![]() The hypothesis was supported for the Bølling-Allerød and Preboreal period, but not for Dansgaard–Oeschger interstadials, although there are still debates on the topic. These warming events would have caused the Bond Cycles and individual interstadial events, such as the Dansgaard–Oeschger interstadials. Despite its atmospheric lifetime of around 12 years, methane's global warming potential is 72 times greater than that of carbon dioxide over 20 years, and 25 times over 100 years (33 when accounting for aerosol interactions). This would have had an immediate impact on the global temperature, as methane is a much more powerful greenhouse gas than carbon dioxide. ![]() The idea is that changes in fluxes in upper intermediate waters in the ocean caused temperature fluctuations that alternately accumulated and occasionally released methane clathrate on upper continental slopes. The clathrate gun hypothesis is a proposed explanation for the periods of rapid warming during the Quaternary. ![]() The impact of CH 4 atmospheric methane concentrations on global temperature increase may be far greater than previously estimated.
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