Articles | Volume 18, issue 2
Clim. Past, 18, 341–362, 2022
https://doi.org/10.5194/cp-18-341-2022
Clim. Past, 18, 341–362, 2022
https://doi.org/10.5194/cp-18-341-2022
Research article
28 Feb 2022
Research article | 28 Feb 2022

Evolution of continental temperature seasonality from the Eocene greenhouse to the Oligocene icehouse –a model–data comparison

Agathe Toumoulin et al.

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Short summary
Temperature seasonality is an important climate parameter for biodiversity. Fossil plants describe its middle Eocene to early Oligocene increase in the Northern Hemisphere, but underlying mechanisms have not been studied in detail yet. Using climate simulations, we map global seasonality changes and show that major contemporary forcing – atmospheric CO2 lowering, Antarctic ice-sheet expansion and particularly related sea level drop – participated in this phenomenon and its spatial distribution.