Eocene-Oligocene Antarctic glaciation

Using phytoplankton calcite biominerals from equatorial Atlantic deep-sea cores, researchers found that tropical Atlantic sea surface temperatures may have started rising 4 million years prior to the Eocene-Oligocene Transition (EOT), which occurred around 33.7 million years ago, and that this process may have resulted in equatorial heat accumulation, thus contributing to polar cooling and growth of the first permanent Antarctic ice sheets at the EOT boundary. - Read at PNAS.org

Article #16-08100: “Equatorial heat accumulation as a long-term trigger of permanent Antarctic ice sheets during the Cenozoic,” by Maxime Tremblin, Michaël Hermoso, and Fabrice Minoletti.