Program and Abstracts

 

6th International Planetary Dunes Workshop

 

Tuesday, May 12, 2020

8:00 a.m. PDT (GMT -7)

Planetary Aeolian Virtual Presentations: Dynamics, Landforms, and the Climate/Geological Record

 

Wednesday, May 13, 2020

8:00 a.m. PDT (GMT -7)

Virtual Decade Survey White Papers and Concepts - Planetary Aeolian Analogs, Exploration, Models, and Facilities for the Next Decade

 

Virtual Posters

 

Virtual Posters:  Planetary Aeolian Processes and Landforms

 

Tuesday, May 12, 2020

PLANETARY AEOLIAN VIRTUAL PRESENTATIONS: DYNAMICS, LANDFORMS, AND THE CLIMATE/GEOLOGICAL RECORD

8:00 a.m.

Moderators:  Serina Diniega and James Zimbelman

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Times

Authors (*Denotes Presenter)

Abstract Title and Summary

8:00 a.m.

Titus T *

Introduction/Objectives

8:15 a.m.

Titus T. N. *   Hayward R. K.   Sunda A. M.

Sediment Flux IN-situ eXperiment (SFINX) [#3003]
Sediment flux is usually measured by using sediment catchers (SC). SCs are unreliable for extended studies in remote/extreme environments. We investigated the use of commercially available off-the-shelf piezo-electric devices to measure sediment flux.

8:30 a.m.

Williams K. E. *   Titus T. N.

Venus Antidunes:  Lessons from Unconfined Terrestrial Density Currents [#3015]
Previous efforts have considered the possibility that some dunes in the Venusian Al-Uzza Undae dunefield could be antidunes. Given some assumptions regarding geologic setting, we show that flow characteristics may be calculated.

8:45 a.m.

Runyon K. D. *   MacKenzie S.   Newman C.   Yu X.

Titan’s Sediment-Moving Winds [#3014]
We computed the wind threshold intermittency for 25 sites across Titan and found that sand should be mobile 15 ±5% of the time.

9:00 a.m.

Yu X. *   Horst S. M.   He C.   Mcguiggan P.   Zhang X.

Material Properties of Tholin:  Implications for Aeolian Processes on Titan [#3016]
We used novel techniques to characterize the cohesive, electrostatic, and mechanical properties of organic sand analogs on Titan. We found the Titan sand is stickier, softer and more brittle than terrestrial sands, and is not likely to carry charges.

9:15 a.m.

 

DISCUSSION:  Dynamics

9:45 a.m.

Kozakiewicz J. *   Nowak L.   Nowinski G.   Sobucki M.   Frodyma N.

Aeolian Sediments and Forms Along the Opportunity Rover Traverse [#3026]
We present results of detail investigation on aeolian sediments and forms observed by the Opportunity rover along its traverse from Eagle Crater to Perseverance Valley using semi-automatic techniques.

10:00 a.m.

Silvestro S. *   Vaz D. A.   Salese F.   Pajola M.   Popa C. I.   Franzese G.   Mongelluzzo G.   Porto C.   Ruggeri A. C.   Cozzolino F.   Esposito F.

Aeolian Bedforms in the ESA/ROSCOSMOS ExoMars 2020 Landing Site of Oxia Planum (Mars) [#3009]
TARs/PBRs in the ExoMars landing site. Evidence of climatic changes?

10:15 a.m.

Chojnacki M. *   Silvestro S.   Vaz D.

Mega-Ripple and Candidate Transverse Aeolian Ridge Migration on Mars — A Continuum of Martian Bedforms [#3028]
This abstract provides an update on Martian mega-ripple and TAR activity and implications for planetary aeolian science.

10:30 a.m.

Yizhaq H. *   Swet N.   Saban L.   Katra I.

Rediscovery of the Fluid Drag Ripples in Wind Tunnel Experiments [#3005]
We studied the formation of fluid drag ripples in a series of wind tunnel experiments with 40–70 μm glass beads. We observed the transition between small impact ripples to larger and wavy fluid drag ripples by increasing the wind speed.

10:45 a.m.

 

DISCUSSION:  Bedforms

11:15 a.m.

Khuller A. R.   Diniega S. *

The Mineralogy and Thermophysical Properties of Dunes on Mars:  Implications for the Age and Origin of Martian Sand [#3051]
Some key questions on martian sands are: (1) What is the composition of the sand? (2) Is the sand sourced locally, or globally? (3) What is the particle size of the sand? Here we analyze TES and THEMIS data to address these questions.

