Changes in Glacier Dynamics in the Northern Antarctic Peninsula Since 1985
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Changing Pattern of Ice Flow and Mass Balance for Glaciers Discharging Into the Larsen a and 2 B Embayments, Antarctic Peninsula, 2011 to 2016
Response to “Changing pattern of ice flow and mass balance for glaciers discharging into the Larsen A and B embayments, Antarctic Peninsula, 2011 to 2016” The Cryosphere Discuss., https://doi.org/10.5194/tc-2017-259 Authors: Rott, H., Abdel Jaber, W., Wuite, J., Scheiblauer, S., Floricioiu, D., van Wessem, J.M., Nagler, T., Miranda, N., van den Broeke, M.R. Line numbers in the response refer to the revised version with changes tracked, dated 2018-03-07 In the revised manuscript the figure numbers are shifted by 1 because an additional figure (new Figure 1) was added. This figure, demonstrating excellent agreement between elevation change measured by IceBridge airborne lidar and TanDEM-X, responds to a critical question of Interactive Comment SC1 regarding the quality of the TanDEM-X DEM differencing analysis. Referee comments in italic Anonymous Referee #1 Comment: The paper presents the results of a new analysis of elevation change and flow speed change for the eastern Antarctic Peninsula from Sjogren-Boydell glacier to Leppard Glacier, spanning the major outlets on the mainland Peninsula that were affected by the loss of ice shelves in 1995 and 2002. The study shows that the systems have moved in a positive direct in mass balance (either less negative, or positive outright) in the past few years. They attribute the decline of loss rate to the persistent presence of fast ice in the embayments. This is a very clear and well-written study, with a lot of good (accurate) new data to offer. It could be published as it is. It provides a ‘next chapter’ in the monitoring of this rapidly- changing region impacted by ∼25 years of very warm conditions (1980-2006) which have tapered to slightly cooling over the past several years (still warmer than the mid-20th century by a considerable amount). -
Reply To: “Impact of Marine Processes on Flow Dynamics of Northern Antarctic Peninsula Outlet Glaciers” by Rott Et Al
This is a repository copy of Reply to: “Impact of marine processes on flow dynamics of northern Antarctic Peninsula outlet glaciers” by Rott et al.. White Rose Research Online URL for this paper: http://eprints.whiterose.ac.uk/161878/ Version: Published Version Article: Tuckett, P.A., Ely, J.C. orcid.org/0000-0003-4007-1500, Sole, A.J. orcid.org/0000-0001-5290-8967 et al. (3 more authors) (2020) Reply to: “Impact of marine processes on flow dynamics of northern Antarctic Peninsula outlet glaciers” by Rott et al. Nature Communications, 11 (1). 2970. ISSN 2041-1723 https://doi.org/10.1038/s41467-020-16685-9 Reuse This article is distributed under the terms of the Creative Commons Attribution (CC BY) licence. This licence allows you to distribute, remix, tweak, and build upon the work, even commercially, as long as you credit the authors for the original work. More information and the full terms of the licence here: https://creativecommons.org/licenses/ Takedown If you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing [email protected] including the URL of the record and the reason for the withdrawal request. [email protected] https://eprints.whiterose.ac.uk/ MATTERS ARISING https://doi.org/10.1038/s41467-020-16685-9 OPEN Reply to: “Impact of marine processes on flow dynamics of northern Antarctic Peninsula outlet glaciers” by Rott et al. ✉ Peter A. Tuckett1, Jeremy C. Ely 1 , Andrew J. Sole 1, Stephen J. Livingstone 1, Benjamin J. Davison 2 & J. -
Variations in Surface Velocities of Tidewater Glaciers of the Antarctic Peninsula Between the Periods 1988-1991 and 2000-2003
