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.

Data sets

Continental temperature seasonality from Eocene Warmhouse to Oligocene Coolhouse A. Toumoulin, D. Tardif, Y. Donnadieu, A. Licht, J.-B. Ladant, L. Kunzmann, and G. Dupont-Nivet https://doi.org/10.1594/PANGAEA.930422

Model code and software

IPSL-CM5A-VLR branche IPSLCM5A2.1_11192019 IPSL Climate Modelling Centre http://forge.ipsl.jussieu.fr/igcmg/svn/modipsl/branches/publications/IPSLCM5A2.1_11192019

IPSL climate models documentation IPSL Climate Modelling Centre http://forge.ipsl.jussieu.fr/igcmg_doc/wiki/Doc/Config/IPSLCM5A2

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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.