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Multi-Year Record of Atmospheric Mercury at Dumont D'urville, East Antarctic Coast: Continental Outflow and Oceanic Influences
Atmos. Chem. Phys. Discuss., doi:10.5194/acp-2016-257, 2016 Manuscript under review for journal Atmos. Chem. Phys. Published: 1 April 2016 c Author(s) 2016. CC-BY 3.0 License. 1 Multi-year record of atmospheric mercury at Dumont 2 d’Urville, East Antarctic coast: continental outflow and 3 oceanic influences 4 5 Hélène Angot 1, Iris Dion 1, Nicolas Vogel 1, Michel Legrand 1, 2 , Olivier Magand 2, 1, 6 Aurélien Dommergue 1, 2 7 1Univ. Grenoble Alpes, Laboratoire de Glaciologie et Géophysique de l’Environnement 8 (LGGE), 38041 Grenoble, France 9 2CNRS, Laboratoire de Glaciologie et Géophysique de l’Environnement (LGGE), 38041 10 Grenoble, France 11 Correspondence to: A. Dommergue ([email protected]) 12 13 Abstract 14 Under the framework of the Global Mercury Observation System (GMOS) project, a 3.5-year 15 record of atmospheric gaseous elemental mercury (Hg(0)) has been gathered at Dumont 16 d’Urville (DDU, 66°40’S, 140°01’E, 43 m above sea level) on the East Antarctic coast. 17 Additionally, surface snow samples were collected in February 2009 during a traverse 18 between Concordia Station located on the East Antarctic plateau and DDU. The record of 19 atmospheric Hg(0) at DDU reveals particularities that are not seen at other coastal sites: a 20 gradual decrease of concentrations over the course of winter, and a daily maximum 21 concentration around midday in summer. Additionally, total mercury concentrations in 22 surface snow samples were particularly elevated near DDU (up to 194.4 ng L-1) as compared 23 to measurements at other coastal Antarctic sites. -
Local Topography Increasingly Influences the Mass Balance of A
Local topography increasingly influences the mass balance of a retreating cirque glacier Caitlyn Florentine1, 2, Joel Harper2, Daniel Fagre1, Johnnie Moore2, Erich Peitzsch1 1U.S. Geological Survey, Northern Rocky Mountain Science Center, West Glacier, Montana, 59936, USA 5 2Department of Geosciences, University of Montana, Missoula, Montana, 59801, USA Correspondence to: Caitlyn Florentine ([email protected]) Abstract. Local topographically driven processes, such as wind drifting, avalanching, and shading, are known to alter the relationship between the mass balance of small cirque glaciers and regional climate. Yet partitioning such local effects from regional climate influence has proven difficult, creating uncertainty in the climate representativeness of some glaciers. We 10 address this problem for Sperry Glacier in Glacier National Park, USA using field-measured surface mass balance, geodetic constraints on mass balance, and regional climate data recorded at a network of meteorological and snow stations. Geodetically derived mass changes between 1950-1960, 1960-2005, and 2005-2014 document average mass change rates during each period at -0.22±0.12 m w.e. yr-1, -0.18±0.05 m w.e. yr-1, and -0.10±0.03 m w.e. yr-1. A correlation of field- measured mass balance and regional climate variables closely (i.e. within 0.08 m w.e. yr-1) predicts the geodetically 15 measured mass loss from 2005-2014. However, this correlation overestimates glacier mass balance for 1950-1960 by +1.18±0.92 m w.e. yr-1. Our analysis suggests that local effects, not represented in regional climate variables, have become a more dominant driver of the net mass balance as the glacier lost 0.50 km2 and retreated further into its cirque. -
Characteristics of the Bergschrund of an Avalanche-Cone Glacier in the Canadian Rocky Mountains
JOlIl"lla/ o/G/aci%gl'. VoL 29. No. 10 1. 1983 CHARACTERISTICS OF THE BERGSCHRUND OF AN AVALANCHE-CONE GLACIER IN THE CANADIAN ROCKY MOUNTAINS By G ERALD OSBORN (Department of Geology and Geophysics, Uni versity o f Calgary, Calgary, Alberta T2N I N4, Canada) ABSTRACT. Fi eld study of th e bergschrund of a small avalanche-cone glacier at the base of Mt Chephren, in Banff Nati onal Park , has been ca rried out as part of a general ex pl oratory study of glacier-head crevasses in th e Canadi an Roc ki es. The bergsc hrun d consists of a wide. shall ow. partl y bedrock-fl oored gap, und erneath whi ch ex tends a nearl y vertical Ralldklu!I, and a small , offset, subsidi ary crevasse (or crevasses). The fo ll owin g observations rega rdin g the behavior of th e bergsc hruncl and ice adjacent to it are of parti cul ar interest: ( I) topograph y of the subglaeial bedrock is a control on the location of the main bergschrund and subsidi a ry crevasses. (2) th e main bergschrund and subsid ia ry crevasse(s) are conn ected by subglacial gaps betwee n bedrock and ice; th e gaps are part of th e "bergschrund system" , (3) snow/ ice immedi ately down-glacier of the bergschrund system moves nea rl y verticall y dow nwa rd in response to rotational fl ow of the glacier. a ll owin g the bergschrund components to keep the same location and size fro m year to year, (4) an inde pend ent accumul ati on, fl ow. -