i i “main” — 2014/9/9 — 22:21 — page 49 — #1 i i Revista Brasileira de Geof´ısica (2014) 32(1): 49-60 © 2014 Sociedade Brasileira de Geof´ısica ISSN 0102-261X www.scielo.br/rbg VARIATIONS IN SURFACE VELOCITIES OF TIDEWATER GLACIERS OF THE ANTARCTIC PENINSULA BETWEEN THE PERIODS 1988-1991 AND 2000-2003 Aline B. Silva, Jorge Arigony-Neto, Claudio´ W. Mendes-Junior´ and Adriano G. Lemos ABSTRACT. In the Antarctic Peninsula, recent events of glacier retreat, disintegration and break-up of ice shelves indicated that ice masses in this region are reacting rapidly to the increasing trend in oceanic and surface air temperatures. This study aimed to define variations in ice flow velocity of tidewater glaciers between the periods of 1988-1991 and 2000-2003, in northeastern, northwestern and midwestern Marguerite Bay and Larsen C ice shelf sectors. Glacier velocities were estimated by the application of a cross-correlation algorithm of IMCORR software in multitemporal LANDSAT TM/ETM+ images. Moreover, we used monthly mean oceanic and air temperature data from OCCAM and ERA-Interim models, respectively. Ice flow velocities on the northeastern sector was 0.24 ± 0.12 md–1 in the period 1988- 1991, while in 2000-2002 it was 0.06 ± 0.02 md–1. In the northwestern part of the peninsula, the mean glacier velocity was 0.10 ± 0.005 md–1 between 1989 and 1990, and 0.22 ± 0.13 md–1 between 2000 and 2001. In the Midwestern sector, the mean velocity of glaciers was 1.06 ± 0.86 md–1 in the period 1989-1991, and 0.84 ± 0.78 md–1 in the period 2000-2001. -
Changing Pattern of Ice Flow and Mass Balance for Glaciers Discharging
The Cryosphere, 12, 1273–1291, 2018 https://doi.org/10.5194/tc-12-1273-2018 © Author(s) 2018. This work is distributed under the Creative Commons Attribution 4.0 License. Changing pattern of ice flow and mass balance for glaciers discharging into the Larsen A and B embayments, Antarctic Peninsula, 2011 to 2016 Helmut Rott1,2, Wael Abdel Jaber3, Jan Wuite1, Stefan Scheiblauer1, Dana Floricioiu3, Jan Melchior van Wessem4, Thomas Nagler1, Nuno Miranda5, and Michiel R. van den Broeke4 1ENVEO IT GmbH, Innsbruck, Austria 2Institute of Atmospheric and Cryospheric Sciences, University of Innsbruck, Innsbruck, Austria 3Institute for Remote Sensing Technology, German Aerospace Center, Oberpfaffenhofen, Germany 4Institute for Marine and Atmospheric Research, Utrecht University, Utrecht, the Netherlands 5European Space Agency/ESRIN, Frascati, Italy Correspondence: ([email protected]) Received: 20 November 2017 – Discussion started: 28 November 2017 Revised: 7 March 2018 – Accepted: 11 March 2018 – Published: 11 April 2018 Abstract. We analysed volume change and mass balance −2.32 ± 0.25 Gt a−1. The mass balance in region C during of outlet glaciers on the northern Antarctic Peninsula over the two periods was slightly negative, at −0.54 ± 0.38 Gt a−1 the periods 2011 to 2013 and 2013 to 2016, using high- and −0.58 ± 0.25 Gt a−1. The main share in the overall mass resolution topographic data from the bistatic interferometric losses of the region was contributed by two glaciers: Drygal- radar satellite mission TanDEM-X. Complementary to the ski Glacier contributing 61 % to the mass deficit of region geodetic method that applies DEM differencing, we com- A, and Hektoria and Green glaciers accounting for 67 % to puted the net mass balance of the main outlet glaciers using the mass deficit of region B. -
Changes in Ice Dynamics and Glacier Mass Balances on the Northern Antarctic Peninsula Derived from Remote Sensing Data
Changes in ice dynamics and glacier mass balances on the northern Antarctic Peninsula derived from remote sensing data Änderungen der Eisdynamiken und Gletschermassenbilanzen auf der nördlichen Antarktischen Halbinsel abgeleitet aus Fernerkundungsdaten Der Naturwissenschaftliche Fakultät der Friedrich-Alexander-Universität Erlangen-Nürnberg zur Erlangung des Doktorgrades Dr. rer. nat. vorgelegt von Thorsten Christian Seehaus aus Bad Neustadt an der Saale Als Dissertation genehmigt von der Naturwissenschaftliche Fakultät der Friedrich-Alexander-Universität Erlangen-Nürnberg Tag der mündlichen Prüfung: 29.11.2016 Vorsitzende/r des Promotionsorgans: Prof. Dr. Georg Kreimer Gutachter/in: Prof. Dr. Matthias Braun Prof. Dr. Wolfgang Rack Prof. Dr. Helmut Rott Table of Contents 1 Summary............................................................................................................................7 2 Zusammenfassung.............................................................................................................9 3 Structure of the thesis......................................................................................................12 4 Remote sensing of polar ice sheets.................................................................................13 4.1 SAR remote sensing..................................................................................................14 4.1.1 SAR Interferometry.............................................................................................17 4.1.1.1 Interferometric -
