Juneau Icefield Research Program 2019 Faculty Information

Total Page:16

File Type:pdf, Size:1020Kb

Juneau Icefield Research Program 2019 Faculty Information Juneau Icefield Research Program 2019 Faculty Information Seth Campbell [email protected] 207-329-6014 (phone) Call or text anytime! Annie Boucher [email protected] 907-500-8913 (phone) 1 Introduction of Teaching Faculty Teaching Faculty: *Sarah Fortner – Environmental Geochemistry (Wittenberg University) *Lindsey Nicholson – Glaciology (University of Innsbruck) *Allen Pope – Glaciology (Remote Sensing) (NSIDC & IASC) *Kiya Riverman – Glaciology (Geophysics) (University of Oregon) *Brad Markle – Glaciology (Atmospheric Sciences) (Cal Tech) Key Point *Catharine White – Ecology (Microbiology) (Coast Mountain College) Chris McNeil – Glaciology (Mass Balance) (USGS) Near Peer Mentoring at all Jeremy Littell – Ecology (USGS) stages (Students, staff, junior Scott McGee – Glaciology (Geomatics) faculty, and senior faculty) Daniel Shapero – Glaciology (Modeling) (University of Washington – APL) Ben Huff – Artist (Photography) Carrie Jennings – Geomorphology (Freshwater Society & Minnesota DNR) Wilson Clayton – Glaciology (Mass Balance) (Colorado School of Mines) Donovan Dennis – Geomorphology Michaela King – Glaciology (Ohio State University) Elizabeth Case – Glaciology (Geophysics) (Columbia University) * Academic Council Members Hannah Mode – Artist (Fine Arts, Science Comms/Story Telling) Jay Ach – Geology (Port of San Francisco) Jay Fleisher - Geology & JIRP History (SUNY Oneonta) 2 Introduction of Research Faculty and Specific Projects Ecology/Remote Sensing Geomorphology Christine Foreman (Montana State University) Allie Balter (Columbia University) Marco Tedesco (Columbia University) Donovan Dennis (Potsdam) Seth Campbell (UMaine) Geophysics (Distributed Acoustic Sensing) Celeste Labedz (Cal Tech) Glacier Hydrology Elizabeth Case (Columbia) Geophysics (Seismo-Electric Test) Wilson Clayton (Colorado School of Mines) Kristin Poinar (University of Buffalo) Seth Campbell (UMaine) Erasmus Oware (University of Buffalo) Airborne Geophysics Ice Core Drill Test Lizz Ultee (MIT) Anna de Vitry (IDDO) Krissy Slawny (IDDO) Numerical Modeling - Icepack Grant Boeckmann (IDDO) Daniel Shapero (University of Washington – APL) 3 Purple Dots: Camps Primary Research Sites for 2019 Atlin Lake, BC Geophysics (Distributed Acoustic Sensing) Camp 26 Geophysics (Seismo-Electric Test) Camp 18 Airborne Geophysics 2018 Glacier Hydrology 2011 Ice Core Drill Test Camp 10 Geomorphology Icefall Camp Ecology/Remote Sensing Numerical Modeling - Icepack 2019 Camp 17 Juneau, AK 4 Ecology/Remote Sensing Christine Foreman, Montana State University Marco Tedesco, Lamont-Doherty Earth Observatory of Columbia University Geophysics (DAS and Seismoelectrical Tests) 6 Celeste, Kristin, and Erasmus Geophysics (Distributed Acoustic Sensing - DAS) 7 Celeste Geophysics (Seismo-Electric Method Test) Northeast Greenland Ice Stream • Farther inland than any other Greenland glacier • Lack of steep slope, basal channel, or low-resistance geology (e.g., Siple Coast ice streams) • Fast flow originates at a near point source: Odd! • Icelandic Hotspot passage at ~50 Myr • Has hydrothermal alteration of crustal materials, enhanced by the insulating effect of the ice sheet, allowed locally fast ice flow? Seismoelectric Method: Input: Active seismic source Shear waves induce electric current into any conductive media along the wave path Output: Unit measures BOTH the Seismic response Electric response 8 Kristin and Erasmus Ice Core Drill Test 9 Anna, Grant, and Krissy Geomorphology Key Points: Deglaciation, Erosion, and Tectonics Sketch: Kristin Link (2018) Collaborators: University of Maine Columbia University University of Vermont Cosmo-Lab Purdue Prime Lab Berkeley Geochronology Center Tulane University Potsdam Seth, Donovan, Allie Key Points: Deglaciation, Erosion, and Tectonics Geomorphology 11 Donovan Glacier Hydrology Monitoring and modelling meltwater flow Greenland’s perennial aquifer was identified in the late 2000s. It can hold up to 0.5 mm (12%) of today’s yearly sea level rise. An potential aquifer was identified on the JIF in 2018. Miège, C. et al. (2016). Two or three phase-sensitive radars will be deployed on the divide for 10-14 days, continuously, to monitor meltwater 푛푖푐푒 = 1.78 푛푤 = 8.85 Vankova, I. et al. (2018). An automatic weather station will collect information We can quantify the amount of water in the aquifer by looking at about the surface energy balance, which we can use in