Reconstructions of Antarctic Topography Since the Eocene–Oligocene T Boundary ⁎ Guy J.G
Palaeogeography, Palaeoclimatology, Palaeoecology 535 (2019) 109346 Contents lists available at ScienceDirect Palaeogeography, Palaeoclimatology, Palaeoecology journal homepage: www.elsevier.com/locate/palaeo Reconstructions of Antarctic topography since the Eocene–Oligocene T boundary ⁎ Guy J.G. Paxmana, , Stewart S.R. Jamiesona, Katharina Hochmuthb,c, Karsten Gohlb, Michael J. Bentleya, German Leitchenkovd,e, Fausto Ferracciolif a Department of Geography, Durham University, Durham, UK b Alfred Wegener Institute Helmholtz-Center for Polar and Marine Sciences, Bremerhaven, Germany c School of Geography, Geology and the Environment, University of Leicester, Leicester, UK d Institute for Geology and Mineral Resources of the World Ocean, St. Petersburg, Russia e Institute of Earth Sciences, St. Petersburg State University, St. Petersburg, Russia f British Antarctic Survey, Cambridge, UK ABSTRACT Accurate models of past Antarctic ice sheet behaviour require realistic reconstructions of the evolution of bedrock topography. However, other than a preliminary attempt to reconstruct Antarctic topography at the Eocene–Oligocene boundary, the long-term evolution of Antarctica's subglacial topography throughout its glacial history has not previously been quantified. Here, we derive new reconstructions of Antarctic topography for four key time slices in Antarctica's climate andglacial history: the Eocene–Oligocene boundary (ca. 34 Ma), the Oligocene–Miocene boundary (ca. 23 Ma), the mid-Miocene climate transition (ca. 14 Ma), and the mid- Pliocene warm period (ca. 3.5 Ma). To reconstruct past topography, we consider a series of processes including ice sheet loading, volcanism, thermal subsidence, horizontal plate motion, erosion, sedimentation and flexural isostatic adjustment, and validate our models where possible using onshore and offshore geological constraints. Our reconstructions show that the land area of Antarctica situated above sea level was ~25% larger at the Eocene–Oligocene boundary than at the present-day. -
Geomorphic Character, Age and Distribution of Rock Glaciers in the Olympic Mountains, Washington
Portland State University PDXScholar Dissertations and Theses Dissertations and Theses 1987 Geomorphic character, age and distribution of rock glaciers in the Olympic Mountains, Washington Steven Paul Welter Portland State University Follow this and additional works at: https://pdxscholar.library.pdx.edu/open_access_etds Part of the Geology Commons, and the Geomorphology Commons Let us know how access to this document benefits ou.y Recommended Citation Welter, Steven Paul, "Geomorphic character, age and distribution of rock glaciers in the Olympic Mountains, Washington" (1987). Dissertations and Theses. Paper 3558. https://doi.org/10.15760/etd.5440 This Thesis is brought to you for free and open access. It has been accepted for inclusion in Dissertations and Theses by an authorized administrator of PDXScholar. For more information, please contact [email protected]. AN ABSTRACT OF THE THESIS OF Steven Paul Welter for the Master of Science in Geography presented August 7, 1987. Title: The Geomorphic Character, Age, and Distribution of Rock Glaciers in the Olympic Mountains, Washington APPROVED BY MEMBERS OF THE THESIS COMMITTEE: Rock glaciers are tongue-shaped or lobate masses of rock debris which occur below cliffs and talus in many alpine regions. They are best developed in continental alpine climates where it is cold enough to preserve a core or matrix of ice within the rock mass but insufficiently snowy to produce true glaciers. Previous reports have identified and briefly described several rock glaciers in the Olympic Mountains, Washington {Long 1975a, pp. 39-41; Nebert 1984), but no detailed integrative study has been made regarding the geomorphic character, age, 2 and distribution of these features. -
