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A Wunda-Full World? Carbon Dioxide Ice Deposits on Umbriel and Other Uranian Moons
Icarus 290 (2017) 1–13 Contents lists available at ScienceDirect Icarus journal homepage: www.elsevier.com/locate/icarus A Wunda-full world? Carbon dioxide ice deposits on Umbriel and other Uranian moons ∗ Michael M. Sori , Jonathan Bapst, Ali M. Bramson, Shane Byrne, Margaret E. Landis Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, USA a r t i c l e i n f o a b s t r a c t Article history: Carbon dioxide has been detected on the trailing hemispheres of several Uranian satellites, but the exact Received 22 June 2016 nature and distribution of the molecules remain unknown. One such satellite, Umbriel, has a prominent Revised 28 January 2017 high albedo annulus-shaped feature within the 131-km-diameter impact crater Wunda. We hypothesize Accepted 28 February 2017 that this feature is a solid deposit of CO ice. We combine thermal and ballistic transport modeling to Available online 2 March 2017 2 study the evolution of CO 2 molecules on the surface of Umbriel, a high-obliquity ( ∼98 °) body. Consid- ering processes such as sublimation and Jeans escape, we find that CO 2 ice migrates to low latitudes on geologically short (100s–1000 s of years) timescales. Crater morphology and location create a local cold trap inside Wunda, and the slopes of crater walls and a central peak explain the deposit’s annular shape. The high albedo and thermal inertia of CO 2 ice relative to regolith allows deposits 15-m-thick or greater to be stable over the age of the solar system. -
Aquarius Fact Sheet
Fact Sheet: 2019 Designer: Perry Submarine Builders (Florida) Construction: Victoria Machine Works (Texas); start: 1986 | complete: 1987 Estimated construction cost: $5.5M Operational Timeline: St. Croix Deployment: Deployment in Salt River Canyon, St. Croix: 1987 Owner: NOAA Operator: Farleigh Dickenson University Interim Period: Recovered: 1990 by the University of North Carolina Wilmington Refurbished: 1990-1993 at North Carolina State Ports, Wilmington, NC Owner: NOAA Operator: University of North Carolina Wilmington Florida Keys Deployment: Initial deployment on Conch Reef, Florida Keys: 1993 (baseplate deployed 1992) Recovered for refurbishment: 1996-1998 - Harbor Branch Oceanographic Institution, Ft. Pierce, FL Redeployment on Conch Reef, Florida Keys: 1998 – present Owner: NOAA: 1986-2014; Florida International University: 2014 – present Operator: FDU: 1987-1989; UNCW: 1990-2012; Florida International University: 2013 - present Aquarius Siting: Conch Reef, Florida Keys (Florida Keys National Marine Sanctuary): Distance From Islamorada shore base: 15.4 km (8.5 nm) Distance offshore: 9 km (5.4 nm) Hatch depth/storage depth: 14 m (46 fsw) 35 psi Depth of bottom directly below Aquarius: 18 m (60 fsw) (updated: 09.15.19) Habitat Specifications: Aquarius weight: 82-ton double-lock pressure vessel Baseplate weight: 120 tons Dimensions: 14-meters long by 3-meters in diameter (46 ft x 10 ft) Crew: 4 scientists and 2 technicians Amenities: kitchen facilities that include a microwave, instant hot water dispenser, refrigerator, sink, dining -
Peer Review Draft Synthesis and Assessment Product 4.2 Thresholds
1 Peer Review Draft 2 Synthesis and Assessment Product 4.2 3 Thresholds of Change in Ecosystems 4 Authors: Daniel B. Fagre (lead author), Colleen W. Charles, Craig 5 D. Allen, Charles Birkeland, F. Stuart Chapin, III, Peter M. 6 Groffman, Glenn R. Guntenspergen, Alan K. Knapp, A. David 7 McGuire, Patrick J. Mulholland, Debra P.C. Peters, Daniel D. 8 Roby, and George Sugihara 9 Contributing authors: Brandon T. Bestelmeyer, Julio L. 10 Betancourt, Jeffrey E. Herrick, and Douglas S. Kenney 11 U.S. Climate Change Science Program 12 Draft 5.0 SAP 4.2 9/26/2008 1 1 Table of Contents 2 Executive Summary............................................................................................................ 5 3 Introduction................................................................................................................... 