Journal Article10.1029/2010GL043646
An improved parameterization of wind‐blown sand flux on Mars that includes the effect of hysteresis
TL;DR: In this article, the impact threshold for Mars conditions has been quantified, which is an order of magnitude below the fluid threshold, leading to the occurrence of hysteresis.
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Abstract: [1] Saltation, the wind-driven hopping motion of sand grains, forms dunes and ripples, and ejects fine dust particles into the atmosphere on Mars. Although the wind speed at which saltation is initiated, the “fluid threshold,” has been studied extensively, the wind speed at which saltation is halted, the “impact threshold,” has been poorly quantified for Mars conditions. I present an analytical model of the impact threshold, which is in agreement with measurements and numerical simulations for Earth conditions. For Mars conditions, the impact threshold is approximately an order of magnitude below the fluid threshold, in agreement with previous studies. Saltation on Mars can thus be sustained at wind speeds an order of magnitude less than required to initiate it, leading to the occurrence of hysteresis. I include the effect of hysteresis into an improved parameterization of sand transport on Mars.
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Citations
Diurnal Variability in Aeolian Sediment Transport at Gale Crater, Mars
M. M. Baker,Claire E. Newman,Robert Sullivan,Michelle E. Minitti,Kenneth S. Edgett,Deirdra M. Fey,Douglas Ellison,Kevin W. Lewis +7 more
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TL;DR: In this paper , a suite of high resolution cameras onboard the Mars Science Laboratory (MSL) Curiosity rover have provided an unparalleled look at active aeolian processes on Mars, including within the first active dune field explored on another planet, the Bagnold Dunes.
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Planetary Aeolian Geomorphology
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- 08 Mar 2019
TL;DR: Aeolian sediment transport is responsible for a broad range of geophysical phenomena, including dust storms on Earth and Mars and the formation and migration of dunes on both planetary bodies, as well as on Venus and Titan as mentioned in this paper.
Dark Dunes of Mars: An Orbit-To-Ground Multidisciplinary Perspective of Aeolian Science
Mark A. Bishop
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TL;DR: In this paper, the authors discuss the current understanding of dunefield geography, dune and ripple migration, variations in mineralogy between polar and equatorial dunes, and the working of an extraterrestrial aeolian system.
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A Wind Tunnel Study of the Effect of Intermediate Density Ratio on Saltation Threshold
Devon M. Burr,Devon M. Burr,Stephen L.F. Sutton,Joshua P. Emery,Joshua P. Emery,E. V. Nield,E. V. Nield,Jasper F. Kok,J. K. Smith,J. K. Smith,Nathan T. Bridges +10 more
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