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Transient liquid wa...
Transient liquid water and water activity at Gale crater on Mars
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- Martin-Torres, Javier (author)
- Luleå tekniska universitet,Rymdteknik,Instituto Andaluz de Ciencias de la Tierra (CSIC-UGR), 18100 Armilla, Granada, Spain
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- Zorzano, María-Paz (author)
- Centro de Astrobiología (INTA-CSIC), 28850 Torrejón de Ardoz, Madrid, Spain
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- Valentin-Serrano, Patricia (author)
- Instituto Andaluz de Ciencias de la Tierra (CSIC-UGR), 18100 Armilla, Granada, Spain; Centro de Astrobiología (INTA-CSIC), 28850 Torrejón de Ardoz, Madrid, Spain
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- Harri, Ari-Matti (author)
- Earth Observation Research, Finnish Meteorological Institute, 00101 Helsinki, Finland
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- Genzer, Maria (author)
- Earth Observation Research, Finnish Meteorological Institute, 00101 Helsinki, Finland
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- Kemppainen, Osku (author)
- Earth Observation Research, Finnish Meteorological Institute, 00101 Helsinki, Finland
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- Rivera-Valentin, Edgard G. (author)
- Arecibo Observatory, Universities Space Research Association, Arecibo, Puerto Rico 00612, USA
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- Jun, Insoo (author)
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109, USA
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- Wray, James (author)
- School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
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- Madsen, Morten Bo (author)
- Niels Bohr Institute, University of Copenhagen, Øster Voldgade 5-7, DK-1350 Copenhagen, Denmark
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- Goetz, Walter (author)
- Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg 3, D-37077 Göttingen, Germany
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- McEwen, Alfred S. (author)
- Lunar and Planetary Lab, University of Arizona, Tucson, Arizona 210063, USA
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- Hardgrove, Craig (author)
- Arizona State University, Tempe, Arizona 85281, USA
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- Renno, Nilton (author)
- College of Engineering University of Michigan, Ann Arbor, Michigan 48109, USA
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- Chevrier, Vincent F. (author)
- Arkansas Center for Space and Planetary Sciences, University of Arkansas, Fayetteville, Arkansas 72701, USA
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- Mischna, Michael (author)
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109, USA
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- Navarro-Gonzalez, Rafael (author)
- Laboratorio de Química de Plasmas y Estudios Planetarios, Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Mexico D.F. 04510, México
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- Martínez-Frías, Jesús (author)
- Instituto de Geociencias (CSIC-UCM), 28040 Madrid, Spain
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- Conrad, Pamela (author)
- NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, USA
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- McConnochie, Tim (author)
- Department of Astronomy, University of Maryland, College Park, Maryland 20742, USA
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- Cockell, Charles (author)
- UK Centre for Astrobiology, School of Physics and Astronomy, Edinburgh EH9 3JZ, UK
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- Berger, Gilles (author)
- IRAP, Université Toulouse, CNRS, 14 avenue Edouard Belin, 31400 Toulouse, France
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- Vasavada, Ashwin R. (author)
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109, USA
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- Sumner, Dawn (author)
- Department of Earth and Planetary Sciences, University of California, Davis, California 95616, USA
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- Vaniman, David (author)
- Planetary Science Institute, Tucson, Arizona 85719, USA
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(creator_code:org_t)
- 2015-04-13
- 2015
- English.
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In: Nature Geoscience. - : Springer Science and Business Media LLC. - 1752-0894 .- 1752-0908. ; 8:5, s. 357-361
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- 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
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Rymd- och flygteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Aerospace Engineering (hsv//eng)
Keyword
- Atmosfärsvetenskap
- Atmospheric Science
Publication and Content Type
- ref (subject category)
- art (subject category)
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Martin-Torres, J ...
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Zorzano, María-P ...
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Valentin-Serrano ...
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Harri, Ari-Matti
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Genzer, Maria
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Kemppainen, Osku
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Rivera-Valentin, ...
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Jun, Insoo
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Wray, James
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Madsen, Morten B ...
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Goetz, Walter
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McEwen, Alfred S ...
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Hardgrove, Craig
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Renno, Nilton
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Chevrier, Vincen ...
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Mischna, Michael
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Navarro-Gonzalez ...
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Martínez-Frías, ...
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Conrad, Pamela
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McConnochie, Tim
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Cockell, Charles
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Berger, Gilles
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Vasavada, Ashwin ...
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Sumner, Dawn
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Vaniman, David
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Mechanical Engin ...
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and Aerospace Engine ...
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Nature Geoscienc ...
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Luleå University of Technology