5 4 Definitions.....................................................................................................................5 5 Development of Threshold Concepts............................................................................ 6 6 Principles of Thresholds ............................................................................................... 7 7 Case Studies.................................................................................................................. 8 8 Potential Management Responses............................................................................... 10 9 Recommendations...................................................................................................... -
March 21–25, 2016
FORTY-SEVENTH LUNAR AND PLANETARY SCIENCE CONFERENCE PROGRAM OF TECHNICAL SESSIONS MARCH 21–25, 2016 The Woodlands Waterway Marriott Hotel and Convention Center The Woodlands, Texas INSTITUTIONAL SUPPORT Universities Space Research Association Lunar and Planetary Institute National Aeronautics and Space Administration CONFERENCE CO-CHAIRS Stephen Mackwell, Lunar and Planetary Institute Eileen Stansbery, NASA Johnson Space Center PROGRAM COMMITTEE CHAIRS David Draper, NASA Johnson Space Center Walter Kiefer, Lunar and Planetary Institute PROGRAM COMMITTEE P. Doug Archer, NASA Johnson Space Center Nicolas LeCorvec, Lunar and Planetary Institute Katherine Bermingham, University of Maryland Yo Matsubara, Smithsonian Institute Janice Bishop, SETI and NASA Ames Research Center Francis McCubbin, NASA Johnson Space Center Jeremy Boyce, University of California, Los Angeles Andrew Needham, Carnegie Institution of Washington Lisa Danielson, NASA Johnson Space Center Lan-Anh Nguyen, NASA Johnson Space Center Deepak Dhingra, University of Idaho Paul Niles, NASA Johnson Space Center Stephen Elardo, Carnegie Institution of Washington Dorothy Oehler, NASA Johnson Space Center Marc Fries, NASA Johnson Space Center D. Alex Patthoff, Jet Propulsion Laboratory Cyrena Goodrich, Lunar and Planetary Institute Elizabeth Rampe, Aerodyne Industries, Jacobs JETS at John Gruener, NASA Johnson Space Center NASA Johnson Space Center Justin Hagerty, U.S. Geological Survey Carol Raymond, Jet Propulsion Laboratory Lindsay Hays, Jet Propulsion Laboratory Paul Schenk, -
GSA TODAY • Radon in Water, P
Vol. 8, No. 11 November 1998 INSIDE • Field Guide Editor, p. 5 GSA TODAY • Radon in Water, p. 10 • Women Geoscientists, p. 12 A Publication of the Geological Society of America • 1999 Annual Meeting, p. 31 Gas Hydrates: Greenhouse Nightmare? Energy Panacea or Pipe Dream? Bilal U. Haq, National Science Foundation, Division of Ocean Science, Arlington, VA 22230 ABSTRACT Recent interest in methane hydrates has resulted from the recognition that they may play important roles in the global carbon cycle and rapid climate change through emissions of methane from marine sediments and permafrost into the atmosphere, and in causing mass failure of sediments and structural changes on the continental slope. Their presumed large volumes are also consid- ered to be a potential source for future exploitation of methane as a resource. Natural gas hydrates occur widely on continental slope and rise, stabilized in place by high hydrostatic pressure and frigid bottom-temperature condi- tions. Change in these conditions, Figure 1. This seismic profile, over the landward side of Blake Ridge, crosses a salt diapir; the profile has either through lowering of sea level or been processed to show reflection strength. The prominent bottom simulating reflector (BSR) swings increase in bottom-water temperature, upward over the diapir because of the higher conductivity of the salt. Note the very strong reflections of may trigger the following sequence of gas accumulations below the gas-hydrate stability zone and the “blanking” of energy above it. Bright events: dissociation of the hydrate at its Spots along near-vertical faults above the diapir represent conduits for gas venting. -