a the variation in the return signal of the radar. Radio waves move model to explore the likely structure of the firn aquifer. more slowly through water than ice, so water presence makes it look like the ice is stretching downwards. Elizabeth Meyer, C. R. & Hewitt, I. J. (2017). Airborne Geophysics 13 Lizz Chudley et al. 2018 Numerical Modeling https://icepack.github.io/index.html https://icepack.github.io/icepack.demo.04-ice-shelf-inverse.html 14 Daniel Academic Curriculum How do glaciers work? • Architecture of a Glaciers, Icefields, and Ice Sheets • Glacier Energy and Mass Balance • Glacier Dynamics • Glacier Hydrology How do glaciers relate to their surrounding environment? What other skills are critical for polar research? • Juneau Icefield Specific Glaciers • Sciences Skills • Glacier Change o Field Techniques • Glacial Geology, Geomorphology, and Geology/Tectonics o Quantitative Techniques • Climatology and Meteorology • Expeditionary Skills • Hydrology o Science Expedition Preparation and • Biosphere Planning o Ecology o Field Safety o Biogeochemistry o Glacier Mountaineering How do we study glaciers and surrounding environments? • Communication Skills • Geomatics o Science Communication • Geophysics o Science Policy • Geochemistry • Remote Sensing • Numerical Modeling Academic Curriculum Planning Teams Glaciology Geology and Geomorphology Research Members: Lindsey Nicholson Jay Ach Kristin Poinar Allen Pope Carrie Jennings Research Members: Erasmus Oware Kiya Riverman Donovan Dennis Seth Campbell Celeste Labedz Brad Markle Allie Balter Daniel Shapero Chris McNeil Jay Fleisher Anna de Vitry Scott McGee Lizz Ultee Wilson Clayton Art and Science Communications Seth Campbell Michaela King Hannah Mode Grant Boeckmann Elizabeth Case Ben Huff Sarah Fortner Ecology Cezanna Semnacher Elizabeth Case Research Members: Catharine White Christine Foreman Sarah Fortner NOTES: Email List for all faculty will be provided immediately after this Webinar; Marco Tedesco Allen Pope Please CC your working group team members when discussing curriculum. Jeremy Littell We can do follow-up individual webinars for each Curriculum Team if there are questions 16 Block Teaching Faculty Schedules Block 1 (Camp 17) Block 2 (Camp 10) Block 3 (Camp 18) Block 4 (Camp 18-Atlin-Juneau) (June 15 – July 3) (July 3 - July 22) (July 22 - August 3) (August 3 - August 11) Lindsey Nicholson Chris McNeil Wilson Clayton Hannah Mode Annie Boucher Scott McGee Donovan Dennis Allen Pope Jeremy Littell Daniel Shapero Michaela King Scott McGee Ben Huff Carrie Jennings Elizabeth Case Annie Boucher Jay Ach Catharine White Brad Markle ONE VOLUNTEER FROM BLOCK 3? Brad Markle Kiya Riverman Sarah Fortner Scott McGee Hannah Mode 17 Student Research Projects o Proposed Student Research Topics • Mass Balance • Geophysics • Atmospheric Sciences • Ecology • Geology/Geomorphology • Geomatics o Key Points • We need faculty working together through the duration of the season to make each student project a success • These topics should evolve each summer to reflect faculty and supported research on the icefield. • Synergy between Research Faculty, Teaching Faculty, and Students is needed. • What can students do to support research projects while also having an opportunity to present some of the research in Atlin, Juneau, and at a conference with research and teaching faculty? • This design can change and Academic Council is working on improvements (They welcome comments) 18 Code of Conduct • Backcountry safety • Safe and respectful work environment • Cooperation within the expedition • Commitment our host communities • Transparency • Substance free NOTE: We will provide a full copy that requires your signature before participation in the field. Forms – juneauicefield.org/2019/forms • Health History • Emergency Contact Required for all participants by June 1st • Dietary Preferences • Travel Plans • Research equipment weight + volume Research Equipment • Shipping to Juneau is significantly more expensive and time consuming than in the lower 48. • Shipping information: juneauicefield.org/faculty/shipping Other Agenda Items • Looking for one faculty member to stay from C18-Juneau (Block 4) • Research funds sooner rather than later to cover prep for field seasons • Invoices (Contact Annie) • Internet is minimal to none at JIRP-Juneau Headquarters (Eagle Valley Center) • AGU Abstracts for Students and Faculty Next Items • Email from Seth introducing Academic Team member email contact info • Webinar for each individual team • Communication from Academic Council 22.
