Global ocean heat content over the past 3 million years - Nature

Nature, Published online: 18 March 2026; doi:10.1038/s41586-026-10116-3Estimates of mean ocean temperature based on noble gas (Xe/Kr) measurements in shallow ice cores from the Allan Hills blue ice area, Antarctica, indicate enhanced cooling around the Plio-Pleistocene Transition and enhanced ice sheet growth around the time of the Mid-Pleistocene Transition.