“The remaining 98.43% of local weather forcing arises from sources aside from anthropogenic CO2.” —Davis, 2025
In terms of local weather forcing, “atmospheric CO2 performs a minor and diminishing position in forcing up to date world warming.” [some emphasis, links added]
Key quotes from Davis, 2025
“Because of at the moment’s larger concentrations of CO2 within the environment, the radiative forcing energy of CO2 has dropped to lower than one-third of the forcing energy in 1750. …
“The forcing attributable to atmospheric CO2 is so small relative to the Earth’s vitality funds that 80% of warmth captured by CO2 is mirrored again into house by aerosols. …
“If the focus of CO2 in Earth’s environment continues to extend exponentially because it has since up to date measurements started 67 years in the past (see under), then the incremental contribution of CO2 forcing to world warming will proceed to say no exponentially as a result of the forcing energy of CO2 wanes with larger CO2 concentrations owing to the aforementioned diminishing returns in marginal forcing. …
“These contributions of CO2 to temperature forcing have to be evaluated towards the above demonstration that 6.27% of RFCO2 [radiative forcing from CO2] between 1750 and 2020 is attributable to anthropogenic CO2 (Determine 1) whereas the remaining 93.73% is pure in origin.
“It follows that even when up to date world warming had been 100% attributable to will increase within the atmospheric focus of CO2 as a substitute of the estimated 25%, 6.27% of this forcing can be attributable to human-sourced emissions of CO2.
“Utilizing the extra refined empirical estimates of CO2 contributions developed above, the place roughly one-fourth of whole forcing is attributable to atmospheric CO2, the utmost contribution of human-sourced CO2 to up to date world warming is estimated quantitatively from empirical knowledge as 6.27% (the computed contribution of anthropogenic CO2 forcing from 1750 to 2020, above) of 25% (the approximate imply empirical estimate of CO2 forcing of temperature, above), or 1.57% of whole temperature forcing.”
Different conclusions from the examine:
■ The total focus of CO2 (420 ppm) presently supplies solely 0.0058% of the Earth’s floor vitality, which is imperceptible.
■ There’s a unfavorable correlation (r = -0.19) between CO2 and temperature (i.e., CO2 rises as temperature falls, or temperature rises as CO2 falls) during the last 425 million years.
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