11:30 a.m.

Chojnacki M. *   Jodhpurkar M.   Fenton L. K.   Edgar L. A.   Edwards C.   Weintraub A. R.

Ancient Paleo-Erg Deposits in Apollinaris Sulci — A Record of Aeolian System Change and Preservation [#3020]
A partially preserved paleo-dune field in Apollinaris Sulci is explored, revealing new clues about the region’s past paleo-flow regime and geologic history.

11:45 p.m.

 

DISCUSSION:  Record and Erosion

 

Wednesday, May 13, 2020

VIRTUAL DECADE SURVEY WHITE PAPERS AND CONCEPTS - PLANETARY AEOLIAN ANALOGS, EXPLORATION, MODELS, AND FACILITIES FOR THE NEXT DECADE

8:00 a.m.

Moderator:  Timothy Titus

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Times

Authors (*Denotes Presenter)

Abstract Title and Summary

8:00 a.m.

Titus T. *

Introduction/Objectives

8:10 a.m.

Williams K. *

Subaqueous Surfaces as Planetary Analogs

8:20 a.m.

Diniega S. *

Mars as an Analog

8:30 a.m.

Kozakiewicz J. *

Aeolian Sediments and Forms Along the Opportunity Rover Traverse

8:40 a.m.

Diniega S. *   Newman C.   Swann C.   Ewing R.   Avouac J-P.   Banfield D.   Barba N.   Burr D.   Esposito F.   Fenton L.   Giersch L.   Gillies J.   Gough R.   Jackson B.   Lange C.   Merrison J.   Soto A.   Sullivan R.   Walker I.

The Importance and Feasibility of In Situ Martian Aeolian and Meteorological Investigations [#3007]
Sand, dust, heat, and wind / Should be measured together / Via new mission.

8:50 a.m.

 

DISCUSSION:  Analog and In Situ Studies

9:00 a.m.

 

Break

9:10 a.m.

Bapst J. *

Mars Science Helicopter Compelling Science Enabled by an Aerial Platform

9:20 a.m.

Lorenz R. *

Aeolian Science from the Dragonfly Rotorcraft Lander for Titan

9:30 a.m.

Tamppari L. *

The MOSAIC Mission Concept

9:40 a.m.

Montabone L. *

Observing Mars from Areostationary Orbit:  Benefits and Applications

9:50 a.m.

Newman C. *

Toward Predicting Martian Dust Storms and Climate

10:00 a.m.

 

DISCUSSION:  Mission, Models and Technology

10:10 a.m.

 

Break

10:20 a.m.

Wiliams D. *

Planetary Aeolian Laboratory (PAL)

10:30 a.m.

Burr D. M. *   Day M.   Fenton L.   Lapotre M.   Neakrase L.   Swann C.   Walker I.   Williams D.

Facilities for Planetary Aeolian Experimental Research:  A Draft White Paper [#3029]
As Aeolian processes are common in the Solar System, experimental facilities for simulating them are increasingly vital. Aeolian experimental facilities are available. However, facilities for simulating extra-terrestrial processes require support.

10:40 a.m.

Neakrase L. *

Data Archival....Distribution

10:50 a.m.

Titus T. *

Planetary Aeolian Goals Document

11:00 a.m.

 

White Paper Discussions

12:00 p.m.

 

Workshop Wrap Up

 

VIRTUAL POSTERS:  PLANETARY AEOLIAN PROCESSES AND LANDFORMS

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Authors (*Denotes Presenter)

Abstract Title and Summary

Fryberger S. G.   Valdez A. D.

Small Ventifacts at Great Sand Dunes, Colorado, A New Source for Mars Analogues [#3001]
A variety of small ventifacts have recently been discovered at Great Sand Dunes National Park, Colorado, USA. Many of the geological features of the ventifacts and nearby areas at Great Sand Dunes are similar to those seen on sandy areas of Mars.

Valdez A. D.

The Balance of Aeolian and Hydrologic Processes at Great Sand Dunes, Colorado, USA [#3002]
An overview of fluvial/aeolian processes at Great Sand Dunes. Would work well as a precursor to the field trip.

Weitz C. M.   Sullivan R. J.   Lapotre M. G. A.   Rowland S. K.   Grant J. A.   Baker M. M.   Yingst R. A.

