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Martian slope streaks as plausible indicators of transient water activity
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.ORCID iD: 0000-0002-2502-6384
Institut für Kartographie, Technische Universität Dresden.
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
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2017 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 7, no 1, 7074Article in journal (Refereed) Published
Abstract [en]

Slope streaks have been frequently observed in the equatorial, low thermal inertia and dusty regions of Mars. The reason behind their formation remains unclear with proposed hypotheses for both dry and wet mechanisms. Here, we report an up-to-date distribution and morphometric investigation of Martian slope streaks. We find: (i) a remarkable coexistence of the slope streak distribution with the regions on Mars with high abundances of water-equivalent hydrogen, chlorine, and iron; (ii) favourable thermodynamic conditions for transient deliquescence and brine development in the slope streak regions; (iii) a significant concurrence of slope streak distribution with the regions of enhanced atmospheric water vapour concentration, thus suggestive of a present-day regolith-atmosphere water cycle; and (iv) terrain preferences and flow patterns supporting a wet mechanism for slope streaks. These results suggest a strong local regolith-atmosphere water coupling in the slope streak regions that leads to the formation of these fluidised features. Our conclusions can have profound astrobiological, habitability, environmental, and planetary protection implications

Place, publisher, year, edition, pages
Nature Publishing Group, 2017. Vol. 7, no 1, 7074
National Category
Other Physics Topics Aerospace Engineering
Research subject
Atmospheric science
Identifiers
URN: urn:nbn:se:ltu:diva-64991DOI: 10.1038/s41598-017-07453-9PubMedID: 28765566Scopus ID: 2-s2.0-85026747795OAI: oai:DiVA.org:ltu-64991DiVA: diva2:1130547
Note

Validerad; 2017; Nivå 2; 2017-08-15(andbra); OBS

Available from: 2017-08-10 Created: 2017-08-10 Last updated: 2017-08-17Bibliographically approved

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Publisher's full textPubMedScopushttps://www.nature.com/articles/s41598-017-07453-9

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