The Bagnold Dunes in Southern Summer: Active Sediment Transport on Mars Observed by the Curiosity Rover

Orbiter‐based observations have demonstrated that active aeolian environments are ubiquitous across Mars. Here we examine one such environment, the Bagnold Dune Field in Gale crater, with repeat imaging campaigns conducted from Curiosity during southern summer. Images reveal widespread migration of aeolian impact ripples (up to 2.8 cm/sol), which is in stark contrast to the inactivity of similar bedforms during southern winter. The winds responsible for steady southwestward migration of ripples are consistent with predictions of regional‐scale flows that enter the crater from the north and interact with the topography of Mount Sharp but are not fully representative of all dune‐forming winds. Inferred friction speeds of 1.5 m/s needed to explain mobilization of bedforms are likely not being achieved, and thus, a majority of sediment transport may be taking place at subthreshold conditions. This hypothesis is further supported by sand flux estimates that suggest a low saltation flux environment within the dune field.

[1]  C. Weitz,et al.  Morphologic Diversity of Martian Ripples: Implications for Large‐Ripple Formation , 2018, Geophysical Research Letters.

[2]  M. Lapôtre,et al.  Curiosity's Investigation of the Bagnold Dunes, Gale Crater: Overview of the Two‐Phase Scientific Campaign and Introduction to the Special Collection , 2018, Geophysical Research Letters.

[3]  J. Grant,et al.  Sand Grain Sizes and Shapes in Eolian Bedforms at Gale Crater, Mars , 2018, Geophysical Research Letters.

[4]  C. E. Newman,et al.  Coarse Sediment Transport in the Modern Martian Environment , 2018, Journal of Geophysical Research: Planets.

[5]  Nathan T. Bridges,et al.  The Mars Science Laboratory (MSL) Bagnold Dunes Campaign, Phase I: Overview and introduction to the special issue , 2018 .

[6]  N. Bridges,et al.  Sedimentary processes of the Bagnold Dunes: Implications for the eolian rock record of Mars , 2017, Journal of geophysical research. Planets.

[7]  Claire E. Newman,et al.  Martian aeolian activity at the Bagnold Dunes, Gale Crater: The view from the surface and orbit , 2017 .

[8]  Michal C Malin,et al.  The Mars Science Laboratory (MSL) Mast cameras and Descent imager: Investigation and instrument descriptions , 2017, Earth and space science.

[9]  Javier Gómez-Elvira,et al.  Winds measured by the Rover Environmental Monitoring Station (REMS) during the Mars Science Laboratory (MSL) rover's Bagnold Dunes Campaign and comparison with numerical modeling using MarsWRF. , 2017, Icarus.

[10]  R. Sullivan,et al.  Aeolian saltation on Mars at low wind speeds , 2017 .

[11]  Javier Gómez-Elvira,et al.  The meteorology of Gale Crater as determined from Rover Environmental Monitoring Station observations and numerical modeling. Part II: Interpretation , 2016 .

[12]  G. Kocurek,et al.  Observations of an aeolian landscape: From surface to orbit in Gale Crater , 2016 .

[13]  Javier Gómez-Elvira,et al.  The meteorology of Gale crater as determined from rover environmental monitoring station observations and numerical modeling. Part I: Comparison of model simulations with observations , 2016 .

[14]  D. Vaz,et al.  Dune‐like dynamic of Martian Aeolian large ripples , 2016 .

[15]  D. Vaz,et al.  Migrating meter-scale bedforms on Martian dark dunes: Are terrestrial aeolian ripples good analogues? , 2016 .

[16]  R. A. Yingst,et al.  Large wind ripples on Mars: A record of atmospheric evolution , 2016, Science.

[17]  L. Marinangeli,et al.  Present-day aeolian activity in Herschel Crater, Mars , 2016 .

[18]  C. Narteau,et al.  Two modes for dune orientation , 2014 .

[19]  J. Avouac,et al.  Threshold for sand mobility on Mars calibrated from seasonal variations of sand flux , 2014, Nature Communications.

[20]  J. Kok,et al.  Basaltic sand ripples at Eagle Crater as indirect evidence for the hysteresis effect in martian saltation , 2014 .

[21]  P. Geissler,et al.  Pervasive Aeolian Activity Along Rover Curiosity's Traverse in Gale Crater, Mars , 2013 .

[22]  N. Bridges,et al.  Shifting sands on Mars: insights from tropical intra‐crater dunes , 2013 .

[23]  K. Lewis,et al.  Growth and form of the mound in Gale Crater, Mars: Slope wind enhanced erosion and transport , 2012, 1205.6840.

[24]  J. Avouac,et al.  Earth-like sand fluxes on Mars , 2012, Nature.