Recommended publications
  • University Microfilms, Inc., Ann Arbor, Michigan GEOLOGY of the SCOTT GLACIER and WISCONSIN RANGE AREAS, CENTRAL TRANSANTARCTIC MOUNTAINS, ANTARCTICA
    This dissertation has been /»OOAOO m icrofilm ed exactly as received MINSHEW, Jr., Velon Haywood, 1939- GEOLOGY OF THE SCOTT GLACIER AND WISCONSIN RANGE AREAS, CENTRAL TRANSANTARCTIC MOUNTAINS, ANTARCTICA. The Ohio State University, Ph.D., 1967 Geology University Microfilms, Inc., Ann Arbor, Michigan GEOLOGY OF THE SCOTT GLACIER AND WISCONSIN RANGE AREAS, CENTRAL TRANSANTARCTIC MOUNTAINS, ANTARCTICA DISSERTATION Presented in Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy in the Graduate School of The Ohio State University by Velon Haywood Minshew, Jr. B.S., M.S, The Ohio State University 1967 Approved by -Adviser Department of Geology ACKNOWLEDGMENTS This report covers two field seasons in the central Trans- antarctic Mountains, During this time, the Mt, Weaver field party consisted of: George Doumani, leader and paleontologist; Larry Lackey, field assistant; Courtney Skinner, field assistant. The Wisconsin Range party was composed of: Gunter Faure, leader and geochronologist; John Mercer, glacial geologist; John Murtaugh, igneous petrclogist; James Teller, field assistant; Courtney Skinner, field assistant; Harry Gair, visiting strati- grapher. The author served as a stratigrapher with both expedi­ tions . Various members of the staff of the Department of Geology, The Ohio State University, as well as some specialists from the outside were consulted in the laboratory studies for the pre­ paration of this report. Dr. George E. Moore supervised the petrographic work and critically reviewed the manuscript. Dr. J. M. Schopf examined the coal and plant fossils, and provided information concerning their age and environmental significance. Drs. Richard P. Goldthwait and Colin B. B. Bull spent time with the author discussing the late Paleozoic glacial deposits, and reviewed portions of the manuscript.
    [Show full text]
  • Project ICEFLOW
    ICEFLOW: short-term movements in the Cryosphere Bas Altena Department of Geosciences, University of Oslo. now at: Institute for Marine and Atmospheric research, Utrecht University. Bas Altena, project Iceflow geometric properties from optical remote sensing Bas Altena, project Iceflow Sentinel-2 Fast flow through icefall [published] Ensemble matching of repeat satellite images applied to measure fast-changing ice flow, verified with mountain climber trajectories on Khumbu icefall, Mount Everest. Journal of Glaciology. [outreach] see also ESA Sentinel Online: Copernicus Sentinel-2 monitors glacier icefall, helping climbers ascend Mount Everest Bas Altena, project Iceflow Sentinel-2 Fast flow through icefall 0 1 2 km glacier surface speed [meter/day] Khumbu Glacier 0.2 0.4 0.6 0.8 1.0 1.2 Mt. Everest 300 1800 1200 600 0 2/4 right 0 5/4 4/4 left 4/4 2/4 R 3/4 L -300 terrain slope [deg] Nuptse surface velocity contours Western Chm interval per 1/4 [meter/day] 10◦ 20◦ 30◦ 40◦ [outreach] see also Adventure Mountain: Mount Everest: The way the Khumbu Icefall flows Bas Altena, project Iceflow Sentinel-2 Fast flow through icefall ∆H Ut=2000 U t=2020 H internal velocity profile icefall α 2A @H 3 U = − 3+2 H tan αρgH @x MSc thesis research at Wageningen University Bas Altena, project Iceflow Quantifying precision in velocity products 557 200 557 600 7 666 200 NCC 7 666 000 score 1 7 665 800 Θ 0.5 0 7 665 600 557 460 557 480 557 500 557 520 7 665 800 search space zoom in template/chip correlation surface 7 666 200 7 666 200 7 666 000 7 666 000 7 665 800 7 665 800 7 665 600 7 665 600 557 200 557 600 557 200 557 600 [submitted] Dispersion estimation of remotely sensed glacier displacements for better error propagation.
