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Warmism: Credible Politics, Incredible Science

November 4, 2013

Watts Up With That?

Guest essay by Paul Murphy

Here’s Wikipedia’s simplified but canonical description of the greenhouse effect:

 

The greenhouse effect is a process by which thermal radiation from a planetary surface is absorbed by atmospheric greenhouse gases, and is re-radiated in all directions. Since part of this re-radiation is back towards the surface and the lower atmosphere, it results in an elevation of the average surface temperature above what it would be in the absence of the gases.

Solar radiation at the frequencies of visible light largely passes through the atmosphere to warm the planetary surface, which then emits this energy at the lower frequencies of infrared thermal radiation. Infrared radiation is absorbed by greenhouse gases, which in turn re-radiate much of the energy to the surface and lower atmosphere.

This greenhouse effect forms the basis for warmist doctrine: that human CO2 emissions are causing a catastrophic increase in the global…

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