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Sökning: onr:"swepub:oai:DiVA.org:ltu-5832" > Observations and pr...

Observations and preliminary science results from the first 100 sols of MSL Rover Environmental Monitoring Station ground temperature sensor measurements at Gale Crater

Hamilton, Victoria E. (författare)
Department of Space Studies, Southwest Research Institute
Vasavada, Ashwin R. (författare)
Jet Propulsion Laboratory, California Institute of Technology, Pasadena
Sebastián, Eduardo (författare)
Centro de Astrobiologia, INTA-CSIC, Madrid
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Juárez, Manuel De La Torre (författare)
Jet Propulsion Laboratory, California Institute of Technology, Pasadena
Ramos, Miguel (författare)
Departamento de Física y Matemática, University of Alcalá
Armiens, Carlos (författare)
Centro de Astrobiologia, INTA-CSIC, Madrid
Arvidson, Raymond E. (författare)
Department of Earth and Planetary Sciences, Washington University, St. Louis
Carrasco, Isaías (författare)
Centro de Astrobiologia, INTA-CSIC, Madrid
Christensen, Philip R. (författare)
School of Earth and Space Exploration, Arizona State University
Pablo, Miguel A. De (författare)
Departamento de Geología, Geografía y Medio Ambiente, University of Alcalá
Goetz, Walter (författare)
Max-Planck-Institut für Solar System Research
Gõmez-Elvira, Javier (författare)
Centro de Astrobiologia, INTA-CSIC, Madrid
Lemmon, Mark T. (författare)
Department of Atmospheric Sciences, Texas A&M University, College Station, Texas
Madsen, Morten B. (författare)
Niels Bohr Institute, Copenhagen University
Martin-Torres, Javier (författare)
Centro de Astrobiologia, INTA-CSIC, Madrid , Instituto Andaluz de Cienccias de la Tierra (CSIC-UGR), Grenada
Martínez-Frías, Jesús (författare)
Centro de Astrobiologia, INTA-CSIC, Madrid , Instituto de Geociencias (CSIC-UCM), Ciudad Universitaria
Molina, Antonio (författare)
Centro de Astrobiologia, INTA-CSIC, Madrid , Departamento de Física y Matemática, University of Alcalá
Palucis, Marisa C. (författare)
Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles
Rafkin, Scot C R (författare)
Department of Space Studies, Southwest Research Institute
Richardson, Mark I. (författare)
Ashima Research, Pasadena
Yingst, R. Aileen (författare)
Planetary Science Institute, Tucson
Zorzano, María-Paz (författare)
Centro de Astrobiologia, INTA-CSIC, Madrid
visa färre...
 (creator_code:org_t)
2014
2014
Engelska.
Ingår i: Journal of Geophysical Research. - 0148-0227 .- 2156-2202. ; 119:4, s. 745-770
  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
Stäng  
  • We describe preliminary results from the first 100 sols of ground temperature measurements along the Mars Science Laboratory's traverse from Bradbury Landing to Rocknest in Gale. The ground temperature data show long-term increases in mean temperature that are consistent with seasonal evolution. Deviations from expected temperature trends within the diurnal cycle are observed and may be attributed to rover and environmental effects. Fits to measured diurnal temperature amplitudes using a thermal model suggest that the observed surfaces have thermal inertias in the range of 265-375?J m-2 K-1 s-1/2, which are within the range of values determined from orbital measurements and are consistent with the inertias predicted from the observed particle sizes on the uppermost surface near the rover. Ground temperatures at Gale Crater appear to warm earlier and cool later than predicted by the model, suggesting that there are multiple unaccounted for physical conditions or processes in our models. Where the Mars Science Laboratory (MSL) descent engines removed a mobile layer of dust and fine sediments from over rockier material, the diurnal temperature profile is closer to that expected for a homogeneous surface, suggesting that the mobile materials on the uppermost surface may be partially responsible for the mismatch between observed temperatures and those predicted for materials having a single thermal inertia. Models of local stratigraphy also implicate thermophysical heterogeneity at the uppermost surface as a potential contributor to the observed diurnal temperature cycle. Key Points Diurnal ground temperatures vary with location Diurnal temperature curves are not well matched by a homogeneous thermal model GTS data are consistent with a varied stratigraphy and thermophysical properties.

Ämnesord

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Aerospace Engineering (hsv//eng)
TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Rymd- och flygteknik (hsv//swe)
TEKNIK OCH TEKNOLOGIER  -- Maskinteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering (hsv//eng)

Nyckelord

ground temperature
Mars
thermal inertia
thermophysics
Atmospheric science
Atmosfärsvetenskap

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