Publications
Filter Total Items: 948
Mars: Abundant recurring slope lineae (RSL) following the planet-encircling dust event (PEDE) of 2018
Recurring slope lineae (RSL) are dark linear markings on Mars that regrow annually and likely originate from the flow of either liquid water or granular material. Following the great dust storm (or planet-encircling dust event, PEDE) of Mars year (MY) 34, Mars Reconnaissance Orbiter/High Resolution Imaging Science Experiment has seen many more candidate RSL than in typical Mars years...
Authors
Alfred S. McEwen, Ethan I Schaefer, Colin M. Dundas, Sarah S. Sutton, Leslie K Tamppari, Matthew Chojnacki
Mars Subsurface Water Ice Mapping 2.0 data products and results
This work describes the results of the Mars Subsurface Water Ice Mapping (SWIM) project, with results on the distribution of ice on Mars from geomorphic, radar, and thermal analyses.
Authors
Nathaniel E. Putzig, Gareth A. Morgan, Zachary M. Bain, David M Hollibaugh Baker, Ali M. Bramson, Samuel W Courville, Colin M. Dundas, Rachel H. Hoover, Stefano Nerozzi, Asmin V Pathare, Matthew Perry, Eric I. Petersen, Hanna G. Sizemore, Bruce G. Campbell, Marco Mastrogiuseppe, Michael T. Mellon, Isaac B. Smith
Planetary cave exploration progresses
Planetary caves have been identified on the Moon and on Mars, and are likely to occur across the Solar System. They present a new frontier for planetary science, subsurface astrobiology, geology and human exploration. The fourth in a series of scientific meetings focusing on the science and exploration of planetary caves brought together 55 terrestrial and planetary scientists, robotics...
Authors
Timothy N. Titus, Charity M. Phillips-Lander, P. J. Boston, J. Judson Wynne, Laura H. Kerber
Lava–water interaction and hydrothermal activity within the 2014–2015 Holuhraun Lava Flow Field, Iceland
Lava that erupted during the 2014–2015 Holuhraun eruption in Iceland flowed into a proglacial river system, resulting in aqueous cooling of the lava and an ephemeral hydrothermal system. We carried out a monitoring study of this system from 2015 to 2018 to document the cooling of the lava over this time, using thermocouple measurements and data-logging sensors. The heat loss rate from...
Authors
Colin M. Dundas, Laszlo Kestay, Einat Lev, M. Elise Rumpf, Christopher W. Hamilton, Ármann Höskuldsson, Thorvaldur Thordarson
Extraformational sediment recycling on Mars
Extraformational sediment recycling (old sedimentary rock to new sedimentary rock) is a fundamental aspect of Earth’s geological record; tectonism exposes sedimentary rock, whereupon it is weathered and eroded to form new sediment that later becomes lithified. On Mars, tectonism has been minor, but two decades of orbiter instrument–based studies show that some sedimentary rocks...
Authors
Kenneth S. Edgett, Steven G. Banham, Kristen A. Bennett, Lauren A. Edgar, Christopher Edwards, Alberto G. Fairen, Christopher M. Fedo, Deirdra M. Fey, James B. Garvin, John P. Grotzinger, Sanjeev Gupta, Marie Henderson, Christopher H House, Nicolas Mangold, Scott M. McLennan, Horton E. Newsom, Scott K. Rowland, Kirsten L. Siebach, Lucy M. Thompson, Scott VanBommel, Roger C. Wiens, Rebecca M.E. Williams, Aileen Yingst
Mars orbiter for resources, ices, and environments (MORIE)
The MORIE mission concept study examined the science and technical trade space to address high priority questions related to ice reservoirs and environmental transitions. The study team converged on a medium-class SEP-enabled orbiter with seven instruments to unlock the extent and volume of subsurface ice and geologic sequence stratigraphy through time. Observations would include the...