Physical Properties of Sand Grains in the Bagnold Dunes at Gale Crater, Mars [#3004]
We measured the size and shape of sand grains at nine targets on the Bagnold dune field within Gale Crater. The median size range of active sand at the Bagnold Dunes is narrow and the majority of sizes are very fine (50–150 μm).

Diniega S.   Nield J.   Wiggs G.   Baddock M.

Protodunes on Mars [#3006]
Baby dunes forming / Wind, cohesion, turbulence / Why here and not there?

Cohen-Zada A. L.

Wind Streaks Fieldwork as a Tool for Planetary Research [#3008]
Fieldwork of Earth wind streaks were carried out to examine surficial properties variations affecting their appearance in remote sensing images. Better understanding wind streaks can be useful for assessing planetary surface-atmosphere interactions.

Burr D. M.   Jacobsen R. E.   Viviano C. E.   Michaels T. I.   Chojnacki M.

Investigating the Source(s) of Dark Sand in the Western Medusae Fossae Formation, Mars [#3010]
That Martian sand is moving -- and so likely breaking down -- highlights a long-standing question as to its source(s). We use mapping, atmospheric modeling, and spectral analysis to test hypotheses for sand source(s) in the Medusae Fossae Formation.

Boazman S. J.   Grindrod P. M.   Balme M. R.   Vermeesch P.   Davis J. M.   Baird T. R.   Silvestro S.   Chojnacki M.   Vaz D. A.   Cardinale M.   Esposito F.

Mars, Wind and Ice:  Seasonal Processes and the Effects on Polar Dune Migration at Scandia Cavi [#3011]
In this study, we have investigated the migration of linear dunes and the effects of CO2 ice at Scandia Cavi (-150° E, 78° N) over the time period 2008-2018 using HiRISE images and change detection software, COSI-Corr.

Sunda A. M.   Titus T. N.   Cushing G.

An Encroaching Dune Through the Eye of Time-Lapse Photography at Grand Falls Dune Field [#3012]
The Grand Falls Dune Field (GFDF), located on the Navajo Nation, is used as a Mars analog study site. In the spring of 2019, we captured the slip face of a small encroaching dune in time-lapse photography.

Fenton L. K.

Adding New, Smaller Dune Fields to the Mars Global Digital Dune Database Inventory [#3013]
There once was a dune database whose dune fields Rose Hayward did trace. More dunes have been found on the ground, crater-bound, and you can find them now at:  https://www.dropbox.com/sh/0vhnkhmhw8qzix5/AAC5meToxgSGImYHYxhaid4Na?dl=0.

Nagle-McNaughton T. P.   Scuderi L. A.

Using Self-Organizing Maps to Explore Potential Methods for Automatically Extracting Transverse Aeolian Ridges from HiRISE Imagery [#3017]
Six textural bands derived from HiRISE imagery are used to make pseudo-multiband images which are explored via self-organizing maps to measure the potential for the automated detection of transverse aeolian ridges (TARs) on Mars.

Gullikson A. L.   Hunter M. A.   Titus T. N.   Okubo C.

Planetary Geoscience Map Gateway:  Implementation of the Mars Global Digital Dune Database [#3018]
We are developing a new data portal, the Planetary Geoscience Map Gateway (PGMG), which will be a standardized, semantic-based geospatial on-line catalog. Here we present on the structure and implementation of the Mars Dune Database into the PGMG.

Jackson B.   Lorenz R. D.   Barnes J. W.   Szurgot M.

Dust Devils on Titan [#3019]
Titan Dust Devils / No problem for Dragonfly / Very gentle winds.

Widmer J. M.   Fenton L. K.

Investigating the Influence of Dust Storm Directions on Surface Winds via Sand Dune Morphologies in the Northern Mid-Latitudes of Mars [#3021]
Dunes tell a story / Of present-day winds, but do / Dust storms interfere?

Narteau C.    P.   Dong Z.   Claudin P.   Rodriguez S.   fernandez-Cascales L.   Courrech du Pont S.

Two Dune Growth Mechanisms in a Landscape Scale Experiment [#3023]
By comparing the destabilisation of a flat sand bed to the development of conical sand piles on a non-erodible bed, a landscape-scale experiment provides a unique set of data to analyse the coexistence of different dune growth mechanisms.

Gadal C.   Narteau C.   Ewing R. C.   Gunn A.   Jerolmack D.   Andreotti B.   Claudin P.

