2004 - 2005 Antarctic Air Operations Planning Summary
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Rapid Transport of Ash and Sulfate from the 2011 Puyehue-Cordón
PUBLICATIONS Journal of Geophysical Research: Atmospheres RESEARCH ARTICLE Rapid transport of ash and sulfate from the 2011 10.1002/2017JD026893 Puyehue-Cordón Caulle (Chile) eruption Key Points: to West Antarctica • Ash and sulfate from the June 2011 Puyehue-Cordón Caulle eruption were Bess G. Koffman1,2 , Eleanor G. Dowd1 , Erich C. Osterberg1 , David G. Ferris1, deposited in West Antarctica 3 3 3,4 1 • Depositional phasing and duration Laura H. Hartman , Sarah D. Wheatley , Andrei V. Kurbatov , Gifford J. Wong , 5 6 3,4 4 suggest rapid transport through the Bradley R. Markle , Nelia W. Dunbar , Karl J. Kreutz , and Martin Yates troposphere • Ash/sulfate phasing, ash size 1Department of Earth Sciences, Dartmouth College, Hanover, New Hampshire, USA, 2Now at Department of Geology, Colby distributions, and geochemistry College, Waterville, Maine, USA, 3Climate Change Institute, University of Maine, Orono, Maine, USA, 4School of Earth and distinguish this midlatitude eruption Climate Sciences, University of Maine, Orono, Maine, USA, 5Department of Earth and Space Sciences, University of from low- and high-latitude eruptions Washington, Seattle, Washington, USA, 6New Mexico Bureau of Geology and Mineral Resources, Socorro, New Mexico, USA Supporting Information: • Supporting Information S1 Abstract The Volcanic Explosivity Index 5 eruption of the Puyehue-Cordón Caulle volcanic complex (PCC) in central Chile, which began 4 June 2011, provides a rare opportunity to assess the rapid transport and Correspondence to: deposition of sulfate and ash from a midlatitude volcano to the Antarctic ice sheet. We present sulfate, B. G. Koffman, [email protected] microparticle concentrations of fine-grained (~5 μm diameter) tephra, and major oxide geochemistry, which document the depositional sequence of volcanic products from the PCC eruption in West Antarctic snow and shallow firn. -
Heterogenous Thinning and Subglacial Lake Activity on Thwaites Glacier, West Antarctica Andrew O
https://doi.org/10.5194/tc-2020-80 Preprint. Discussion started: 9 April 2020 c Author(s) 2020. CC BY 4.0 License. Brief Communication: Heterogenous thinning and subglacial lake activity on Thwaites Glacier, West Antarctica Andrew O. Hoffman1, Knut Christianson1, Daniel Shapero2, Benjamin E. Smith2, Ian Joughin2 1Department of Earth and Space Sciences, University of Washington, Seattle, 98115, United States of America 5 2Applied Physics Laboratory, University of Washington, 98115, United States of America Correspondence to: Andrew O. Hoffman ([email protected]) Abstract. A system of subglacial laKes drained on Thwaites Glacier from 2012-2014. To improve coverage for subsequent drainage events, we extended the elevation and ice velocity time series on Thwaites Glacier through austral winter 2019. These new observations document a second drainage cycle and identified two new laKe systems located in the western tributaries of 10 Thwaites and Haynes Glaciers. In situ and satellite velocity observations show temporary < 3% speed fluctuations associated with laKe drainages. In agreement with previous studies, these observations suggest that active subglacial hydrology has little influence on Thwaites Glacier thinning and retreat on decadal to centennial timescales. 1 Introduction Although subglacial laKes beneath the Antarctic Ice Sheet were first discovered more than 50 years ago (Robin et al., 1969; 15 Oswald and Robin, 1973), they remain one of the most enigmatic components of the subglacial hydrology system. Initially identified in ice-penetrating radar data as flat, bright specular reflectors (Oswald and Robin, 1973; Carter et al., 2007) subglacial laKes were thought to be relatively steady-state features of the basal hydrology system with little impact on the dynamics of the overlying ice on multi-year timescales. -
Mcmurdo Dry Valleys, Southern Victoria Land
