10/30/13

Permalink New paper demonstrates climate models don't even have the 'basic physics' of the greenhouse effect correct

A new paper published in Geophysical Research Letters inadvertently demonstrates that climate models don't even have the so-called 'basic physics' of the greenhouse effect correct. According to the paper, climate models show that "With CO2 at or below 1/8 of the 1950 value [i.e. ~39 ppm], runaway sea ice does occur as the planet cascades to a snowball Earth climate with fully ice covered oceans and global mean surface temperatures near – 30 °C." However, -30°C is much colder than the -18°C calculated* for an Earth with no atmosphere or oceans or greenhouse effect at all! Further, -30°C is much, much colder [i.e. 35°C colder] than the +5°C global mean temperature calculated using the IPCC formula** for CO2 forcing using a CO2 level of 39 ppm. It is astonishing that the authors, who claim to be top experts on the physics of CO2 radiative transfer, did not realize that their computer model is outputting physically-impossible GIGO.

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