Global climate transition are fascinating because their cause is always mysterious but holds secrets of climate dynamics, their interactive driving factors and the associated thresholds.
Maybe because we are going through one of them, caused by ourselves, it is a focus of increasing scientific interest and controversies.
I am particularly interested in climate transitions in the Paleogene. Most of all, the Eocene-Oligocene Transition that marks the shift from Greenhouse to Icehouse states with the formation of the Antarctic ice sheet 34 million years age.
This transition holds the key to understanding the cause of Cenozoic cooling and the Carbone cycle. But other transitions in the Paleogene also provide insight into this. The Paleocene Eocene Thermal Maximum (PETM, 56 Ma) and the Mid Eocene Climate Optimum (MECO, 41 Ma).