A5022133802- Geology and Paleoclimatology Research
- Geological formations and processes
- earthquake and tectonic studies
- Landslides and related hazards
- Methane Hydrates and Related Phenomena
- Marine and environmental studies
- Hydrology and Sediment Transport Processes
- Pleistocene-Era Hominins and Archaeology
- Geological and Geochemical Analysis
- Soil erosion and sediment transport
- Geological Modeling and Analysis
- Geotechnical Engineering and Analysis
- Underwater Acoustics Research
- Flood Risk Assessment and Management
- Seismic Imaging and Inversion Techniques
- Cryospheric studies and observations
- Geological and Geophysical Studies
- Coastal wetland ecosystem dynamics
- Seismic Waves and Analysis
- Soil and Unsaturated Flow
- Geological and Geophysical Studies Worldwide
- Remote Sensing and LiDAR Applications
- Earthquake and Tsunami Effects
- Aquatic Ecosystems and Phytoplankton Dynamics
- Winter Sports Injuries and Performance
University of Bern
2011-2024
Oeschger Centre for Climate Change Research
2020-2024
ETH Zurich
2015-2024
University of Geneva
2012-2021
Geological Institute
2015
Ivanovo State University
2011
University of Göttingen
2010
Abstract The study of mass movements in lake sediments provides insights into past natural hazards at historic and prehistoric timescales. Sediments from the deep basin Lake Geneva reveal a succession six large‐scale (volumes 22 × 10 6 to 250 m 3 ) mass‐transport deposits, associated with five mass‐movement events within 2600 years (4000 cal bp 563 ad ). deposits result from: (i) lateral slope failures (mass‐transport deposit B 3895 ± 225 A C 3683 128 ); (ii) Rhône delta collapses D G dated...
Charles Darwin described in 1842 the island of Bora (Society Islands, Central South Pacific) as key example for a subsiding basaltic oceanic with related reef development. He recognized that lagoon developed between an outer barrier sand apron and inner fringing attached to shore volcanic island. In order quantify past sea-level paleoenvironmental changes subsidence, lagoonal sediments were cored 2024 context Bora2coring project. Previous shorter cores indicated Holocene are...
Abstract: Turbidites in lacustrine sediments are commonly used to assess the frequencies of flood events and/or earthquakes. Understanding origin those deposits is key adequately sources and triggers such large systems. Ca/Ti X-ray fluorescence core scanner magnetic susceptibility values on sediment cores deep basin Lake Geneva as a provenance indicator turbidites either from Dranse or Rhone deltas slopes not influenced by deltaic input. This tool validated mineralogical analyses (X-ray...
High-resolution seismic and sediment core data from the 'Grand Lac' basin of Lake Geneva reveal traces repeated slope instabilities with one main slide-evolved mass-flow (minimum volume 0.13 km3) that originated northern lateral lake near city Lausanne. Radiocarbon dating organic remains sampled top deposit gives an age interval 1865–1608 BC. This date coincides for a mass movement event described in 'Petit (1872–1622 BC). Because multiple movements took place at same time different parts...
Submarine landslides are major agents of sediment mass transfer from the shallow to deep sea. Due their rapid emplacement and tsunamigenic potential, such significant geohazards for society off- on-shore infrastructure. The relationship between climate change occurrence submarine is widely debated. However, there a lack continuous long-term landslide records with which comprehensively understand climate-driven forces occurrence. Here, using oxygen isotope stratigraphy in combination...
In aerodynamic levitation, solids and liquids are floated in a vertical gas stream. combination with CO2-laser heating, containerless melting at high temperature of oxides silicates is possible. We apply levitation to bulk rocks preparation for microchemical analyses, evaporation reduction experiments.Liquid silicate droplets (~2 mm) were maintained stable using nozzle 0.8 mm bore an opening angle 60°. The flow was ~250 ml min-1. Rock powders melted homogenized microchemcial analyses. Laser...
In the late 19th century, F.-A. Forel led investigations of Rhone River delta area Lake Geneva that resulted in discovery a textbook example river-fed system containing impressive subaquatic channels. Well ahead marine counterparts, scientific observations and interpretations water currents shaping edifice for first time documented how underflow carry cold, suspension-laden waters from river mouth all way to deep basin. These early laid basis follow-up studies 20th 21th centuries. Sediment...
Tsunamis occur not only in marine settings but also lacustrine environments. Most of the tsunamis are caused by seismically- or aseismically-triggered mass movements. Therefore, an assessment stability subaqueous slopes is crucial for tsunami hazard a lake. We selected Lake Lucerne (Switzerland) as natural laboratory to perform in-depth geotechnical characterization its slopes. This lake experienced documented 1601 and 1687. Some still bear sediment volumes with potential tsunamigenic...
Mass movements constitute major natural hazards in the Alpine realm. When triggered on slopes adjacent to lakes, these mass can generate tsunami-like waves that may cause additional damage along shore. For hazard assessment, knowledge about occurrence, trigger and geomechanical hydrogeological mechanisms of is necessary. reconstructing occurred or lakes's sedimentary record be used as an archive. Here, we present a prehistorical mass-movement event, which traces were found alpine lake, Lake...
Abstract Volcanic ash layers are important markers for the chronostratigraphy of paleoclimate and paleoenvironmental archives at southern tip South America. However, this requires that tephras well-dated. We report geochemical data from stalagmite MA1 formed in a non-karst cave near Mt. Burney volcano southernmost Patagonia (~53°S). High-resolution LA-ICP-MS analyses, SEM imagery, EPMA data, NanoSIMS enable to identify volcanogenic signals during last 4.5 kyrs sub-annual trace element...
Abstract Although lake tsunamis constitute a rare peril, they have repeatedly occurred in peri-alpine lakes the past. There are several documented historical examples of landslide-triggered Swiss lakes. However, fundamental information and workflows to rapidly quantify lacustrine tsunami hazard for multiple missing so far. The fact that shorelines major densely populated underlines need assessment. Detailed assessments require high-resolution geophysical, geotechnical sedimentological data,...
Non-invasive techniques such as seismic investigations and high-resolution multibeam sonars immensely improved our understanding of the geomorphology sediment regimes in both lacustrine marine domain. However, only few studies provide quantifications basin wide-sediment budgets lakes. Here, we use combination bathymetric mapping reflection data to quantify budget an alpine lake. The new Lake Brienz reveal three distinct geomorphological areas: slopes with intercalated terraces, a flat plain,...
Abstract The 1601 CE earthquake ( M w ca. 5.9) in “Unterwalden,” Central Switzerland, triggered multiple subaqueous mass movements and a subaerial rockfall that generated tsunami waves with run‐up heights of up to 4 m several hundred meters inundation along the coastal lowlands Lake Lucerne. In shallow Lucerne Bay, historical chronicles reported an oscillation water initial amplitude ∼1–2 period 10 min, which continued for days after event decreasing amplitude. Here, we investigate...