Origin of the Solar System
Creation Myths The rise of the monotheistic religions changed this view. When one of the gods got a higher Old Myths status than others (who in some cases became Speculation about the origin and evolution of demons or devils), he continued to increase in the earth and the celestial bodies is probably as prestige and power until he became the Supreme old as human thinking. During the millennia that Lord, the undisputed ruler of the whole world. are covered by the history of science, philosphy, Then it was not enough for him to create the world and religion we can distinguish three types of ap in the sense of organizing a preexisting chaos; he proach to this problem. had to create it all from nothing (ex nihilo) by The first is the "theocratic-myth" approach, pronouncing a magic word or by his will power. according to which the evolution of the world was This is the meaning of "creation" when we use it governed by gods who once upon a time created today, but it is a relatively new concept. It was it. However, we must remember that the meaning generally accepted in Christianity in the second of "creation" has changed. The earliest meaning century A.D. but the Genesis description of the of this term seems to have been that the gods Creation seems to have either meaning. The crea brought order into a preexisting chaos. The world tion ex nihilo was not generally accepted by the was "ungenerated and indestructible"-as Aris philosophical-scientific community until the syn totle puts it-and the gods were part of this world thesis by St. -
ARIS Aboard the Aquarius ! Fabien Costeau’S Mission 31 Selects ARIS for Cutting Edge Ocean Research
SOUND METRICS CORP ARIS in Action: Volume 1, Issue 1 ! ARIS Aboard the Aquarius ! Fabien Costeau’s Mission 31 Selects ARIS for Cutting Edge Ocean Research Sound Metrics recently received the exciting opportunity to join Fabien Cousteau’s Mission 31 by providing ARIS and DIDSON sonars for a pioneering ocean research expedition aboard Aquarius, the underwater research lab operated by Florida !International University. Mission 31 was a groundbreaking underwater study led by Fabien Cousteau, grandson of Jacques Yves Cousteau, the famous French explorer who created the first marine living environments for humans and led the first successful Pictured above: An study on the ocean floor. Mission 31 celebrated the 50th anniversary of outside view of Jacques Yves Cousteau’s study while taking underwater research to the next Aquarius, and the ARIS Explorer 3000 level. For 31 days, Fabien and his team of students successfully undertook employed on the the longest underwater study ever recorded at 60 feet below the surface, one ocean floor day longer and at twice the depth of Jacques Yves Cousteau’s original mission, all the while broadcasting the mission’s daily activities 24/7 over multiple new media platforms to make their studies readily accessible to the !public. The mission began on June 1, 2014, as Fabien Cousteau and his team ARIS Aboard the Aquarius 1 SOUND METRICS CORP ARIS in Action: Volume 1, Issue 1 submerged for their month-long period of ocean research aboard Aquarius, the world’s only currently existing underwater laboratory. Located near the coral reefs in the Florida Keys National Marine Sanctuary and operated by Florida International University, the Aquarius allows for unparalleled up-close Pictured above: marine observation. -
Fabien Cousteau Ends Mission at Undersea Lab (Update) 2 July 2014