[25]  T. Michaels,et al.  Orbital observations of contemporary dune activity in Endeavor crater, Meridiani Planum, Mars , 2011 .

[26]  N Thomas,et al.  Seasonal Erosion and Restoration of Mars’ Northern Polar Dunes , 2011, Science.

[27]  D. Rubin.  A unifying model for planform straightness of ripples and dunes in air and water , 2010 .

[28]  M. Bourke,et al.  Aeolian processes and dune morphology in Gale Crater , 2010 .

[29]  Gian Gabriele Ori,et al.  Ripple migration and dune activity on Mars: Evidence for dynamic wind processes , 2010 .

[30]  Jeffrey R. Johnson,et al.  Gone with the wind: Eolian erasure of the Mars Rover tracks , 2010 .

[31]  J. Kok,et al.  An improved parameterization of wind‐blown sand flux on Mars that includes the effect of hysteresis , 2010 .

[32]  J. Kok,et al.  Difference in the wind speeds required for initiation versus continuation of sand transport on mars: implications for dunes and dust storms. , 2010, Physical review letters.

[33]  Jeffrey R. Johnson,et al.  Wind-driven particle mobility on Mars: Insights from Mars Exploration Rover observations at "El Dorado" and surroundings at Gusev Crater , 2008 .

[34]  José S Andrade,et al.  Giant saltation on Mars , 2008, Proceedings of the National Academy of Sciences.

[35]  Jeffrey R. Johnson,et al.  First in situ investigation of a dark wind streak on Mars , 2008 .

[36]  Bruce A. Cantor,et al.  Recent Aeolian Dune Change on Mars , 2008 .

[37]  L. Fenton.  Dune migration and slip face advancement in the Rabe Crater dune field, Mars , 2006 .

[38]  Bruno Andreotti,et al.  A scaling law for aeolian dunes on Mars, Venus, Earth, and for subaqueous ripples , 2006, cond-mat/0603656.

[39]  M. Richardson,et al.  Aeolian processes in Proctor Crater on Mars: Mesoscale modeling of dune‐forming winds , 2005 .

[40]  Stephen R. Lewis,et al.  Modeling the Martian dust cycle, 1. Representations of dust transport processes , 2002 .

[41]  F. Forget,et al.  Modeling the Martian Dust Cycle 2. Multiannual Radiatively Active Dust Transport Simulations Journal Article , 2022 .

[42]  R. Wilson,et al.  A topographically forced asymmetry in the martian circulation and climate , 2002, Nature.

[43]  Y. Shao,et al.  A simple expression for wind erosion threshold friction velocity , 2000 .

[44]  S. Lewis,et al.  Western boundary currents in the Martian atmosphere: Numerical simulations and observational evidence , 1995 .

[45]  Pascal Lee,et al.  Longitudinal dunes on Mars: Relation to current wind regimes , 1995 .

[46]  H. Tsoar,et al.  Bagnold, R.A. 1941: The physics of blown sand and desert dunes. London: Methuen , 1994 .

[47]  Jeffrey R. Barnes,et al.  Mars atmospheric dynamics as simulated by the NASA Ames General Circulation Model: 1. The zonal‐mean circulation , 1993 .

[48]  R. Greeley,et al.  Martian aeolian features and deposits : comparisons with general circulation model results , 1993 .

[49]  J. Tillman,et al.  Observations of Martian surface winds at the Viking Lander 1 Site , 1990 .

[50]  D. Rubin,et al.  Flume experiments on the alignment of transverse, oblique, and longitudinal dunes in directionally varying flows , 1990 .

[51]  R E Arvidson,et al.  Three Mars Years: Viking Lander 1 Imaging Observations , 1983, Science.

[52]  B. R. White,et al.  Saltation threshold on Earth, Mars and Venus , 1982 .

[53]  R. M. Henry,et al.  Meteorological results from the surface of Mars: Viking 1 and 2 , 1977 .

[54]  J. Cutts,et al.  Eolian deposits and dunes on Mars , 1973 .

[55]  Joshua Lederberg,et al.  Variable features on Mars: Preliminary mariner 9 television results , 1972 .

[56]  H. Heywood.  The Physics of Blown Sand and Desert Dunes , 1941, Nature.

[57]  C. Wentworth.  A Scale of Grade and Class Terms for Clastic Sediments , 1922, The Journal of Geology.

[58]  N. Bridges,et al.  An integrated model for dune morphology and sand fluxes on Mars , 2017 .

[59]  A. McEwen,et al.  Planet-wide sand motion on Mars , 2012 .

[60]  J. Pollack,et al.  Dynamics of the atmosphere of Mars , 1992 .

[61]  Ronald Greeley,et al.  Rate of wind abrasion on Mars , 1982 .

[62]  Edwin Dinwiddie McKee,et al.  A study of global sand seas , 1979 .