Guest post by David Middleton
Featured image borrowed from here.
Nearly every catastrophic global warming doomsday scenario, particularity those involving icecap failures and Noah-size sea level rises are based on the “RCP 8.5” scenario.
Representative Concentration (or Carbon)Pathway 8.5 assumes a “rising radiative forcing pathway leading to 8.5 W/m² in 2100.” It is generally assumed, with little dissent, that each doubling of the atmospheric CO2 concentration will add 3.7 W/m² to the net infrared radiative flux.
A doubling of the supposedly stable pre-industrial CO2 level (280 ppmv to 560 ppmv) should yield 3.7 W/m² of additional forcing to the net infrared radiative flux. In order to get 8.5 W/m², the atmospheric CO2 concentration would have to rise to 1,370 ppm…
Note: Yes. The above is from SkepSci. I checked the math. It’s close enough.
Does any sane person really believe that the atmospheric CO2 concentration could rise from the current…
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