Artigo Revisado por pares

The Viking Gas Exchange Experiment results from Chryse and Utopia surface samples

1977; American Geophysical Union; Volume: 82; Issue: 28 Linguagem: Inglês

10.1029/js082i028p04669

ISSN

2156-2202

Autores

Vance I. Oyama, B. J. Berdahl,

Tópico(s)

Scientific Research and Discoveries

Resumo

Journal of Geophysical Research (1896-1977)Volume 82, Issue 28 p. 4669-4676 The Viking Gas Exchange Experiment results from Chryse and Utopia surface samples Vance I. Oyama, Vance I. OyamaSearch for more papers by this authorBonnie J. Berdahl, Bonnie J. BerdahlSearch for more papers by this author Vance I. Oyama, Vance I. OyamaSearch for more papers by this authorBonnie J. Berdahl, Bonnie J. BerdahlSearch for more papers by this author First published: 30 September 1977 https://doi.org/10.1029/JS082i028p04669Citations: 191AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract Immediate gas changes occurred when untreated Martian surface samples were humidified and/or wet by an aqueous nutrient medium in the Viking lander gas exchange experiment. The evolutions of N2, CO2, and Ar are mainly associated with soil surface desorption caused by water vapor, while O2 evolution is primarily associated with decomposition of Superoxides inferred to be present on Mars. On recharges with fresh nutrient and test gas, only CO2 was given off, and its rate of evolution decreased with each recharge. This CO2 evolution is thought to come from the oxidation of organics present in the nutrient by γ Fe2O3 in the surface samples. Atmospheric analyses were also performed at both sites. The mean atmospheric composition from four analyses is N2, 2.3%; O2, ≤0.15%; Ar, 1.5%; and CO2, 96.2%. References Brunauer, S., P. H. Emmett, E. Teller, Adsorption of gases in multimolecular layers, J. Amer. 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