Inscrit le: 07 Oct 2017
|Posté le: Lun 4 Déc - 10:31 (2017) Sujet du message: Paper: CO2 is a very weak greenhouse gas.
The well-known absorption properties of CO2 and the physics of thermal radiation permit to estimate the infrared absorption of the atmospheric CO2.
The earth is considered as a homogeneous spherical black body emitter with a temperature of 288 K. An idealized atmosphere, the CO2 content of which is the only infrared absorber, surrounds the emitter.
The CO2 concentration at sea level amounts to 400 ppm and the density exponentially tapers off with height. Accordingly, the average black body temperature contains the so-called greenhouse contribution.
Over 200’000 discrete absorption lines of CO2 are used for the numerical calculations. If the absorbed energy is converted entirely into heat, we deliberately overestimate the heat retention capability of CO2.
The thermal occupation statistics of the CO2 energy states plays a key role in these calculations. The calculated heat retention is converted into a temperature increase.
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