Geology of Hyder and Vicinity Southeastern Alaska
DEPARTMENT OF THE INTERIOR Roy O. West, Secretary U. S. GEOLOGICAL SURVEY George Otis Smith, Director Bulletin 807 GEOLOGY OF HYDER AND VICINITY SOUTHEASTERN ALASKA WITH A RECONNAISSANCE OF CHICKAMIN RIVER BY A. F. RUDDINGTON UNITED STATES GOVERNMENT PRINTING OFFICE WASHINGTON : 1&29 ADDITIONAL COPIES OF THIS PUBLICATION MAY BE PROCURED FROM THE SUPERINTENDENT OF DOCUMENTS TJ.S.OOVERNMENT PRINTING OFFICE WASHINGTON, D. C. AT 35 CENTS PER COPY CONTENTS Page Foreword, by Philip S. Smith._________________________ vn Introduction...____________________________________________________ 1 Field work_.._.___._.______..____...____. -_-__-. .. 1 Acknowledgments. _-_-________-_-___-___-__--_____-__-- -____-_ 2 History._________________________________________________________ 2 Bibliography ________-______ _____________._-__.-___-__--__--_--_-_ 3 Alaska.__-___-__---______-_-____-_-___--____-___-_-___-__-___ & British Columbia____-_____-___-___________-_-___--___.._____- 4 Geography_______________________________________-____--___-__--_ 4 Location and transportation facilities.___________________________ 4 Climate. __--______-______.____--__---____-_______--._--.--__- 5 Vegetation ___________________________________________________ 6 Water power._--___._____.________.______-_.._____-___.-_____ 7 Topography-___________--____-_-___--____.___-___-----__--_-- 7 General features of the relief----______-_---___-__------_-_-_ 7 Streams.._ _______________________________________________ 9 Glaciation.. _ __-_____-__--__--_____-__---_____-__--_----__ 10 Geology.... __----_-._ -._---_--__-.- _-_____-_____-___-_ 13 General features___-_-____-__-__-___-..____--___-_-____--__-._ 13 Hazelton group._....._.._>___-_-.__-______----_-----'_-__-..-- 17 General character.-----.-------.-------------------------- 17 Greenstone and associated rocks.._______.__.-.--__--_--_--_ 18 Graywacke-slate division.._________-_-__--_-_-----_--_----_ 19 Coast.Range intrusives__________-__-__--___-----------_-----_- 22 Texas Creek batholith and associated dikes..__--__.__-__-__-. -
Antarctica: Music, Sounds and Cultural Connections
Antarctica Music, sounds and cultural connections Antarctica Music, sounds and cultural connections Edited by Bernadette Hince, Rupert Summerson and Arnan Wiesel Published by ANU Press The Australian National University Acton ACT 2601, Australia Email: [email protected] This title is also available online at http://press.anu.edu.au National Library of Australia Cataloguing-in-Publication entry Title: Antarctica - music, sounds and cultural connections / edited by Bernadette Hince, Rupert Summerson, Arnan Wiesel. ISBN: 9781925022285 (paperback) 9781925022292 (ebook) Subjects: Australasian Antarctic Expedition (1911-1914)--Centennial celebrations, etc. Music festivals--Australian Capital Territory--Canberra. Antarctica--Discovery and exploration--Australian--Congresses. Antarctica--Songs and music--Congresses. Other Creators/Contributors: Hince, B. (Bernadette), editor. Summerson, Rupert, editor. Wiesel, Arnan, editor. Australian National University School of Music. Antarctica - music, sounds and cultural connections (2011 : Australian National University). Dewey Number: 780.789471 All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying or otherwise, without the prior permission of the publisher. Cover design and layout by ANU Press Cover photo: Moonrise over Fram Bank, Antarctica. Photographer: Steve Nicol © Printed by Griffin Press This edition © 2015 ANU Press Contents Preface: Music and Antarctica . ix Arnan Wiesel Introduction: Listening to Antarctica . 1 Tom Griffiths Mawson’s musings and Morse code: Antarctic silence at the end of the ‘Heroic Era’, and how it was lost . 15 Mark Pharaoh Thulia: a Tale of the Antarctic (1843): The earliest Antarctic poem and its musical setting . 23 Elizabeth Truswell Nankyoku no kyoku: The cultural life of the Shirase Antarctic Expedition 1910–12 . -
Federal Register/Vol. 84, No. 78/Tuesday, April 23, 2019/Rules
