WFRF:(Webster Paul)
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- Webster, Christopher R.Jet Propulsion Laboratory, California Institute of Technology, Pasadena (author)
Low Upper Limit to Methane Abundance on Mars
- Article/chapterEnglish2013
Publisher, publication year, extent ...
- American Association for the Advancement of Science (AAAS),2013
- printrdacarrier
Numbers
- LIBRIS-ID:oai:DiVA.org:ltu-4440
- https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-4440URI
- https://doi.org/10.1126/science.1242902DOI
Supplementary language notes
- Language:English
- Summary in:English
Part of subdatabase
- SwePubSwePub
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Notes
- Upprättat; 2013; Bibliografisk uppgift: Javier Martín-Torres ingår i the MSL Science Team.; 20150306 (ninhul)
- By analogy with Earth, methane in the Martian atmosphere is a potential signature of ongoing or past biological activity. During the past decade, Earth-based telescopic observations reported “plumes” of methane of tens of parts per billion by volume (ppbv), and those from Mars orbit showed localized patches, prompting speculation of sources from subsurface bacteria or nonbiological sources. From in situ measurements made with the Tunable Laser Spectrometer (TLS) on Curiosity using a distinctive spectral pattern specific to methane, we report no detection of atmospheric methane with a measured value of 0.18 ± 0.67 ppbv corresponding to an upper limit of only 1.3 ppbv (95% confidence level), which reduces the probability of current methanogenic microbial activity on Mars and limits the recent contribution from extraplanetary and geologic sources.
Subject headings and genre
- TEKNIK OCH TEKNOLOGIER Maskinteknik Rymd- och flygteknik hsv//swe
- ENGINEERING AND TECHNOLOGY Mechanical Engineering Aerospace Engineering hsv//eng
- Atmosfärsvetenskap
- Atmospheric science
Added entries (persons, corporate bodies, meetings, titles ...)
- Mahaffy, Paul R.NASA Goddard Space Flight Center (author)
- Atreya, Sushil K.Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, Ann Arbor (author)
- Flesch, Gregory J.Jet Propulsion Laboratory, California Institute of Technology, Pasadena (author)
- Farley, Kenneth A.Department of Geological and Planetary Sciences, California Institute of Technology, Pasadena (author)
- Martin-Torres, JavierCentro de Astrobiología (CAB)(Swepub:ltu)javmar (author)
- Jet Propulsion Laboratory, California Institute of Technology, PasadenaNASA Goddard Space Flight Center (creator_code:org_t)
Related titles
- In:Science: American Association for the Advancement of Science (AAAS)342:6156, s. 355-3570036-80751095-9203
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