Article ; Online: Abundance and Isotopic Composition of Gases in the Martian Atmosphere from the Curiosity Rover
Science. 2013 July 19, v. 341, no. 6143 p.263-266
2013
Abstract: Mars' Atmosphere from Curiosity The Sample Analysis at Mars (SAM) instrument on the Curiosity rover that landed on Mars in August last year is designed to study the chemical and isotopic composition of the martian atmosphere. Mahaffy et al. (p. 263) ... ...
| Abstract | Mars' Atmosphere from Curiosity The Sample Analysis at Mars (SAM) instrument on the Curiosity rover that landed on Mars in August last year is designed to study the chemical and isotopic composition of the martian atmosphere. Mahaffy et al. (p. 263) present volume-mixing ratios of Mars' five major atmospheric constituents (CO ₂, Ar, N ₂, O ₂, and CO) and isotope measurements of ⁴⁰Ar/ ³⁶Ar and C and O in CO ₂, based on data from one of SAM's instruments, obtained between 31 August and 21 November 2012. Webster et al. (p. 260) used data from another of SAM's instruments obtained around the same period to determine isotope ratios of H, C, and O in atmospheric CO ₂ and H ₂O. Agreement between the isotopic ratios measured by SAM with those of martian meteorites, measured in laboratories on Earth, confirms the origin of these meteorites and implies that the current atmospheric reservoirs of CO ₂ and H ₂O were largely established after the period of early atmospheric loss some 4 billion years ago. |
|---|---|
| Keywords | carbon dioxide ; carbon monoxide ; gases ; isotopes ; oxygen |
| Language | English |
| Dates of publication | 2013-0719 |
| Size | p. 263-266. |
| Publishing place | American Association for the Advancement of Science |
| Document type | Article ; Online |
| ZDB-ID | 128410-1 |
| ISSN | 1095-9203 ; 0036-8075 |
| ISSN (online) | 1095-9203 |
| ISSN | 0036-8075 |
| DOI | 10.1126/science.1237966 |
| Database | NAL-Catalogue (AGRICOLA) |
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