2001
DOI: 10.1029/2000je001407
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Martian surface winds: Insensitivity to orbital changes and implications for aeolian processes

Abstract: . The primary focus of this paper is to provide constraints on the range of mechanisms proposed to explain inconsistencies between current wind direction patterns and long-term wind indicators (for example, the misalignment of rock tail and ventifact orientations at the Mars Pathfinder landing site). Specifically, we assess whether changes in planetary obliquity, precession, or global dust opacity could significantly alter patterns of surface wind directions. In all cases we find the seasonal and annual averag… Show more

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Cited by 73 publications
(88 citation statements)
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“…Atmospheric models on various scales show that the circulation at Nili Patera is dominated by a combination of the tropicalmean overturning ('Hadley') circulation, thermal tides and slope flows associated with the dichotomy boundary and the Isidis basin [28][29][30][31] . Nili Patera is located roughly 9°N of the equator within the seasonally reversing Hadley circulation.…”
Section: Resultsmentioning
confidence: 99%
“…Atmospheric models on various scales show that the circulation at Nili Patera is dominated by a combination of the tropicalmean overturning ('Hadley') circulation, thermal tides and slope flows associated with the dichotomy boundary and the Isidis basin [28][29][30][31] . Nili Patera is located roughly 9°N of the equator within the seasonally reversing Hadley circulation.…”
Section: Resultsmentioning
confidence: 99%
“…We currently have the capability to collect data on aeolian dune type, location, sediment size, lithology, and provenance and to search for evidence of dune migration (e.g., Anderson et al, 1999;Bourke et al, 2004a;Edgett and Christensen, 1991;Edgett, 2002;Garvin et al, 1999;Langevin et al, 2005;Zimbelman, 2000). We can use atmospheric models to predict wind regimes at decadal, seasonal, and even diurnal timescales (e.g., Bourke et al, 2004b;Fenton and Richardson, 2001;Fenton et al, 2005;Haberle et al, 1999;Raflíin and Michaels, 2003;Toigo and Richardson, 2003). At a more local scale, the Lander and Rover data sets have made possible the detailed examination of small-scale aeolian dunes (centimetre to meter scale) and detection of aeolian grain size and mineral composition (e.g., Greeley et al, 1999Greeley et al, , 2002Greeley et al, , 2004Sullivan et al, 2005).…”
Section: Introductionmentioning
confidence: 99%
“…Extensive presence of yardangs and of slope streaks at various locations on Mars have been detected and studied earlier 4,5 . In some cases the aeolian features are completely ephemeral and relate only to the lifting and settling of atmospheric dust, whereas certain features like dune fields, yardangs and ventifacts are more persistent and require significant time for their development 6 . Understanding of landform morphology helps reveal how in combination with previous active processes the sedimentary history of a region has eventually modified itself in response to a complex alternating process of dust accumulation and erosion brought down due to still active aeolian processes 7 .…”
Section: Introduction and Objectivesmentioning
confidence: 99%