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How to Think About Climate Change - William Happer


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Excellent video - Thanks

 

I came across this well put comment recently.

 

 

April 10, 2021 at 6:52 pm | #

CO2 really only has three narrow absorption bands in the IR region. First off, all other IR wavelengths pass right through and go to space, talking about upward IR radiation from Earth’s surface.

That said, the equivalent temperatures to these three absorption bands are 800, 407, and -80 deg C.
As nothing on the planet is at 407 deg C, let alone 800 deg C, the only IR that could interact with CO2 is that given off by an object at -80 deg C.

So, CO2 absorbs IR equivalent to -80 deg C, which the planet is doing 24/7 because EVERYTHING is hotter than that. CO2 would be saturated with -80 IR all the time and all it would do is re-emit it. Downward emissions would be reflected because everything is hotter than that and those energy levels would be full and the upward emissions would be sent to space.

During daytime, solar radiation would energize all three absorption bands, because the sun is that much hotter, and re-emit the IR in all directions, actually sending some incoming energy to space. However, this is an undetectable amount of energy.

It is during night-time that CO2, with no solar input, would work avidly to convert energy in the atmosphere to -80 deg C IR, which would be radiated to space or reflected by the surface, which is always hotter and then again lost to space.

There is simply no way that a picket fence with only one picket (-80 deg C) can keep a dog in the yard. The same is true for water vapor—it has a wider absorption region but a large part of it is below 0 deg C down to overlapping CO2 at -80 deg C. And the vast majority of Earth’s surface is above 0 deg C.

The fun part is that scientists have been trying for years to get CO2 to warm and do something useful. Instead, they have discovered that CO2 is a great refrigerant. First off, CO2 sitting idly will always be emitting at -80 deg C, thus constantly depleting the internal energy of the system. And then it has relatively mild conditions that can allow it to undergo liquification and gasification in a refrigeration cycle. Imagine what a cheap, nontoxic, and environmentally friendly CO2 would be—we can simply stop using all the Dupont CFCs and HFCs and Dupont will have to find another venue stream. Mercedes-Benz is already using CO2 in their automobiles’ A/C and a number of new skating rinks are using CO2.

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