Hydro-biogéochimie de la zone critique
Once upon a time was… the Critical Zone. A thin film at the surface of the continents, extending from the fresh bedrock up to the lower atmosphere above the canopy, hosting almost all life on Earth, including humanity and the resources on which we depend.
Our research team is developing an integrated approach for the study of the critical zone and its dynamics, scrutinizing and analyzing the major cycles of elements such as carbon, water, nutrients, and the couplings between these hydro-biogeochemical cycles — especially in the intertropical belt.
For this, we combine in situ measurements, analytical laboratory techniques, advanced spatial observations, and multi-scale modeling in observatories (SNO) — whose size ranges from the soil plot to the continental watershed, including small catchments. Our goal? Understand and predict the interactions between minerals, fluids and living things in the context of the Anthropocene.
Research questions
1. “Big” biogeochemical cycles – water & carbon – in the Critical Zone
- Terrestrial water cycle, from climatic to convective scales
- Hydrosystems: Dr Jekyll or Mr Hyde of the greenhouse gases cycles?
- Fluxes of water, solid phases and bacteria: Flux d’eau, particules et bactéries: dangerous liaisons?
2. Life – fluid – rock interactions
- Vertical transfers, rhizosphere & regolith: exploring uncharted territories?
- Tropical ecohydrology in a changing world
- Water and humans in the critical zone
Geographical areas & observatories
- SNO* AMMA-Catch : Mali, Niger, Benin, Sénégal…
- SNO HYBAM : Bolivia, Brazil, Ecuador, Peru, Venezuela, French Guiana…
- SNO M-TROPICS : Cameroon, India, Laos, Vietnam…
- Réseau de Mesure de la Qualité des Sols (RMQS) : Occitanie
- Central Africa: Gabon
- (sub)arctic boreal area : Sweden, Siberia…
- North Africa: Morocco…
* SNO : national observation service (in French)
Team leaders
Priscia OLIVA & Jean RIOTTE
Actualités du laboratoire GET
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