April 1, 2016


Christina Ravelo
University of California, Santa Cruz

*Please note that there was an audio problem with his recording and as a result the video starts at the point where the audio becomes audible.

Major Features of a Globally Warm Period The Pliocene had atmospheric CO2 levels only modestly higher than pre-industrial times, and yet Pliocene climate was markedly different that today: global temperatures were 2 - 3 degrees warmer, permanent El Niño - like conditions prevailed, the equator - to - pole temperature gradient was reduced, the interior ocean was better ventilated, and sea levels were substantially higher due to warm high latitude conditions and ice sheets that were smaller than present. The fidelity of these observations, and their implications for understanding the Earth’s long - term climate sensitivity to greenhouse gas forcing, will be discussed.