A5005512777- Geology and Paleoclimatology Research
- Geological formations and processes
- Cryospheric studies and observations
- Pleistocene-Era Hominins and Archaeology
- Advanced ceramic materials synthesis
- Isotope Analysis in Ecology
- earthquake and tectonic studies
- Environmental and Cultural Studies in Latin America and Beyond
- Methane Hydrates and Related Phenomena
- Geological and Geochemical Analysis
- Hydrocarbon exploration and reservoir analysis
- Archaeology and ancient environmental studies
- Aeolian processes and effects
- European history and politics
- Climate change and permafrost
- Landslides and related hazards
- Paleontology and Stratigraphy of Fossils
- Geological and Tectonic Studies in Latin America
- Geochemistry and Geologic Mapping
- Marine and environmental studies
- Marine and coastal ecosystems
- Geomagnetism and Paleomagnetism Studies
- Aluminum Alloys Composites Properties
- Advanced materials and composites
- Fiber-reinforced polymer composites
Ghent University
2016-2025
Geosciences Paris-Saclay
2023-2025
Université Paris-Saclay
2023-2024
Ghent University Hospital
2021
Woods Hole Oceanographic Institution
2007-2017
Deutsches Historisches Institut Paris
2004-2012
Institut d'Histoire de l'Amérique Française
2004-2012
Deutscher Bundestag
2012
Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
2010-2012
Brunel University of London
2005-2011
A comprehensive database of paleoclimate records is needed to place recent warming into the longer-term context natural climate variability. We present a global compilation quality-controlled, published, temperature-sensitive proxy extending back 12,000 years through Holocene. Data were compiled from 679 sites where time series cover at least 4000 years, are resolved sub-millennial scale (median spacing 400 or finer) and have one age control point every 3000 with cut-off values slackened in...
In recent decades, the land-ocean aquatic continuum, commonly defined as interface, or transition zone, between terrestrial ecosystems and open ocean, has undergone dramatic changes. On-going work stressed importance of treating Aquatic Critical Zones (ACZs) a sensitive system needing intensive investigation. Here, we discuss fjords an ACZ in context sedimentological, geochemical, climatic impacts. These diverse physical features are key controlling sources, transport, burial organic matter...
Well-characterised tephra horizons deposited in various sedimentary environments provide a means of synchronising archives. The use as chronological tool is however still widely underutilised southern Chile and Argentina. In this study we develop postglacial tephrochronological model for the Chilean Lake District (ca. 38 to 42°S) by integrating terrestrial lacustrine records. Tephra deposits preserved lake sediments record discrete events even if they do not correspond primary fallout. By...
Tephras preserved in lake sediments are commonly used to synchronize sedimentary archives of climate and environmental change correlate them with terrestrial environments.They also provide opportunities reconstruct volcanic explosive activity, e.g., eruption frequency tephra dispersal.Although processes may affect the record tephras lakes, generally considered as one best stratigraphy.The 2011-2012 Cordón Caulle volcano (Chile, 40°S) offered an ideal opportunity study affecting deposition...
Abstract The progress of science is tied to the standardization measurements, instruments, and data. This especially true in Big Data age, where analyzing large data volumes critically hinges on being standardized. Accordingly, lack community‐sanctioned standards paleoclimatology has largely precluded benefits advances field. Building upon recent efforts standardize format terminology paleoclimate data, this article describes Paleoclimate Community reporTing Standard (PaCTS), a crowdsourced...
Abstract Fjords are increasingly recognized as hotspots for organic carbon (OC) burial. The OC buried in fjords is of both marine and terrestrial origin, with a predominance worldwide. proportions traditionally calculated using end‐member modeling based on δ 13 C and/or N/C. However, characterizing the remains challenge, authors inconsistently measurements obtained land plants, soils, river sediments. Here, we analyzed TOC, C, N/C composition soil samples, suspended sediments, bulk...
SiC/SiC minicomposites that comprise different pyrocarbon/silicon carbide ((PyC/SiC) n ) multilayered interphases and a tow of SiC fibers (Hi‐Nicalon) have been prepared via pressure‐pulsed chemical vapor infiltration. Pyrocarbon were deposited from propane CH 3 SiCl /H 2 mixture, respectively. The microstructure the has investigated using transmission electron microscopy. mechanical tensile behavior at room temperature exhibits classical features tough composites, regardless characteristics...
Abstract A high-resolution multi-proxy study including the elemental and isotopic composition of bulk organic matter, land plant-derived biomarkers, alkenone-based sea-surface temperature (SST) from a marine sedimentary record obtained Jacaf Fjord in northern Chilean Patagonia (∼44°20′S) provided detailed reconstruction continental runoff, precipitation, summer SST spanning last 1750 yr. We observed two different regimes climate variability our record: relatively dry/warm period before 900...
Abstract According to paleoseismological studies, the last earthquake that ruptured Main Frontal Thrust in western Nepal occurred 1505 AD. No evidence of large earthquakes has been documented since, giving rise concept a seismic gap central Himalaya. Here, we report on new record earthquake-triggered turbidites from Lake Rara, Nepal. Our lake-sediment contains eight possibly moderate-to-large during 800 years, three which overlap age with previously reported M w ≥ 7 events Shaking intensity...
Hi‐Nicalon fiber‐reinforced silicon carbide matrix minicomposites (Hi‐Nicalon/SiC) with nanoscale multilayered (PyC/SiC) n fiber coatings (also referred to as interphases) have been manufactured via pressure pulse chemical vapor infiltration (P‐CVI). Fiber/coating interfaces were strengthened by using treated fibers. The microstructures of the interphases well propagation and deflection cracks in interfacial region investigated SEM TEM. Interfacial shear stress was estimated various methods...
Abstract Short-term climate changes in Southern Chile are investigated by a multi-proxy analysis of 53-cm-long sedimentary sequence selected among eight short cores retrieved Lago Puyehue (Chile, 40°S). This core contains 600-yr-long undisturbed record paleo-precipitation changes. Two measurement methods for sediment density, organic matter and biogenic silica contents compared the most appropriate techniques selected. Together with aluminium titanium concentrations, grain size geochemical...
Abstract. Glaciers are frequently used as indicators of climate change. However, the link between past glacier fluctuations and variability is still highly debated. Here, we investigate mid- to late-Holocene Gualas Glacier, one northernmost outlet glaciers Northern Patagonian Icefield, using a multi-proxy sedimentological geochemical analysis 15 m long fjord sediment core from Golfo Elefantes, Chile, historical documents early Spanish explorers. Our results show that can be sub-divided into...