A5074579866- Climate change and permafrost
- Cryospheric studies and observations
- Groundwater flow and contamination studies
- Peatlands and Wetlands Ecology
- Soil and Unsaturated Flow
- Geology and Paleoclimatology Research
- Hydrology and Watershed Management Studies
- Methane Hydrates and Related Phenomena
- Wastewater Treatment and Nitrogen Removal
- Science and Climate Studies
- Geological Studies and Exploration
- Lattice Boltzmann Simulation Studies
- Advanced Mathematical Modeling in Engineering
- Heat and Mass Transfer in Porous Media
- Landslides and related hazards
- Arctic and Antarctic ice dynamics
- Hydrocarbon exploration and reservoir analysis
- Bryophyte Studies and Records
- Enhanced Oil Recovery Techniques
- CO2 Sequestration and Geologic Interactions
- Grouting, Rheology, and Soil Mechanics
- Water Treatment and Disinfection
- Fermentation and Sensory Analysis
- Polymer-Based Agricultural Enhancements
- Landfill Environmental Impact Studies
Géosciences Environnement Toulouse
2015-2024
Centre National de la Recherche Scientifique
2017-2024
Observatoire Midi-Pyrénées
2013-2023
Abisko Scientific Research Station
2023
Université Toulouse III - Paul Sabatier
2014-2023
Université de Toulouse
2014-2023
Institut de Recherche pour le Développement
2017-2023
Swedish Polar Research Secretariat
2023
École Nationale Supérieure des Mines de Nancy
2008
Abstract To quantify the impact of evapotranspiration phenomena on active layer dynamics in a permafrost‐dominated forested watershed Central Siberia, we performed numerical cryohydrological study water and energy transfer using new open source cryohydrogeology simulator, with two innovative features: spatially distributed, mechanistic handling inclusion tool high‐ performance computing toolbox for simulation fluid dynamics, OpenFOAM. In this region, heterogeneity solar exposure leads to...
Quantitative simulation of permafrost dynamics, both under current climatic conditions and future climate change scenarios, presents significant challenges. These include, but are not limited to, long computation times, the construction accurate surface boundary conditions, estimation transfer properties for soil, organic matter, vegetation layers that cover (sub-)Arctic regions. The challenges exemplified by broad range scenarios near-surface evolution change, as indicated models. from...
Due to accelerating global warming [1], the polar regions, and in particular Arctic, are subject many changes cascading effects [2]. Northern lands facing a generalized rise soil temperature causing surface cover [3], hydrological mechanical state of subsoil including permafrost thaw [4], [5] potentially triggering massive release greenhouse gases [6]. As land is key control parameter for state, survey great importance. Consequently, monitoring evolution boreal ecosystems over large time...
Permafrost, i.e., soil that is year-round frozen in depth, covering a quarter of the continents northern hemisphere. It currently experiences fast changes due to climate change at global scale and technogenic perturbations local scale, assessment anticipation these are primary importance for many environmental engineering applications cold regions. To ends, permafrost modelling required, while strong couplings non-linearities involved physics stake make it highly challenging, especially from...
Abstract. Due to its insulating and draining role, assessing ground vegetation cover properties is important for high-resolution hydrological modeling of permafrost regions. In this study, morphological effective hydraulic Western Siberian Lowland samples (lichens, Sphagnum mosses, peat) are numerically studied based on tomography scans. Porosity estimated through a void voxels counting algorithm, showing the existence representative elementary volumes (REVs) porosity most samples. Then, two...
A land cover map of two arctic catchments near the Abisko Scientific Research Station was obtained based on a classification from Sentinel-2 satellite image and ground survey performed in July 2022. The contiguous catchments, Miellajokka Stordalen, are covered by various ecotypes, boreal forest to alpine tundra peatland. Two algorithms, support vector machine random forest, were tested gave very similar results. percentage correctly classified pixels over 88% both cases. developed workflow...
Abstract In subsurface systems, biofilm may degrade organic or organometallic pollutants contributing to natural attenuation and soil bioremediation techniques. This increase of microbial activity leads change the hydrodynamic properties aquifers. The purpose this work was investigate influence biofilm‐induced heterogeneities on solute transport in porous media more specifically dispersivity. We pursued goal by (i) monitoring both spatial concentration fields breakthrough curves from...
RichardsFoam3 is an updated version of the OpenFOAM® solver RichardsFoam, previously presented in "An open source massively parallel for Richards equation: Mechanistic modelling water fluxes at watershed scale" by L. Orgogozo, N. Renon, C. Soulaine, F. Hénon, S.K. Tomer, D. Labat, O.S. Pokrovsky, M. Sekhar, R. Ababou, Quintard (Comput. Phys. Commun. 185 (2014) 3358-3371, https://doi.org/10.1016/j.cpc.2014.08.004), and new announcement "RichardsFOAM2: a RichardsFOAM devoted to vadose zone"...
Transport of biologically reactive dissolved solutes in a saturated porous medium including biofilm-phase occurs various technological applications such as biochemical or environmental engineering. It is complex process involving wide variety scales (from the bacteria-scale to aquifer-heterogeneities-scale case groundwater remediation) and processes (hydrodynamic, physicochemical biochemical). This work devoted upscaling pore-scale description processes. Firstly, one-equation macroscopic...
Abstract. Permafrost thawing as a result of climate change has major consequences locally and globally, both for the biosphere human activities. The quantification its extent dynamics under different scenarios is needed to design local adaptation mitigation measures better understand permafrost feedbacks. To this end, numerical simulation can be used explore response soil thermal hydrological regimes changes in climatic conditions. Mechanistic approaches minimise modelling assumptions by...
Abstract. Permafrost thawing as a result of climate change has major consequences locally and globally for the biosphere well human activities. The quantification its extent dynamics under different scenarios is needed to design local adaptation mitigation measures better understand permafrost feedbacks. To this end, numerical simulation can be used explore response soil thermo-hydric regimes changes in climatic conditions. Mechanistic approaches minimize modelling assumptions by relying on...