Measure 1 (2004) Annex Management Plan for Antarctic Specially Managed Area No. 2 MCMURDO DRY VALLEYS, SOUTHERN VICTORIA LAND 1. Description of values to be protected and activities to be managed The McMurdo Dry Valleys are characterized as the largest relatively ice-free region in Antarctica with approximately thirty percent of the ground surface largely free of snow and ice. The region encompasses a cold desert ecosystem, whose climate is not only cold and extremely arid (in the Wright Valley the mean annual temperature is –19.8°C and annual precipitation is less than 100 mm water equivalent), but also windy. The landscape of the Area contains glaciers, mountain ranges, ice-covered lakes, meltwater streams, arid patterned soils and permafrost, sand dunes, and interconnected watershed systems. These watersheds have a regional influence on the McMurdo Sound marine ecosystem. The Area’s location, where large-scale seasonal shifts in the water phase occur, is of great importance to the study of climate change. Through shifts in the ice-water balance over time, resulting in contraction and expansion of hydrological features and the accumulations of trace gases in ancient snow, the McMurdo Dry Valley terrain also contains records of past climate change. The extreme climate of the region serves as an important analogue for the conditions of ancient Earth and contemporary Mars, where such climate may have dominated the evolution of landscape and biota. The Area is characterized by unique ecosystems of low biodiversity and reduced food web complexity. However, as the largest ice-free region in Antarctica, the McMurdo Dry Valleys also contain relatively diverse habitats compared with other ice-free areas. -
U.S. Advance Exchange of Operational Information, 2005-2006
Advance Exchange of Operational Information on Antarctic Activities for the 2005–2006 season United States Antarctic Program Office of Polar Programs National Science Foundation Advance Exchange of Operational Information on Antarctic Activities for 2005/2006 Season Country: UNITED STATES Date Submitted: October 2005 SECTION 1 SHIP OPERATIONS Commercial charter KRASIN Nov. 21, 2005 Depart Vladivostok, Russia Dec. 12-14, 2005 Port Call Lyttleton N.Z. Dec. 17 Arrive 60S Break channel and escort TERN and Tanker Feb. 5, 2006 Depart 60S in route to Vladivostok U.S. Coast Guard Breaker POLAR STAR The POLAR STAR will be in back-up support for icebreaking services if needed. M/V AMERICAN TERN Jan. 15-17, 2006 Port Call Lyttleton, NZ Jan. 24, 2006 Arrive Ice edge, McMurdo Sound Jan 25-Feb 1, 2006 At ice pier, McMurdo Sound Feb 2, 2006 Depart McMurdo Feb 13-15, 2006 Port Call Lyttleton, NZ T-5 Tanker, (One of five possible vessels. Specific name of vessel to be determined) Jan. 14, 2006 Arrive Ice Edge, McMurdo Sound Jan. 15-19, 2006 At Ice Pier, McMurdo. Re-fuel Station Jan. 19, 2006 Depart McMurdo R/V LAURENCE M. GOULD For detailed and updated schedule, log on to: http://www.polar.org/science/marine/sched_history/lmg/lmgsched.pdf R/V NATHANIEL B. PALMER For detailed and updated schedule, log on to: http://www.polar.org/science/marine/sched_history/nbp/nbpsched.pdf SECTION 2 AIR OPERATIONS Information on planned air operations (see attached sheets) SECTION 3 STATIONS a) New stations or refuges not previously notified: NONE b) Stations closed or refuges abandoned and not previously notified: NONE SECTION 4 LOGISTICS ACTIVITIES AFFECTING OTHER NATIONS a) McMurdo airstrip will be used by Italian and New Zealand C-130s and Italian Twin Otters b) McMurdo Heliport will be used by New Zealand and Italian helicopters c) Extensive air, sea and land logistic cooperative support with New Zealand d) Twin Otters to pass through Rothera (UK) upon arrival and departure from Antarctica e) Italian Twin Otter will likely pass through South Pole and McMurdo. -
2006 NSIDC Annual Report
