Influence of the energy input on the vapor flux and on the temperature distribution of planetary ices

Details Influence of the energy input on the vapor flux and on the temperature distribution of planetary ices Influence of the energy input on the vapor flux and on the temperature distribution of planetary ices

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja....10762b&link_type=abstract

EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #10762

Physics

Scientific paper

One major goal of our research is to determine the chemical composition and structure of the planetary surface ices. Unfortunately, there are only very few direct observations of comet nuclei, polar caps of planetary bodies, icy moons, etc.
Thermal evolution models can be used to predict local properties such as gas and dust emission, temperatures, local stratigraphy, presence or absence of a refractory crust. The sublimation of water ice from the surface and the release of minor gases from ices inside of a porous ice surface strongly depend on the effective energy input. Therefore, understanding the power balance at the surface of the planetary body is essential to study the chemical and physical evolution of planetary ices.
We report on a detailed energy budget analysis for some comets, the ice caps on Mars and Mercury in order to investigate the structural behavior of the body for a variety of parameters and assumptions. Measurements of molecule fluxes, temperatures and thermal inertia will be related to available energies and we try to provide hints about the evolutionary status of the investigated surfaces. We will try also to predict the energy distribution in the surfaces both at global and local scale, clarifying what are the model limitations and relevant parameters.

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