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Another study finds CO2’s greenhouse effect contribution and climate sensitivity are much smaller than claimed by the IPCC and proponents of anthropogenic global warming.

Ollila (2019) reconfigures the “consensus”-derived greenhouse effect radiation values and finds (a) LW absorption only adds 45% to Earth’s present atmospheric greenhouse effect, (b) water vapor dominates (76.4%) the total greenhouse effect whereas CO2’s contribution is minimal (7.3%), and (c) CO2 climate sensitivity is just 0.6°C upon doubling.

The reconfiguration eliminates the “physical contradiction” of having a 155.6 W/m² create an energy flux of 345.6 W/m² by rejecting the claim that the entire longwave energy flux is from greenhouse gases.

Further, CO2’s total temperature contribution to the greenhouse effect is reduced from 7.2°C to 2.4°C, which better aligns with the climate sensitivity (doubled CO2) estimate of 0.6°C.