National Snow and Ice Data Center World Data Center for Glaciology, Boulder Annual Report 2006 Supporting Cryospheric Research Since 1976 National Snow and Ice Data Center World Data Center for Glaciology, Boulder Annual Report 2006 Cover image captions (clockwise from upper left) During the IceTrek expedition, team members tow a sled with equipment to install on an Antarctic iceberg. (Courtesy Ted Scambos, NSIDC) This image shows the Beaufort Sea Polynya. A polynya, or area of persistent open water surrounded by ice, appeared during the summer 2006 Arctic sea ice melt season. The polynya is the dark area of open water; to the left is the coastline of Alaska, showing fall foliage color, and to the bottom right is the North Pole. This image is from the Moderate Resolution Imaging Spectroradiometer (MODIS) sensor, which flies on the NASA Terra and Aqua satellites. (Courtesy NSIDC) Toboggan Glacier, Alaska, in 1909. This image one of a pair of photographs available through the “Repeat Photography of Glaciers” portion of NSIDC’s online Glacier Photograph Collection. These photograph pairs illustrate the dramatic changes that researchers have observed in glaciers worldwide over the past century. (Photograph courtesy of Sidney Paige/USGS Photo Library, available through NSIDC’s online Glacier Photograph Collection). Members of the IceTrek expedition practiced installing their meteorological equipment on this small Antarctic iceberg, nicknamed “Chip,” before installing the equipment permanently on larger icebergs. (Courtesy Ted Scambos, NSIDC) Supporting Cryospheric Research Since 1976 Supporting Cryospheric Research Since 1976 ii Supporting Cryospheric Research Since 1976 Contents Table of Contents Introduction 1 Highlights 3 Data Management at NSIDC 5 Programs 10 The Distributed Active Archive Center (DAAC) 10 The Arctic System Science (ARCSS) Data Coordination Center (ADCC) 14 U.S. -
Siple Dome Ice Reveals Two Modes of Millennial CO2 Change During the Last Ice Age
ARTICLE Received 4 Dec 2013 | Accepted 26 Mar 2014 | Published 29 Apr 2014 DOI: 10.1038/ncomms4723 OPEN Siple Dome ice reveals two modes of millennial CO2 change during the last ice age Jinho Ahn1 & Edward J. Brook2 Reconstruction of atmospheric CO2 during times of past abrupt climate change may help us better understand climate-carbon cycle feedbacks. Previous ice core studies reveal simultaneous increases in atmospheric CO2 and Antarctic temperature during times when Greenland and the northern hemisphere experienced very long, cold stadial conditions during the last ice age. Whether this relationship extends to all of the numerous stadial events in the Greenland ice core record has not been clear. Here we present a high-resolution record of atmospheric CO2 from the Siple Dome ice core, Antarctica for part of the last ice age. We find that CO2 does not significantly change during the short Greenlandic stadial events, implying that the climate system perturbation that produced the short stadials was not strong enough to substantially alter the carbon cycle. 1 School of Earth and Environmental Sciences, Seoul National University, Seoul 151742, Korea. 2 College of Earth, Ocean and Atmospheric Sciences, Oregon State University, Corvallis, Oregon 97331, USA. Correspondence and requests for materials should be addressed to J.A. (email: [email protected]). NATURE COMMUNICATIONS | 5:3723 | DOI: 10.1038/ncomms4723 | www.nature.com/naturecommunications 1 & 2014 Macmillan Publishers Limited. All rights reserved. ARTICLE NATURE COMMUNICATIONS | DOI: 10.1038/ncomms4723 ce core records from Greenland reveal a detailed history of the last ice age, marine sediment records indicate shoaled abrupt climate change during the last glacial period. -
Blue Sky Airlines
GPS Support to the National Science Foundation Office of Polar Programs 2001-2002 Season Report GPS Support to the National Science Foundation Office of Polar Programs 2001-2002 Season Report April 15, 2002 Bjorn Johns Chuck Kurnik Shad O’Neel UCAR/UNAVCO Facility University Corporation for Atmospheric Research 3340 Mitchell Lane Boulder, CO 80301 (303) 497-8034 www.unavco.ucar.edu Support funded by the National Science Foundation Office of Polar Programs Scientific Program Order No. 2 (EAR-9903413) to Cooperative Agreement No. 9732665 Cover photo: Erebus Ice Tongue Mapping – B-017 1 UNAVCO 2001-2002 Report Table of Contents: Summary........................................................................................................................................................ 3 Table 1 – 2001-2001 Antarctic Support Provided................................................................................. 4 Table 2 – 2001 Arctic Support Provided................................................................................................ 4 Science Support............................................................................................................................................. 5 Training.................................................................................................................................................... 5 Field Support........................................................................................................................................... 5 Data Processing .................................................................................................................................... -
