International Planetary Workshop

VEXAG #14 Thursday, December 11/16/20171, 2016 - 9:50 AM EST VEXAG 1 Science Organizing Committee

Conveners Timothy Titus U.S. Geological Survey, Astrogeology Science Center, Flagstaff, Arizona

Gerald Bryant Colorado Plateau Field Institute, Dixie State University, St. George, Utah

Scientific Organizing Committee Lori Fenton Carl Sagan Center, SETI Institute, Mountain View, California Marzieh Foroutan University of Calgary, Canada Candice Hansen-Koharcheck Institute, Tucson, Arizona Rosalyn Hayward U.S. Geological Survey, Astrogeology Science Center, Flagstaff, Arizona Jani Radebaugh Department of Geological Sciences, Brigham Young University, Provo, Utah David Rubin Department of Earth and Planetary Sciences, University of California, Santa Cruz James Zimbelman National Air and Space Museum, Smithsonian Institution, Washington, D.C.

11/16/2017 VEXAG 2 Fields Across the Solar System • Terrestrial • • Earth • Land/Deserts • Oceans/Rivers • • Outer Satellites • • Triton? • Dwarf Planets • ? • Airless Bodies • Comets • Volatile Rich Impacts

11/16/2017 VEXAG 3 Planetary Dune Workshop Objectives • Increase the cross-talk and collaborations between • Terrestrial Aeolian Scientists • Planetary Aeolian Scientists • Multiple Disciplines • Facilitate the fusion of • Remote Sensing • Analog Research • Laboratory Experiments including wind tunnels • Computer Modeling and Simulations • Prepare the next generation of scientists • Graduate Students • Undergraduates • Expand aeolian analog studies to bedforms formed under water (subaqueous) which may provide better analogs for aeolian processes on planets such as Venus.

11/16/2017 VEXAG 4 History of the Dune Workshops

• 2008 Alamagordo, NM • All have been organized in cooperation • EOS Meeting Report with the Lunar Planetary Institute • Geomorphology • 2010 Alamosa, CO • All abstracts are available online • EOS Meeting Report • Aeolian Research Report • Earth Srf Processes & Landforms • 2012 Flagstaff, AZ • EOS Meeting Report • Aeolian Research Report • Icarus Special Issue • 2015 Boise, ID • EOS Meeting Report • Aeolian Research (In progress) • 2017 St. Geo., UT

11/16/2017 VEXAG 5 History & Statistics

Work- Location Dates Total No. of No. Students No. Articles shop Attendanc Students Funded Countries in e Represente Special d Issue

1st IPDW Alamogordo, Apr/May ~45 > 3 3 (MPO) 8 11 NM 2008 2nd IPDW Alamosa, CO May ~40 > 3 3 (MPO) 6 14 2010 3rd IPDW Flagstaff, AZ June ~50 > 3 3 (MPO) 9 19 2012 4th IPDW Boise, ID May ~60 10 3 (MPO) 8 10 2015 5th IPDW St. Geo., UT May ~65 18 8 10 TBD 2017 (MPO/SSW)

11/16/2017 VEXAG 6 Attendance & Topics

• 65 Registered • Subaqueous Processes Attendees • Remote Sensing • Professionals • • Graduate Students & In Situ Studies Undergraduates (17) • Computer Modeling • 1 High School Student • Laboratory Experiments • International Flavor • 4 Continents • 10 Nations

11/16/2017 VEXAG 7 11/16/2017 VEXAG 8 11/16/2017 VEXAG 9 The Importance of Dunes on a Variety of Planetary Surfaces (5th) • New Paradigms for New Analogs • Terrestrial subaqueous research • Gusev Crater Dune Fields, Mars • Aeolian Sandstones (e.g. Zion National Monument) • A record of past activity • A source for new activity • Aeolian processes seldom operate in isolation • Volcanic/Tectonic • Fluvial

11/16/2017 VEXAG 10 Sand Sources

• Multiple Processes are • Venus the sources of sediment • Only a few dunes • Earth • Lack of sediment ? • • Tectonics Volcanism • • Volcanism Cratering • Erosion • Titan • Aeolian • Photodissociation of • Fluvial methane in upper • Mars atmosphere • It “snows” hydrocarbons • Volcanism • Cratering • Wind Erosion

11/16/2017 VEXAG 11 Implications for Venus

• Al-Uzza Undae • 2 Known Dune Fields Diameter: 150 km • Microdunes may be • Location: present • 67.7N • 90.5E • Why the lack of dunes? • Menat Undae • Low wind speeds? • Lack of sediment? • Diameter: 100 km • Lack of higher spatial • Location: resolution data to • 24.8S resolve smaller dune • 339.4E fields?

11/16/2017 VEXAG 12 4th IPDW – Aeolian Research • Mikhail A. Kreslavsly, Nataliya V. Bondarenko • Aeolian sand transport and Aeolian deposits on Venus: A review • Lynn D.V. Neakrase, Martina Klose, Timothy N. Titus • Terrestrial subaqueous seafloor dunes: Possible analogs for Venus

http://www.sciencedirect.com/science/journal/18759637/ 26/supp/C?sdc=2

11/16/2017 VEXAG 13 Call for Papers for: 5th International Planetary Dunes Workshop Special Issue • Submission acceptance begins: 01 October 2017 Submission deadline through: 15 January 2018 • Organizers: Simone Silverstro, INAF Osservatorio Astronomico Capodimonte Timothy Titus, US Geological Survey • This issue will include papers from the 5th Annual Planetary Dunes Workshop that was held in May 2017 in St. George, Utah. All the papers focusing on aeolian and fluvial bedforms on different bodies of our Solar System (including Earth) are welcomed. The papers of the special issue can focus on all aspects of the mechanism of bedform formation and development (, geomorphology, sedimentology, physics of transport and modeling). Papers on yardangs morphology and development are also welcomed. Attendance at the workshop is not required to submit a paper to this special issue. • Special collection submissions can be submitted to JGR-Planets. • For additional information, please contact: [email protected]

11/16/2017 VEXAG 14 The Next Workshop • San Jose, CA Area? • May 2019 • Focus • Decadal Survey • Missions • Analogs and Laboratory Facilities • Thick Atmospheres • Venus • Oceans and Rivers as Analogs • www.mars-dunes.org • Website has expanded to include many worlds. • http://astrogeology.usgs.gov/geology/mars- dunes/workshops

11/16/2017 VEXAG 15 Venus Participation Needed

• Sub-aqueous dune analog session • Venus input into “Findings” • Why do we only observe two Large Dune Fields? • Are their micro dune fields? • Request funding for invited travel for 3 speakers (sub-aqueous) and ~7 students. • This is in addition to support from Mars Exploration Program (3 Students)

11/16/2017 VEXAG 16 Zion: A Record of Past Aeolian Activity

11/16/2017 VEXAG 17