Zobrazeno 1 - 10
of 13
pro vyhledávání: '"George D. McDonald"'
Autor:
George D. McDonald, Joshua Méndez Harper, Lujendra Ojha, Paul Corlies, Josef Dufek, Ryan C. Ewing, Laura Kerber
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-9 (2022)
Dunes may form on Jupiter’s moon Io. Despite a tenuous atmosphere, interactions between widespread lava and sulfur dioxide frost may produce vapor flows dense enough to mobilize sand grains. Ridge-like features may be evidence of this phenomenon.
Externí odkaz:
https://doaj.org/article/bd8c925fcbce4c46b5dd329f1e5ee3f1
Short-period sub-Neptunes with substantial volatile envelopes are among the most common type of known exoplanets. However, recent studies of the Kepler population have suggested a dearth of sub-Neptunes on highly irradiated orbits, where they are vul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb56ddf4e9643d23961959d61a0f46ec
Autor:
Lujendra Ojha, Christian Huber, Matthew Chojnacki, Ken L. Ferrier, Alfred S. McEwen, George D. McDonald, James J. Wray, Andrew Shumway, Michael D. Smith, Anthony D. Toigo, Michael J. Wolff
Publikováno v:
Journal of Geophysical Research: Planets. 122:2193-2214
Dark topographic slumps several meters wide, tens of meters in length and up to a meter in depth are observed on the slopes of Juventae Chasma (JC), Valles Marineris (VM), Mars. These slumps usually originate near the terminal points of recurring slo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5ca97b32c7145f8e50440da0115301f2
https://doi.org/10.1002/2017je005375
https://doi.org/10.1002/2017je005375
Autor:
George D. McDonald, Devon M. Burr, Michael Malaska, J. S. Méndez Harper, Josef Dufek, J. McAdams, James J. Wray, Alexander G. Hayes
Publikováno v:
Nature Geoscience. 10:260-265
Triboelectric, or frictional, charging is a ubiquitous yet poorly understood phenomenon in granular flows. Recognized in terrestrial volcanic plumes and sand storms, such electrification mechanisms are possibly present on Titan. There, dunes and plai
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::747cd9248837827c9bff0e1e0b2f4313
https://doi.org/10.1038/ngeo2921
https://doi.org/10.1038/ngeo2921
Autor:
Alexander G. Hayes, Michael Malaska, James J. Wray, Sarah M. Hörst, Jason D. Hofgartner, Lucas Liuzzo, Ralph D. Lorenz, Elizabeth P. Turtle, George D. McDonald, Morgan L. Cable, Máté Ádámkovics, Paul Corlies, Jacob Buffo
From orbit, the visibility of Titan's surface is limited to a handful of narrow spectral windows in the near-infrared (near-IR), primarily from the absorption of methane gas. This has limited the ability to identify specific compounds on the surface
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1c7586fd136255c54b6d4be37561e315
Publikováno v:
Icarus. 357:114268
Numerous laboratory experiments, starting in the Viking Lander era, have reported that frictional interactions between Martian analog dust grains can catalyze electrostatic processes (i.e. triboelectrification). Such findings have been cited to sugge
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::564a1a21b98d9727333c9f65d2251f1f
https://doi.org/10.1016/j.icarus.2020.114268
https://doi.org/10.1016/j.icarus.2020.114268
Autor:
Alejandro Soto, Tetsuya Tokano, George D. McDonald, Gang Chen, Claire E. Newman, Antoine Lucas, Juan M. Lora, Alexander G. Hayes, Ryan C. Ewing
Publikováno v:
Icarus. 270:197-210
Wind-blown dunes are a record of the climatic history in Titan’s equatorial region. Through modeling of the climatic conditions associated with Titan’s historical orbital configurations (arising from apsidal precessions of Saturn’s orbit), we p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c7a12c90b227b2d8e06e9288d7216cc
https://doi.org/10.1016/j.icarus.2015.11.036
https://doi.org/10.1016/j.icarus.2015.11.036
Publikováno v:
Geomorphology. 240:44-53
Aeolian dune-fields are composed of different spatial scales of bedform patterns that respond to changes in environmental boundary conditions over a wide range of time scales. This study examines how variations in spatial scales of dune and ripple pa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0dddd6ff2b2079448269945bc6f7e98f
https://doi.org/10.1016/j.geomorph.2014.11.023
https://doi.org/10.1016/j.geomorph.2014.11.023
Autor:
Michael D. Smith, George D. McDonald, Anthony D. Toigo, Matthew Chojnacki, James J. Wray, Ken L. Ferrier, M. J. Wolff, Christian Huber, Andrew Shumway, Lujendra Ojha
Publikováno v:
Geological Society of America Abstracts with Programs.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e920353d0cbb256b9bc06117136ef931
https://doi.org/10.1130/abs/2017am-305966
https://doi.org/10.1130/abs/2017am-305966