A5061570713- Cryospheric studies and observations
- Climate change and permafrost
- Arctic and Antarctic ice dynamics
- Winter Sports Injuries and Performance
- Landslides and related hazards
- Geology and Paleoclimatology Research
- Climate variability and models
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Geophysics and Gravity Measurements
- Hydrology and Watershed Management Studies
- Clinical Nutrition and Gastroenterology
- Image and Object Detection Techniques
- Geochemistry and Geologic Mapping
- Healthcare Systems and Challenges
- Reservoir Engineering and Simulation Methods
- Geophysical and Geoelectrical Methods
- 3D Surveying and Cultural Heritage
- Planetary Science and Exploration
- Geological and Tectonic Studies in Latin America
- Environmental and Cultural Studies in Latin America and Beyond
- Image Processing and 3D Reconstruction
- Geological and Geophysical Studies
University of Zurich
2020-2025
University of Bern
2023
World Glacier Monitoring Service
2022
Laboratoire d’Études en Géophysique et Océanographie Spatiales
2018-2021
Institut de Recherche pour le Développement
2018-2021
Centre National de la Recherche Scientifique
2018-2021
Université de Toulouse
2018-2021
Université Toulouse III - Paul Sabatier
2018-2021
Institut des Géosciences de l'Environnement
2018-2020
Université Grenoble Alpes
2018-2020
Abstract Glaciers are indicators of ongoing anthropogenic climate change 1 . Their melting leads to increased local geohazards 2 , and impacts marine 3 terrestrial 4,5 ecosystems, regional freshwater resources 6 both global water energy cycles 7,8 Together with the Greenland Antarctic ice sheets, glaciers essential drivers present 9,10 future 11–13 sea-level rise. Previous assessments glacier mass changes have been hampered by spatial temporal limitations heterogeneity existing data series...
Abstract Modeling the short‐term (<50 years) evolution of glaciers is difficult because issues related to model initialization and data assimilation. However, this timescale critical, particularly for water resources, natural hazards, ecology. Using a unique record satellite remote‐sensing data, combined with novel optimisation surface‐forcing‐calculation method within framework deep‐learning‐based Instructed Glacier Model, we are able ameliorate issues. We thus committed all in European...
We compare two independent estimates of the rate elevation change and geodetic mass balance Northern Patagonian Icefield (NPI) between 2000 (3856 km²) 2012 (3740 from space-borne data. The first is obtained by differencing Shuttle Radar Topography Mission (SRTM) digital model (DEM) February a Satellite pour l'Observation de la Terre 5 (SPOT5) DEM March 2012. second deduced fitting pixel-based linear trends over 118 DEMs calculated Advanced Spaceborne Thermal Emission Reflection Radiometer...
Abstract Digital elevation models (DEMs) from the spaceborne interferometric radar mission TanDEM-X hold a large potential for glacier change assessments. However, bias is potentially introduced through penetration of X-band signal into snow and firn. To improve our understanding on glaciers, we compare DEMs derived almost synchronous acquisition Pléiades optical stereo-images Grosser Aletschgletscher in March 2021. We found that – averaged per bin can reach up to 4–8 m accumulation area,...
Abstract The current Chilean megadrought has led to acute water shortages in central Chile since 2010. Glaciers have provided vital fresh the region's rivers, but quantity, timing and sustainability of that provision remain unclear. Here we combine in‐situ, remote sensing climate reanalysis data show from 2010 2018 during megadrought, unsustainable imbalance ablation glaciers (ablation not balanced by new snowfall) strongly buffered late‐summer discharge Maipo River, a primary source...
Abstract. Observations of glacier mass changes are key to understanding the response glaciers climate change and related impacts, such as regional runoff, ecosystem changes, global sea level rise. Spaceborne optical radar sensors make it possible quantify elevation thus multi-annual on a scale. However, estimates from growing number studies show wide range results with differences often beyond uncertainty bounds. Here, we present outcome community-based inter-comparison experiment using...
Mountain glaciers are a major source of sea-level rise and also represent an important freshwater resource in many mountainous regions. Thus, accurate estimations their thickness and, therefore, the total ice volume both predicting mitigating global local effects climate change. However, to date, only 2% world&#8217;s outside sheets have any observations, due logistical difficulties obtaining such measurements, creating large policy-relevant scientific gap.&#160;The recent...
Glacier retreat and the transition from land to lake termini can accelerate mass loss through various feedback mechanisms. This study examines dynamic changes during land-to-lake of four neighboring glaciers (Exploradores, Grosse, Reichter Gualas) located in maritime-humid climate western Northern Patagonian Icefields, where ablation rates on glacier terminal tongues reach up 20 m w.e. annually.We conducted first bathymetric surveys glacier&#8217;s proglacial lakes integrated data ice...
