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PANEL DISCUSSION: DO the MARTIAN POLAR LAYERED DEPOSITS FLOW, NOW OR in the PAST? 4:05 P.M

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PANEL DISCUSSION: DO the MARTIAN POLAR LAYERED DEPOSITS FLOW, NOW OR in the PAST? 4:05 P.M Fifth Mars Polar Science Conference (2011) sess153.pdf Monday, September 12, 2011 PANEL DISCUSSION: DO THE MARTIAN POLAR LAYERED DEPOSITS FLOW, NOW OR IN THE PAST? 4:05 p.m. Binkley Room Moderator: David Fisher Panel Members: Sarah Millkovich Jack Holt Christine Hvidberg William Durham Ralf Greve MODERATED DISCUSSION: DAY IN REVIEW I 5:05 p.m. Binkley Room Moderator: Jack Holt 5:35 p.m. Afternoon Session Concludes Fifth Mars Polar Science Conference (2011) sess153.pdf Monday, September 12, 2011 POSTER SESSION AND RECEPTION I: AUTHORS A–K 7:00–9:00 p.m. Copper Room Aye K.-M. Portyankina G. Pommerol A. Thomas N. Automatic Dark Spot Identification at the Martian South Pole [#6081] Image operations have been sequenced together to automatically identify dark spots in martian south polar areas. The identified areas are counted and being used as a measure of seasonal activity that will be presented as south polar maps in Ls time bins. Bapst J. Wood S. E. Modeling of Martian Subsurface Ice in Response to Recent (≤1 Myr) Orbital Progression [#6067] The focus of this work is to understand, through modeling, how subsurface water ice responds due to changes in orbital parameters and how these results compare to present-day observations. Bourke M. C. Cranford A. Seasonal Furrow Formation on Mars Polar Dunes [#6059] Elongate furrows that occur seasonally on martian dunes may form by seasonal sublimation of CO2. Byrne S. Russell P. S. Mattson S. Holt J. W. Christian S. Massé M. Putzig N. E. Herkenhoff K. E. Hvidberg C. S. Milkovich S. M. Fishbaugh K. E. HiRISE Team Exposure Analysis of Polar Stratigraphy from HiRISE Topography [#6012] We use HiRISE stereo DTMs to characterize the protrusion of layers from polar layered deposit scarps as a function of depth. A wavelet analysis of this information reveals signals in the stratigraphy of 50 m and 30 m wavelengths at different depths. Elliott H. Martinez G. M. Halleaux D. Renno N. O. The University of Michigan Microwave Soil Moisture Sensor: Detection of Liquid Brines on Mars [#6058] Measurement of the soil moisture in the martian regolith is critical to understanding the habitability of the planet, as well as the water vapor cycle. Here we propose the design of a prototype microwave remote sensing instrument for this purpose. Fazel Rastgar F. McConnell J. C. Akingunola A. Topography and Albedo Impact at Martian South Polar CO2 Ice Cap [#6043] Meteorological and physical results from Global Mars Multiscale Model (GM3-v2) were used to investigate the impact of topography and albedo on the martian southern polar ice cap. Grisolle F. Appéré T. Schmitt B. Beck P. Brissaud O. Douté S. Influence of Condensing Water Frost on the Near-IR Spectrum of CO2 Snow [#6032] Laboratory experiments have been performed to study the near-infrared spectral properties of CO2 ice and H2O ice. Comparison with spectral modeling should provide new insights on the microscopic evolution of the martian seasonal condensates. Hendrix A. R. Tamppari L. K. Wellington D. A Search for H2O2 in Mars’ Polar Regions Using Mariner 9 UVS Data [#6073] We present results of an analysis of Mariner 9 UVS data, interpreting the spectra in terms of dust, ozone and hydrogen peroxide in abundances varying with season. Herkenhoff K. E. Fortezzo C. Cushing G. Kirk R. L. Soderblom L. A. Weller L. Topography and Stratigraphy of the North Polar Layered Deposits on Mars [#6006] We will present results of our continuing study to evaluate the topography, structure, and stratigraphy of the north polar layered deposits using photoclinometry on MOC springtime images. Fifth Mars Polar Science Conference (2011) sess153.pdf Hvidberg C. S. Fishbaugh K. E. Winstrup M. Svensson A. Byrne S. Herkenhoff K. Processes Controlling Polar Deposition Rates of Ice and Dust and Constraints [#6071] In this work we consider physical processes influencing the polar deposition rates of ice and dust and discuss how these processes can be expressed in terms of the solar insolation record. Karlsson N. B. Holt J. W. Hindmarsh R. C. A. Testing for Flow in the North Polar Layered Deposits of Mars Using Radar Stratigraphy and a Simple 3D Ice Flow Model [#6028] We investigate SHARAD radar data from the NPLD combined with an ice flow model in order to extract information on past flow dynamics of Gemina Lingula. Results indicate limited influence from ice flow during the formation of the internal layers. Kite E. S. Manga M. Halevy I. Kahre M. A. Snowmelt-Limited Formation of Mars Sedimentary Rocks (Including the Lower Gale Crater Mound): A Model, Tests, and Preliminary Inversion for Early Mars Climate [#6066] We are developing a snowmelt model of the formation and distribution of sedimentary rocks on Mars. Initial results show good correspondence between areas where snowmelt is predicted, and areas where sedimentary rocks are observed. Kocurek G. Ewing R. C. Christian S. Holt J. W. Sequence Stratigraphy of the Planum Boreum Cavi Unit, North Polar Region of Mars [#6020] Stratigraphic sequences are defined within the Planum Boreum cavi unit by aeolian dunes and sets of cross-strata bounded by permafrost surfaces, reflecting a climatic cyclicity that is transitional into the overlying north polar layered deposits. Fifth Mars Polar Science Conference (2011) sess153.pdf Tuesday, September 13, 2011 POLAR COMPOSITION 8:30 a.m. Binkley Room 8:30 a.m. Gondet B. * Poulet F. Langevin Y. Bibring J.