- Names
-
- F. Grisolle
- Title
- Hydratation minérale à la surface de mars : Caractérisation spectroscopique, thermodynamique et application a la télédétection
- Abstract
- The current climate of Mars causes the formation of seasonal condensates on the surface of high-latitude regions during the polar night. This layer sublimates when exposed to sun in spring. Spatial instruments have enabled to study the spatial and temporal evolution and thermodynamic properties of ther -mainly deposits. The aim of this thesis is to supplement this research by laboratory experimentation in order to improve the knowledge of the condensates properties and microphysical process. An experimental set-up, CarboNIR, has been conceived to manipulate analogous ices in controlled environment. The experiments on , at equilibrium or nonequilibrium, create various grainsize (from about ten microns to several millimeters) and porosity (from 0 to 50% approximately) condensates. The corresponding near-infrared reflectance spectra show specific differences. Compact slab ices, transluscent or with highly transparency, can be formed by thermal metamorphism of porous snow or by direct condensation of gas. Thermal fluxes balance in the system highlights heat fluxes supplied by the set-up to the sample and the sublimation-condensation process ocurring in it, with matter and energy transfers through the porosity. Thermal and pressure constraints on the ice samples enable to determine the evolution according to of specific parameters, and therefore to comprehend the seasonal condensates microphysic evolution associated with local thermal conditions on Mars polar regions. Accuracy of radiative transfer models and GCM, as well as interpretation of Martian monitoring data will be improved by the confrontation with the experimental results.
- Keywords
- spectroscopy, thermodynamics, sample cell, spectro-gonio radiometer, bidirectional reflection, radiative transfer simulation, bidirectional reflectance spectra, visible, near-IR, thermal process, fluid process, condensation, sublimation, kinetic, grain size, molecular solid, ice, snow, CO2, Mars, surface
- Content
- instrument-technique, sample, material-matter, spectral data, thermodynamic data, planetary sciences
- Document type
- phd thesis
- Year
- 2013
- Pages
- 1 - 216
- Pages number
- 216
- Editor
- IPAG
- Publisher
- Université Joseph Fourier
- Publisher city
- Grenoble, France
- Publication state
- published
- Comments
- PhD defence: 20 December 2013
- Identifiers
- File
- Grisolle-Florence-2013-PhD-UGA.pdf
- Publications
-
- Appere et al., 2011, J. Geophys. Res. E, 116, E05001
- Appéré, 2013, 1 - 354
- Bonnefoy et al., 2000, Rem. Sens. Rev., 19, 59 - 74
- Bonnefoy, 2001, 1 - 328
- Brissaud et al., 2004, Appl. Opt., 43, 1926 - 1937
- Doute, 1998, 1 - 280
- Grundy and Schmitt, 1998, J. Geophys. Res. E, 103, 25809 - 25822
- Pommerol, 2009, 1 - 254
- Quirico and Schmitt, 1997, Icarus, 127, 354 - 378
- Schmitt et al., 1998, 227, 199 - 240