Mass Changes of Outlet Glaciers Along the Nordensjköld Coast, Northern
PUBLICATIONS Geophysical Research Letters RESEARCH LETTER Mass changes of outlet glaciers along the Nordensjköld 10.1002/2014GL061613 Coast, northern Antarctic Peninsula, based Key Points: on TanDEM-X satellite measurements • Volume change 2011–2013 of Antarctic Peninsula glaciers based Helmut Rott1,2, Dana Floricioiu3, Jan Wuite1, Stefan Scheiblauer1, Thomas Nagler1, and Michael Kern4 on new technique • Downwasting of most outlet glaciers 1ENVEO IT GmbH, Innsbruck, Austria, 2Institute for Meteorology and Geophysics, University of Innsbruck, Innsbruck, Austria, ongoing 18 years afterLarsen-Acollapse 3 4 • Trend of decrease in ice mass losses Institute for Remote Sensing Technology, German Aerospace Center, Oberpfaffenhofen, Germany, ESA-ESTEC, due to deceleration of glacier flow Noordwijk, Netherlands. Supporting Information: Abstract We analyzed volume change and mass balance of outlet glaciers of the northern Antarctic • Readme • Text S1 Peninsula over the period 2011 to 2013, using topographic data of high vertical accuracy and great spatial detail, acquired by bistatic radar interferometry of the TanDEM-X/TerraSAR-X satellite formation. The study Correspondence to: area includes glaciers draining into the Larsen-A, Larsen Inlet, and Prince-Gustav-Channel embayments. After H. Rott, collapse of buttressing ice shelves in 1995 the glaciers became tidewater calving glaciers and accelerated, [email protected] resulting in increased ice export. Downwasting of most glaciers is going on, but at reduced rates compared to À previous years in accordance with deceleration of ice flow. The rate of mass depletion is 4.2 ± 0.4 Gt a 1, with Citation: À1 the largest contribution by Drygalski Glacier amounting to 2.2 ± 0.2 Gt a. On the technological side, the Rott,H.,D.Floricioiu,J.Wuite,S.Scheiblauer, T. -
1 Changing Pattern of Ice Flow and Mass Balance for Glaciers Discharging Into the Larsen a and 2 B Embayments, Antarctic Peninsula, 2011 to 2016
1 Changing pattern of ice flow and mass balance for glaciers discharging into the Larsen A and 2 B embayments, Antarctic Peninsula, 2011 to 2016 3 4 Helmut Rott1,2 *, Wael Abdel Jaber3, Jan Wuite1, Stefan Scheiblauer1, Dana Floricioiu3, Jan 5 Melchior van Wessem4, Thomas Nagler1, Nuno Miranda5, Michiel R. van den Broeke4 6 7 [1] ENVEO IT GmbH, Innsbruck, Austria 8 [2] Institute of Atmospheric and Cryospheric Sciences, University of Innsbruck, Innsbruck, Austria 9 [3] Institute for Remote Sensing Technology, German Aerospace Center, Oberpfaffenhofen, 10 Germany 11 [4] Institute for Marine and Atmospheric Research, Utrecht University, Utrecht, the Netherlands 12 [5] European Space Agency/ESRIN, Frascati, Italy 13 *Correspondence to: [email protected] 14 15 1 16 Abstract 17 18 We analyzed volume change and mass balance of outlet glaciers on the northern Antarctic Peninsula 19 over the periods 2011 to 2013 and 2013 to 2016, using high resolution topographic data of the 20 bistatic interferometric radar satellite mission TanDEM-X. Complementary to the geodetic method 21 applying DEM differencing, we computed the net mass balance of the main outlet glaciers by the 22 mass budget method, accounting for the difference between the surface mass balance (SMB) and 23 the discharge of ice into an ocean or ice shelf. The SMB values are based on output of the regional 24 climate model RACMO Version 2.3p2. For studying glacier flow and retrieving ice discharge we 25 generated time series of ice velocity from data of different satellite radar sensor, with radar images 26 of the satellites TerraSAR-X and TanDEM-X as main source. -
Investigation of Coastal Dynamics of the Antarctic Ice
