Maybe from somebody who actually measured it like this one:I have always wondered how a gas, that can not interact with LWIR, can stop anything. If the gas is incapable of interacting and is transparent to it, then it passes unabated... CO2 is incapable of stopping 99.6% of LWIR in our atmosphere as it is transparent to it. So how do they reconcile this loss? Trenbreth made this calculation mistake as well
What a friggin' moron. Wrong, plus he always exaggerates the precision.
Anyone who has seen a Planck curve for average surface temp, or the average surface temp plus or minus 50C, knows that the 15 micron (and wings) band that CO2 absorbs or right in the heart of the power output. I have heard it estimated at 8% of the total and that looks about right.
Where BillyBoob got his 0.4% number is a mystery. Judging from past performance he won't be explaining himself either.
The Climate Catastrophe - A Spectroscopic Artifact
"The radiative forcing for doubling can be calculated by using this figure. If we allocate an absorption of 32 W/m2 [14] over 180º steradiant to the total integral (area) of the n3 band as observed from satellite measurements (Hanel et al., 1971) and applied to a standard atmosphere, and take an increment of 0.17%, the absorption is 0.054 W/m2 - and not 4.3 W/m2.
This is roughly 80 times less than IPCC's radiative forcing."
To which I may add that as far as spectroscopy, remote sensing and various other detection systems is concerned, this is how I made a living in the employ of Bristol aerospace and similar companies and the US + Canadian Government . I can assure you that all of them would have designed a sensor that does not have to use cumbersome spectroscopy to determine ppm CO2 if temperature were driven by CO2 to the degree the so called "settled science" claims it does.
Instead there would be a simple sensor that would use a Wheatstone bridge thermocouple reference calibrated in ppm over a zero CO2 reference. But there is not ! Why not ? Because it can not detect the difference in temperature rise per 100 ppm or even 500 ppm as opposed to an irradiated cuvette with zero ppm CO2. You have to be in the > 10 % not the ppm range before a Wheatstone bridge thermistor could detect anything...just like in these idiotic bottle full of CO2 in the sun experiments can not if you had one with 200 and another with 400 ppm CO2. It`s nothing more than a silly a stunt to fool the naive public how CO2 heats the planet using several % and often 100% CO2 in a closed bottle baking in the sun as "scientific proof" and dress it up as back-radiation in terms of the StB equation.
Just to clear up confusion...
You are agreeing that CO2 absorbs surface produced radiation in the 15 micron band and wings. And that this energy warms the near surface atmosphere.
You are only arguing the size of the effect, and how it should be calculated. You are in total disagreement with SSDDs bizarre version of atmospheric physics.