PROGRAM AND ABSTRACTS LPI Contribution No. 1403 PLANETARY DUNES WORKSHOP: A RECORD OF CLIMATE CHANGE April 29 – May 2, 2008 • Alamogordo, New Mexico Sponsors Lunar and Planetary Institute National Aeronautics and Space Administration NASA Mars Exploration Program Scientific Organizing Committee Timothy Titus U. S. Geological Survey Rose Hayward U. S. Geological Survey Mary Bourke Planetary Science Institute Nick Lancaster Desert Research Institute Lori Fenton Carl Sagan Center Lunar and Planetary Institute 3600 Bay Area Boulevard Houston TX 77058-1113 LPI Contribution No. 1403 Compiled in 2008 by LUNAR AND PLANETARY INSTITUTE The Lunar and Planetary Institute is operated by the Universities Space Research Association under a cooperative agreement with the Science Mission Directorate of the National Aeronautics and Space Administration. Any opinions, findings, and conclusions or recommendations expressed in this volume are those of the author(s) and do not necessarily reflect the views of the National Aeronautics and Space Administration. Material in this volume may be copied without restraint for library, abstract service, education, or personal research purposes; however, republication of any paper or portion thereof requires the written permission of the authors as well as the appropriate acknowledgment of this publication. Abstracts in this volume may be cited as Author A. B. (2008) Title of abstract. In Planetary Dunes Workshop: A Record of Climate Change, p. XX. LPI Contribution No. 1403, Lunar and Planetary Institute, Houston. This volume is distributed by ORDER DEPARTMENT Lunar and Planetary Institute 3600 Bay Area Boulevard Houston TX 77058-1113, USA Phone: 281-486-2172 Fax: 281-486-2186 E-mail: [email protected] Mail orders requestors will be invoiced for the cost of shipping and handling. ISSN No. 0161-5297 Preface This volume contains abstracts that have been accepted for presentation at the Planetary Dunes Workshop: A Record of Climate Change, April 29–May 2, 2008, Alamogordo, New Mexico. Administration and publications support for this meeting were provided by the staff of the Publications and Program Services Department at the Lunar and Planetary Institute. Planetary Dunes Workshop: A Record of Climate Change v Contents Program .........................................................................................................................................................................1 Transverse Aeolian Ridges on Mars M. R. Balme, D. C. Berman, M. C. Bourke, S. Rafkin, and J. R. Zimbelman .................................................9 Imaging and Spectroscopy of Titan’s Dunes in the Near-Infrared J. W. Barnes .................................................................................................................................................11 Comparative Point Pattern Analysis of Hyperboreae Undae, Mars, and the Rub’ al Khali Sand Sea, Earth M. A. Bishop .................................................................................................................................................13 Barchan Dune Asymmetry: Observations from Mars M. C. Bourke ................................................................................................................................................15 Megabarchans on Mars M. C. Bourke and M. Balme .........................................................................................................................17 Migration Rates of Niveo-Aeolian Dunes in Antarctica: Implications for Martian Dunes M. C. Bourke, R. Ewing, D. Finnegan, and H. A. McGowan........................................................................19 GPR Surveys of the Jurassic Navajo Sandstone: A Potential Analogue to the Burns Formation, Meridiani Planum, Mars C. Bristow and H. Jol ...................................................................................................................................21 GPR Surveys of Sand Dunes in Antarctica as Analogs for Dunes on Mars C. Bristow, H. Jol, P. Augustinus, and I. Wallis ...........................................................................................22 Dunes on Mars, ‘Venus’, Earth, and Subaqueous Ripples: A Scaling Law for Their Elementary Size P. Claudin and B. Andreotti .........................................................................................................................23 Thermophysical Properties of Proctor Dune Field, Mars G. E. Cushing, T. N. Titus, and R. K. Hayward ............................................................................................25 Defrosting Processes on Dark Dunes: New Insights from HiRISE Images at Noachis and Aonia Terrae, Mars G. Di Achille, S. Silvestro, and G. G. Ori .....................................................................................................27 Modeling 2-D Dune Interactions S. Diniega and K. Glasner ............................................................................................................................29 Three-Dimensional Characterization and Morphological Dynamics of Gypsum Sand Dunes at White Sands National Monument Using Airborne LiDAR R. C. Ewing, G. Kocurek, A. P. B. Peyret, and D. Mohrig ...........................................................................31 Estimate and Expression of Water Ice in Polar Sand Dunes W. C. Feldman and M. C. Bourke ................................................................................................................33 Southern Hemisphere Dunes of Mars: Morphology Trends and Climate Change L. K. Fenton and R. K. Hayward ..................................................................................................................35 vi LPI Contribution No. 1403 Dune Fields on Mars: Markers of Climatic Changes? E. Gardin, C. Quantin, and P. Allemand ......................................................................................................37 Modeling Aeolian Sediment Transport Thresholds on Mars: A Shear Stress Partitioning Approach J. A. Gillies, W. G. Nickling, J. King, and N. Lancaster ..............................................................................39 Varieties of Barchan Form in the Namib Desert and on Mars A. S. Goudie and M. C. Bourke ....................................................................................................................40 Mars Global Digital Dune Database (MGD3): User’s Guide R. K. Hayward, K. F. Mullins, L. K. Fenton, T. N. Titus, K. L. Tanaka, M. C. Bourke, A. Colaprete, T. M. Hare, and P. R. Christensen .........................................................................................42 Hydrated Minerals in the North Polar Chasmata and Circum-Polar Erg B. H. N. Horgan, J. F. Bell III, P. C. Thomas, and E. Z. Noe Dobrea .........................................................44 Aeolian Sand Transport Systems — A Terrestrial Perspective N. Lancaster .................................................................................................................................................46 In-Situ Geochronology for Martian Dunes: A Review of Optical Dating Concepts and Experiments with Analog Materials K. Lepper ......................................................................................................................................................48 The Sand Seas of Titan: Discovery and Implications for Methane Climatology and Wind Patterns R. D. Lorenz, J. Radebaugh, and Cassini RADAR Team ............................................................................50 Unlocking the Environmental Conditions Recorded by Aeolian Bedforms with the Aid of High-Resolution Atmospheric Modeling T. I. Michaels.................................................................................................................................................52 Thermophysical Analysis of the North Polar Erg on Mars N. E. Putzig, M. T. Mellon, K. E. Herkenhoff, and R. J. Phillips .................................................................54 Terrestrial Analogues of Longitudinal Dunes on Titan J. Radebaugh, R. Lorenz, C. Spencer, and the Cassini RADAR Team .........................................................56 Longitudinal Dunes on Titan: A Laboratory Approach E. Reffet, S. Courrech du Pont, P. Hersen, S. Douady, and M. Fulchignoni ...............................................58 Global Survey of Martian Transverse Aeolian Ridges M. R. Salvatore .............................................................................................................................................60 Thermal Remote Sensing of Sand Transport Systems S. Scheidt, M. S. Ramsey, and N. Lancaster .................................................................................................62 Interconnected Ergs in East Thaumasia Region: Sediment Transport Pathways and Possible Source Areas S. Silvestro and G. G. Ori .............................................................................................................................63 The Role of Reptation in Dune Slipface Dynamics S. L. F. Sutton, C. McKenna Neuman, and W. Nickling ...............................................................................65 White Sands Gypsum Dunes — A Terrestrial Analog to North Polar Dunes on Mars? A. Szynkiewicz, L. M. Pratt, M. Glamoclija, C. H. Moore, E. Singer, and D. Bustos ..................................67 Planetary Dunes Workshop: A Record of Climate Change vii Mars’ North Circum-Polar Dunes: Distribution, Sources, and Migration History K. L. Tanaka