    [Show full text]
  • List of Place-Names in Antarctica Introduced by Poland in 1978-1990
    POLISH POLAR RESEARCH 13 3-4 273-302 1992 List of place-names in Antarctica introduced by Poland in 1978-1990 The place-names listed here in alphabetical order, have been introduced to the areas of King George Island and parts of Nelson Island (West Antarctica), and the surroundings of A. B. Dobrowolski Station at Bunger Hills (East Antarctica) as the result of Polish activities in these regions during the period of 1977-1990. The place-names connected with the activities of the Polish H. Arctowski Station have been* published by Birkenmajer (1980, 1984) and Tokarski (1981). Some of them were used on the Polish maps: 1:50,000 Admiralty Bay and 1:5,000 Lions Rump. The sheet reference is to the maps 1:200,000 scale, British Antarctic Territory, South Shetland Islands, published in 1968: King George Island (sheet W 62 58) and Bridgeman Island (Sheet W 62 56). The place-names connected with the activities of the Polish A. B. Dobrowolski Station have been published by Battke (1985) and used on the map 1:5,000 Antarctic Territory — Bunger Oasis. Agat Point. 6211'30" S, 58'26" W (King George Island) Small basaltic promontory with numerous agates (hence the name), immediately north of Staszek Cove. Admiralty Bay. Sheet W 62 58. Polish name: Przylądek Agat (Birkenmajer, 1980) Ambona. 62"09'30" S, 58°29' W (King George Island) Small rock ledge, 85 m a. s. 1. {ambona, Pol. = pulpit), above Arctowski Station, Admiralty Bay, Sheet W 62 58 (Birkenmajer, 1980). Andrzej Ridge. 62"02' S, 58° 13' W (King George Island) Ridge in Rose Peak massif, Arctowski Mountains.
    [Show full text]
  • P1616 Text-Only PDF File
    A Geologic Guide to Wrangell–Saint Elias National Park and Preserve, Alaska A Tectonic Collage of Northbound Terranes By Gary R. Winkler1 With contributions by Edward M. MacKevett, Jr.,2 George Plafker,3 Donald H. Richter,4 Danny S. Rosenkrans,5 and Henry R. Schmoll1 Introduction region—his explorations of Malaspina Glacier and Mt. St. Elias—characterized the vast mountains and glaciers whose realms he invaded with a sense of astonishment. His descrip­ Wrangell–Saint Elias National Park and Preserve (fig. tions are filled with superlatives. In the ensuing 100+ years, 6), the largest unit in the U.S. National Park System, earth scientists have learned much more about the geologic encompasses nearly 13.2 million acres of geological won­ evolution of the parklands, but the possibility of astonishment derments. Furthermore, its geologic makeup is shared with still is with us as we unravel the results of continuing tectonic contiguous Tetlin National Wildlife Refuge in Alaska, Kluane processes along the south-central Alaska continental margin. National Park and Game Sanctuary in the Yukon Territory, the Russell’s superlatives are justified: Wrangell–Saint Elias Alsek-Tatshenshini Provincial Park in British Columbia, the is, indeed, an awesome collage of geologic terranes. Most Cordova district of Chugach National Forest and the Yakutat wonderful has been the continuing discovery that the disparate district of Tongass National Forest, and Glacier Bay National terranes are, like us, invaders of a sort with unique trajectories Park and Preserve at the north end of Alaska’s panhan­ and timelines marking their northward journeys to arrive in dle—shared landscapes of awesome dimensions and classic today’s parklands.
