The following is a reply to article in regard to Elaborate Nonsense from 1896
by Peter Ravenscroft.
Derek found the 1901 review of Angström’s criticisms that was published in Monthly Weather Review. I’ve transcribed it below in case any of you might wish to cite it. What stands out for me especially is Angström’s claim that Arrhenius failed to distinguish water vapor’s absorption from CO2’s, thus leading to an over-estimate of CO2’s absorptive power.AS
Monthly Weather Review, June 1901, page 268
KNUT ANGSTROM ON ATMOSPHERIC ABSORPTION.
While the recent Bulletin G by Prof. F. W. Very, on atmospheric radiation was in press, Prof. Knut Angström of Upsala, was preparing a short paper on the part played by aqueous vapor and carbon dioxid gas in the phenomena of absorption in the earth’s atmosphere, which was published in the Annalen der Physik immediately afterwards. In this memoir based on unpublished researches of Dr. J. Koch at Upsala, on the absorption of radiation from heat sources at different temperatures by various depths of gas, Professor Angström approximately determines the influence of a layer of carbon dioxid gas 30 centimeters thick and under a pressure of 780 millimeters, absorbing the radiation from a black body at 100° temperature, and finds that it is about 10 per cent and that it does not change more than four-tenths of one per cent of the original radiation when the pressure is decreased to 520 millimeters. He infers, therefore, that a layer so thick as to be equivalent to that contained in the earth’s atmosphere will absorb about 16 per cent of the earth’s radiation, and that this absorption will vary very little with any changes in the proportion of carbon dioxid gas in the air. This limitation of the absorption to spectral regions between definite wave lengths is also rendered very probable by Paschen’s observations in the Annalen der Physik, volume 51, page 33.