Louis Decline

CIRAD

Engineer / Jan 2025 to Jan 2028

Support for measuring atmospheric gas fluxes in grasslands (eddy‑covariance flux tower)

The mission consists in installing a new‑generation flux tower in one of the two livestock farms in French Guiana where a greenhouse‑gas measurement system had already been deployed and kept operational between 2010 and 2019.

Ensure field logistics (installation and maintenance of equipment, data backup).

Contribute to analysing and valorising the data produced, and collaborate with the two postdoctoral researchers involved in the project.

Organise and coordinate a network of technical and scientific expertise with teams in French Guiana, Brazil and mainland France.

Renaud Koukoui

UMR Hydrosciences Montpellier

PhD Student / June 2026 to Nov 2027

Energy, water and carbon flux data acquisition and processing engineer

 I am responsible for the complete management of Eddy‑Covariance (EC) data. My mission consists in centralising raw data and carrying out all processing and quality‑control steps up to their dissemination to the international scientific community. I oversee the harmonisation and standardisation of post‑processing protocols across the site network, ensuring compliance with international standards such as FLUXNET. This inter‑site consistency work is essential to guarantee the comparability and reliability of the data produced.

I also perform in‑depth data qualification, including cross‑site comparative analyses, carbon and energy flux partitioning, and gap‑filling procedures tailored to each dataset. Finally, I contribute to the scientific valorisation of the project by participating in the writing of data papers and scientific articles.

Taeken Wijmer

UMR Hydrosciences Montpellier

Postdoctoral researcher / Sept 2025 to Sept 2027

Modelling interactions between the energy, water and carbon cycles in Sahelian agroforestry systems

My objective is to improve the understanding of the processes that control the water and carbon fluxes observed at the eddy‑covariance sites located near Niakhar. The study area is equipped with four eddy‑covariance stations measuring carbon, water and energy fluxes over agro‑silvo‑pastoral plots. These plots are representative of local practices: they are mainly cultivated in a millet–groundnut rotation during the rainy season and grazed during the dry season. In these agroecosystems, a sparse tree cover—particularly Faidherbia—provides shade for livestock during the dry season thanks to its reverse phenology, which allows it to access deep water resources.

To study this agroecosystem and quantify the processes controlling primary production, water use, the type of water taken up by vegetation (rainwater vs. groundwater), and the influence on the local energy balance, I rely on simulations performed with the SISPAT land‑surface model.