Publications
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Summary of the Third International Planetary Dunes Workshop: remote sensing and image analysis of planetary dunes
The Third International Planetary Dunes Workshop took place in Flagstaff, AZ, USA during June 12–15, 2012. This meeting brought together a diverse group of researchers to discuss recent advances in terrestrial and planetary research on aeolian bedforms. The workshop included two and a half days of oral and poster presentations, as well as one formal (and one informal) full-day field trip. Similar
Authors
Lori K. Fenton, Rosalyn K. Hayward, Briony H.N. Horgan, David M. Rubin, Timothy N. Titus, Mark A. Bishop, Devon M. Burr, Matthew Chojnacki, Cynthia L. Dinwiddie, Laura Kerber, Alice Le Gall, Timothy I. Michaels, Lynn D.V. Neakrase, Claire E. Newman, Daniela Tirsch, Hezi Yizhaq, James R. Zimbelman
A new dry hypothesis for the formation of Martian linear gullies
Long, narrow grooves found on the slopes of martian sand dunes have been cited as evidence of liquid water via the hypothesis that melt-water initiated debris flows eroded channels and deposited lateral levées. However, this theory has several short-comings for explaining the observed morphology and activity of these linear gullies. We present an alternative hypothesis that is consistent with the
Authors
Serina Diniega, Candice J. Hansen, Jim N. McElwaine, C.H. Hugenholtz, Colin M. Dundas, Alfred S. McEwen, Mary C. Bourke
Observations of the northern seasonal polar cap on Mars: I. Spring sublimation activity and processes
Spring sublimation of the seasonal CO2 northern polar cap is a dynamic process in the current Mars climate. Phenomena include dark fans of dune material propelled out onto the seasonal ice layer, polygonal cracks in the seasonal ice, sand flow down slipfaces, and outbreaks of gas and sand around the dune margins. These phenomena are concentrated on the north polar erg that encircles the northern r
Authors
C.J. Hansen, Shane Byrne, Ganna Portyankina, Mary C. Bourke, Colin M. Dovichin, Alfred S. McEwen, Michael T. Mellon, Antoine Pommerol, N. Thomas
Crater-based dating of geological units on Mars: methods and application for the new global geological map
The new, post-Viking generation of Mars orbital imaging and topographical data provide significant higher-resolution details of surface morphologies, which induced a new effort to photo-geologically map the surface of Mars at 1:20,000,000 scale. Although from unit superposition relations a relative stratigraphical framework can be compiled, it was the ambition of this mapping project to provide ab
Authors
Thomas Platz, Gregory Michael, Kenneth L. Tanaka, James A. Skinner, Corey M. Fortezzo
Introduction to the fifth Mars Polar Science special issue: key questions, needed observations, and recommended investigations
The Fifth International Conference on Mars Polar Science and Exploration – which was held from September 12–16, 2011, at the Pike’s Waterfront Lodge in Fairbanks, Alaska – is the latest in a continuing series of meetings that are intended to promote the exchange of knowledge and ideas between planetary and terrestrial scientists interested in Mars polar and climate research (http://www.lpi.usra.ed
Authors
Stephen M. Clifford, Kenji Yoshikawa, Shane Byrne, William Durham, David Fisher, Francois Forget, Michael Hecht, Peter Smith, Leslie Tamppari, Timothy Titus, Richard Zurek
Correlating multispectral imaging and compositional data from the Mars Exploration Rovers and implications for Mars Science Laboratory
In an effort to infer compositional information about distant targets based on multispectral imaging data, we investigated methods of relating Mars Exploration Rover (MER) Pancam multispectral remote sensing observations to in situ alpha particle X-ray spectrometer (APXS)-derived elemental abundances and Mössbauer (MB)-derived abundances of Fe-bearing phases at the MER field sites in Gusev crater
Authors
Ryan B. Anderson, James F. Bell
High-resolution satellite and airborne thermal infrared imaging of precursory unrest and 2009 eruption of Redoubt Volcano, Alaska