II. Expedition Dates
Information Exchange Under United States Antarctic Activities Articles III and VII(5) of the Modifications of Activities Planned for 2003-2004 ANTARCTIC TREATY II. Expedition Dates II. Expedition Dates Section II of the Modifications of Activities Planned for 2003-2004 lists the actual dates of significant events occurring during this time period. Significant Dates of Expeditions Date Activity 05 Apr 03 LMG03-04 10 May 03 LMG03-04A 16 June 03 LMG03-05 16 Aug 03 LMG03-05A 21 Aug 03 First flight to McMurdo Station for Winfly operations 22 Aug 03 NBP03-04C 07 Sep 03 LMG Maintenance open period for maintenance 14 Sep 03 NBP03-04C 22 Sep 03 LMG03-06 28 Sep 03 Palmer Station annual relief 30 Sep 03 First C-141 mission to McMurdo Station during Ice Runway period McMurdo Station commenced summer operations (1 of 19) 05 Oct 03 Marble Point opens 01 Oct 03 First C-17 mission of the season to McMurdo Station (1 of 12) 09 Oct 03 NBP03-04D 10 Oct 03 LMG03-07 (Palmer Station Shuttle) 14 Oct 03 Pieter J. Lenie Field Station (Copacabana) opens 14 Oct 03 Odell Glacier Camp Opens 14 Oct 03 Lake Hoare Camp opens 16 Oct 03 Lake Bonney Camp opens 17 Oct 03 F6 Camp opens 18 Oct 03 Lake Fryxell Camp opens National Science Foundation 2 Arlington, Virginia 22230 October 1, 2004 Information Exchange Under United States Antarctic Activities Articles III and VII(5) of the Modifications of Activities Planned for 2003-2004 ANTARCTIC TREATY II. Expedition Dates Date Activity 22 Oct 03 Three (3) 109th AW LC-130’s arrive McMurdo Station to start on-continent missions -
The University of Texas at Austin • Jackson School Of
THE UNIVERSITY OF TEXAS AT AUSTIN • JACKSON SCHOOL OF GEOSCIENCES • 2014 NEWSLETTER NEWSLETTER 2014 • GEOSCIENCES OF SCHOOL JACKSON • AUSTIN AT TEXAS OF UNIVERSITY THE Ne2014wsletter Newsletter insidecover_final_outlined.indd 1 9/15/2014 4:07:08 PM CONTENTS 2 WELCOME 3 BRIEFS 18 FIELD EXPERIENCES 20 IN THE NEWS 25 AWARDS & HONORS 29 LIBRARY REPORT 30 SCIENTISTS On the cover: Jackson School of Geosciences research professor Ian Dalziel with Eugenia Sangines at Siccar Point in Scotland. See pages 32 SUMMER FIELD CAMPS 82-83 for more about the 2014 Texas Exes trip. FEATURES 36 OPENING UP Mexico deregulates its state-run oil industry. By Tracy Idell Hamilton 39 PREPPING FOR SPACE A Jackson School geologist trains astronauts for trip to space. By John Williams 42 DISSECTING A GLACIER Research helps reveal Thwaites Glacier’s role in sea level rise. By Tim Green 44 STRIKING IT BIG WITH NANOTECH Scientists unlock the potential of nanotechnology in energy. By Joshua Zaffos 46 LIFELESS WATERS Mississippi River pollution a likely contributor to Gulf dead zone. By John Williams 49 RIDE HIGH AND SEEK Lidar is giving researchers an eagle-eyed view of the land. By Joshua Zaffos 51 BACK FROM TOTTEN The Newsletter, a tradition since 1950, is Ice alters research plans. By Terry Britt published annually for friends and alumni of the Jackson School of Geosciences at the 52 GEOFORCE TURNS 10 University of Texas at Austin. Program introduces high-schoolers to geoscience. By Angela Curtis EDITOR: Anton Caputo 54 A CLASSROOM AT THE EDGE OF THE WORLD ASSOCIATE EDITOR: Melissa Weber Students and professors take a journey to the Arctic. -
I!Ij 1)11 U.S
