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For much of the last 250 million years the Earth has been warmer than today. Around 50 million years ago during the early Cenozoic era, the climate began to cool. A key threshold was crossed 35 million years ago and the Antarctic ice sheet began to grow – the first continental scale ice sheet in 300 million years that ultimately led to the establishment of our modern icehouse climate system. Using a combination of laboratory measurements and computer modelling to unravel the sequence of events, this project aims to understand what caused this fundamental transition of Earth’s climate from a warm “greenhouse” to relatively frigid “icehouse”.
