A5042977118- earthquake and tectonic studies
- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- Atomic and Molecular Physics
- Hydrocarbon exploration and reservoir analysis
- Laser-induced spectroscopy and plasma
- Meteorological Phenomena and Simulations
- Geophysics and Gravity Measurements
- Precipitation Measurement and Analysis
- Climate variability and models
- Ion-surface interactions and analysis
- Laser-Matter Interactions and Applications
- Atmospheric and Environmental Gas Dynamics
- Geological and Geophysical Studies
- Geological Studies and Exploration
- Magnetic and transport properties of perovskites and related materials
- Soil Moisture and Remote Sensing
- Geological and Geophysical Studies Worldwide
- Particle accelerators and beam dynamics
- Seismic Imaging and Inversion Techniques
- Laser-Plasma Interactions and Diagnostics
- Climate change and permafrost
- Geochemistry and Geologic Mapping
- Hydrology and Watershed Management Studies
- Reservoir Engineering and Simulation Methods
Sorbonne Université
2009-2024
Centre National de la Recherche Scientifique
2015-2024
Université Paris Cité
2005-2024
Institut de physique du globe de Paris
2019-2024
Institut des NanoSciences de Paris
2007-2024
Sorbonne Paris Cité
2022-2023
University of Delaware
2018-2021
Institut des Sciences de la Terre
2015-2020
Université Gustave Eiffel
2015-2020
Université Savoie Mont Blanc
2016-2020
Land surface waters play a primary role in the global water cycle and climate. As consequence, there is widespread demand for accurate long‐term quantitative observations of their distribution over whole globe. This study presents first data set that quantifies monthly extent at ∼25 km sampling intervals 12 years (1993–2004). These estimates, generated from complementary multiple‐satellite observations, including passive (Special Sensor Microwave Imager) active (ERS scatterometer) microwaves...
We developed a remote sensing approach based on multi‐satellite observations, which provides an unprecedented estimate of monthly distribution and area land‐surface open water over the whole globe. Results for 1993 to 2007 exhibit large seasonal inter‐annual variability inundation extent with overall decline in global average maximum inundated 6% during fifteen‐year period, primarily tropical subtropical South America Asia. The largest declines are found where increases population have...
Abstract Water plays an important role in geological processes. Providing constraints on what may influence the distribution of aqueous fluids is thus crucial to understanding how water impacts Earth’s geodynamics. Here we demonstrate that ductile flow exerts a dynamic control water-rich fluid circulation mantle shear zones. Based amphibole and using dislocation slip-systems as proxy for syn-tectonic content olivine, highlight accumulation around fine-grained layers dominated by...
Abstract. Two atmospheric inversions (one fine-resolved and one process-discriminating) a process-based model for land surface exchanges are brought together to analyse the variations of methane emissions from 1990 2009. A focus is put on role natural wetlands years 2000–2006, period stable concentrations. From 2000, top-down bottom-up visions agree time-phasing global total wetland emission anomalies. The process-discriminating inversion indicates that dominate time-variability (90%...
Research Article| March 01, 2017 The origin of contractional structures in extensional gneiss domes P.F. Rey; Rey 1School Geosciences, University Sydney, NSW 2006, Australia Search for other works by this author on: GSW Google Scholar L. Mondy; Mondy G. Duclaux; Duclaux 2Department Earth Science, Bergen, Bergen 5007, Norway C. Teyssier; Teyssier 3Department Sciences, Minnesota, Minneapolis, Minnesota 55455, USA D.L. Whitney; Whitney M. Bocher; Bocher 4Laboratoire de Géologie Lyon, Université...
In natural shear zones, micro-porosity is found to decorate the grain boundaries of rocks which have been deformed in viscous conditions. Whether porosity formed during or after deformation widely debated, and requires further investigation test how micro-pores may be produced, particularly monomineralic aggregates.Using a new-generation Griggs-type apparatus, we performed two general experiments using fine grained (∼ 3 μm) quartzite (white novaculite) with low no primary...
