Alexandre POHL

Research Positions

Project [3 years]: BioSIGNAL: Biological pump sensitivity and climate change – Interrogating past environmental perturbations. Modeling changes in deep-time marine planktonic communities and their impact on ocean biogeochemistry, with special focus on ocean oxygenation / anoxia.

Project [2 years]: Investigating and quantifying the impact of the paleogeographical changes on the potential for reef-carbonate development throughout the Cretaceous.

Project [3 years]: Numerical modeling for increased understanding of Ordovician climate. Supervisors: Yannick DONNADIEU (LSCE) and Guillaume LE HIR (IPGP).
Award: Van Straelen Prize from the French Geological Society (SGF).
Award: André Prud’homme Prize from the Meteo and Climate Association.

Ongoing projects

2024–2027 ANR (French National project): “Opening the black box of CYCLOstratigraphy: a mechanistic understanding of the pathway between astronomical forcing and marine SEDiments (CYCLO-SED)” [PI; 320 k€].
2023–2026 Leverhulme (British project): “Earth System dynamics at the dawn of the animal-rich biosphere“ [Co-applicant; PI: M. Williams; 455 k€].
2023–2024 French National Programm (INSU-CNRS): “RadiatiOnS and ExTincTions in eArly Paleozoic oceans: understanding the dynamics of the early marine biosphere (ROSETTA)” [PI; 15 k€].
2023 French National Programm (INSU-CNRS): “Widespread Oceanic Anoxia during the Weissert Event ? (WOAW)” [Partner; PI: M. Martinez; 9 k€].
2023–2026 ANR (French National project): “Evolution of the Cambrian-Ordovician Biodiversification Onset Over Space and Time (ECO-BOOST)“ [Partner; PI: B. Lefebvre; 473 k€].

Past projects

2019–2022 Marie Curie Global Fellowship (European project): “Biological pump sensitivity and climate change: interrogating past environmental perturbations (BioSIGNAL)“ [PI, 257 k€].
2015 French National Programm (INSU-CNRS): “Response of global marine biodiversity to a major climate change: modeling the Ordovician glaciation (445 Ma) with the MITgcm and its marine ecology model Darwin.“ [partner, significantly contributed to the design and writting of the project] (PI: Y Donnadieu).
2014 French National Programm (INSU-CNRS): “Ordovician microfossils and environment : did the Early Ordovician onset of cooling of the Early Palaeozoic Icehouse trigger the most important rise in biodiversity in the history of life on Earth?“ [partner] (PI: TRA Vandenbroucke).

Opportunities

⚠️ Full-funded PhD thesis opportunity in Earth system modeling available, applications welcome ! ⚠️

Ongoing work

Tristan VADSARIA, Post-doc, 2024–2026, “Improving the representation of continental weathering in the cGENIE model”. Advisor.
Alexis BALEMBOIS, PhD student, 2023–2026, “Study of global changes in biodiversity from 540 million years to now to better understand and anticipate future alterations in the context of anthropogenic climate change.” Co-adviser. Principal advisers: G. Beaugrand, B. Lefebvre.

Previous work

Alexis BALEMBOIS, Research Engineer, “Developing a model for the evolution of Phanerozoic marine biodiversity”.
Daniel ELIAHOU, M.Sc. 2nd year (ULCO), “Impact of global climate on biodiversity during the Ordovician”. Co-adviser. Principal adviser: G. Beaugrand.
Thanh Nam NGO, 2nd year (Polytech Orléans), “Simulating marine biodiversity using a coupled climate-biodiversity model”. Principal adviser. Co-adviser: A. Brayard.
Houda BEGHOURA, M.Sc. 1st year (Aix-Marseille University), “Impact of the growth of the Ordovician ice sheet on the atmospheric circulation and the carbon cycle”. Principal adviser. Co-adviser: Y. Donnadieu.
Mourad HAGGUI, M.Sc. 2nd year (Aix-Marseille University), “Coupling paleontological database and paleoceanographical modeling to investigate the paleobiogeography of Cretaceous reef carbonates”. Co-adviser. Principal advisor: J. Borgomano.

2021–2022: Member of the evaluation committee, Master in Earth Sciences, Université Libre de Bruxelles (Brussels, Belgium).

Journals

Funding agencies and associations