Trend determination for earth surface processes requires long and continuous certain measurements, but long-term records of landscape change are often limited in temporal spatial extent. Scanned historical aerial imagery serve as a valuable resource to derive data products like digital elevation models (DEMs) document the state Earth's calculate trends different e.g. glacier dynamics.Classic Structure-from-Motion (SfM) photogrammetry workflows have demonstrated capability automatically...
Meltwater from Andean glaciers sustains river flow heavily relied on by ecosystems and communities downstream, particularly during periods of drought. However, contemporary rates glacier recession in the Andes are accelerating yield freshwater high mountain environment here is forecast to decline coming decades, increasing water stress region. Water resource management policies rely robust hydrological modelling, which themselves require accurate, long-term records ice loss rates. Prior...
Based on the recently released National Glacier Inventory (NGI), we analyzed characteristics and mass balance rates of ice masses in Argentinean Central Andes (ca. 30°–37° S). The NGI provides unprecedented information area, number distribution different masses, including debris-covered glaciers rock glaciers. In Andes, a 8,076 were identified covering total area 1767 km 2 . For period 2000–2018, general lowering surface was observed with region-wide rate −0.18 ± 0.19 m w.e. yr −1 Clear...
ABSTRACT We simulate the ice dynamics of San Rafael Glacier (SRG) in Northern Patagonia Icefield (46.7°S, 73.5°W), using glacier geometry obtained by airborne gravity measurements. The full-Stokes flow model (Elmer/Ice) is initialized an inverse method to infer basal friction coefficient from a satellite-derived surface velocity mosaic. high velocities (7.6 km −1 ) near front are explained low shear stresses (<25 kPa). modelling results suggest that 98% due sliding fast-flowing tongue...
Abstract. Glaciers, distinct from the Greenland and Antarctic ice sheets, play a crucial role in Earth's climate system by affecting global sea levels, freshwater availability, nutrient energy budgets regional patterns. Accurate measurements of glacier mass changes are needed to understand project evolution its related impacts on system. Two methods allow measure at high spatial resolution. Remotely sensed surface elevation data provides volume change estimates over large glacierized regions...
Digital elevation models (DEMs) from the spaceborne interferometric radar mission TanDEM-X hold a large potential for glacier change assessments and monitoring. However, bias is potentially introduced through penetration of X-band signal into snow firn that can be substantial. The magnitude this has been analysed in some glaciarized regions world; still, knowledge about European Alps limited.In study, we investigated unique situation almost synchronous acquisition Pl&#233;iades DEMs over...
Abstract The Desert Andes contain >4500 ice masses, but only a handful are currently being monitored. We present the mass changes of small mountain glacier Agua Negra (1 km 2 ) and rest glaciers in Jáchal river basin. Remote-sensing data show lost 23% its area during 1959–2019. Glaciological measurements 2014–2021 indicate an average annual balance −0.52 m w.e. −1 , with mean winter summer balances 0.80 −1.33 respectively. Equilibrium Line Altitude (ELA) is estimated to be 5100 ± 100...
Glaciers play a fundamental role in the Earth&#8217;s water cycles. They are one of most important freshwater resources for societies and ecosystems recent increase ice melt contributes directly to rise ocean levels. For this reasons, they have been declared as an Essential Climate Variable (ECV) by Global Observing System (GCOS). Within Copernicus Change Services (C3S), global gridded annual glacier mass change dataset provides information on changing last five decades combining...
Glacier changes are a sign of climate change and have an impact on the local hazard situation, region runoff, global sea level. In previous reports Intergovernmental Panel Climate Change (IPCC), assessment glacier mass was hampered by spatial temporal limitations as well restricted comparability different observing methods. The Mass Balance Intercomparison Exercise (GlaMBIE; https://glambie.org) aims to overcome these challenges in community effort reconcile in-situ remotely sensed...
Mountain glaciers are a major source of sea-level rise and also represent an important freshwater resource in many mountainous regions. Thus, accurate estimations their thickness and, therefore, the total ice volume both predicting mitigating global local effects climate change. However, to date, only 2% world&#8217;s outside sheets have any observations, due logistical difficulties obtaining such measurements, creating large policy-relevant scientific gap. The recent development...
The first-ever field measurements conducted at the outlet glaciers Gualas and Reichert Northern Patagonian Ice Sheet, Chile, provide basis for this work. Both currently terminate in large (2 km resp. 9 length) proglacial lakes. have retreated rapidly over past four decades, whereby glacier by 100 m per year. Our bathymetry of these lakes make it possible to estimate mass loss assumptions about floatation during retreat. depths up 250 350 therefore volume previously occupied is significant....
The Global Gravity-based Groundwater Product (G3P) has evolved with a new version (V1.12), bringing substantial enhancements to our satellite-based groundwater storage anomaly dataset&#8212;a prototype for future product within the EU Copernicus Climate Change Service. as world's largest distributed freshwater storage, is vital resource human, industrial, and agricultural needs. Despite its significance, lacks service delivering operational, observation-based, globally comprehensive data...