Federal Register / Vol. 84, No. 78 / Tuesday, April 23, 2019 / Rules and Regulations 16791 U.S.C. 3501 et seq., nor does it require Agricultural commodities, Pesticides SUPPLEMENTARY INFORMATION: The any special considerations under and pests, Reporting and recordkeeping Antarctic Conservation Act of 1978, as Executive Order 12898, entitled requirements. amended (‘‘ACA’’) (16 U.S.C. 2401, et ‘‘Federal Actions to Address Dated: April 12, 2019. seq.) implements the Protocol on Environmental Justice in Minority Environmental Protection to the Richard P. Keigwin, Jr., Populations and Low-Income Antarctic Treaty (‘‘the Protocol’’). Populations’’ (59 FR 7629, February 16, Director, Office of Pesticide Programs. Annex V contains provisions for the 1994). Therefore, 40 CFR chapter I is protection of specially designated areas Since tolerances and exemptions that amended as follows: specially managed areas and historic are established on the basis of a petition sites and monuments. Section 2405 of under FFDCA section 408(d), such as PART 180—[AMENDED] title 16 of the ACA directs the Director the tolerance exemption in this action, of the National Science Foundation to ■ do not require the issuance of a 1. The authority citation for part 180 issue such regulations as are necessary proposed rule, the requirements of the continues to read as follows: and appropriate to implement Annex V Regulatory Flexibility Act (5 U.S.C. 601 Authority: 21 U.S.C. 321(q), 346a and 371. to the Protocol. et seq.) do not apply. ■ 2. Add § 180.1365 to subpart D to read The Antarctic Treaty Parties, which This action directly regulates growers, as follows: includes the United States, periodically food processors, food handlers, and food adopt measures to establish, consolidate retailers, not States or tribes. -
Reuse of a Site After Remediation. a Case Study from Cape Evans, Ross Island
IP 68 Agenda Item: CEP 6 Presented by: ASOC Original: English Submitted: 23/04/2013 Reuse of a site after remediation. A case study from Cape Evans, Ross Island 1 IP 68 Reuse of a site after remediation. A case study from Cape Evans, Ross Island Information Paper submitted by ASOC1 Abstract The repair and remediation of environmental damage is a current topic at the CEP. Usually sites that have been subject to remediation are no longer used, or are reused by the same operator that conducted the remedial action and that can plan subsequent activities there. However, a different operator may reuse a remediated site without necessarily being aware of the site’s history. The reuse of a remediated site may undo the effects of remediation. This Information Paper examines such an instance, using a case study from a small site at Cape Evans, Ross Island, and makes a number of suggestions relevant to assessing cumulative impacts, assessing the effectiveness of remediation, and managing remediated sites. In most instances, it would be better to concentrate new activities at sites that have already been impacted by earlier activities rather than locating them in near-pristine sites, but there may be scientific and practical value also in leaving some remediated sites undisturbed and subject to ongoing monitoring. Overview The repair and remediation of environmental damage is a topic of current discussion at the CEP. Usually sites are no longer used after remediation, or are reused by the same operator that conducted the remedial action and that can plan subsequent activities there. -
Size Distribution and Ionic Composition of Marine Summer Aerosol at the Continental Antarctic Site Kohnen
Atmos. Chem. Phys., 18, 2413–2430, 2018 https://doi.org/10.5194/acp-18-2413-2018 © Author(s) 2018. This work is distributed under the Creative Commons Attribution 4.0 License. Size distribution and ionic composition of marine summer aerosol at the continental Antarctic site Kohnen Rolf Weller1, Michel Legrand2, and Susanne Preunkert2 1Glaciology Department, Alfred Wegener Institute for Polar and Marine Research, Am Handelshafen 12, 27570 Bremerhaven, Germany 2Université Grenoble Alpes, CNRS, Laboratoire de Glaciologie et Géophysique de l’Environnement (LGGE), Grenoble, France Correspondence: Rolf Weller ([email protected]) Received: 27 June 2017 – Discussion started: 25 October 2017 Revised: 21 December 2017 – Accepted: 22 January 2018 – Published: 19 February 2018 Abstract. We measured aerosol size distributions and con- were associated with enhanced marine aerosol entry, aerosol ducted bulk and size-segregated aerosol sampling dur- deposition on-site during austral summer should be largely ing two summer campaigns in January 2015 and January dominated by typical steady clear sky conditions. 