INVESTIGATION OF COASTAL DYNAMICS OF THE ANTARCTIC ICE SHEET USING SEQUENTIAL RADARSAT SAR IMAGES A Thesis by SHENG-JUNG TANG Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May 2007 Major Subject: Geography INVESTIGATION OF COASTAL DYNAMICS OF THE ANTARCTIC ICE SHEET USING SEQUENTIAL RADARSAT SAR IMAGES A Thesis by SHENG-JUNG TANG Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Approved by: Chair of Committee, Hongxing Liu Committee Members, Andrew G. Klein John R. Giardino Head of Department, Douglas J. Sherman May 2007 Major Subject: Geography iii ABSTRACT Investigation of Coastal Dynamics of the Antarctic Ice Sheet Using Sequential Radarsat SAR Images. (May 2007) Sheng-Jung Tang, B.Eng., National Taiwan University of Science and Technology Chair of Advisory Committee: Dr. Hongxing Liu Increasing human activities have brought about a global warming trend, and cause global sea level rise. Investigations of variations in coastal margins of Antarctica and in the glacial dynamics of the Antarctic Ice Sheet provide useful diagnostic information for understanding and predicting sea level changes. This research investigates the coastal dynamics of the Antarctic Ice Sheet in terms of changes in the coastal margin and ice flow velocities. The primary methods used in this research include image segmentation based coastline extraction and image matching based velocity derivation. The image segmentation based coastline extraction method uses a modified adaptive thresholding algorithm to derive a high-resolution, complete coastline of Antarctica from 2000 orthorectified SAR images at the continental scale. -
U.S. Antarctic Projects Officer
p Eli OF THE U.S. ANTARCTIC I PROJECTS OFFICER VOLUME V NUMBER 8 APRIL 1964 BULLETIN of the U.S. ANTARCTIC PROJECTS OFFICER An account of logistic and scientific programs and current events of interest in Antarctica. Published from September through June and distributed to organizations, groups, and individuals interested in United States Antarctic programs, plans, and activities. Rear Admiral James R. Reedy, US N United States Antarctic Projects Officer Vol. V, No. 8 April 1964 ACKNOWLEDGEMENTS CONTENTS Material for this issue of the Bulletin was A Message to the Men of DEEP FREEZE 64 ........1 abstracted from United States Navy official news releases, a Secretary of Defense Monthly Digest ..................................2 official news release, THE MATS FLYER of February 1964, and National Science Fire At Hallett Station .............................3 Foundation United States Antarctic Research Program Antarctic Status Reports for Nov- Pier Carving ...................................4 ember and December 1963. Post-Season Flight to Amundsen-Scott South Pole Station Establishes Longest The United States Antarctic Projects Off- Summer Season in History of Station .......4 icer and his staff are indebted to Mr. J. H. Weir and the Honorable George Laking of Iceberg Enters Channel in McMurdo Sound .........5 the New Zealand Embassy for granting per- mission to reproduce the speech delivered On Wintering-Over ......................... .....S to the Antarctican Society on 30 January 1964, and to Mr. Earl H. Moser, Jr., of New Zealand in the Antarctic .....................6 the U. S. Naval Civil Engineering Labor- atory for preparing the article on USNCEL Navy Commissions USS RICHARD E. BYRD ........9 research and development in polar regions Geographic Names of Antarctica ..................10 All photographs are official U. -
Article Is Available Antarctic Peninsula Glacier Basin Inventory and Observed Area Online At
The Cryosphere, 12, 1273–1291, 2018 https://doi.org/10.5194/tc-12-1273-2018 © Author(s) 2018. This work is distributed under the Creative Commons Attribution 4.0 License. Changing pattern of ice flow and mass balance for glaciers discharging into the Larsen A and B embayments, Antarctic Peninsula, 2011 to 2016 Helmut Rott1,2, Wael Abdel Jaber3, Jan Wuite1, Stefan Scheiblauer1, Dana Floricioiu3, Jan Melchior van Wessem4, Thomas Nagler1, Nuno Miranda5, and Michiel R. van den Broeke4 1ENVEO IT GmbH, Innsbruck, Austria 2Institute of Atmospheric and Cryospheric Sciences, University of Innsbruck, Innsbruck, Austria 3Institute for Remote Sensing Technology, German Aerospace Center, Oberpfaffenhofen, Germany 4Institute for Marine and Atmospheric Research, Utrecht University, Utrecht, the Netherlands 