Chloé Franca Margot Marcilly

• Ontiveros, Daniel Eliahou; Beaugrand, Gregory; Lefebvre, Bertrand; Marcilly, Chloe M.; Servais, Thomas & Pohl, Alexandre (2023). Impact of global climate cooling on Ordovician marine biodiversity. Nature Communications. ISSN 2041-1723. 14. doi: 10.1038/s41467-023-41685-w. Full text in Research Archive
• Marcilly, Chloe M.; Torsvik, Trond Helge & Conrad, Clinton Phillips (2022). Global Phanerozoic sea levels from paleogeographic flooding maps. Gondwana Research. ISSN 1342-937X. 110, p. 128–142. doi: 10.1016/j.gr.2022.05.011. Full text in Research Archive
• Marcilly, Chloe M.; Maffre, Pierre; Le Hir, Guillaume; Pohl, Alexandre; Fluteau, Frédéric & Godderis, Yves [Show all 9 contributors for this article] (2022). Understanding the early Paleozoic carbon cycle balance and climate change from modelling. Earth and Planetary Science Letters. ISSN 0012-821X. 594. doi: 10.1016/j.epsl.2022.117717. Full text in Research Archive
• Marcilly, Chloe M.; Torsvik, Trond Helge; Domeier, Mathew Michael & Royer, Dana L. (2021). New paleogeographic and degassing parameters for long-term carbon cycle models. Gondwana Research. ISSN 1342-937X. 97, p. 176–203. doi: 10.1016/j.gr.2021.05.016. Full text in Research Archive Show summary

  Long-term carbon cycle models are critical for understanding the levels and underlying controls of atmospheric CO2 over geological time-scales. We have refined the implementation of two important boundary conditions in carbon cycle models, namely consumption by silicate weathering and carbon degassing. Through the construction of continental flooding maps for the past 520 million years (Myrs), we have estimated exposed land area relative to the present-day (fA), and the fraction of exposed land area undergoing silicate weathering (fAW-fA). The latter is based on the amount of exposed land within the tropics (±10°) plus the northern/southern wet belts (40-50°N/S) relative to today, which are the prime regions for silicate weathering. We also evaluated climate gradients and potential weatherability by examining the distribution of climate-sensitive indicators. This is particularly important during and after Pangea formation, when we reduce fAW-fA during times when arid equatorial regions were present. We also estimated carbon degassing for the past 410 Myrs using subduction flux from full-plate models as a proxy. We then, for the first time, used the subduction flux to scale and normalize the arc-related zircon age distribution (arc-activity), which allows us to estimate carbon degassing in much deeper time. The effect of these refined modelling parameters for weathering and degassing was then tested in the GEOCARBSULF model, and the results are compared to other climate models and CO2 proxies. The use of arc-activity as a proxy for carbon degassing brings Mesozoic model estimates closer to CO2 proxy values but our models are highly sensitive to the definition of fAW-fA. Considering the land availability to weathering to only variations in tropical latitudes (corrected for arid regions) combined with our new degassing estimates leads to notably higher CO2 levels in the Mesozoic and a better fit with the CO2 proxies.

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• Marcilly, Chloe M.; Torsvik, Trond Helge & Conrad, Clinton Phillips (2024). Corrigendum to “Global Phanerozoic sea levels from paleogeographic flooding maps” [Gondwana Res. 110 (2022) 128–142, (S1342937X22001563), (10.1016/j.gr.2022.05.011)]. Gondwana Research. ISSN 1342-937X. 129, p. 367–368. doi: 10.1016/j.gr.2024.01.006.
• Marcilly, Chloe M. (2022). Understanding the early Paleozoic carbon cycle balance and climate change from modelling.
• Marcilly, Chloe M.; Torsvik, Trond Helge; Domeier, Mathew Michael & Royer, Dana L. (2021). Revising key parameters for long-term carbon cycle models.
• Marcilly, Chloe M.; Torsvik, Trond Helge; Domeier, Mathew Michael & Royer, Dana L. (2021). Refining key parameters for long-term carbon cycle models.
• Marcilly, Chloe Franca Margot & Torsvik, Trond H. (2020). The impact of paleogeography on long-term CO2 models .
• Marcilly, Chloe Franca Margot & Torsvik, Trond H. (2020). Improving long-term CO2 models for the Phanerozoic: What can be done?

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