Fabien Cousteau ends mission at undersea lab (Update) 2 July 2014 The crew dove June 1 to Aquarius to study climate change and pollution on a nearby coral reef. Cousteau is scheduled to talk with reporters Wednesday afternoon. Five things to know about Cousteau's undersea mission Fabien Cousteau comes from a famous family of filmmakers, advocates and ocean explorers, and now he's added to their legacy of sea stories a 31-day expedition at an underwater laboratory in the Florida Keys. Here are five things to know about Cousteau's "Mission 31," which ended Wednesday. Fabien Cousteau reacts as he returns to the dock after THE AQUANAUTS 31 days undersea in the Aquarius Reef Base, Wednesday, July 2, 2014, in Islamorada, in the Florida The French oceanographer spent 31 days living Keys. Cousteau and his team of filmmakers and and working underwater at Aquarius Reef Base. scientists dove June 1 to study the effects of climate Filmmakers and researchers from Florida change and pollution on a nearby coral reef. (AP Photo/Lynne Sladky) International University, Northeastern University and MIT also joined him for two-week-long stretches during the expedition. After 31 days undersea, Cousteau stepped off a boat wearing flip-flops and a beach towel wrapped around his waist, saying he was torn about leaving his underwater home, but he missed his family and friends. The French oceanographer and his team of filmmakers and scientists started decompression Tuesday afternoon inside Aquarius Reef Base, 63 feet (19 meters) below the ocean's surface. Because they've spent so much time underwater, Cousteau and his "Mission 31" crew needed to undergo roughly 16 hours of decompression inside the school bus-sized lab so that they could return to the surface without suffering the bends. -
South Pole-Aitken Basin
Feasibility Assessment of All Science Concepts within South Pole-Aitken Basin INTRODUCTION While most of the NRC 2007 Science Concepts can be investigated across the Moon, this chapter will focus on specifically how they can be addressed in the South Pole-Aitken Basin (SPA). SPA is potentially the largest impact crater in the Solar System (Stuart-Alexander, 1978), and covers most of the central southern farside (see Fig. 8.1). SPA is both topographically and compositionally distinct from the rest of the Moon, as well as potentially being the oldest identifiable structure on the surface (e.g., Jolliff et al., 2003). Determining the age of SPA was explicitly cited by the National Research Council (2007) as their second priority out of 35 goals. A major finding of our study is that nearly all science goals can be addressed within SPA. As the lunar south pole has many engineering advantages over other locations (e.g., areas with enhanced illumination and little temperature variation, hydrogen deposits), it has been proposed as a site for a future human lunar outpost. If this were to be the case, SPA would be the closest major geologic feature, and thus the primary target for long-distance traverses from the outpost. Clark et al. (2008) described four long traverses from the center of SPA going to Olivine Hill (Pieters et al., 2001), Oppenheimer Basin, Mare Ingenii, and Schrödinger Basin, with a stop at the South Pole. This chapter will identify other potential sites for future exploration across SPA, highlighting sites with both great scientific potential and proximity to the lunar South Pole. -
Signature Redacted Signature of Author: Department of Earth, Atmospheric and Planetary Sciences August 1, 2014 Signature Redacted Certified By: Maria T
Judging a Planet by its Cover: Insights into Lunar Crustal Structure and Martian Climate History from Surface Features by MASSACHUSEr rS INTrrlJTE OF TECHN CLOGY Michael M. Sori 20RE B.S. in Mathematics, B.A. in Physics L C I Duke University, 2008 LIBRA RIES Submitted to the Department of Earth, Atmospheric and Planetary Sciences in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Planetary Science at the MASSACHUSETTS INSTITUTE OF TECHNOLOGY September 2014 2014 Massachusetts Institute of Technology. All rights reserved. Signature redacted Signature of Author: Department of Earth, Atmospheric and Planetary Sciences August 1, 2014 Signature redacted Certified by: Maria T. Zuber E. A. Griswold Professor of Geophysics & Vice President for Research Signature redacted Thesis Supervisor Accepted by: Robert D. van der Hilst Schlumberger Professor of Earth Sciences Head, Department of Earth, Atmospheric and Planetary Sciences 2 Judging a Planet by its Cover: Insights into Lunar Crustal Structure and Martian