Zobrazeno 1 - 10
of 28
pro vyhledávání: '"John C. Armstrong"'
Publikováno v:
Journal of Agriculture, Food Systems, and Community Development, Vol 8, Iss A (2018)
Food Dignity is an inter- and postdisciplinary action research project designed to support five communities’ efforts to build sustainable food systems, tell their stories, and create common ground between the collaborating campuses and communities.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3fa9b87e6afb188af0ecb9617909ea02
https://doi.org/10.5304/jafscd.2018.08a.003
https://doi.org/10.5304/jafscd.2018.08a.003
Autor:
Cecilia M. Bitz, Thomas R. Quinn, Rodrigo Luger, Hayden Smotherman, Diego McDonald, Rodolfo Garcia, Pramod Gupta, David P. Fleming, Peter Driscoll, Caitlyn Wilhelm, John C. Armstrong, Patrick Barth, Shawn Domagal-Goldman, Russell Deitrick, Victoria S. Meadows, Benjamin Guyer, Rory Barnes
We describe a software package called VPLanet that simulates fundamental aspects of planetary system evolution over Gyr timescales, with a focus on investigating habitable worlds. In this initial release, eleven physics modules are included that mode
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::af1c087d1a80c6a173656d74ac0b6859
Autor:
Rory Barnes, David P. Fleming, Thomas R. Quinn, Caitlyn Wilhelm, Russell Deitrick, Cecilia M. Bitz, Victoria S. Meadows, John C. Armstrong, Benjamin Charnay
Publikováno v:
Astronomical Journal
Astronomical Journal, American Astronomical Society, 2018, 155 (6), pp.266. ⟨10.3847/1538-3881/aac214⟩
The Astronomical Journal
The Astronomical Journal, American Astronomical Society, 2018, 155 (6), pp.266. ⟨10.3847/1538-3881/aac214⟩
Deitrick, Russell; Barnes, Rory; Bitz, Cecilia; Fleming, David; Charnay, Benjamin; Meadows, Victoria; Wilhelm, Caitlyn; Armstrong, John; Quinn, Thomas R. (2018). Exo-Milankovitch Cycles. II. Climates of G-dwarf Planets in Dynamically Hot Systems. The astronomical journal, 155(6), p. 266. American Astronomical Society 10.3847/1538-3881/aac214
Astronomical Journal, American Astronomical Society, 2018, 155 (6), pp.266. ⟨10.3847/1538-3881/aac214⟩
The Astronomical Journal
The Astronomical Journal, American Astronomical Society, 2018, 155 (6), pp.266. ⟨10.3847/1538-3881/aac214⟩
Deitrick, Russell; Barnes, Rory; Bitz, Cecilia; Fleming, David; Charnay, Benjamin; Meadows, Victoria; Wilhelm, Caitlyn; Armstrong, John; Quinn, Thomas R. (2018). Exo-Milankovitch Cycles. II. Climates of G-dwarf Planets in Dynamically Hot Systems. The astronomical journal, 155(6), p. 266. American Astronomical Society 10.3847/1538-3881/aac214
Using an energy balance model with ice sheets, we examine the climate response of an Earth-like planet orbiting a G dwarf star and experiencing large orbital and obliquity variations. We find that ice caps couple strongly to the orbital forcing, lead
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a45e0ef877f1b0876925d3b7e7ed257a
https://hal.archives-ouvertes.fr/hal-02304436
https://hal.archives-ouvertes.fr/hal-02304436
Autor:
Edwin S. Kite, Alan D. Howard, Antoine Lucas, John C. Armstrong, Oded Aharonson, Michael P. Lamb
Unraveling the stratigraphic record is the key to understanding ancient climate and past climate changes on Mars (Grotzinger, J. et al. [2011]. Astrobiology 11, 77–87). Stratigraphic records of river deposits hold particular promise because rain or
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::47c2e6a1b59b56f8cc4ed9c25dc71766
http://arxiv.org/abs/1712.03951
http://arxiv.org/abs/1712.03951
