Abundance and isotopic composition of gases in the Martian atmosphere from the Curiosity rover

Mahaffy, Paul R., Webster, Christopher R., Atreya, Sushil K., Franz, Heather, Wong, Michael, Conrad, Pamela G., Harpold, Dan, Jones, John J., Leshin, Laurie A., Manning, Heidi, Owen, Tobias, Pepin, Robert O., Squyres, Steven, Trainer, Melissa, MSL Science Team and Vasconcelos, Paulo (2013) Abundance and isotopic composition of gases in the Martian atmosphere from the Curiosity rover. Science, 341 6143: 263-266. doi:10.1126/science.1237966

Author Mahaffy, Paul R.
Webster, Christopher R.
Atreya, Sushil K.
Franz, Heather
Wong, Michael
Conrad, Pamela G.
Harpold, Dan
Jones, John J.
Leshin, Laurie A.
Manning, Heidi
Owen, Tobias
Pepin, Robert O.
Squyres, Steven
Trainer, Melissa
MSL Science Team
Vasconcelos, Paulo
Total Author Count Override 15
Title Abundance and isotopic composition of gases in the Martian atmosphere from the Curiosity rover
Journal name Science   Check publisher's open access policy
ISSN 0036-8075
Publication date 2013-07-19
Sub-type Article (original research)
DOI 10.1126/science.1237966
Open Access Status
Volume 341
Issue 6143
Start page 263
End page 266
Total pages 4
Place of publication Washington, DC, United States
Publisher American Association for the Advancement of Science
Collection year 2014
Language eng
Formatted abstract
Volume mixing and isotope ratios secured with repeated atmospheric measurements taken with the Sample Analysis at Mars instrument suite on the Curiosity rover are: carbon dioxide (CO2), 0.960(±0.007); argon-40 (40Ar), 0.0193(±0.0001); nitrogen (N2), 0.0189(±0.0003); oxygen, 1.45(±0.09) × 10−3; carbon monoxide, < 1.0 × 10−3; and 40Ar/36Ar, 1.9(±0.3) × 103. The 40Ar/N2 ratio is 1.7 times greater and the 40Ar/36Ar ratio 1.6 times lower than values reported by the Viking Lander mass spectrometer in 1976, whereas other values are generally consistent with Viking and remote sensing observations. The 40Ar/36Ar ratio is consistent with martian meteoritic values, which provides additional strong support for a martian origin of these rocks. The isotopic signature δ13C from CO2 of ~45 per mil is independently measured with two instruments. This heavy isotope enrichment in carbon supports the hypothesis of substantial atmospheric loss.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Earth Sciences Publications
Official 2014 Collection
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Citation counts: TR Web of Science Citation Count  Cited 66 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 67 times in Scopus Article | Citations
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Created: Wed, 12 Feb 2014, 14:13:16 EST by Jon Swabey on behalf of School of Earth Sciences