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  • Martin-Torres, JavierLuleå tekniska universitet,Rymdteknik,Instituto Andaluz de Ciencias de la Tierra (CSIC-UGR), 18100 Armilla, Granada, Spain (author)

Transient liquid water and water activity at Gale crater on Mars

  • Article/chapterEnglish2015

Publisher, publication year, extent ...

  • 2015-04-13
  • Springer Science and Business Media LLC,2015
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:ltu-3272
  • https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-3272URI
  • https://doi.org/10.1038/ngeo2412DOI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Validerad; 2015; Nivå 2; 20150428 (javmar)
  • Water is a requirement for life as we know it1. Indirect evidence of transient liquid water has been observed from orbiter on equatorial Mars2, in contrast with expectations from large-scale climate models. The presence of perchlorate salts, which have been detected at Gale crater on equatorial Mars by the Curiosity rover3, 4, lowers the freezing temperature of water5. Moreover, perchlorates can form stable hydrated compounds and liquid solutions by absorbing atmospheric water vapour through deliquescence6, 7. Here we analyse relative humidity, air temperature and ground temperature data from the Curiosity rover at Gale crater and find that the observations support the formation of night-time transient liquid brines in the uppermost 5 cm of the subsurface that then evaporate after sunrise. We also find that changes in the hydration state of salts within the uppermost 15 cm of the subsurface, as measured by Curiosity, are consistent with an active exchange of water at the atmosphere–soil interface. However, the water activity and temperature are probably too low to support terrestrial organisms8. Perchlorates are widespread on the surface of Mars9 and we expect that liquid brines are abundant beyond equatorial regions where atmospheric humidity is higher and temperatures are lower.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Zorzano, María-PazCentro de Astrobiología (INTA-CSIC), 28850 Torrejón de Ardoz, Madrid, Spain(Swepub:ltu)marzor (author)
  • Valentin-Serrano, PatriciaInstituto Andaluz de Ciencias de la Tierra (CSIC-UGR), 18100 Armilla, Granada, Spain; Centro de Astrobiología (INTA-CSIC), 28850 Torrejón de Ardoz, Madrid, Spain (author)
  • Harri, Ari-MattiEarth Observation Research, Finnish Meteorological Institute, 00101 Helsinki, Finland (author)
  • Genzer, MariaEarth Observation Research, Finnish Meteorological Institute, 00101 Helsinki, Finland (author)
  • Kemppainen, OskuEarth Observation Research, Finnish Meteorological Institute, 00101 Helsinki, Finland (author)
  • Rivera-Valentin, Edgard G.Arecibo Observatory, Universities Space Research Association, Arecibo, Puerto Rico 00612, USA (author)
  • Jun, InsooJet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109, USA (author)
  • Wray, JamesSchool of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia 30332, USA (author)
  • Madsen, Morten BoNiels Bohr Institute, University of Copenhagen, Øster Voldgade 5-7, DK-1350 Copenhagen, Denmark (author)
  • Goetz, WalterMax-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg 3, D-37077 Göttingen, Germany (author)
  • McEwen, Alfred S.Lunar and Planetary Lab, University of Arizona, Tucson, Arizona 210063, USA (author)
  • Hardgrove, CraigArizona State University, Tempe, Arizona 85281, USA (author)
  • Renno, NiltonCollege of Engineering University of Michigan, Ann Arbor, Michigan 48109, USA (author)
  • Chevrier, Vincent F.Arkansas Center for Space and Planetary Sciences, University of Arkansas, Fayetteville, Arkansas 72701, USA (author)
  • Mischna, MichaelJet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109, USA (author)
  • Navarro-Gonzalez, RafaelLaboratorio de Química de Plasmas y Estudios Planetarios, Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Mexico D.F. 04510, México (author)
  • Martínez-Frías, JesúsInstituto de Geociencias (CSIC-UCM), 28040 Madrid, Spain (author)
  • Conrad, PamelaNASA Goddard Space Flight Center, Greenbelt, Maryland 20771, USA (author)
  • McConnochie, TimDepartment of Astronomy, University of Maryland, College Park, Maryland 20742, USA (author)
  • Cockell, CharlesUK Centre for Astrobiology, School of Physics and Astronomy, Edinburgh EH9 3JZ, UK (author)
  • Berger, GillesIRAP, Université Toulouse, CNRS, 14 avenue Edouard Belin, 31400 Toulouse, France (author)
  • Vasavada, Ashwin R.Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109, USA (author)
  • Sumner, DawnDepartment of Earth and Planetary Sciences, University of California, Davis, California 95616, USA (author)
  • Vaniman, DavidPlanetary Science Institute, Tucson, Arizona 85719, USA (author)
  • Luleå tekniska universitetRymdteknik (creator_code:org_t)

Related titles

  • In:Nature Geoscience: Springer Science and Business Media LLC8:5, s. 357-3611752-08941752-0908

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