Spatial and Temporal Development of the Dune Instability at White Sands Dune Field, New Mexico, USA [#3024]
The spatial increase in height of incipient dunes at White Sands Dune Field is field evidence for the spatial development of the flat bed instability, and confirm the validity of the linear theory in describing dune emergence in non-homogeneous zones of loose sand.

Rozier O.   Narteau C.   Gadal C.   Claudin P.   Courrech du Pont S.

Elongation and Stability of a Linear Dune [#3025]
Elongating linear dunes are individual sand ridges aligned near the resultant transport direction. Using a cellular automaton model, we show that the sand loss increases with the length of the dune which eventually converges to a steady state.

Fenton L. K.   Silvestro S.   Kocurek G.

Pattern Evolution in Transverse Aeolian Ridges (TARs) in Scandia Cavi, Mars [#3027]
Dunes crawl over TARs / Shedding ripples and chaos. / Is this how TARs move?

Lorenz R. D.   Sawyer C. A.   Adams D. S.   Mehta N. L.   Turtle E. P.

Namib Analogs to Titan Dunes:  High Resolution Satellite Topography [#3030]
Satellite Data / Shows Namib dunes in detail / Dragonfly is go!

Zimbelman J. R.   Scheidt S. P.   Baker M. M.   Williams E.

Three-Dimensional Documentation of the Transition from Sand Ripples to Megaripples [#3031]
Stereo photographs are used to produce high-resolution digital terrain models of the transition from sand ripples to megaripples, as documented at Great Sand Dunes National Park.

Burr D. M.   Sutton S. L. F.   Emery J. P.   Nield E. V.   Kok J. F.   Smith J. K.   Bridges N. T.

A Wind Tunnel Study of the Effect of Intermediate Density Ratio on Saltation Threshold [#3032]
Previous data suggested the importance of a density ratio term in calculating threshold. Using the Titan Wind Tunnel, we derive a new (second) dataset in the intermediate density ratio region. Our data give higher values for the threshold parameter.

Neakrase L. D. V.   Rees S. K.   Huber L.   Chanover N.   Pagán T. D.   Sweebe K.   Martinez V. I.

Wind, Dunes, and Data:  PDS is Expanding, Important New Tools [#3033]
Changes in program elements are forcing changes with data management. PDS is in the process of expanding what is accepted data (field and lab data) and adding tools for archiving it.

Baker M. M.   Zimbelman J.   Scheidt S. P.   Weitz C. M.   Sullivan R.   deSilva S. L.   Banks M. E.

Megaripples at Great Sand Dunes National Park and the Puna Plateau as Terrestrial Analogs for Aeolian Bedforms in Gale Crater, Mars [#3034]
We combine data collected from two Mars analog sites with available orbital and ground truth data from Gale crater on Mars to interpret megaripple-like bedforms seen along the Curiosity rover’s traverse.

Crevier J.   Szurgot M.   Jackson B.   Lorenz R.

Developing an Arduino Package to Probe Active Dust Devils with a Drone [#3035]
We are developing a drone-mounted instrument package to probe the relationships between a dust devil’s internal structure (pressures, wind field, etc.) and its dust-lifting capacity.

Portyankina G.   Hansen C. J.   Aye K.-M.

Sand, Wind, and Ices on Mars:  How Sandy Environments Facilitate Erosion by CO2 Jets [#3036]
We hypothesize that during the process of araneiform creation on Mars sand suspended in the pressurized CO2 gas leads to more efficient erosion. This might explain why new dendritic troughs are observed to exclusively appear near sand dunes.

Runyon K. D.   Viviano C. E.   Day M. D.

Dunes to Yardangs:  Deposition and Erosion in Syria and Daedalia Plana, Mars [#3037]
We interpret bright lineaments and delta-shaped landforms to be indurated dunes currently undergoing abrasion that may be been deposited by pyroclastic density currents.

Dorn T. C .   Day M. D.

Intracrater Sediment Trapping and Transport in Arabia Terra [#3038]
On Mars, dune fields often form in basins such as craters. We observed 121 craters in Arabia Terra with terminal dune fields. Using these craters, we determine the maximum slope of a crater wall that sediment can migrate up.

Bristow N. R.   Best J. L.   Christensen K. T.   Baddock M.   Wiggs G.   Delorme P.   Nield J.

