Marie-Charlotte Geffray
Climate Data Analyst
Climate Policy Analysis

Marie-Charlotte joined Climate Analytics as a Junior Data Analyst in 2022. She is working with the Climate Policy Team on two main projects: the Climate Transparency Report and the Climate Action Tracker. Her work involves supporting the team through data management and analysis.
Marie-Charlotte holds a master’s degree (M.Sc.) in Earth, Planetary and Environmental Sciences, with a major in Volcanology from the University of Paris, and a diploma in Data Analysis from the Panthéon-Sorbonne University. Before joining Climate Analytics, Marie-Charlotte traveled for several months in East Africa. During this time, she has supported and elaborated humanitarian and environmental projects, in partnership with local populations.
Publications
- Gonzales-Zuñiga, Heck, Grant, Forner, Hare, Dacie, Khan, Geffray, Missirliu, Hoppe, Jeffery, Hans, Höhne. Three key near-term actions could bend the warming curve; bringing projected warming below 2°C. (2025)
- Gonzales-Zuñiga, Heck, Forner, Hare, Dacie, Khan, Geffray, Missirliu, Hoppe, Jeffery, Hans, Höhne. Climate Action Tracker: 2025 warming projection update. (2025)
- Grant, Forner, Geffray, Hare, Khan, Welder, Tsekeris, Gong, Lécuyer, Müßel, Luderer. Rescuing 1.5°C: new evidence on the highest possible ambition to deliver the Paris Agreement. (2025) https://doi.org/10.5281/zenodo.18234421
- Kanduth, Geffray, Brodner, Razak, Kellou, Coetzee, Hare. Clearing the air on methane: a global review of emissions, ambition and the policy landscape. (2025)
- 1.5°C-aligned 2030 and 2035 GHG emissions targets
- Petroni, Hare, Grant, Geffray, Waterton, Höhne, Jeffrey, Hecke. Decarbonising light-duty vehicle road transport. (2024)
- Schumer, Boehm, Jaeger, Fyson, Hecke, Jeffery, Levin, Collins, Daly, Nilsson, Thwaites, Waite, Lebling, Sims, Naimoli, Lee, Castellanos, Grier, Singh, Geffray, Petroni, Santo, Balehegn, Riaz, Grant. Methodology underpinning the State of Climate Action series: 2024 update. (2024) https://doi.org/10.46830/writn.23.00043.v2