Discoveries of extrasolar planets in the habitable zone (HZ) of their parent star lead to questions about the habitability of massive moons orbiting planets in the HZ. Around low-mass stars, the HZ is much closer to the star than for Sun-like stars.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::70d070ddba6ae666e40ac1b460274a97
http://arxiv.org/abs/1707.07040
http://arxiv.org/abs/1707.07040
Autor:
John C. Armstrong
Publikováno v:
Earth, Moon, and Planets. 107:43-54
Following the analytical work of Armstrong et al. (Icarus 160:183–196, 2002), we detail an expanded N-body calculation of the direct transfer of terrestrial material to the Moon during a giant impact. By simulating 1.4 million particles over a rang
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8c86f58c4a2cd544a113781b668664f4
https://doi.org/10.1007/s11038-010-9355-2
https://doi.org/10.1007/s11038-010-9355-2
Autor:
Thomas R. Quinn, Russell Deitrick, Caitlyn Wilhelm, Rory Barnes, John C. Armstrong, Benjamin Charnay
Publikováno v:
The Astronomical Journal
The Astronomical Journal, American Astronomical Society, 2018, 155 (2), pp.60. ⟨10.3847/1538-3881/aaa301⟩
Astronomical Journal
Astronomical Journal, American Astronomical Society, 2018, 155 (2), pp.60. ⟨10.3847/1538-3881/aaa301⟩
The Astronomical Journal, American Astronomical Society, 2018, 155 (2), pp.60. ⟨10.3847/1538-3881/aaa301⟩
Astronomical Journal
Astronomical Journal, American Astronomical Society, 2018, 155 (2), pp.60. ⟨10.3847/1538-3881/aaa301⟩
The obliquity of the Earth, which controls our seasons, varies by only ~2.5 degrees over ~40,000 years, and its eccentricity varies by only ~0.05 over 100,000 years. Nonetheless, these small variations influence Earth's ice ages. For exoplanets, howe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b48ac50f482991c6ebae3186b5b5021b
https://doi.org/10.3847/1538-3881/aaa301
https://doi.org/10.3847/1538-3881/aaa301
Autor:
R. Zollinger, John C. Armstrong
Publikováno v:
Astronomy & Astrophysics. 497:583-587
Context. The 3-planet system that contains two super Earths has recently been verified around the M dwarf Gliese 581. Recent theoretical work into the system's habitable zone (HZ) still raises questions as to the habitability of the known planets; ho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::47dad8a436ff5a40d22a550af8d70736
https://doi.org/10.1051/0004-6361/200811198
https://doi.org/10.1051/0004-6361/200811198
Autor:
John D. Rummel, Avi Mandell, Sean N. Raymond, Margaret S. Race, Emmanuelle Javaux, Mark Claire, L. Billings, Steve Vance, Jason Raymond, Annika C. Mosier, R. T. Schelble, C. Laws, L. J. Mix, J. Rask, John C. Armstrong, Frank J. Stewart, V. Cameron, O. J. Johnson, Olga Zhaxybayeva, K. von Braun, Shawn Domagal-Goldman, Gregory J. Dick
Publikováno v:
Astrobiology. 6:735-813
Astrobiology, the study of life as a planetary phenomenon, aims to understand the fundamental nature of life on earth and the possibility of life elsewhere. To achieve this goal, astrobiologists have initiated unprecedented communication between the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::03a1078e66acb313dd84bc63fd194a0d
https://doi.org/10.1089/ast.2006.6.735
https://doi.org/10.1089/ast.2006.6.735
Autor:
John C. Armstrong, Conway B. Leovy
Publikováno v:
Icarus. 176:57-74
Wind erosion and deposition are powerful agents of surface change on Mars. Erosion is sensitive to the atmospheric density, so feedback between orbit variations and atmospheric density can enhance the sensitivity of erosion rates to orbital parameter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::925c6b637db8d3e7ad06a19c2fb250aa
https://doi.org/10.1016/j.icarus.2005.01.005
https://doi.org/10.1016/j.icarus.2005.01.005