A5043916965- Cryospheric studies and observations
- Geochemistry and Geologic Mapping
- Landslides and related hazards
- Winter Sports Injuries and Performance
- Climate change and permafrost
- Remote-Sensing Image Classification
- Soil Geostatistics and Mapping
- Spectroscopy and Chemometric Analyses
- Mineral Processing and Grinding
- Oceanographic and Atmospheric Processes
- Geology and Paleoclimatology Research
- Science and Climate Studies
- Arctic and Antarctic ice dynamics
- Geography Education and Pedagogy
- Meteorological Phenomena and Simulations
- Geotourism and Geoheritage Conservation
- Coastal and Marine Management
- Time Series Analysis and Forecasting
- Mediterranean and Iberian flora and fauna
- Urbanism, Landscape, and Tourism Studies
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Clay minerals and soil interactions
Université de Toulouse
2019-2024
Centre National de la Recherche Scientifique
2015-2024
Institut polytechnique de Grenoble
2023-2024
Université Grenoble Alpes
2023-2024
Institut de Recherche pour le Développement
2023-2024
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2023-2024
Institut des Géosciences de l'Environnement
2023-2024
University of Copenhagen
2023
Office National d'Études et de Recherches Aérospatiales
2016-2020
Institut Superieur de l'Aeronautique et de l'Espace (ISAE-SUPAERO)
2016-2017
Nowadays, satellite observations cover most of the Earth's surface in a repetitive manner. This information is crucial for documenting variability and environmental changes such as glacier velocity. With this mind, digital image processing has been developed improved over past decades. The challenges are now related to optimizing parameters that account high natural processes, well filtering aggregating results provide useful products end-users. Based on normalized cross correlation (NCC)...
Abstract. We present an analysis of glacier dynamics in mountain ranges the tropical Andes southern Peru and Bolivia using satellite data from 2013 to 2022. Despite challenges posed by small glaciers (width<500 m), low velocities (<100myr-1), high cloudiness during monsoon, we map annually aggregated surface quantify seasonal variability fastest parts glaciers. Limited trends are observed annual over last decade, but significant changes between wet dry seasons found, likely controlled...
Current climate warming leads to widespread glacier shrinkage in high alpine terrains and associated changes surface dynamics of de-glacierised environments. In consequence, slope instabilities increasingly develop along retreating glaciers through debuttressing effects or degrading permafrost conditions. the context hazards local environment infrastructure, a thorough analysis is highly relevant. Affected regions are mostly inaccessible cover large areas, therefore remote sensing techniques...
The glaciers of the Val Veny (Italian side Mont-Blanc Massif) have been site numerous field observations during last decades, in particular for study glacial fluctuations or surface processes related to debris cover. Here, we propose examine how satellite can complement measurements on state and fate glaciers. Indeed, products obtained a quasi-systematic way allow account not only loss volume, but also changes their flow velocities. overall pattern document is glacier thinning slowdown ice...
Clay minerals play an important role in shrinking–swelling of soils and off–road vehicle mobility mainly due to the presence smectites including montmorillonites. Since are composed different intimately mixed, accurate estimation its abundance is challenging. Imaging spectroscopy short wave infrared spectral region (SWIR) combined with unmixing methods a good candidate estimate clay mineral abundance. However, performance mineral-dependent may be enhanced by using appropriate preprocessings....
Documenting glacier surface flow velocity from a longer-term perspective is highly relevant to evaluate the past and current state of glaciers worldwide. For this purpose, satellite data are widely used obtain region-wide coverage data. Well-established image correlation methods allow for automated measurement displacements (optical radar) acquired at different dates. Although computationally expensive, nowadays relatively simple implement allows two-dimensional displacement measurements....
Table S1: Parameter values used for the SMB inversions.dH is uncertainty in rate of elevation change (standard deviation a normal distribution centred around 0), V surface velocity 0 SIA and F2019 modelling approaches), H ice thickness, S elevation.
Abstract. Local snow redistribution processes such as avalanches can considerably impact the spatial variability of accumulation on glaciers. However, this is particularly difficult to quantify with traditional surface mass balance measurements or geodetic observations. Here, we leverage high quality velocity and elevation change maps for period 2012–2021 from Pléiades stereo images, ice thickness Argentière Glacier (France) invert its distributed balance. This inversion conducted using...
