Job offer

European Commission; France; Sur place; EUR 28 000 - 40 000; Plein temps

Résumé du poste

Une organisation de recherche spécialisée en sciences de la Terre cherche un chercheur postdoctoral motivé pour rejoindre un projet sur la reconstruction des changements climatiques passés en Afrique. Le candidat réalisera des analyses avancées sur des sédiments collectés au lac Fitri, en utilisant des techniques novatrices d'isotopie et en collaborant étroitement avec d'autres chercheurs.

Qualifications

• PhD en Earth Sciences, paleo-hydrologie, ou paléoclimatologie.
• Expertise prouvée en géochimie isotopique de l'oxygène.
• Expérience souhaitée en analyse isotopique de l'oxygène triple.

Responsabilités

• Analyser des assemblages de diatomées.
• Déterminer la composition isotopique de l'oxygène.
• Participer à la préparation des échantillons et aux mesures de spectrométrie laser.

Connaissances

Expertise en géochimie isotopique

Techniques de spectrométrie laser

Fluence en anglais

Formation

Doctorat en Sciences de la Terre, hydrologie-paléologique ou paléoclimatologie

Description du poste

Organisation/Company CNRS Department Centre de Recherche et d'Enseignement des Géosciences de l'Environnement Research Field Environmental science Biological sciences Geosciences Researcher Profile Recognised Researcher (R2) Country France Application Deadline 8 Jul 2025 - 23:59 (UTC) Type of Contract Temporary Job Status Full-time Hours Per Week 35 Offer Starting Date 1 Sep 2025 Is the job funded through the EU Research Framework Programme? Not funded by a EU programme Is the Job related to staff position within a Research Infrastructure? No

Offer Description

We are seeking a postdoctoral researcher to join a project funded by the French National Research Agency (ANR), titled PAST-17, or “Past Dynamics of Continental Atmospheric Humidity and Vegetation: New Insights from Triple Oxygen Isotope Composition”. The objective is to reconstruct past hydrological changes and relative humidity using a combined model-data approach, in collaboration with the PAST-17 research group.

The selected candidate will work on a sediment core collected in 2024 from Lake Fitri, located in the Sahelian zone (Chad), to reconstruct Holocene hydroclimatic variations using diatoms. The researcher will analyze diatom assemblages using microscopic techniques and determine their triple oxygen isotope composition using laser fluorination coupled with laser-IRMS spectrometry. Currently, there is a lack of quantitative paleo-hydroclimatic data for the Sahel region.

The researcher will be based at CEREGE, a recognized interdisciplinary Earth Sciences research center, and will join the Climate Research Group (Group Link). Close collaboration is expected with the PANISS laboratory group . A PhD student will work in parallel on the sedimentological and mineralogical analysis of the same core.
This project is part of the VIABELEAUX International Joint Laboratory ("Viability of Sahelian Lake Ecosystems under Global Change"), a French-Chadian collaboration funded by IRD, focused on studying the evolution of Lake Fitri in the context of climate change.

We are looking for a motivated and creative candidate holding a PhD in Earth Sciences, paleo-hydrology, or paleoclimatology, with proven expertise in stable oxygen isotope geochemistry. Prior experience with triple oxygen isotope analysis (mass-dependent fractionation) is highly desirable. Fluency in English and strong collaborative skills are essential. The position will also require active participation in sample preparation and laser spectrometry measurements.