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this article references many of the high profile skeptics and they all accept the greenhouse effect with H2O being the main constituent but with CO2 having a part.
the skeptical 'consensus', if you will, is that doubling CO2 will cause ~1.2C surface increase, that the immediate climate response is ~1.6C, and that feedbacks will not (cannot) lead to runaway warming.
this article references many of the high profile skeptics and they all accept the greenhouse effect with H2O being the main constituent but with CO2 having a part.
the skeptical 'consensus', if you will, is that doubling CO2 will cause ~1.2C surface increase, that the immediate climate response is ~1.6C, and that feedbacks will not (cannot) lead to runaway warming.
The GHE is not an increase in heat, does not involve CO2 ‘creating’ heat, and does not violate COE. All wrong conceptualizations of AGW basics. Earth’s heat energy input is provided by solar ISR, at about a constant 240wm-2 (Monckton FoC #3 table 1, and Nick Stokes comments to Fubar). GHE is the result of certain gas molecules, most importantly water vapor and CO2, ‘absorbing’ and then ‘scattering’ by omnidirectional re-emission, OLR photons. That is, those atmospheric molecules hinder OLR radiative cooling from Earth’s surface to space. A surface warmed by ISR but not cooled by an equivalent amount of OLR will warm until the increase in resultant surface temperature produces enough additional OLR to restore the net balance. That is the simple essence of the GHE. The precise calculations involve the Stephan-Boltzman law, altitude lapse rates, and other complicated considerations—but those details are not material to this conceptual general post. The net rebalanced temperature equilibrium where net incoming again equals net outgoing radiation energy for a doubling of CO2 is called the equilibrium climate sensitivity (ECS). More practically (concerning observational energy balance model (EBM) calculations of it), the ‘effective climate sensitivity’. (The difference between ‘equilibrium’ and ‘effective’ involves variations over very long time frames to minor stuff like vegetative albedo changes over many centuries. You want the highest ECS, go long like Hansen’s 1000 years paper. We neglect those additional quibbles in this post as a mere sideshow distraction.)
Tyndall first experimentally determined that H2O and CO2 gasses have this OLR retarding property in 1858-9, as reported then to the Royal Society. Lest anyone think this basic physics is wrong (aka Sky Dragons), experimentally deserts are relatively dry so relatively low water vapor. That is why they cool sharply on cloudless nights. Anyone can run this climate experiment for themselves in any desert to verify this for themselves. (But take along a real good sleeping bag water vapor substitute to remain comfortable.) Low atmospheric water vapor does not hinder OLR radiative night cooling from the ISR heated daytime surface. CO2 is the same, except since reasonably well-mixed deserts won’t show the same desert night cooling effect.