    [Show full text]
  • Of the Tasman Glacier
    1 ICE DYNAMICS OF THE HAUPAPA/TASMAN GLACIER MEASURED AT HIGH SPATIAL AND TEMPORAL RESOLUTION, AORAKI/MOUNT COOK, NEW ZEALAND A THESIS Presented to the School of Geography, Environment and Earth Sciences Victoria University of Wellington In Partial Fulfilment of the Requirements for the Degree of MASTERS OF SCIENCE By Edmond Anderson Lui, B.Sc., GradDipEnvLaw Wellington, New Zealand October, 2016 2 TABLE OF CONTENTS SIGNATURE PAGE .................................................................................................................... TITLE PAGE ............................................................................................................................................... 1 TABLE OF CONTENTS .......................................................................................................................... 2 LIST OF FIGURES ..................................................................................................................................... 5 LIST OF TABLES ....................................................................................................................................... 9 LIST OF EQUATIONS ...........................................................................................................................10 ACKNOWLEDGEMENTS ....................................................................................................................11 MOTIVATIONS ........................................................................................................................................12
    [Show full text]
  • A Geomorphic Classification System
    A Geomorphic Classification System U.S.D.A. Forest Service Geomorphology Working Group Haskins, Donald M.1, Correll, Cynthia S.2, Foster, Richard A.3, Chatoian, John M.4, Fincher, James M.5, Strenger, Steven 6, Keys, James E. Jr.7, Maxwell, James R.8 and King, Thomas 9 February 1998 Version 1.4 1 Forest Geologist, Shasta-Trinity National Forests, Pacific Southwest Region, Redding, CA; 2 Soil Scientist, Range Staff, Washington Office, Prineville, OR; 3 Area Soil Scientist, Chatham Area, Tongass National Forest, Alaska Region, Sitka, AK; 4 Regional Geologist, Pacific Southwest Region, San Francisco, CA; 5 Integrated Resource Inventory Program Manager, Alaska Region, Juneau, AK; 6 Supervisory Soil Scientist, Southwest Region, Albuquerque, NM; 7 Interagency Liaison for Washington Office ECOMAP Group, Southern Region, Atlanta, GA; 8 Water Program Leader, Rocky Mountain Region, Golden, CO; and 9 Geology Program Manager, Washington Office, Washington, DC. A Geomorphic Classification System 1 Table of Contents Abstract .......................................................................................................................................... 5 I. INTRODUCTION................................................................................................................. 6 History of Classification Efforts in the Forest Service ............................................................... 6 History of Development .............................................................................................................. 7 Goals
    [Show full text]
  • 1953 the Mountaineers, Inc
    fllie M®��1f�l]�r;r;m Published by Seattle, Washington..., 'December15, 1953 THE MOUNTAINEERS, INC. ITS OBJECT To explore and study the mountains, forests, and water cours­ es of the Northwest; to gather into permanent form the history and traditions of this region; to preserve by encouragement of protective legislation or otherwise, the natural beauty of North­ west America; to make expeditions into these regions in ful­ fillment of the above purposes ; to encourage a spirit of good fellowship among all lovers of out-door life. THE MOUNTAINEER LIBRARY The Club's library is one of the largest mountaineering col­ lections in the country. Books, periodicals, and pamphlets from many parts of the world are assembled for the interested reader. Mountaineering and skiing make up the largest part of the col­ lection, but travel, photography, nature study, and other allied subjects are well represented. After the period 1915 to 1926 in which The Mountaineers received books from the Bureau of Associate Mountaineering Clubs of North America, the Board of Trustees has continuously appropriated money for the main­ tenance and expansion of the library. The map collection is a valued source of information not only for planning trips and climbs, but for studying problems in other areas. NOTICE TO AUTHORS AND COMMUNICATORS Manuscripts offered for publication should be accurately typed on one side only of good, white, bond paper 81f2xll inches in size. Drawings or photographs that are intended for use as illustrations should be kept separate from the manuscript, not inserted in it, but should be transmitted at the same time.
