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Observational evide...
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Moores, John E.York University
(author)
Observational evidence of a suppressed planetary boundary layer in northern Gale Crater, Mars as seen by the Navcam instrument onboard the Mars Science Laboratory rover
- Article/chapterEnglish2015
Publisher, publication year, extent ...
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Elsevier BV,2015
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printrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:ltu-2673
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https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-2673URI
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https://doi.org/10.1016/j.icarus.2014.09.020DOI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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Upprättat; 2015; 20150228 (javmar)
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The Navigation Cameras (Navcam) of the Mars Science Laboratory rover, Curiosity, have been used to examine two aspects of the planetary boundary layer: vertical dust distribution and dust devil frequency. The vertical distribution of dust may be obtained by using observations of the distant crater rim to derive a line-of-sight optical depth within Gale Crater and comparing this optical depth to column optical depths obtained using Mastcam observations of the solar disc. The line of sight method consistently produces lower extinctions within the crater compared to the bulk atmosphere. This suggests a relatively stable atmosphere in which dust may settle out leaving the air within the crater clearer than air above and explains the correlation in observed column opacity between the floor of Gale Crater and the higher elevation Meridiani Planum. In the case of dust devils, despite an extensive campaign only one optically thick vortex (τ=1.5±0.5×10-3) was observed compared to 149 pressure events > 0.5Pa observed in REMS pressure data. Correcting for temporal coverage by REMS and geographic coverage by Navcam still suggests 104 vortices should have been viewable, suggesting that most vortices are dustless. Additionally, the most intense pressure excursions observed on other landing sites (pressure drop >2.5Pa) are lacking from the observations by the REMS instrument. Taken together, these observations are consistent with pre-landing circulation modeling of the crater showing a suppressed, shallow boundary layer. They are further consistent with geological observations of dust that suggests the northern portion of the crater is a sink for dust in the current era.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
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Lemmon, Mark T.Texas A&M University
(author)
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Kahanpää, HenrikFinnish Meteorological Institute
(author)
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Rafkin, Scot C RSouthwest Research Institute, San Antonio, Texas
(author)
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Francis, RaymondUniversity of Western Ontario
(author)
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Pla-Garcia, JorgeCentro de Astrobiología, Instituto Nacional de Técnica Aeroespacial
(author)
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Bean, KeriTexas A&M University
(author)
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Haberle, RobertAmes Research Centre, Naval Air Station, Moffett Field
(author)
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Newman, ClaireAshima Research, Pasadena
(author)
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Mischna, MichaelJet Propulsion Laboratory, California Institute of Technology, Pasadena
(author)
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Vasavada, Ashwin R.Jet Propulsion Laboratory, California Institute of Technology, Pasadena
(author)
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Juárez, Manuel de la TorreJet Propulsion Laboratory, California Institute of Technology, Pasadena
(author)
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Rennó, NiltonUniversity of Michigan
(author)
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Bell, JimArizona State University
(author)
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Calef, FredJet Propulsion Laboratory, California Institute of Technology, Pasadena
(author)
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Cantor, BruceMalin Space Science Systems
(author)
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Mcconnochie, Timothy H.GSFC/U Maryland
(author)
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Harri, Ari MattiFinnish Meteorological Institute
(author)
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Genzer, MariaFinnish Meteorological Institute
(author)
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Wong, Michael H.University of Michigan
(author)
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Smith, Michael D.NASA Goddard Space Flight Center
(author)
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Martin-Torres, JavierInstituto Andaluz de Cienccias de la Tierra (CSIC-UGR), Grenada(Swepub:ltu)javmar
(author)
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Zorzano, María-PazCentro de Astrobiología, Instituto Nacional de Técnica Aeroespacial(Swepub:ltu)marzor
(author)
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Kemppinen, OskuFinnish Meteorological Institute
(author)
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McCullough, EmilyUniversity of Western Ontario
(author)
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York UniversityTexas A&M University
(creator_code:org_t)
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In:Icarus: Elsevier BV249, s. 129-1420019-10351090-2643
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Moores, John E.
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Lemmon, Mark T.
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Kahanpää, Henrik
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Rafkin, Scot C R
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Francis, Raymond
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Pla-Garcia, Jorg ...
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Bean, Keri
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Haberle, Robert
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Newman, Claire
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Mischna, Michael
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Vasavada, Ashwin ...
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Juárez, Manuel d ...
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Rennó, Nilton
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Bell, Jim
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Calef, Fred
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Cantor, Bruce
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Mcconnochie, Tim ...
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Harri, Ari Matti
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Genzer, Maria
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Wong, Michael H.
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Smith, Michael D ...
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