2016 at the continental Antarctic station Kohnen (Dron- ning Maud Land). Physical and chemical aerosol prop- erties differ conspicuously during the episodic impact of a distinctive low-pressure system in 2015 (LPS15) com- 1 Introduction pared to the prevailing clear sky conditions. The approx- imately 3-day LPS15 located in the eastern Weddell Sea The impact of aerosols on global climate, which is in partic- was associated with the following: marine boundary layer ular mediated by governing cloud droplet concentrations and air mass intrusion; enhanced condensation particle con- hence cloud optical properties (Rosenfeld et al., 2014; Sein- centrations (1400 ± 700 cm−3 compared to 250 ± 120 cm−3 feld et al., 2016), is of crucial importance but likewise no- under clear sky conditions; mean ± SD); the occurrence toriously charged with the largest uncertainties (Boucher et of a new particle formation event exhibiting a continu- al., 2013; Seinfeld et al., 2016). -
Hazardous Substances in Antarctica Richard Skinner
PCAS 18 (2015/2016) Supervised Project Report (ANTA604) Hazardous Substances in Antarctica Richard Skinner Student ID: rsk36 King George Island - Historic Fuel and waste store. Source: Wikipedia Word count: 4863 (excluding abstract and references) Abstract The continent of Antarctica is one of the most inhospitable places on the planet, with human survival in this region being totally dependent on the regular and substantial supply of goods and materials from overseas. Energy, primarily in the form of oil, gas and Diesel, form a vital component to this survival in maintaining the functionality for all Antarctic Base stations, field camps and their associated logistics. The transportation, use, storage and disposal of these energy sources has however, in some cases, left a legacy of contamination to areas of the foreshore, seabed and underlying soils. Early expeditions and fledgling base stations were often ill equipped with both the knowledge and facilities to adequately mitigate the adverse environmental effects associated with these substances, and failed to employ the robust and extensive environmental management systems that are present today. Effects on the environment, from anthropogenic sources were historically poorly understood and mismanaged, which has led to a several highly contaminated sites in areas close to current human habitation. In addition, the impacts of human activity on the Antarctic wilderness are often more readily recognizable than anywhere else on the planet. This is due to the absence of any native human population, the relatively recent colonisation of the land and the continent housing some of the most delicate ecosystems of any area on this planet. A significant number of these impacts have arisen on the ice-free ground close to the majority of Antarctic scientific research stations and where significant sites of scientific interest are also located. -
Antarctic.V12.4.1991.Pdf
500 lOOOMOTtcn ANTARCTIC PENINSULA s/2 9 !S°km " A M 9 I C j O m t o 1 Comandante Ferraz brazil 2 Henry Arctowski polano 3 Teniente Jubany Argentina 4 Artigas uruouav 5 Teniente Rodotfo Marsh emu BeHingshausen ussr Great WaD owa 6 Capstan Arturo Prat ck«.e 7 General Bernardo O'Higgins cmiu 8 Esperanza argentine 9 Vice Comodoro Marambio Argentina 10 Palmer usa 11 Faraday uk SOUTH 12 Rothera uk SHETLAND 13 Teniente Carvajal chile 14 General San Martin Argentina ISLANDS JOOkm NEW ZEALAND ANTARCTIC SOCIETY MAP COPYRIGHT Vol. 12 No. 4 Antarctic Antarctic (successor to "Antarctic News Bulletin") Vol. 12 No.4 Contents Polar New Zealand 94 Australia 101 Pakistan 102 United States 104 West Germany 111 Sub-Antarctic ANTARCTIC is published quarterly by Heard Island 116 theNew Zealand Antarctic Society Inc., 1978. General ISSN 0003-5327 Antarctic Treaty 117 Greenpeace 122 Editor: Robin Ormerod Environmental database 123 Please address all editorial inquiries, contri Seven peaks, seven months 124 butions etc to the Editor, P.O. Box 2110, Wellington, New Zealand Books Antarctica, the Ross Sea Region 126 Telephone (04) 791.226 International: +64-4-791-226 Shackleton's Lieutenant 127 Fax: (04)791.185 International: + 64-4-791-185 All administrative inquiries should go to the Secretary, P.O. Box 1223, Christchurch, NZ Inquiries regarding Back and Missing issues to P.O. Box 1223, Christchurch, N.Z. No part of this publication may be reproduced in Cover : Fumeroles on Mt. Melbourne any way, without the prior permission of the pub lishers. Photo: Dr. Paul Broddy Antarctic Vol.