Abstract. Local snow redistribution processes such as avalanches can considerably impact the spatial variability of accumulation on glaciers. However, this is difficult to quantify with traditional surface mass balance measurements or geodetic observations. Here, we leverage high-quality and high-resolution velocity elevation change maps for period 2012–2021 from Pléiades stereo images ice thickness Argentière Glacier (France) invert its distributed balance. Three inversions are conducted...
Avalanches are important contributors to the mass balance of glaciers located in mountain ranges with steep topographies. They result localized inputs that particularly difficult quantify, due difficulty access these avalanche cones field, and need account for ice dynamics when analyzing elevation change signals from digital models. Here, we aim quantify contribution Argenti&#232;re Glacier (Mont Blanc massif, French Alps) by inverting its distributed surface remote sensing products...
In the face of climate change and rising sea levels, "Submersion" is a strategic collaborative board game designed by H2020-PROTECT to deepen understanding foster proactive decision-making regarding risk coastal submersion. Tailored for high-school audience above, prompts players manage city, grappling with challenges posed marine The objective clear: safeguard city's future minimizing impact this risk. unfolds in Mer-Ville, picturesque town threatened climate-induced changes. Players,...
Ice velocity products with a sub-annual resolution are needed to better understand subglacial hydrology, glacier instabilities and response short-term events, such as calving or increased melt. Different processing chains now releasing scene-pair velocities worldwide (ITS_LIVE, GOLIVE, RETREAT, PROMICE, MEaSUREs, Millan et al., 2019). Their temporal is up 2 days their spatial sampling 50 m. However, analysing the variability of dynamics on global scale remains challenging. Indeed, amplitude...
The composition of clay minerals in soils, and more particularly the presence montmorillonite (as part smectite family), is a key factor soil swell–shrinking as well off–road vehicle mobility. Detecting these topsoil quantifying abundance are challenge since they usually intimately mixed with other minerals, organic carbon moisture content. Imaging spectroscopy coupled unmixing methods can address issues, but quality estimation degrades coarser spatial resolution due to pixel heterogeneity....
Abstract. We present the first analysis of glacier dynamics in tropical Andes Peru and Bolivia using satellite data from 2013 to 2022. Despite challenges posed by small-size glacier, low velocities high cloudiness during monsoon, we map annually aggregated surface quantify seasonal variability fastest parts glaciers. Limited trends are observed on annual over last decade, but significant changes between wet dry seasons found, likely controlled seasonality melt water production related...
Mineralogical clays are intimately mixed in soils. Until now, there is not a clear view on which unmixing methods the most effective case of intimate mixtures with both and other mineral. A laboratory approach proposed order to compare existing linear nonlinear approaches terms performances. Laboratory images pure Montmorillonite, Illite Kaolinite were preprocessed using 6 transformations commonly used literature (SNV, CR, CWT, Hapke, 1 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...
SPOT and Pléiades images acquired since 2002 are used to describe velocity elevation changes on Astrolabe Glacier, East Antarctica. Multi-temporal pairs of generate fields by automatically tracking surfaces features. Stereo-pairs create DEMs. Using three DEMs (2003, 2007 2013), we a surprising surface increase 2002, that reached mean rate 1.8 m/yr between 2003 2007. Conversely, the did not reveal any major change in so origin strong remains non elucidated
Save the glaciers! is an educational escape kit designed for teenagers (11-18 years old) to learn what glaciers are, how they move, react climate change and people can do slow down their melt.We made two versions of game: a physical version online version. In both players have sequentially solve 4 enigmas unlock next enigma until reach end game. Each make player discover understand following processes: Melting mountains contributes sea level rise Anatomy mass-balance mountain glacier: What...
Les glaciers du Val Veny (versant italien massif Mont-Blanc) ont fait l'objet de nombreuses observations terrain au cours des dernières décennies, notamment pour l'étude fluctuations glaciaires ou processus surface liés à la couverture débris. Nous proposons ici d'examiner comment les satellitaires peuvent compléter mesures sur l’état et le devenir Veny. En effet, produits obtenus manière quasi systématique permettent rendre compte, non seulement perte volume, mais aussi changements dans...