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Observational evide...
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
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- Moores, John E. (författare)
- York University
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- Lemmon, Mark T. (författare)
- Texas A&M University
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- Kahanpää, Henrik (författare)
- Finnish Meteorological Institute
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- Rafkin, Scot C R (författare)
- Southwest Research Institute, San Antonio, Texas
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- Francis, Raymond (författare)
- University of Western Ontario
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- Pla-Garcia, Jorge (författare)
- Centro de Astrobiología, Instituto Nacional de Técnica Aeroespacial
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- Bean, Keri (författare)
- Texas A&M University
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- Haberle, Robert (författare)
- Ames Research Centre, Naval Air Station, Moffett Field
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- Newman, Claire (författare)
- Ashima Research, Pasadena
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- Mischna, Michael (författare)
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena
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- Vasavada, Ashwin R. (författare)
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena
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- Juárez, Manuel de la Torre (författare)
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena
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- Rennó, Nilton (författare)
- University of Michigan
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- Bell, Jim (författare)
- Arizona State University
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- Calef, Fred (författare)
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena
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- Cantor, Bruce (författare)
- Malin Space Science Systems
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- Mcconnochie, Timothy H. (författare)
- GSFC/U Maryland
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- Harri, Ari Matti (författare)
- Finnish Meteorological Institute
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- Genzer, Maria (författare)
- Finnish Meteorological Institute
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- Wong, Michael H. (författare)
- University of Michigan
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- Smith, Michael D. (författare)
- NASA Goddard Space Flight Center
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- Martin-Torres, Javier (författare)
- Instituto Andaluz de Cienccias de la Tierra (CSIC-UGR), Grenada
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- Zorzano, María-Paz (författare)
- Centro de Astrobiología, Instituto Nacional de Técnica Aeroespacial
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- Kemppinen, Osku (författare)
- Finnish Meteorological Institute
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- McCullough, Emily (författare)
- University of Western Ontario
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(creator_code:org_t)
- Elsevier BV, 2015
- 2015
- Engelska.
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Ingår i: Icarus. - : Elsevier BV. - 0019-1035 .- 1090-2643. ; 249, s. 129-142
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Rymd- och flygteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Aerospace Engineering (hsv//eng)
Nyckelord
- Atmospheres
- dynamics
- Atmospheres
- structure
- Mars
- Mars
- atmosphere
- Atmosfärsvetenskap
- Atmospheric science
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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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visa fler...
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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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Martin-Torres, J ...
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Zorzano, María-P ...
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Kemppinen, Osku
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McCullough, Emil ...
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