A5035683896- Planetary Science and Exploration
- Astro and Planetary Science
- Space Exploration and Technology
- Aeolian processes and effects
- Methane Hydrates and Related Phenomena
- Geology and Paleoclimatology Research
- Isotope Analysis in Ecology
- Landslides and related hazards
- Scientific Research and Discoveries
- Spacecraft and Cryogenic Technologies
- Winter Sports Injuries and Performance
- Cryospheric studies and observations
- Atmospheric Ozone and Climate
- Medical Imaging Techniques and Applications
- Space Science and Extraterrestrial Life
- Radiopharmaceutical Chemistry and Applications
- Marine and environmental studies
- Nuclear Physics and Applications
- Radioactive Decay and Measurement Techniques
- High-pressure geophysics and materials
- Radioactive contamination and transfer
- earthquake and tectonic studies
- Space Satellite Systems and Control
- Astrophysics and Star Formation Studies
- Spaceflight effects on biology
Science et Ingénierie des Matériaux et Procédés
2024
Institut des Géosciences de l'Environnement
2023-2024
Université Grenoble Alpes
2021-2024
Centre National de la Recherche Scientifique
2014-2024
Institut polytechnique de Grenoble
2023-2024
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2023-2024
Météo-France
2021-2024
Institut de Recherche pour le Développement
2023-2024
University of Bern
2017-2023
Laboratoire de Planétologie et Géosciences
2014-2022
Abstract On Mars, locally warm surface temperatures (~293 K) occur, leading to the possibility of (transient) liquid water on surface. However, exposed martian atmosphere will boil, and sediment transport capacity such unstable is not well understood. Here, we present laboratory studies a newly recognized mechanism: “levitation” saturated bodies cushion vapor released by boiling. Sediment where this mechanism active about nine times greater than without effect, reducing amount required...
We have used the latest available shape model for gas and dust simulations of inner coma comet 67P/Churyumov-Gerasimenko period around May 2015 (equinox). compare results from a purely insolation-driven with complementary set observations made by ROSINA, VIRTIS, MIRO, OSIRIS within same period. The include - first time inverted MIRO measurements density, temperature bulk velocity to constrain model. comparisons show that, as in November 2014 (Marschall et al., 2016), activity does not...
Abstract Gullies are widespread morphological features on Mars for which current changes have been observed. Liquid water has one of the potential mechanisms to explain their formation and activity. However, under present-day Martian conditions, liquid is unstable should only be transiently present in small amounts at surface. Yet little attention paid by transports sediment low atmospheric pressure. Here we results laboratory experiments studying interaction between flowing over a sand bed...
Abstract Mars Polar Science is a subfield of science that encompasses all studies the cryosphere and its interaction with Martian environment. Every 4 yr, community scientists dedicated to this meets discuss new findings debate open issues in International Conference on Exploration (ICMPSE). This paper summarizes proceedings seventh ICMPSE progress made since sixth edition. We highlight most important advances present salient questions field today, as discussed agreed upon by participants...
Abstract. Snow is a complex porous material presenting variety of microstructural patterns. This microstructure largely controls the mechanical properties snow, although relation between micro and macro remains to be better understood. Recent developments based on discrete element method (DEM) three-dimensional microtomographic data make it possible reproduce numerically brittle behaviour snow. However, these lack experimental evaluation so far. In this study, we evaluate DEM numerical model...
Strong heterogeneities in the composition of volatile species have been detected coma comet 67P/Churyumov-Gerasimenko (67P/C-G) by ROSINA instrument onboard ESA's Rosetta spacecraft. However, it is not clear if these are indicative near-surface nucleus or mainly insolation-driven. In order to clarify link between and we performed numerical simulations compare our results with measurements acquired ROSINA/DFMS for three major namely, H2O, CO2, CO. We use a previously published thermo-physical...
Aims. The aim of this work is to investigate the parameters influencing generation inner comae a comet with spherical nucleus and model gas activity distribution around its nuclei. Here, we influence thermal conductivity combined sub-surface H 2 O CO -ice sources on insolation-driven sublimation resulting flow field. In process, adopted some rotational surface properties target Rosetta mission, 67P/Churyumov-Gerasimenko (67P/CG). Methods. We used simplified heat transport through layer...
Abstract. Snow is a complex porous material presenting various microstructural patterns. This microstructure controls the mechanical properties of snow, and this control still needs to be better understood. Recent numerical developments based on three-dimensional tomographic data have provided new insights into snow behaviour. In particular, discrete element method combined with captured by tomography ice has been used reproduce brittle snow. However, these lack experimental evaluation so...
. IntroductionIn 2008, the High Resolution Imaging Science Experiment (HiRISE) on board NASA’s MRO fortuitously captured several discrete clouds of material (Fig.1) in process cascading down a steep scarp water-ice-rich north polar layered deposits (NPLD). The events were only seen during period ~4 weeks, near onset northern spring, when seasonal cover CO2 is beginning to sublimate from regions. Russell et al. [1] analyzed morphology clouds, inferring that particles involved...
During the martian year surface temperatures in winter dip below condensation temperature of carbon dioxide and it freezes onto surface. In spring, sublimates directly back into atmosphere observations reveal that this cycle condensation-sublimation results identifiable sediment transport on We use data from Colour Stereo Surface Imaging System (CaSSIS) ESA's Exomars Trace Gas Orbiter to illustrate range landforms thought be created by these sublimation processes. Previous experiments have...