u... I C) C) co 1 USGS 0.. science for a changing world co :::2: Prepared in cooperation with the Scott Polar Research Institute, University of Cambridge, United Kingdom Coastal-change and glaciological map of the (I) ::E Bakutis Coast area, Antarctica: 1972-2002 ;::+' ::::r ::J c:r OJ ::J By Charles Swithinbank, RichardS. Williams, Jr. , Jane G. Ferrigno, OJ"" ::J 0.. Kevin M. Foley, and Christine E. Rosanova a :;:,..... CD ~ (I) I ("') a Geologic Investigations Series Map I- 2600- F (2d ed.) OJ ~ OJ '!; :;:, OJ ::J <0 co OJ ::J a_ <0 OJ n c; · a <0 n OJ 3 OJ "'C S, ..... :;:, CD a:r OJ ""a. (I) ("') a OJ .....(I) OJ <n OJ n OJ co .....,...... ~ C) .....,0 ~ b 0 C) b C) C) T....., Landsat Multispectral Scanner (MSS) image of Ma rtin and Bea r Peninsulas and Dotson Ice Shelf, Bakutis Coast, CT> C) An tarctica. Path 6, Row 11 3, acquired 30 December 1972. ? "T1 'N 0.. co 0.. 2003 ISBN 0-607-94827-2 U.S. Department of the Interior 0 Printed on rec ycl ed paper U.S. Geological Survey 9 11~ !1~~~,11~1!1! I!IJ 1)11 U.S. DEPARTMENT OF THE INTERIOR TO ACCOMPANY MAP I-2600-F (2d ed.) U.S. GEOLOGICAL SURVEY COASTAL-CHANGE AND GLACIOLOGICAL MAP OF THE BAKUTIS COAST AREA, ANTARCTICA: 1972-2002 . By Charles Swithinbank, 1 RichardS. Williams, Jr.,2 Jane G. Ferrigno,3 Kevin M. Foley, 3 and Christine E. Rosanova4 INTRODUCTION areas Landsat 7 Enhanced Thematic Mapper Plus (ETM+)), RADARSAT images, and other data where available, to compare Background changes over a 20- to 25- or 30-year time interval (or longer Changes in the area and volume of polar ice sheets are intri where data were available, as in the Antarctic Peninsula). -
Wilderness and Aesthetic Values of Antarctica
Wilderness and Aesthetic Values of Antarctica Abstract Antarctica is the least inhabited region in the world and has therefore had the least influence from human activities and, unlike the majority of the Earth’s continents and oceans, can still be considered as mostly wilderness. As every visitor to Antarctica knows, its landscapes are exceptionally beautiful. It was the recognition of the importance of these characteristics that resulted in their protection being included in the Madrid Protocol. Both wilderness and aesthetic values can be impaired by human activities in a variety of ways with the severity varying from negligible to severe, according to the type Protocol on Environmental Protec tion to the Antarctic Trea ty - of activity and its duration, spatial extent and intensity. A map of infrastructure and major travel routes the "M adrid Protocol" in Antarctica will be the first step in visually representing where wilderness and aesthetic values Article 3[1] may be impacted. It is hoped that this will stimulate further discussion on how to describe, acknowledge, The protection of the Antarctic environment and dependent an d associated ecosystems and the intrinsic value of Antarctica, understand and further protect the wilderness and aesthetic values of Antarctica. including its wilderness and aesthetic values and its value as an area for the conduct of scientific research, in particular research essential to understanding the global environment, shall be fundamental considerations in the planning and condu ct of all activities -
Mm^Umamm a N E W S B U L L E T I N
mm^umamm A N E W S B U L L E T I N p u b l i s h e d q u a r t e r l y b y t h e NEW ZEALAND ANTARCTIC SOCIETY ■ H.M.N.Z.S. ENDEAVOUR about to tie up in Winter Quarters Bay. On right, Vince's Cross and Scott's hut. J. Calvert photo. MARCH, 1965 AUSTRALIA Winter and Summer bases Scott- S u m m e r b a s e o n l y t H a l l e f t "cton NEW ZEALAND Transferred base Wilkes UStcAust Temporarily non -operational. .KSyowa TASMANIA , Campbell I. (N-l) , ^ V - r . ^ ^ N . AT // \$ 5«|* Pasar'C ^rd(i/.sA . *"Vp»tuk , N |(I/.«.AJ i - S c o t t ( U . 5 J i t - A N T A R. M^ciJ ^>cwj a fi/V wX " < S M a u d **$P -Marion I. ttM DRAWN BY DEPARTMENT OF LANDS 1 SURVEY WELLINGTON, NEW ZEALAND, MAR.I9l»4- 1 " . " E D I T I O N m ilHl^IBS^IKB^k (Successor to "Antarctic News Bulletin") MARCH, 1965 Editor: L. B. Quartermain, M.A., 1 Ariki Road, Wellington, E.2, New Zealand. Business Communications, Subscriptions, etc., to: Secretary, New Zealand Antarctic Society, P.O. Box 2110, Wellington, N.Z. CONTENTS EXPEDITIONS New Zealand The Central Nimrod Glacier Geological Expedition: M. G. Laird Victoria University Research in Ice-free Areas: W. M. Prebble The D-region Project: J. B. Gregory France United States First Leg of Traverse Australia Belgium-Holland U.S.S.R South Africa Argentina United Kingdom Chile Japan Sub-Antarctic Islands British South Georgia Expedition Big Ben Conquered Special Articles: Hallett Closed Antarctic Stations—I.