Paloma: In-Situ Measurement of the Isotopic Composition of Mars Atmosphere

Details Paloma: In-Situ Measurement of the Isotopic Composition of Mars Atmosphere Paloma: In-Situ Measurement of the Isotopic Composition of Mars Atmosphere

Jul 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000came.work..160j&link_type=abstract

Concepts and Approaches for Mars Exploration, p. 160

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Mars Atmosphere, In Situ Measurement, Atmospheric Composition, Isotope Ratios, Isotopes, Trace Elements

Scientific paper

Scientific objectives for an atmospheric analysis of Mars are presented in the DREAM project. Among the information presently available most are fragmentary or limited in their precision for both major element (H, C, O, N) and noble gas isotopes. These data are necessary for the understanding and modelling of Mars atmospheric formation and evolution, and consequently for other planets, particularly the Earth. To fulfill the above requirements, two approaches can be envisonned: 1) analysis of a returned sample (DREAM project) or 2) in situ analysis, e.g. PALOMA project presented here. Among the advantages of in situ analysis, we notice: the minimal terrestrial contamination, the unlimited availability of gas to be analyzed and the possibility of multiple analyses (replicates, daynight... ). Difficulties specific to in situ analyses are of a very different kind to those of returned samples. In situ analysis could also be viewed as a preparation to future analysis of returned samples. Finally, some of the measurements will not be possible on Earth: for instance, radon and its short lived decay products, will provide complementary information to 4-He analysis and can only be obtained in situ, independently of analytical capabilities.

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