-P. Mineralogy of Hydrated Minerals in Southern Martian Terrains, as Identified by OMEGA/Mex and CRISM/MRO Investigations [#6039] Near-IR observations of high southern latitudes close to southern summer solstice by OMEGA-Mex and CRIMS/MRO reveal a broad hydration band. New observations and modeling will be reported so as to identify the corresponding minerals. 8:45 a.m. 8:45 a.m. Hanley J. * Chevrier V. F. Farris H. Analysis of the Salt Assemblage from WCL at the Phoenix Landing Site [#6072] Modeling of WCL derived concentrations at the Phoenix landing site. 9:00 a.m. Kounaves S. P. * Stroble S. T. McElhoney K. O’Neil G. D. Carrier B. L. Comparison of the Wet Chemistry Laboratory Soil Analyses on the Phoenix Mars Lander with Antarctic Dry Valley Soils, Mars Meteorite EETA 79001, Sawdust, and a Mars Simulant [#6003] Results comparing the Phoenix Lander WCL chemical analysis with Antarctic Dry Valley soils, Mars meteorite sawdust, and simulants, gives confidence that soluble composition and parent salts of the soil at the Phoenix site have been reasonably constrained. 9:15 a.m. Stillman D. E. * Grimm R. E. Dielectric Signatures of Adsorbed and Salty Liquid Water at the Phoenix Landing Site, Mars [#6045] Permittivity increases detected by TECP indicate a 1 vol.% NaClO4 and/or MgCl2 brine and the presence of 3 monolayers of adsorbed water on the regolith. Our quantitative model finds the regolith has a surface area of 1 m2/g and is radiation damaged. 9:30 a.m. Szynkiewicz A. * Borrok D. M. Merrison J. P. The Role of Sulfide Weathering in Formation of the North Polar Gypsum on Mars [#6018] In order to understand the origin of north polar gypsum on Mars, we investigated the role of sulfide weathering in terrestrial polar- and cold-settings and conducted an experiment designed to simulate aeolian gypsum transport over 2,000 km. 9:45 a.m. Horgan B. * Bell J. F. III Cloutis E. A. Compositional Relationships Between High Latitude Units and Implications for the History of the North Polar Region [#6080] Analysis of OMEGA near-infrared spectra reveals the mineralogy of the sandy units in and around Planum Boreum. Relationships between these units and with units in the northern lowlands suggest origins via volcanic, glacial, and aeolian processes. 10:00 a.m. BREAK 10:15 a.m. Massé M. * Bourgeois O. Le Mouélic S. Verpoorter C. Spiga A. Le Deit L. Wide Distribution and Glacial Origin of Polar Gypsum on Mars [#6038] We demonstrate that gypsum is present on all the north polar superficial sediments including the dune fields and the dust veneers. These gypsum-rich sediments derive directly from the BU and the NPLD ice layers. Fifth Mars Polar Science Conference (2011) sess153.pdf 10:30 a.m. Seelos F. P. Tanaka K. L. * Rodriguez J. A. P. Fortezzo C. M. North Polar Region of Mars: CRISM Data Integration and Analysis [#6044] CRISM spectral reflectance data and newly revised derived products at gimbaled and mapping spatial resolution augment geologic studies of north polar materials and features. 10:45 a.m. Poulet F. * Ody A. Langevin Y. Gondet B. Bibring J.-P. Distribution of Minerals in the Polar Regions of Mars and Comparison with Phoenix Measurements [#6009] We present updated maps of the distribution of several minerals in the high latitudes of Mars (>50°) using the Mars Express OMEGA instrument. A comparison to the Phoenix measurements is presented and the implications on the water-related processes are discussed. Fifth Mars Polar Science Conference (2011) sess153.pdf Tuesday, September 13, 2011 SEASONAL BEHAVIOR I 11:00 a.m. Binkley Room 11:00 a.m. Hayne P. O. * Aharonson O. Paige D. A. The Role of Carbon Dioxide Snowfall in the Formation and Energy Balance of the Seasonal Ice Caps of Mars [#6069] Polar winter MCS observations suggest that snowfall accounts for at least 7–15% of seasonal deposition over the SPRC. Initial comparisons between MOLA and MCS observations suggest that regions of high snowfall also tend to be those with the thickest seasonal deposits. 11:15 a.m. Hu R.-Y. * Cahoy K. Zuber M. T. Particle Size of CO2 Condensates in Mars’ Atmosphere: A Joint Analysis of Radio Occultation, Climate Sounder and Laser Ranging Experiments [#6019] We simultaneously analyze data from MGS and MRO to investigate CO2 condensation and estimate the condensation mass.
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