An empirical evaluation of earth's surface air temperature response to radiative forcing, including feedback, as applied to the CO2-climate problem
1984
Idso, S.B.
Several natural experiments are analyzed to yield equilibrium values of a surface air temperature response function and a feedback factor for Earths atmosphere. The former parameter, the change in surface air temperature induced by a change in radiant energy absorbed at the surface, is demonstrated to have a value of about 0.1 K (Wm–2)–1; while the latter parameter, the ratio of feedback-induced change in radiant energy to the surface of the Earth divided by an initial or primary change in radiant energy to the Earths surface, is demonstrated to have a value of about 1.25. These two numbers imply that the maximum warming to be expected from a doubling of Earths atmospheric CO2 concentration from 300 to 600 ppm is only about 0.1 K, a result so small as to possibly be completely counter-balanced by the CO2-induced reduction of solar radiation transmission to the Earths surface.
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