5European Space Agency/ESRIN, Frascati, Italy Correspondence: ([email protected]) Received: 20 November 2017 – Discussion started: 28 November 2017 Revised: 7 March 2018 – Accepted: 11 March 2018 – Published: 11 April 2018 Abstract. We analysed volume change and mass balance −2.32 ± 0.25 Gt a−1. The mass balance in region C during of outlet glaciers on the northern Antarctic Peninsula over the two periods was slightly negative, at −0.54 ± 0.38 Gt a−1 the periods 2011 to 2013 and 2013 to 2016, using high- and −0.58 ± 0.25 Gt a−1. The main share in the overall mass resolution topographic data from the bistatic interferometric losses of the region was contributed by two glaciers: Drygal- radar satellite mission TanDEM-X. Complementary to the ski Glacier contributing 61 % to the mass deficit of region geodetic method that applies DEM differencing, we com- A, and Hektoria and Green glaciers accounting for 67 % to puted the net mass balance of the main outlet glaciers using the mass deficit of region B. -
Coastal-Change and Glaciological Map of the Trinity Peninsula Area and South Shetland Islands, Antarctica: 1843–2001
Prepared in cooperation with the British Antarctic Survey, Scott Polar Research Institute, and Bundesamt für Kartographie und Geodäsie Coastal-Change and Glaciological Map of the Trinity Peninsula Area and South Shetland Islands, Antarctica: 1843–2001 By Jane G. Ferrigno, Alison J. Cook, Kevin M. Foley, Richard S. Williams, Jr., Charles Swithinbank, Adrian J. Fox, Janet W. Thomson, and Jörn Sievers Pamphlet to accompany Geologic Investigations Series Map I–2600–A 2006 U.S. Department of the Interior U.S. Geological Survey U.S. Department of the Interior Dirk Kempthorne, Secretary U.S. Geological Survey P. Patrick Leahy, Acting Director U.S. Geological Survey, Reston, Virginia: 2006 For product and ordering information: World Wide Web: http://www.usgs.gov/pubprod Telephone: 1-888-ASK-USGS For more information on the USGS--the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment: World Wide Web: http://www.usgs.gov Telephone: 1-888-ASK-USGS Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this report is in the public domain, permission must be secured from the individual copyright owners to reproduce any copyrighted materials contained within this report. Suggested citation: Ferrigno, J.G., Cook, A.J., Foley, K.M., Williams, R.S., Jr., Swithinbank, Charles, Fox, A.J., Thomson, J.W., and Sievers, Jörn, 2006, Coastal-change and glaciological map of the Trinity Peninsula area and South Shetland Islands, Antarc- tica—1843–2001: U.S. Geological Survey Geologic Investigations Series Map I–2600–A, 1 map sheet, 32-p. -
Gazetteer of the Antarctic
NOIJ.VQNn OJ3ON3133^1 VNOI±VN r o CO ] ] Q) 1 £Q> : 0) >J N , CO O The National Science Foundation has TDD (Telephonic Device for the Deaf) capability, which enables individuals with hearing impairment to communicate with the Division of Personnel and Management about NSF programs, employment, or general information. This number is (202) 357-7492. GAZETTEER OF THE ANTARCTIC Fourth Edition names approved by the UNITED STATES BOARD ON GEOGRAPHIC NAMES a cooperative project of the DEFENSE MAPPING AGENCY Hydrographic/Topographic Center Washington, D. C. 20315 UNITED STATES GEOLOGICAL SURVEY National Mapping Division Reston, Virginia 22092 NATIONAL SCIENCE FOUNDATION Division of Polar Programs Washington, D. C. 20550 1989 STOCK NO. GAZGNANTARCS UNITED STATES BOARD ON GEOGRAPHIC NAMES Rupert B. Southard, Chairman Ralph E. Ehrenberg, Vice Chairman Richard R. Randall, Executive Secretary Department of Agriculture .................................................... Sterling J. Wilcox, member Donald D. Loff, deputy Anne Griesemer, deputy Department of Commerce .................................................... Charles E. Harrington, member Richard L. Forstall, deputy Henry Tom, deputy Edward L. Gates, Jr., deputy Department of Defense ....................................................... Thomas K. Coghlan, member Carl Nelius, deputy Lois Winneberger, deputy Department of the Interior .................................................... Rupert B. Southard, member Tracy A. Fortmann, deputy David E. Meier, deputy Joel L. Morrison, deputy Department