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Sökning: onr:"swepub:oai:DiVA.org:ltu-3272" > Transient liquid wa...

  • Martin-Torres, JavierLuleå tekniska universitet,Rymdteknik (författare)

Transient liquid water and water activity at Gale crater on Mars

  • Artikel/kapitelEngelska2015

Förlag, utgivningsår, omfång ...

  • 2015
  • printrdacarrier

Nummerbeteckningar

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

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

Ingår i deldatabas

Klassifikation

  • Ämneskategori:ref swepub-contenttype
  • Ämneskategori:art swepub-publicationtype

Anmärkningar

  • <p>Validerad; 2015; Nivå 2; 20150428 (javmar)</p>
  • 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.

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Zorzano, María-PazCentro de Astrobiologia, INTA-CSIC, Madrid , Instituto Nacional de Técnica Aeroespacial, Madrid, Centro de Astrobiologia, Madrid(Swepub:ltu)marzor (författare)
  • Valentin-Serrano, PatriciaCSIC-UGR - Instituto Andaluz de Ciencias de la Tierra (IACT), Granada (författare)
  • Harri, Ari-MattiEarth Observation Research Division, Finnish Meteorological Institute, Helsinki (författare)
  • Genzer, MariaFinnish Meteorological Institute, Earth Observation Research Division, Finnish Meteorological Institute, Helsinki (författare)
  • Kemppainen, OskuFinnish Meteorological Institute, Earth Observation Research Division, Finnish Meteorological Institute, Helsinki (författare)
  • Rivera-Valentin, Edgard G.Arecibo Observatory, Universities Space Research Association, Arecibo, Puerto Rico (författare)
  • Jun, InsooCalifornia Institute of Technology, Jet Propulsion Laboratory (författare)
  • Wray, James J.School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta (författare)
  • Madsen, Morten B.Niels Bohr Institute, University of Copenhagen (författare)
  • Goetz, WalterMax-Planck-Institut für Solar System Research (författare)
  • McEwen, Alfred S,Lunar and Planetary Lab, University of Arizona, Tucson (författare)
  • Hardgrove, CraigArizona State University, Department of Earth & Planetary Sciences, University of Tennessee, Knoxville, Malin Space Science Systems (författare)
  • Renno, NiltonUniversity of Michigan, College of Engineering, University of Michigan, Ann Arbor (författare)
  • Chevrier, Vincent F.Arkansas Center for Space and Planetary Sciences, University of Arkansas, Fayetteville (författare)
  • Mischna, Michael A.Jet Propulsion Laboratory, California Institute of Technology, Pasadena (författare)
  • Navarro-Gonzalez, RafaelInstituto de Ciencias Nucleares, Universidad Nacional Autónoma de Mexico, Ciudad Universitaria, Centro de Astrobiologia, INTA-CSIC, Madrid , Universidad Nacional Autónoma de México, Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Mexico D.F., Laboratorio de Química de Plasmas y Estudios Planetarios, Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México (författare)
  • Martínez-Frías, JesúsCentro de Astrobiologia, INTA-CSIC, Madrid , Instituto de Geociencias (CSIC-UCM), 28040 Madrid (författare)
  • Conrad, Pamela G.NASA Goddard Space Flight Center, Solar System Exploration Division, Goddard Space Flight Center, National Aeronautics and Space Administration, Greenbelt, Maryland (författare)
  • McConnochie, Timothy H.Department of Astronomy, University of Maryland, College Park (författare)
  • Cockell, CharlesESO, UK Centre for Astrobiology, School of Physics and Astronomy, (författare)
  • Berger, GillesIRAP/CNRS, Institut de Recherche en Astrophysique et Planetologie, Toulouse, Université de Toulouse, UPS-OMP, IRAP (författare)
  • Vasavada, AshwinJet Propulsion Laboratory, California Institute of Technology, Pasadena (författare)
  • Sumner, Dawn Y.Department of Earth and Planetary Sciences, University of California, Davis, Department of Geology, University of California, Davis (författare)
  • Vaniman, David T.Planetary Science Institute, Tucson (författare)
  • Luleå tekniska universitetRymdteknik (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:Nature Geoscience8:5, s. 357-3611752-08941752-0908

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