Earth Experienced A ‘Global Warming’ Event 55 Million Years Ago. What Is The Likely Cause Of The Final, Dramatic Pulse Of Warming During This Time?. The likely cause of the final, dramatic pulse of warming 55 million years ago during the global warming event on earth is believed to be the massive release of carbon dioxide into. A team of researchers, led by dr.

The likely cause of the final, dramatic pulse of warming 55 million years ago during the global warming event on earth is believed to be the massive release of carbon dioxide into. Analogous to the earth's current situation, greenhouse warming 55 million years ago was caused by a relatively rapid increase of carbon dioxide concentrations in the. A team of researchers, led by dr.