A combination of satellite and airborne high-resolution visible and thermal infrared (TIR) image data detected and measured changes at Redoubt Volcano during the 2008–2009 unrest and eruption. The TIR sensors detected persistent elevated temperatures at summit ice-melt holes as seismicity and gas emissions increased in late 2008 to March 2009. A phreatic explosion on 15 March was followed by more
Authors
Rick L. Wessels, R. Greg Vaughan, Matthew R. Patrick, Michelle L. Coombs
Martian fluvial conglomerates at Gale Crater
Observations by the Mars Science Laboratory Mast Camera (Mastcam) in Gale crater reveal isolated outcrops of cemented pebbles (2 to 40 millimeters in diameter) and sand grains with textures typical of fluvial sedimentary conglomerates. Rounded pebbles in the conglomerates indicate substantial fluvial abrasion. ChemCam emission spectra at one outcrop show a predominantly feldspathic composition, co
Authors
Rebecca M.E. Williams, J.P. Grotzinger, W. E. Dietrich, S. Gupta, D.Y. Sumner, R. C. Wiens, N. Mangold, M. C. Malin, K.S. Edgett, S. Maurice, O. Forni, O. Gasnault, A. Ollila, Horton E. Newsom, G. Dromart, M.C. Palucis, R.A. Yingst, Ryan Anderson, Kenneth E. Herkenhoff, S. Le Mouélic, W. Goetz, M.B. Madsen, A. Koefoed, J.K. Jensen, J.C. Bridges, S.P. Schwenzer, K.W. Lewis, K.M. Stack, D. Rubin, L.C. Kah, J.F. Bell, J.D. Farmer, R. Sullivan, T. Van Beek, D.L. Blaney, O. Pariser, R.G. Deen
Crater topography on Titan: implications for landscape evolution
We present a comprehensive review of available crater topography measurements for Saturn’s moon Titan. In general, the depths of Titan’s craters are within the range of depths observed for similarly sized fresh craters on Ganymede, but several hundreds of meters shallower than Ganymede’s average depth vs. diameter trend. Depth-to-diameter ratios are between 0.0012 ± 0.0003 (for the largest crater
Authors
Catherine D. Neish, R. L. Kirk, R. D. Lorenz, V.J. Bray, P. Schenk, B.W. Stiles, E. Turtle, Ken Mitchell, A. Hayes
Evaluation of ISCCP multisatellite radiance calibration for geostationary imager visible channels using the moon
Since 1983, the International Satellite Cloud Climatology Project (ISCCP) has collected Earth radiance data from the succession of geostationary and polar-orbiting meteorological satellites operated by weather agencies worldwide. Meeting the ISCCP goals of global coverage and decade-length time scales requires consistent and stable calibration of the participating satellites. For the geostationary
Authors
Thomas C. Stone, William B. Rossow, Joseph Ferrier, Laura M. Hinkelman
Mars Global Digital Dune Database (MGD3): Global dune distribution and wind pattern observations
The Mars Global Digital Dune Database (MGD3) is complete and now extends from 90°N to 90°S latitude. The recently released south pole (SP) portion (MC-30) of MGD3 adds ∼60,000 km2 of medium to large-size dark dune fields and ∼15,000 km2 of sand deposits and smaller dune fields to the previously released equatorial (EQ, ∼70,000 km2), and north pole (NP, ∼845,000 km2) portions of the database, bring
Authors
Rosalyn K. Hayward, Lori Fenton, Timothy N. Titus
Soil diversity and hydration as observed by ChemCam at Gale crater, Mars
The ChemCam instrument, which provides insight into martian soil chemistry at the submillimeter scale, identified two principal soil types along the Curiosity rover traverse: a fine-grained mafic type and a locally derived, coarse-grained felsic type. The mafic soil component is representative of widespread martian soils and is similar in composition to the martian dust. It possesses a ubiquitous
Authors
P.-Y. Meslin, O. Gasnault, O. Forni, S. Schroder, A. Cousin, G. Berger, S.M. Clegg, J. Lasue, S. Maurice, V. Sautter, S. Le Mouélic, R. C. Wiens, C. Fabre, W. Goetz, D.L. Bish, N. Mangold, B. Ehlmann, N. Lanza, A.-M. Harri, Ryan Anderson, E. Rampe, T.H. McConnochie, P. Pinet, D. Blaney, D. Archer, B. Barraclough, S. Bender, D. Blake, J.G. Blank, N. Bridges, B. C. Clark, L. DeFlores, D. Delapp, G. Dromart, M.D. Dyar, M. R. Fisk, B. Gondet, J. Grotzinger, Kenneth E. Herkenhoff, J. Johnson, J.-L. Lacour, Y. Langevin, L. Leshin, E. Lewin, M.B. Madsen, N. Melikechi, Alissa Mezzacappa, M.A. Mischna, J.E. Moores, H. Newsom, A. Ollila, N. Renno, J.B. Sirven, R. Tokar, M. de la Torre, L. d'Uston, D. Vaniman, A. Yingst