Climate History from Surface Features By Michael M Sori Submitted to the Department of Earth, Atmospheric and Planetary Sciences on June 3, 2014, in partial fulfillment of the requirements for the degree of Doctor of Philosophy Abstract Orbital spacecraft make observations of a planet's surface in the present day, but careful analyses of these data can yield information about deeper planetary structure and history. In this thesis, I use data sets from four orbital robotic spacecraft missions to answer longstanding questions about the crustal structure of the Moon and the climatic history of Mars. In chapter 2, I use gravity data from the Gravity Recovery and Interior Laboratory (GRAIL) mission to constrain the quantity and location of hidden volcanic deposits on the Moon. -
The Disintegration of the Wolf Creek Meteorite and the Formation of Pecoraite, the Nickel Analog of Clinochrysotile
The Disintegration of the Wolf Creek Meteorite and the Formation of Pecoraite, the Nickel Analog of Clinochrysotile GEOLOGICAL SURVEY PROFESSIONAL PAPER 384-C 1 mm ^^ 5 -fc;- Jj. -f->^ -J^' ' _." ^P^-Arvx^B^ »""*- 'S y^'ir'*'*'/?' trK* ^-7 A5*^v;'VvVr*'^**s! ^^^^V'^"^"''"X^^i^^?l^"%^ - ! ^ Pecoraite, Wolf Creek meteorite of Australia. Upper, Pecoraite grains separated by hand picking from crack fillings in the meteorite (X 25). Lower, Pecoraite grains lining the walls of some cracks in the meteorite. The extent of disintegration of the original metal lic phases into new phases, chiefly goethite and maghemite, is apparent (X 2.3). THE DISINTEGRATION OF THE WOLF CREEK METEORITE AND THE FORMATION OF PECORAITE, THE NICKEL ANALOG OF CLINOCHRYSOTILE The Disintegration of the Wolf Creek Meteorite and the Formation of Pecoraite, the Nickel Analog of Clinochrysotile By GEORGE T. FAUST, JOSEPH J. FAHEY, BRIAN H. MASON and EDWARD J. DWORNIK STUDIES OF THE NATURAL PHASES IN THE SYSTEM MgO-SiO2 -H2O AND THE SYSTEMS CONTAINING THE CONGENERS OF MAGNESIUM GEOLOGICAL SURVEY PROFESSIONAL PAPER 384-C Origin of pecoraite elucidated through its properties and in terms of the geochemical balance in its desert environment UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1973 UNITED STATES DEPARTMENT OF THE INTERIOR ROGERS C. B. MORTON, Secretary GEOLOGICAL SURVEY V. E. McKelvey, Director Library of Congress catalog-card No. 73-600160 For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C. 20402 - Price $1.30 Stock -
Workshop on Lunar Crater Observing and Sensing Satellite (LCROSS) Site Selection, P
WORKSHOP PROGRAM AND ABSTRACTS LPI Contribution No. 1327 WWWOOORRRKKKSSSHHHOOOPPP OOONNN LLLUUUNNNAAARRR CCCRRRAAATTTEEERRR OOOBBBSSSEEERRRVVVIIINNNGGG AAANNNDDD SSSEEENNNSSSIIINNNGGG SSSAAATTTEEELLLLLLIIITTTEEE (((LLLCCCRRROOOSSSSSS))) SSSIIITTTEEE SSSEEELLLEEECCCTTTIIIOOONNN OOOCCCTTTOOOBBBEEERRR 111666,,, 222000000666 NNNAAASSSAAA AAAMMMEEESSS RRREEESSSEEEAAARRRCCCHHH CCCEEENNNTTTEEERRR MMMOOOFFFFFFEEETTTTTT FFFIIIEEELLLDDD,,, CCCAAALLLIIIFFFOOORRRNNNIIIAAA SSSPPPOOONNNSSSOOORRRSSS LCROSS Mission Project NASA Ames Research Center Lunar and Planetary Institute National Aeronautics and Space Administration SSSCCCIIIEEENNNTTTIIIFFFIIICCC OOORRRGGGAAANNNIIIZZZIIINNNGGG CCCOOOMMMMMMIIITTTTTTEEEEEE Jennifer Heldmann (chair) NASA Ames Research Center/SETI Institute Geoff Briggs NASA Ames Research Center Tony Colaprete NASA Ames Research Center Don Korycansky University of California, Santa Cruz Pete Schultz Brown University Lunar and Planetary Institute 3600 Bay Area Boulevard Houston TX 77058-1113 LPI Contribution No. 1327 Compiled in 2006 by LUNAR AND PLANETARY INSTITUTE The Institute is operated by the Universities Space Research Association under Agreement No. NCC5-679 issued through the Solar System Exploration Division of the National Aeronautics and Space Administration. Any opinions, findings, and conclusions or recommendations expressed in this volume are those of the author(s) and do not necessarily reflect the views of the National Aeronautics and Space Administration. Material in this volume may be copied without restraint for