Authors
Wendy M. Calvin, Nathaniel E. Putzig, John W Holt, Ali M. Bramson, Colin M. Dundas, Bethany L. Ehlmann, Briony H. N. Horgan, Gareth A. Morgan, Scott L. Murchie, G Wesley Patterson, Kimberly D. Seelos, Hanna G. Sizemore, Steve Matousek, Ryan Woolley, Carlos Brinoccolo, Valerie Scott, Cassie Stuurman, Kevin Wheeler, Brian Sutin, Marc Lane, Nathan Barba, Ivair Gontijo, Katherine Park, Mariko Burgin, Scott Hensley, Jan Martin, Jean Biancone, David Hinkle, Barbara Insua
Exposure of an early to middle Noachian valley network in three dimensions on Mars
We document a set of channels in a section of the Martian cratered highlands located between crustal massifs northeast of Hellas Planitia that are visible in cross section and planview >200 m below the surface. The morphometry and spatial distribution of the outcrops provide concrete geological evidence of a dynamic aqueous system in a structural sub-basin during the Early to Middle...
Authors
James A. Skinner, Corey M. Fortezzo, Peter J. Mouginis-Mark
Compositional layering in Io driven by magmatic segregation and volcanism
The compositional evolution of volcanic bodies like Io is not well understood. Magmatic segregation and volcanic eruptions transport tidal heat from Io's interior to its surface. Several observed eruptions appear to be extremely high temperature (≥ 1600 K), suggesting either very high degrees of melting, refractory source regions, or intensive viscous heating on ascent. To address this...
Authors
Dan C Spencer, Richard F. Katz, Ian J. Hewitt, David A. May, Laszlo Kestay
Evaluating stereo DTM quality at Jezero Crater, Mars with HRSC, CTX, and HiRISE images
We have used a high-precision, high-resolution digital terrain model (DTM) of the NASA Mars 2020 rover Perseverance landing site in Jezero crater based on mosaicked images from the Mars Reconnaissance Orbiter High Resolution Imaging Science Experiment (MRO HiRISE) camera as a reference dataset to evaluate DTMs based on Mars Express High Resolution Stereo Camera (MEX HRSC) and MRO Context...
Authors
Randolph L. Kirk, Robin L. Fergason, Bonnie L. Redding, Donna M. Galuszka, Ethan Smith, David Mayer, Trent M. Hare, Klaus Gwinner
Ancient Martian aeolian sand dune deposits recorded in the stratigraphy of Valles Marineris and implications for past climates
Aeolian sediment transport, deposition, and erosion have been ongoing throughout Mars's history. This record of widespread aeolian processes is preserved in landforms and geologic units that retain important clues about past environmental conditions including wind patterns. In this study we describe landforms within Melas Chasma, Valles Marineris, that occur in distinct groups with...
Authors
Matthew Chojnacki, Lori K. Fenton, Aaron R. Weintraub, Lauren A. Edgar, Mohini Jeetendra Jodhpurkar, Christopher Edwards
A global shape model for Saturn's moon Enceladus from a dense photogrammetric control network
A planetary bodys global shape provides both insight into its geologic evolution, and a key element of any Planetary Spatial Data Infrastructure (PSDI). NASAs Cassini mission to Saturn acquired more than 600 moderate- to high-resolution images ( 500 m/pixel) of the small, geologically active moon Enceladus. The moons internal global ocean and intriguing geology mark it as a candidate for...
Authors
Michael T. Bland, Lynn A. Weller, David Mayer, Brent A. Archinal
Coordination of planetary coordinate system recommendations by the IAU Working Group on Cartographic Coordinates and Rotational Elements–2020 status and future
Our goal is to request input from the lunar and planetary community regarding issues of planetary coordinate systems and cartography standards. We begin with an overview of the work of the International Astronomical Union Working Group on Cartographic Coordinates and Rotational Elements. We briefly describe the operations and membership of the Working Group, some of the various uses of...
Authors
Brent A. Archinal, C. H. Acton, A. Conrad, T. Duxbury, Daniel Hestroffer, J. L. Hilton, L. Jorda, Randolph L. Kirk, S. A. Klioner, J.-L. Margot, J. Oberst, F. Paganelli, J. Ping, K. Seidelmann, D. J. Tholen, I. P. Williams