A5054987251- Geology and Paleoclimatology Research
- Methane Hydrates and Related Phenomena
- Paleontology and Stratigraphy of Fossils
- Astro and Planetary Science
- Geological formations and processes
- Geological and Geochemical Analysis
- Geomagnetism and Paleomagnetism Studies
- Hydrocarbon exploration and reservoir analysis
- Planetary Science and Exploration
- Geological and Geophysical Studies
- Astronomical Observations and Instrumentation
- Geochemistry and Geologic Mapping
- Geological Formations and Processes Exploration
- Geochemistry and Elemental Analysis
- Spacecraft and Cryogenic Technologies
- Offshore Engineering and Technologies
- Reservoir Engineering and Simulation Methods
- Seismic Imaging and Inversion Techniques
- Pleistocene-Era Hominins and Archaeology
- Solar and Space Plasma Dynamics
- Geophysics and Gravity Measurements
- Geological and Geophysical Studies Worldwide
- Geological Modeling and Analysis
- Time Series Analysis and Forecasting
- Astronomy and Astrophysical Research
Géosciences Rennes
2017-2025
Université de Rennes
2017-2025
Centre National de la Recherche Scientifique
2014-2024
Czech Academy of Sciences, Institute of Inorganic Chemistry
2017-2021
Czech Geological Survey
2017-2021
Palacký University Olomouc
2021
International Ocean Discovery Program
2019
University of Birmingham
2019
University of Bremen
2015-2019
Universidad Nacional Autónoma de México
2018
Measurements of several short‐lived photochemical species (e.g., OH, HO 2 , and CH O) were obtained from the DC‐8 P3‐B aircraft during NASA Transport Chemical Evolution over Pacific (TRACE‐P) campaign. To assess fast theory east Asian coast western Pacific, these measurements are compared to predictions using a time‐dependent box model constrained by coincident long‐lived tracers physical parameters. Both OH generally overpredicted throughout troposphere, which is different result previous...
Significance The Milankovitch cycles are orbitally paced variations in insolation that drove periodic climate changes on Earth at the scale of tens to hundreds thousands years. Longer ‟grand orbital cycles” also exist, but their impacts paleoclimate dynamics not well documented for pre-Cenozoic times. Here we tackle this issue by analyzing stable isotope fluctuations recorded fossil cephalopods throughout Jurassic–Early Cretaceous interval. We document a periodicity ∼9 My carbon cycle,...
Abstract. Spectral analysis is a key tool for identifying periodic patterns in sedimentary sequences, including astronomically related orbital signals. While most spectral methods require equally spaced samples, this condition rarely achieved either the field or when sampling sediment core. Here, we propose method to assess impact of uncertainty error made measurement sample stratigraphic position on resulting power spectra. We apply Monte Carlo procedure randomise steps depth series using...
Abstract The Early Cretaceous Weissert event, characterized by a positive carbon isotope excursion and coincident with the Paraná‐Etendeka volcanism, saw biogeochemical chain of events that ultimately led to an increase in burial. A conclusive link between volcanism its impact upon environment remains, however, elusive. Here we reconstruct temperature through event from Mg/Ca ratios belemnites Vocontian Trough (France) SE Spain use isotopes our reconstruction marine records cycling. We...
The Poigny borehole near Provins (Seine-et-Marne) provides the most complete single pristine section through Upper Cretaceous Chalk of Paris Basin. A well preserved and diverse palynoflora including 236 species subspecies organic-walled dinoflagellate cysts (dinocysts) is documented from borehole, together with a high-resolution carbon-isotope curve (δ 13 C carb ) for Coniacian–Campanian interval. Integration palynological δ data basis chemostratigraphic biostratigraphic correlation to...
The Mesozoic was punctuated by several Oceanic Anoxic Events (OAE) characterised widespread black shale deposition and global carbon cycle perturbations. Among them, the OAE2 spanning Cenomanian-Turonian boundary (~ 94 Ma), has been identified as one of most severe OAE Mesozoic. is a > 2‰ positive isotope excursion (CIE) recorded in both inorganic organic sedimentary material. This CIE interpreted massive burial 13C-depeleted driven decrease seafloor oxygenation. Previous models...
After the climatic and environmental context of hominin evolution in East Africa centred spotlight for decades, West gains increasing interest considering a pan-African early human history. However, long continuous continental climate records from this area illuminating regional hydroclimatic impacts differences across are missing. This is major shortcoming as fundamental offsets W-E hydroclimates expectable that may have influenced dispersal. Here we present million-year-old hydroclimate...
The Pliensbachian-Toarcian transition has been studied in depth for the major environmental changes and marine invertebrate biodiversity crisis observed at that time.Despite a large number of studies performed, time frames provided this interval show discrepancies from author to author.Major occurring impacted sedimentation pattern rates, making uncertain construction scales.Here, we provide new astrochronological framework based on an expanded hemipelagic section Central High Atlas Basin...
Abstract International Ocean Discovery Program Expedition 369 drilled four sites on the southwestern Australian continental margin, in deep water Mentelle Basin (MB) and neighboring Naturaliste Plateau (NP). The drillsites are located crust that continued rifting after seafloor spreading began further north Perth Abyssal Plain (PAP) between magnetochrons M11r M11n (133–132 Ma), ending when west of NP chrons M5n M3n (126–124 Ma). Drilling recovered first situ samples basalt flows overlying...