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Comparative Climatology of Terrestrial Planets III from Stars to Surface

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Comparative Climatology of Terrestrial Planets III from Stars to Surface Program Comparative Climatology of Terrestrial Planets III from Stars to Surface August 27–30, 2018 • Houston, Texas Institutional Support NASA Science Mission Directorate Lunar and Planetary Institute Universities Space Research Association National Aeronautics and Space Administration Conveners Adriana Ocampo, NASA Planetary Science Division Giada Arney, Co-Convener, NASA Goddard Space Flight Center Shawn Domagal-Goldman, Co-Convener, NASA Goddard Space Flight Center Victoria Hartwick, Co-Convener, Laboratory of Atmospheric and Space Physics Alejandro Soto, Co-Convener, Southwest Research Institute Science Organizing Committee Giada Arney, NASA Goddard Space Flight Center Simona Bordoni, California Institute of Technology David Brain, University of Colorado, Boulder Amanda Brecht, NASA Ames Research Center Ofer Cohen, University of Massachusetts, Lowell Shawn Domagal-Goldman, NASA Goddard Space Flight Center Richard Eckman, NASA Earth Science Division Colin Goldblatt, University of Victoria Victoria Hartwick, University of Colorado, Boulder Sarah Hörst, Johns Hopkins University Doug Hudgins, NASA Astrophysics Division Jared Leisner, NASA Heliophysics Science Division Janet Luhmann, University of California, Berkeley Adriana Ocampo, NASA Planetary Science Division Jonathan Rall, NASA Planetary Science Division Chris Reinhard, Georgia Institute of Technology Antigona Segura, Universidad Nacional Autónoma de México Alejandro Soto, Southwest Research Institute Elsayed Talaat, NASA Heliophysics Science Division Allan Treiman, Lunar and Planetary Institute Thomas Woods, University of Colorado, CU Mary Voytek, NASA Science Mission Directorate Lunar and Planetary Institute 3600 Bay Area Boulevard Houston TX 77058-1113 Abstracts for this conference are available via the conference website at https://www.hou.usra.edu/meetings/climatology2018/ Abstracts can be cited as Author A. B. and Author C. D. (2018) Title of abstract. In Comparative Climatology of Terrestrial Planets III: From Stars to Surfaces, Abstract #XXXX. LPI Contribution No. 2065, Lunar and Planetary Institute, Houston. Guide to Sessions Comparative Climatology of Terrestrial Planets III Lunar and Planetary Institute 3600 Bay Area Boulevard Houston TX 77058-1113 Monday, August 27, 2018 11:30 p.m. Great Room Registration 12:15 p.m. Lecture Hall Climate Evolution 3:30 p.m. Lecture Hall Star-Planet Connection 6:00 p.m. Great Room Poster Session Tuesday, August 28, 2018 8:15 a.m. Great Room Networking and Continental Breakfast 8:50 a.m. Lecture Hall Biogeochemistry, Photochemistry, and Climate I 11:00 a.m. Lecture Hall Biogeochemistry, Photochemistry, and Climate II 2:00 p.m. Hess and Berkner Rooms Unconference I 4:00 p.m. Lecture Hall CCTP Town Hall 7:00 p.m. NASA JSC Gilruth Conference Center Public Event: Storms of the Solar System and Beyond Wednesday, August 29, 2018 8:15 a.m. Great Room Networking and Continental Breakfast 8:50 a.m. Lecture Hall Climate Diversity I 10:45 a.m. Lecture Hall Climate Diversity II 1:45 p.m. Lecture Hall Climate Models, Tools, and Observations I 3:30 p.m. Hess and Berkner Rooms Unconference II 7:00 p.m. NASA JSC Gilruth Conference Center Public Event: Storms of the Solar System and Beyond (Presented in Spanish) Thursday, August 30, 2018 8:15 a.m. Great Room Networking and Continental Breakfast 8:50 a.m. Lecture Hall Climate Models, Tools, and Observations II 11:30 a.m. Lecture Hall Lessons To and From Earth 1:30 p.m. Berkner Rooms Working Lunch: CCTP Goals, Future Plans, and CCTP-3 Wrap-Up Program Monday, August 27, 2018 CLIMATE EVOLUTION 12:15 p.m. Lecture Hall 12:15 p.m. Welcome and Introduction 12:30 p.m. Wordsworth R. D. * [INVITED] Abiotic Oxidation of Planetary Atmospheres: Physical Mechanisms and Consequences for Climate, Habitability, and Biosignatures [#2020] This review highlights the central importance of planetary oxidation inside the solar system and beyond. Processes and implications for climate, life, and the observable characteristics of atmospheres are discussed. 1:00 p.m. Arney G. N. * Venus Exploration Analysis Group Venus: The Exoplanet Laboratory Next Door [#2019] Here, we will review what present and past Venus teaches us context of comparative planetology and processes that shape habitability and biosignature “false positives” in exoplanet atmospheres. 1:15 p.m. Harman C. E. * Sohl L. E. Wolf E. T. Way M. J. Tsigaridis K. Del Genio A. D. What Does It Take to Glaciate? Exploring the Climatic Link Between Atmospheric Methane and the Rise of Oxygen [#2060] The change in climate across the GOE is thought to be driven by the loss of the CH4 greenhouse effect. Here, we show ROCKE-3D simulations of climate with and without CH4, using known constraints on other surface and atmospheric parameters. 1:30 p.m. Way M. J. * Del Genio A. D. How Studies of Ancient Earth Inform Studies of Ancient Venus: Venus’ Evolutionary History and Its Implications for Venus-Like Exoplanetary Worlds [#2038] We try to leverage what scientists have learned about Earth’s 4Gyr climatic history to learn more about Venus’ climatic history using a 3-D General Circulation Model. 