A5072758777- Geology and Paleoclimatology Research
- Cryospheric studies and observations
- Landslides and related hazards
- Geological formations and processes
- Winter Sports Injuries and Performance
- Climate change and permafrost
- Geological and Geochemical Analysis
- Paleontology and Stratigraphy of Fossils
- Methane Hydrates and Related Phenomena
- Analytical Chemistry and Sensors
- Groundwater and Isotope Geochemistry
- Geological and Geophysical Studies Worldwide
- Arctic and Antarctic ice dynamics
- Soil erosion and sediment transport
- Geological Modeling and Analysis
- Image Processing and 3D Reconstruction
- Peatlands and Wetlands Ecology
- Invertebrate Taxonomy and Ecology
- Planetary Science and Exploration
- Hydraulic Fracturing and Reservoir Analysis
- Hydrocarbon exploration and reservoir analysis
- Remote Sensing and LiDAR Applications
Laboratoire de Planétologie et Géosciences
2017-2025
Centre National de la Recherche Scientifique
2014-2025
Le Mans Université
2016-2025
Nantes Université
2024-2025
Université Nantes Angers Le Mans
2025
Bridge University
2022
University of Cambridge
2022
Biogéosciences
2014-2016
Université de Bourgogne
2014-2015
In the context of climate change, ice sheets are strongly influenced by reorganization subglacial hydrological system and dynamics flow. Interactions between meltwater, flow sediments give rise to a unique assemblage periodic landforms composed known as bedforms. These bedforms therefore provide large-scale observational window into environment, which is difficult analyze beneath current masses.Mapping traditionally performed using digital elevation models (DEMs) and/or aerial or satellite...
We designed an automated tool to delineate and analyse the shape of subglacial bedforms using a recently defined land surface parameter, volumetric obscurance. The is based on assumption that diversity bedform shapes reflects continuum; therefore, unlike traditional methods, no pre‐ or post‐mapping classification performed. It uses digital elevation models optical satellite images generate regional morphological maps (bedform outlines crestlines) morphometric (spatialized statistical...
Abstract. Conceptual ice stream land systems derived from geomorphological and sedimentological observations provide constraints on ice–meltwater–till–bedrock interactions palaeo-ice beds. Within these systems, the spatial distribution formation processes of ribbed bedforms remain unclear. We explore conditions under which may develop their organization with (i) an experimental model that reproduces dynamics streams subglacial (ii) analysis selected examples beds Laurentide Ice Sheet. find a...
Abstract Subglacial meltwater landforms found on palaeo‐ice sheet beds allow the properties of drainage to be reconstructed, informing our understanding modern‐day subglacial hydrological processes. In northern Canada and Fennoscandia, are largely organized into continental‐scale networks corridors (SMCs), interpreted as relics systems undergoing variations in input, effective pressure efficiency. We review current state knowledge bedforms (hummocks, ridges, murtoos, ribbed bedforms)...
Abstract A pit located near B allyhorsey, 28 km south of D ublin (eastern I reland), displays subglacially deposited glaciofluvial sediments passing upwards into proglacial subaqueous ice‐contact fan deposits. The coexistence these two different depositional environments at the same location will help with differentiation between very similar and easily confused glacial lithofacies. lowermost show aggrading subglacial deposits indicating a constrained accommodation space, mainly controlled...
Abstract Tunnel valleys are elongated hollows commonly found in formerly glaciated areas and interpreted as resulting from subglacial meltwater erosion beneath ice sheets. Over the past two decades, number of studies terrestrial tunnel has continuously increased, their existence been hypothesized also on Mars, but formation mechanisms remain poorly understood. We introduce here an innovative experimental approach to examine by circulation pressurized within substratum at ice/substratum...
Abstract. Ice streams are corridors of fast-flowing ice that control mass transfers from continental sheets to oceans. Their flow speeds known accelerate and decelerate, their activity can switch on off, even locations shift entirely. Our analogue physical experiments reveal a life cycle incorporating evolving subglacial meltwater routing bed erosion govern this complex transitory behaviour. The modelled when water pockets drain as marginal outburst floods (basal decoupling). Then they...
Fluctuations in meltwater discharge below modern glaciers and ice sheets due to diurnal, seasonal long-term temperature variations are modulated by the subglacial hydrological system. The bed of palaeo-ice contains a palimpsest bedforms recording these modulations provides an open window into environment where complex interactions between drainage, basal processes bedform formation occur. Through morphometric analysis natural experimental bedforms, respectively mapped along Scandinavian...
Abstract Surging and streaming of glaciers are modulated by meltwater availability pressure which controls mechanical coupling at their beds. Using laboratory-scale experimental modelling palaeoglaciological mapping, we explore how subglacial drainage landsystems control efficiency ice flow velocities for terrestrial-based lobes resting on flat horizontal permeable Two end-members regimes, surging streaming, appear in our experiments. The surge regime is characterised a rapid increase...
Abstract. Ice streams are corridors of fast-flowing ice that control mass transfers from continental sheets to oceans. Their flow speeds known accelerate and decelerate, their activity switch on off, even locations shift entirely. Our analogue physical experiments reveal a lifecycle incorporating evolving subglacial meltwater routing bed erosion can govern this complex transitory behaviour. The model when water pockets drain as marginal outburst floods. Then they decelerate basal coupling...
Understanding the formation of subglacial bedforms is primordial to constrain ice-meltwater-bed interactions and dynamics past present ice sheets. However, difficulty observe active below present-day sheets implies that their evolution are essentially deduced from inversion morphological sedimentological data palaeo-subglacial bedforms. In this study, characteristics explored with a new approach based on combination three dimensionless morphometric indices i.e., circularity, sinuosity...
Abstract. Conceptual ice stream landsystems derived from geomorphological and sedimentological observations provide constraints on ice-meltwater-till-bedrock interactions palaeo-ice beds. Within these landsystems, the spatial distribution formation processes of ribbed bedforms remain unclear. We explore conditions under which develop their organisation with (i) an experimental model that reproduces dynamics streams subglacial (ii) analysis selected examples paleo-ice beds Laurentide Ice...