US mssgboard found it and mailed it to me....which I really appreciate,...because if I translate the original German paper and quote it, then you would call it "long winded".
Well quantum physics is a bit "long winded" and I don`t know of any publication where it`s formatted like some brochure that you can read while you are in a waiting room and walk away with a degree in physics.
...Like they do on enviro.org blogs...or the AGW favorite "Skepticalscience" web log short little bible stories that our warmer alarmists like quoting over and over again.