Publications
Filter Total Items: 959
Crater-based dating of geological units on Mars: methods and application for the new global geological map 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...
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 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...
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 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...
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 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...
Authors
Rick L. Wessels, R. Greg Vaughan, Matthew R. Patrick, Michelle L. Coombs
Martian fluvial conglomerates at Gale Crater 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...
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 B. 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 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...
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 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...
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 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...
Authors
Rosalyn K. Hayward, Lori Fenton, Timothy N. Titus
Soil diversity and hydration as observed by ChemCam at Gale crater, Mars 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...
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 B. 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
The impact environment of the Hadean Earth The impact environment of the Hadean Earth
Impact bombardment in the first billion years of solar system history determined in large part the initial physical and chemical states of the inner planets and their potential to host biospheres. The range of physical states and thermal consequences of the impact epoch, however, are not well quantified. Here, we assess these effects on the young Earth's crust as well as the likelihood...
Authors
Oleg Abramov, David A. Kring Kring, Stephen J. Mojzsis
Spatial distribution of damage around faults in the Joe Lott Tuff Member of the Mount Belknap Volcanics, Utah: A mechanical analog for faulting in pyroclastic deposits on Mars Spatial distribution of damage around faults in the Joe Lott Tuff Member of the Mount Belknap Volcanics, Utah: A mechanical analog for faulting in pyroclastic deposits on Mars
Volcanic ash is thought to comprise a large fraction of the Martian equatorial layered deposits and much new insight into the process of faulting and related fluid flow in these deposits can be gained through the study of analogous terrestrial tuffs. This study identifies a set of fault-related processes that are pertinent to understanding the evolution of fault systems in fine-grained...
Authors
Chris H. Okubo
Use of ASTER and MODIS thermal infrared data to quantify heat flow and hydrothermal change at Yellowstone National Park Use of ASTER and MODIS thermal infrared data to quantify heat flow and hydrothermal change at Yellowstone National Park
The overarching aim of this study was to use satellite thermal infrared (TIR) remote sensing to monitor geothermal activity within the Yellowstone geothermal area to meet the missions of both the U.S. Geological Survey and the Yellowstone National Park Geology Program. Specific goals were to: 1) address the challenges of monitoring the surface thermal characteristics of the > 10,000...
Authors
R. Greg Vaughan, Laszlo P. Keszthelyi, Jacob B. Lowenstern, Cheryl Jaworowski, Henry Heasler