A5011177078- Geology and Paleoclimatology Research
- Groundwater and Isotope Geochemistry
- Hydrocarbon exploration and reservoir analysis
- Groundwater flow and contamination studies
- Geological and Geophysical Studies
- Methane Hydrates and Related Phenomena
- Geochemistry and Elemental Analysis
- Geological Studies and Exploration
- Isotope Analysis in Ecology
- Hydrology and Watershed Management Studies
- Pleistocene-Era Hominins and Archaeology
- Geological formations and processes
- Clay minerals and soil interactions
- earthquake and tectonic studies
- Radioactive contamination and transfer
- Seismology and Earthquake Studies
- African Botany and Ecology Studies
- Astro and Planetary Science
- Radioactive element chemistry and processing
- Marine and environmental studies
- Geophysical and Geoelectrical Methods
- Geophysical Methods and Applications
- Paleontology and Stratigraphy of Fossils
Université Paris Cité
2019-2024
Institut de physique du globe de Paris
2019-2024
Centre National de la Recherche Scientifique
2019-2024
Sorbonne Paris Cité
2021-2024
Federal Office for Radiation Protection
2024
GFZ Helmholtz Centre for Geosciences
2021
Freie Universität Berlin
2017
Abstract The Central Asian Pamir Mountains (Pamirs) are a high‐altitude region sensitive to climatic change, with only few paleoclimatic records available. To examine the glacial‐interglacial hydrological changes in region, we analyzed geochemical parameters of 31‐kyr record from Lake Karakul and performed set experiments climate models interpret results. δD values terrestrial biomarkers showed insolation‐driven trends reflecting major shifts water vapor sources. For aquatic biomarkers,...
The stable isotopes of lithium (Li) serve as a robust proxy silicate weathering. fate and transport these in the dissolved load major rivers have been characterized to infer changes both contemporary weathering regimes paleo-conditions. In this contribution, we deconvolve integrated signal into individual processes that fractionate Li at inception by directly measuring isotope ratios waters (δ7Li) transiting through rapidly eroding first-order hillslope. We use data develop multicomponent...
Abstract Lithium isotope ratios (δ 7 Li) of rivers are increasingly serving as a diagnostic the balance between chemical and physical weathering contributions to overall landscape denudation rates. Here, we show that intermediate intensities highly enriched stream δ Li values typically associated with lowland floodplains can also describe small upland watersheds subject cool, wet climates. This behavior is revealed by +22.4 +23.5‰ within Critical Zone observatory located in Cévennes region...
Long-term relationships between stream chemistry and discharge are regulated by watershed subsurface structure biogeochemical functioning. The extent to which these mechanisms expressed may be explored in the geochemical response of streams during storm events remains an open question. Here, we monitor intense as it infiltrated upland hillslope draining into a small steep canyon that is typified chemostatic concentration-discharge rock-derived solutes. Our approach couples high-frequency...
The demand for large and reliable data sets on isotopic composition has increased in geochemistry environmental sciences over recent years. We present an automated ion chromatographic separation method using a robotic pipetting arm, termed ‘ ChemCobOne ’, to reduce sample time. Its performance was tested lithium isotope geological reference materials single‐step with HCl (0.2 mol l −1 ) 2 ml resin volume. This refined purification does not forfeit precision, accuracy or purity compared...
Comprehending and predicting the way humans affect Earth's Critical Zone remains a challenge. An understanding of past changes resulting from human non-human influences in dynamics is crucial. Here, we use retrospective approach to address this question based on new lithium (Li) isotope record Late Glacial Period present pre-Alpine lake sediment sequence (Lake La Thuile, France). Coupled with archive, investigation present-day soils catchment suggests that sediments are not necessarily...