    [Show full text]
  • White Glacier 2014, Axel Heiberg Island, Nunavut: Mapped Using Structure from Motion Methods
    Journal of Maps ISSN: (Print) 1744-5647 (Online) Journal homepage: http://www.tandfonline.com/loi/tjom20 White Glacier 2014, Axel Heiberg Island, Nunavut: mapped using Structure from Motion methods Laura Thomson & Luke Copland To cite this article: Laura Thomson & Luke Copland (2016) White Glacier 2014, Axel Heiberg Island, Nunavut: mapped using Structure from Motion methods, Journal of Maps, 12:5, 1063-1071, DOI: 10.1080/17445647.2015.1124057 To link to this article: http://dx.doi.org/10.1080/17445647.2015.1124057 View supplementary material Published online: 08 Jan 2016. Submit your article to this journal Article views: 88 View related articles View Crossmark data Full Terms & Conditions of access and use can be found at http://www.tandfonline.com/action/journalInformation?journalCode=tjom20 Download by: [University of Ottawa] Date: 22 November 2016, At: 19:04 JOURNAL OF MAPS, 2016 VOL. 12, NO. 5, 1063–1071 http://dx.doi.org/10.1080/17445647.2015.1124057 SCIENCE White Glacier 2014, Axel Heiberg Island, Nunavut: mapped using Structure from Motion methods Laura Thomson and Luke Copland Department of Geography, University of Ottawa, Ottawa, Canada ABSTRACT ARTICLE HISTORY We use Structure from Motion software to generate a new digital elevation model (DEM) of Received 14 June 2015 White Glacier, Axel Heiberg Island, Nunavut, using >400 oblique aerial photographs collected Revised 10 November 2015 in July 2014. Spatially and radiometrically high-resolution imagery, optimized camera Accepted 20 November 2015 settings, low angle lighting conditions, and photo post-processing methods together KEYWORDS supported the detection of small but distinct features on the surface of the snowpack and Structure from Motion; enabled feature matching during the image correlation process.
    [Show full text]
  • The Effect of Glacier Recession on Benthic and Pelagic
    Journal of Marine Science and Engineering Communication The Effect of Glacier Recession on Benthic and Pelagic Communities: Case Study in Herve Cove, Antarctica Marta Potocka 1,* , Anna Kidawa 1, Anna Panasiuk 2, Luiza Bielecka 3, Justyna Wawrzynek-Borejko 3, Weronika Patuła 3, Kornelia A. Wójcik 1, Joanna Plenzler 1, Tomasz Janecki 4 and Robert J. Bialik 1 1 Department of Antarctic Biology, Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawinskiego St. 5a, 02-106 Warsaw, Poland 2 Department of Marine Plankton Research, Institute of Oceanography, Faculty of Oceanography and Geography, University of Gda´nsk,Av. Marszalka Pilsudskiego 46, 81-378 Gdynia, Poland 3 Department of Marine Ecosystems Functioning, Institute of Oceanography, Faculty of Oceanography and Geography, University of Gda´nsk,Av. Marszalka Pilsudskiego 46, 81-378 Gdynia, Poland 4 Nencki Institute of Experimental Biology, Polish Academy of Sciences, Pasteura St. 3, 02-093 Warsaw, Poland * Correspondence: [email protected] Received: 29 June 2019; Accepted: 21 August 2019; Published: 24 August 2019 Abstract: Changes in macrobenthic and pelagic communities in the postglacial, partially isolated, lagoon Herve Cove in Admiralty Bay, King George Island, were investigated 15 years after the first comprehensive studies had been conducted in this region. The bottom area of the cove has enlarged from approximately 12 ha to 19 ha after the retreat of the Dera Icefall. Based on a photographic survey of the benthos and taxonomic composition of zooplankton, ecological succession and the colonization of new species have been observed. Several new species occur such as gastropods, seastars, sea urchins and isopods, and their presence in different parts of the cove, as well as breeding aggregations suggests that they reproduce there.
    [Show full text]
  • Coastal-Change and Glaciological Map of the Ronne Ice Shelf Area, Antarctica: 1974–2002
    U.S. DEPARTMENT OF THE INTERIOR TO ACCOMPANY MAP I–2600–D U.S. GEOLOGICAL SURVEY COASTAL-CHANGE AND GLACIOLOGICAL MAP OF THE RONNE ICE SHELF AREA, ANTARCTICA: 1974–2002 By Jane G. Ferrigno,1 Kevin M. Foley,1 Charles Swithinbank,2 Richard S. Williams, Jr.,3 and Lina M. Dailide1 2005 INTRODUCTION fronts of Antarctica (Swithinbank, 1988; Williams and Ferrigno, 1988). The project was later modified to include Landsat 4 and Background 5 MSS and Thematic Mapper (TM) (and in some areas Landsat 7 Changes in the area and volume of polar ice sheets are Enhanced Thematic Mapper Plus (ETM+)), RADARSAT images, intricately linked to changes in global climate, and the resulting and other data where available, to compare changes during a changes in sea level may severely impact the densely populated 20- to 25- or 30-year time interval (or longer where data were coastal regions on Earth. Melting of the West Antarctic part available, as in the Antarctic Peninsula). The results of the analy- alone of the Antarctic ice sheet could cause a sea-level rise of sis are being used to produce a digital database and a series of approximately 6 meters (m). The potential sea-level rise after USGS Geologic Investigations Series Maps (I–2600) consisting of melting of the entire Antarctic ice sheet is estimated to be 65 23 maps at 1:1,000,000 scale and 1 map at 1:5,000,000 scale, m (Lythe and others, 2001) to 73 m (Williams and Hall, 1993). in both paper and digital format (Williams and others, 1995; In spite of its importance, the mass balance (the net volumetric Williams and Ferrigno, 1998; Ferrigno and others, 2002) (avail- gain or loss) of the Antarctic ice sheet is poorly known; it is not able online at http://www.glaciers.er.usgs.gov).
