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Mars methane detection and variability at Gale crater

Webster, C. R. and Mahaffy, P. R. and Atreya, S. K. and Flesch, G. J. and Mischna, M. A. and Meslin, P.-Y. and Farley, K. A. and Conrad, P. G. and Christensen, L. E. and Pavlov, A. A. and Martin-Torres, J. and Zorzano, M.-P. and McConnochie, T. H. and Owen, T. and Eigenbrode, J. L. and Glavin, D. P. and Steele, A. and Malespin, C. A. and Archer, P. D. and Sutter, B. and Coll, P. and Freissinet, C. and McKay, C. P. and Moores, J. E. and Schwenzer, S. P. and Bridges, J. C. and the MSL Science Team and DLR Collaborator (MSL-Science Team), Reitz G (2014) Mars methane detection and variability at Gale crater. Science. American Association for the Advancement of Science (AAAS). doi: 10.1126/science.1261713. ISSN 0036-8075.

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Abstract

Reports of plumes or patches of methane in the Martian atmosphere that vary over monthly timescales have defied explanation to date. From in situ measurements made over a 20-month period by the Tunable Laser Spectrometer (TLS) of the Sample Analysis at Mars (SAM) instrument suite on Curiosity at Gale Crater, we report detection of background levels of atmospheric methane of mean value 0.69 ± 0.25 ppbv at the 95% confidence interval (CI). This abundance is lower than model estimates of ultraviolet (UV) degradation of accreted interplanetary dust particles (IDP’s) or carbonaceous chondrite material. Additionally, in four sequential measurements spanning a 60-sol period, we observed elevated levels of methane of 7.2 ± 2.1 (95% CI) ppbv implying that Mars is episodically producing methane from an additional unknown source.

Item URL in elib:https://elib.dlr.de/94268/
Document Type:Article
Title:Mars methane detection and variability at Gale crater
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Webster, C. R.Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA; chris.r.webster (at) jpl.nasa.govUNSPECIFIEDUNSPECIFIED
Mahaffy, P. R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Atreya, S. K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Flesch, G. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mischna, M. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Meslin, P.-Y.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Farley, K. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Conrad, P. G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Christensen, L. E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pavlov, A. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Martin-Torres, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Zorzano, M.-P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
McConnochie, T. H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Owen, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Eigenbrode, J. L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Glavin, D. P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Steele, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Malespin, C. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Archer, P. D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sutter, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Coll, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Freissinet, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
McKay, C. P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Moores, J. E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schwenzer, S. P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bridges, J. C. and the MSL Science TeamUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
DLR Collaborator (MSL-Science Team), Reitz GRadiation Biology Department, Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany.UNSPECIFIEDUNSPECIFIED
Date:2014
Journal or Publication Title:Science
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI:10.1126/science.1261713
Publisher:American Association for the Advancement of Science (AAAS)
Series Name:Epub ahead of print
ISSN:0036-8075
Status:Published
Keywords:Mars, methane detection, Gale crater, Curiosity
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Vorhaben MSL-Radiation (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Radiation Biology
Deposited By: Kopp, Kerstin
Deposited On:13 Jan 2015 14:31
Last Modified:08 Mar 2018 18:51

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