1:45 p.m. Goldblatt C. McDonald V. * McCusker K. Physical Feedbacks on Stratus Cloud Amount Resolve the Faint Young Sun Paradox [#2013] We perform a series of model runs with the Community Atmosphere Model to test the hypothesis that an Archean atmosphere warmed less by sunlight and more by CO2 results in less stratus cloud due to a weaker inversion at the planetary boundary layer. 2:00 p.m. Zahnle K. J. * [INVITED] Climatic Effect of Impacts on the Ocean [#2056] Documented geological evidence of very large cosmic impacts on Earth during the Archean provides some guidance to models of impact-induced catastrophic climate change on land and sea. 2:30 p.m. Break Monday, August 27, 2018 STAR-PLANET CONNECTION 3:30 p.m. Lecture Hall 3:30 p.m. Lean J. L. * [INVITED] Solar-Driven Climatology of Earth’s Extended Environment [#2016] Solar radiation is the energy source for the Earth and other terrestrial planets in the solar system. The climatology of Earth’s environment is a combination of orbitally-driven and solar-activity-driven fluctuations in received solar radiation. 4:00 p.m. Howard W. S. * Tilley M. A. Corbett H. T. Youngblood A. A. Loyd R. O. P. Ratzloff J. K. Law N. M. Fors O. del Ser D. Shkolnik E. L. Ziegler C. A. Goeke E. E. Pietraallo A. D. Haislip J. Evryscope Detection of the First Proxima Superflare: Impacts on the Atmosphere and Habitability of Proxima b [#2039] We detect the first superflare from the nearest star, Proxima Centauri, with the Evryscope array of small telescopes. We explore the impact of this extreme stellar activity on the atmosphere and surface of Proxima’s terrestrial planet, Proxima b. 4:15 p.m. Hughes G. B. * Adams J. Cockburn J. M. H. Spectral Content Variations Through a Solar Cycle and Abetting Decrease in Spectral Albedo of Glacial Ice [#2004] Solar activity directly influences melting of glacial ice via increased ultraviolet emission at solar maximum coupled with decreased spectral albedo of glacial ice; the effect is independent of any effects that solar activity might have on climate. 4:30 p.m. Egan H. * Jarvinen R. Brain D. Understanding Stellar Influence on Ion Escape from Exoplanets [#2029] By performing a systematic study of how ion loss processes vary with stellar input for typical M-dwarf conditions, we build a generalized framework to understand how ion loss processes vary from the current solar system paradigms. 4:45 p.m. Dong C. F. * Atmospheric Escape from M-Dwarf Exoplanets and Implications for Long-Term Climate Evolution and Habitability [#2053] We study the atmospheric escape from M-dwarf exoplanets (including Proxima b and seven Earth-sized planets in the TRAPPIST-1 system) and its implications for long-term climate evolution and habitability by using the state-of-the-art numerical tools. 5:00 p.m. Jakosky B. M. * [INVITED] Mars Climate and Volatile Evolution [#2072] Examination of the behavior of Mars climate and volatiles, starting from the annual behavior and building up to long-term evolution. 5:30 p.m. Poster Lightning Talks Each poster presenter will have an opportunity to present a one-minute introduction. Monday, August 27, 2018 POSTER SESSION 6:00–8:00 p.m. Great Room Nikolaidou T. N. Employing Ray-Tracing to Probe Mars Atmosphere [#2048] The study presents a novel experiment where the ray-tracing technique is utilized to retrieve information on Mars neutral atmosphere. Spatial and temporal properties of the martian atmosphere will be presented and compared to Earth’s. Rushby A. J. Domagal-Goldman S. D. Som S. M. Woffard A. Arney G. Hoehler T. Revisiting the Early Earth’s Methanogen Biosphere [#2040] We investigate the effect of a putative sediment-dwelling methenogen biosphere on the climate and atmospheric chemistry of the Archean using a coupled ecosystem-climate-photochemistry model, and discuss implications for paleoclimatology and biosignatures. Chandler C. O. Robinson T. D. Efficient Atmospheric Model Equilibrium Searching and Assessment [#2026] We present novel atmospheric model computational techniques, newly formulated metrics for analyzing model output quality, and we demonstrate our new approach through applications to both Super-Earth and Mini-Neptune exoplanets. Kochemasov G. G. Cyclonic Activities on Jupiter and Earth; Catastrophic Atmospheric Phenomena of the Wave Nature: El-Nino, Cyclones, Tornado [#2009] Cyclonic lay-outs on Earth and Jupiter are observed and compared, though they occupy different latitudinal zones of the planets. Catastrophic terrestrial cyclones are tied to the equatorial belt requiring diminishing mass and thus enhanced rotation. Guzewich S. D. Lustig-Yaeger J. Kopparapu R. Way M. J. The Impact of Planetary Rotation Rate on the Reflectance Spectrum of Terrestrial Exoplanets [#2022] We conduct general circulation model simulations with ROCKE3D to model terrestrial planet climate with varying rotation rates. We then evaluate how the reflectance spectrum of the planet changes using two radiative transfer codes.
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