    [Show full text]
  • GLACIERS of ALASKA by BRUCE F
    Glaciers of North America— GLACIERS OF ALASKA By BRUCE F. MOLNIA With sections on COLUMBIA AND HUBBARD TIDEWATER GLACIERS By ROBERT M. KRIMMEL THE 1986 AND 2002 TEMPORARY CLOSURES OF RUSSELL FIORD BY THE HUBBARD GLACIER By BRUCE F. MOLNIA, DENNIS C. TRABANT, ROD S. MARCH, and ROBERT M. KRIMMEL GEOSPATIAL INVENTORY AND ANALYSIS OF GLACIERS: A CASE STUDY FOR THE EASTERN ALASKA RANGE By WILLIAM F. MANLEY SATELLITE IMAGE ATLAS OF THE GLACIERS OF THE WORLD Edited by RICHARD S. WILLIAMS, Jr., and JANE G. FERRIGNO U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1386–K About 5 percent (about 75,000 km2) of Alaska is presently glacierized, including 11 mountain ranges, 1 large island, an island chain, and 1 archipelago. The total number of glaciers in Alaska is estimated at >100,000, including many active and former tidewater glaciers. Glaciers in every mountain range and island group are experiencing significant retreat, thinning, and (or) stagnation, especially those at lower elevations, a process that began by the middle of the 19th century. In southeastern Alaska and western Canada, 205 glaciers have a history of surging; in the same region, at least 53 present and 7 former large ice-dammed lakes have produced jökulhlaups (glacier-outburst floods). Ice-capped Alaska volcanoes also have the potential for jökulhlaups caused by subglacier volcanic and geothermal activity. Satellite remote sensing provides the only practical means of monitoring regional changes in glaciers in response to short- and long-term changes in the maritime and continental climates of Alaska. Geospatial analysis is used to define selected glaciological parameters in the eastern part of the Alaska Range.
    [Show full text]
  • Flow and Structure in a Dendritic Glacier with Bedrock Steps
    Journal of Glaciology (2017), 63(241) 912–928 doi: 10.1017/jog.2017.58 © The Author(s) 2017. This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons. org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited. Flow and structure in a dendritic glacier with bedrock steps HESTER JISKOOT,1 THOMAS A FOX,1 WESLEY VAN WYCHEN1,2 1Department of Geography, University of Lethbridge, Lethbridge, AB, Canada 2Department of Geography, Environment and Geomatics, University of Ottawa, Ottawa, ON, Canada Correspondence: Hester Jiskoot <[email protected]> ABSTRACT. We analyse ice flow and structural glaciology of Shackleton Glacier, a dendritic glacier with multiple icefalls in the Canadian Rockies. A major tributary-trunk junction allows us to investigate the potential of tributaries to alter trunk flow and structure, and the formation of bedrock steps at con- fluences. Multi-year velocity-stake data and structural glaciology up-glacier from the junction were assimilated with glacier-wide velocity derived from Radarsat-2 speckle tracking. Maximum flow − − speeds are 65 m a 1 in the trunk and 175 m a 1 in icefalls. Field and remote-sensing velocities are in good agreement, except where velocity gradients are high. Although compression occurs in the trunk up-glacier of the tributary entrance, glacier flux is steady state because flow speed increases at the junc- tion due to the funnelling of trunk ice towards an icefall related to a bedrock step. Drawing on a pub- lished erosion model, we relate the heights of the step and the hanging valley to the relative fluxes of the tributary and trunk.
    [Show full text]