The Origin of Aeolian Dunes — The Fluid Dynamics of Early-Stage Protodune Development Measured in a Refractive-Index-Matching Flume Environment [#3039]
The work presented herein involves a combination of field measurements, documenting the initiation and morphological development of sand patches and protodunes, in concert with measurements of the flow-form interactions in a laboratory flume.

Sneed J. W.   Day M. D.   Stack K. M.   Fraeman A. A.

Experimental Hypothesis Testing of the Origins of Periodic Bedrock Ridges [#3040]
Periodic Bedrock Ridges are erosional features found on the modern wind-dominated surface of Mars with poorly constrained formation mechanisms. We discuss experimental procedures which test multiple hypotheses for their origin.

MacKenzie S. M.   Runyon K.   Lorenz R. D.   Yu X.   Radebaugh J.

Prospects for Abrasion on Titan [#3041]
We investigate how abrasion would/could work on Titan.

Duran Vinent O.   Andreotti B.   Claudin P.   Winter C.

A Unified Model of Ripples and Dunes in Water and Planetary Environments [#3042]
Process-based simulations of subaqueous and aeolian bedform show two basic planetary types consistent with subaqueous ripples and dunes. This provides a new unifying framework to compare planetary ripples and dunes to their terrestrial counterparts.

Scheidt S. P.   Zimbelman J. R.   Baker M. M.

Grain-Scale Field Documentation of Aeolian Terrestrial Analogs Using Stereophotogrammetery of Megaripples at Great Sand Dunes [#3043]
Terrestrial analogs of megaripples are documented at the grain scale using stereophotogrammetry methods. Various scales of bedforms, including the coarse grain fraction, are quantitatively extracted from the data for analysis.

Nerozzi S.   Ortiz M. R.   Holt J. W.

The Basal Unit at the North Pole of Mars:  An Amazonian Record of Mars’ Polar Aeolian and Glacial History [#3044]
The basal unit / A thick book of sand and ice / Read Mars’ history.

Kreslavsky M. A.   Ermakov A. I.

Slopes of Dune Slip Faces on the Earth and Mars [#3045]
Slip faces of terrestrial dunes changes at month time scale. There are minor systematic differences in slip face slopes between terrestrial dune fields. There is no systematic difference in the slip face slopes between martian and terrestrial dunes.

Soto A.   Nowicki K.   Pyke B.   Shoffner M.

Hura:  An Instrument for Atmospheric and Aeolian Science [#3046]
We have been developing Hura, a compact, laser-based instrument capable of measuring wind velocity and atmospheric particle concentration, size and shape, all of which are important to understanding the atmospheric contribution to aeolian processes.

Lake B. D.   Radebaugh J.   Christiansen E. H.   Rose D.   Barnes J. W.   Turtle E. P.

Sand Distribution and Possible Surface Albedo Influences in the Shangri-La Sand Sea of Titan [#3047]
Using Cassini data, we argue that colliding air currents above the SE margin of Shangri-La may account for the geomorphology of the sand sea, our mapped interpretation of relative sand abundances, and the topography of the region compared to Xanadu.

Radebaugh J.   Kerber L.   McDougall D.   Sevy J.   Rabinovitch J.

Formation of Yardangs out of Wind-Sculpted Bedrock:  Implications for Planetary Surfaces [#3048]
Yardangs can form spontaneously out of a uniform bedrock surface by the action of wind.

McDougall D.   Radebaugh J.   Kerber L.   Sevy J.   Rabinovitch J.   Christiansen E. H.

Yardang Shapes Reveal Substrate Lithology and Material Properties in the Argentinian Puna [#3049]
The quantitative relationship between yardang size, shape, and substrate material properties is explored for yardangs in and around the Campos de Piedras Pomez, Argentina. We consider implications for yardangs in the Medusae Fossae Formation, Mars.

Dinwiddie C. L.   Titus T. N.

Seasonal Dark Dune Spots and Dark Dune Spot Flows in the Southern Latitudes of Mars [#3050]
We constrain the origins of DDS flows by analyzing mission data for spectral evolution, geomorphic signatures, and thermal attributes, and modeling near-surface ground temperatures.

Wagoner C. M. *   Runyon K. D.

A Survey of Uncommon Yardang Morphologies Around Mars’ Medusae Fossae Formation [#3022]
An overview of eight uncommon yardang morphologies found while mapping yardang distribution across Mars.