Abstract

The question is raised whether the by now widely accepted warming our planet will undergo in the sequel of the anthropogenic CO 2 and other greenhouse gas production is really unprecedented and if not, how did the paleoclimate look like in the past and what happened to bring about similar warmings. The results of the Vostok Antarctic, ice core analysis give record of the atmospheric CO 2 concentrations and temperature variations during the last 160,000 years including the two last major glaciations and several moderate ice ages. The periodicity of atmospheric CO 2 concentration and temperature variation suggest that orbital forces are at the origin of these fluctuations as proposed by M. Milankovič in 1920. Accordingly, the moderate ice age our planet will undergo within the next 20–22,000 years in any case, will be delayed by some 2000 years if the combustion of fossil fuels together with the generation of other greenhouse gases continues at the actual or at an even more pronounced rate.

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