Tibetan Plateau is resulted from the collision between India and Eurasia ca 55 Ma. The fate of subducted Indian crust has long been debated. Hi-CLIMB seismic experiment (Nábělek et al., 2009) presented images indicating that southern was under-thrusted by plate up to ~31°N, partially decoupled mantle below. However, structure dynamics underlying remain enigmatic. Various geodynamic models have proposed explain behavior lithosphere across this zone. These include...
Strain localization and softening in metastable crustal rocks involve complex feedbacks between deformation mechanisms, metamorphic reactions fluid circulation, as long pointed out for shear zones by previous authors. These feedbacks, however, have rarely been scrutinized documented precisely at grain-scale. Furthermore, while recent studies shown that high-grade (T°C>550°C) deform through a combination of dislocation creep (DC), diffusion dissolution-precipitation...
Micro-scale porosity is a feature commonly found in viscously deformed quartz-rich mylonites. However, the processes which may form such are actively debated, and whether or not pores formed syn-kinematically to shear zone activity remains uncertain. Yet, production of micro-pores during rock deformation have several critical implications, as affecting strength, possibly through brittle-ductile transition, and/or providing fluid pathways active zones.In this study we focus on bands produced...
Knowledge of the detailed evolution whole charge-state distribution projectile ions colliding with targets is required in several fields research such as material science and atomic nuclear physics but also accelerator physics, particular regard to foreseen large-scale facilities. However, there a lack data for collisions nonperturbative energy domain that involve many-electron projectiles. Starting from etacha model we developed [Rozet et al., Nucl. Instrum. Methods Phys. Res., Sect. B 107,...
Abstract An algorithm has been developed that employs neural network technology to retrieve soil moisture from multi‐wavelength satellite observations (active/passive microwave, infrared, and visible). This represents the first step in development of a methodology aiming combine beneficial aspects existing retrieval schemes. Several quality metrics have assess performance product on different spatial temporal scales. Additionally, an innovative approach estimate uncertainty proposed....
Abstract. Wetlands are a major emission source of methane (CH4) globally. In this study, we evaluate wetland estimates derived using the UK community land surface model (JULES, Joint Land Earth Simulator) against atmospheric observations methane, including, for first time, total columns from SCIAMACHY instrument on board ENVISAT satellite. Two JULES investigated: (a) an offline run driven with Climatic Research Unit–National Centers Environmental Prediction (CRU-NCEP) meteorological data and...
The basal mantle of the Semail ophiolite directly overlying metamorphic sole has been affected by a late and relatively low temperature ductile deformation event, ascribed to just above plate interface during subduction infancy (which ultimately led obduction). We show that this results in formation proto-mylonitic (∼850–750°C) ultra-mylonitic (∼750–650°C) shear zones wrapping lenses porphyroclastic tectonites deformed at higher (∼1200°C). In proto- ultra-mylonites, syn-deformation hydrous...
Abstract. This study sheds light on the deformation mechanisms of subducted mafic rocks metamorphosed at amphibolite and granulite facies conditions their importance for strain accommodation localization top slab during subduction infancy. These rocks, namely metamorphic soles, are oceanic slivers stripped from downgoing accreted below upper plate mantle wedge first million years intraoceanic subduction, when interface is still warm. Their formation intense (i.e., shear ≥5) attest to a...
A methodology to retrieve soil moisture (SM) from multiinstrument remote sensing data is presented. The method uses a Neural Network (NN) find the statistical relationship linking input reference SM dataset. composed of passive microwaves (L-band SMOS brightness temperatures), active (C-band ASCAT backscattering coefficients), and visible infrared observations by MODIS. used train NN are ECMWF model predictions or L3 SM. After determining best configuration using NN, product evaluated with...
Abstract This study reports on feedback mechanisms between fluid migration, ductile deformation, and strain localization processes in an incipiently forming mantle wedge: the basal banded unit of Semail ophiolite. These peridotites were located right above plate interface during intraoceanic subduction infancy that ultimately led to ophiolite obduction. During this stage, they affected by coeval (proto)mylonites at ~900–800 °C ultramylonites ~700 °C, interaction with fluids. From...