Defining the Outer Limits of the Continental Shelf Across the Arctic Basin
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A Newly Discovered Glacial Trough on the East Siberian Continental Margin
Clim. Past Discuss., doi:10.5194/cp-2017-56, 2017 Manuscript under review for journal Clim. Past Discussion started: 20 April 2017 c Author(s) 2017. CC-BY 3.0 License. De Long Trough: A newly discovered glacial trough on the East Siberian Continental Margin Matt O’Regan1,2, Jan Backman1,2, Natalia Barrientos1,2, Thomas M. Cronin3, Laura Gemery3, Nina 2,4 5 2,6 7 1,2,8 9,10 5 Kirchner , Larry A. Mayer , Johan Nilsson , Riko Noormets , Christof Pearce , Igor Semilietov , Christian Stranne1,2,5, Martin Jakobsson1,2. 1 Department of Geological Sciences, Stockholm University, Stockholm, 106 91, Sweden 2 Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden 10 3 US Geological Survey MS926A, Reston, Virginia, 20192, USA 4 Department of Physical Geography (NG), Stockholm University, SE-106 91 Stockholm, Sweden 5 Center for Coastal and Ocean Mapping, University of New Hampshire, New Hampshire 03824, USA 6 Department of Meteorology, Stockholm University, Stockholm, 106 91, Sweden 7 University Centre in Svalbard (UNIS), P O Box 156, N-9171 Longyearbyen, Svalbard 15 8 Department of Geoscience, Aarhus University, Aarhus, 8000, Denmark 9 Pacific Oceanological Institute, Far Eastern Branch of the Russian Academy of Sciences, 690041 Vladivostok, Russia 10 Tomsk National Research Polytechnic University, Tomsk, Russia Correspondence to: Matt O’Regan ([email protected]) 20 Abstract. Ice sheets extending over parts of the East Siberian continental shelf have been proposed during the last glacial period, and during the larger Pleistocene glaciations. The sparse data available over this sector of the Arctic Ocean has left the timing, extent and even existence of these ice sheets largely unresolved. -
Flow of Pacific Water in the Western Chukchi
Deep-Sea Research I 105 (2015) 53–73 Contents lists available at ScienceDirect Deep-Sea Research I journal homepage: www.elsevier.com/locate/dsri Flow of pacific water in the western Chukchi Sea: Results from the 2009 RUSALCA expedition Maria N. Pisareva a,n, Robert S. Pickart b, M.A. Spall b, C. Nobre b, D.J. Torres b, G.W.K. Moore c, Terry E. Whitledge d a P.P. Shirshov Institute of Oceanology, 36, Nakhimovski Prospect, Moscow 117997, Russia b Woods Hole Oceanographic Institution, 266 Woods Hole Road, Woods Hole, MA 02543, USA c Department of Physics, University of Toronto, 60 St. George Street, Toronto, Ontario M5S 1A7, Canada d University of Alaska Fairbanks, 505 South Chandalar Drive, Fairbanks, AK 99775, USA article info abstract Article history: The distribution of water masses and their circulation on the western Chukchi Sea shelf are investigated Received 10 March 2015 using shipboard data from the 2009 Russian-American Long Term Census of the Arctic (RUSALCA) pro- Received in revised form gram. Eleven hydrographic/velocity transects were occupied during September of that year, including a 25 August 2015 number of sections in the vicinity of Wrangel Island and Herald canyon, an area with historically few Accepted 25 August 2015 measurements. We focus on four water masses: Alaskan coastal water (ACW), summer Bering Sea water Available online 31 August 2015 (BSW), Siberian coastal water (SCW), and remnant Pacific winter water (RWW). In some respects the Keywords: spatial distributions of these water masses were similar to the patterns found in the historical World Arctic Ocean Ocean Database, but there were significant differences. -
Arctic Ocean Bathymetry: a Necessary Geospatial Framework Martin Jakobsson,1 Larry Mayer2 and David Monahan2
ARCTIC VOL. 68, SUPPL. 1 (2015) P. 41 – 47 http://dx.doi.org/10.14430/arctic4451 Arctic Ocean Bathymetry: A Necessary Geospatial Framework Martin Jakobsson,1 Larry Mayer2 and David Monahan2 (Received 26 May 2014; accepted in revised form 8 December 2014) ABSTRACT. Most ocean science relies on a geospatial infrastructure that is built from bathymetry data collected from ships underway, archived, and converted into maps and digital grids. Bathymetry, the depth of the seafloor, besides having vital importance to geology and navigation, is a fundamental element in studies of deep water circulation, tides, tsunami forecasting, upwelling, fishing resources, wave action, sediment transport, environmental change, and slope stability, as well as in site selection for platforms, cables, and pipelines, waste disposal, and mineral extraction. Recent developments in multibeam sonar mapping have so dramatically increased the resolution with which the seafloor can be portrayed that previous representations must be considered obsolete. Scientific conclusions based on sparse bathymetric information should be re-examined and refined. At this time only about 11% of the Arctic Ocean has been mapped with multibeam; the rest of its seafloor area is portrayed through mathematical interpolation using a very sparse depth-sounding database. In order for all Arctic marine activities to benefit fully from the improvement that multibeam provides, the entire Arctic Ocean must be multibeam-mapped, a task that can be accomplished only through international coordination and collaboration that includes the scientific community, naval institutions, and industry. Key words: bathymetry; Arctic Ocean; mapping; oceanography; tectonics RÉSUMÉ. Une grande partie de l’océanographie s’appuie sur l’infrastructure géospatiale établie à partir de données bathymétriques recueillies par des navires en route, données qui sont ensuite archivées et transformées en cartes et en grilles numériques. -
Bathymetric Mapping of the North Polar Seas
BATHYMETRIC MAPPING OF THE NORTH POLAR SEAS Report of a Workshop at the Hawaii Mapping Research Group, University of Hawaii, Honolulu HI, USA, October 30-31, 2002 Ron Macnab Geological Survey of Canada (Retired) and Margo Edwards Hawaii Mapping Research Group SCHOOL OF OCEAN AND EARTH SCIENCE AND TECHNOLOGY UNIVERSITY OF HAWAII 1 BATHYMETRIC MAPPING OF THE NORTH POLAR SEAS Report of a Workshop at the Hawaii Mapping Research Group, University of Hawaii, Honolulu HI, USA, October 30-31, 2002 Ron Macnab Geological Survey of Canada (Retired) and Margo Edwards Hawaii Mapping Research Group Cover Figure. Oblique view of new eruption site on the Gakkel Ridge, observed with Seafloor Characterization and Mapping Pods (SCAMP) during the 1999 SCICEX mission. Sidescan observations are draped on a SCAMP-derived terrain model, with depths indicated by color-coded contour lines. Red dots are epicenters of earthquakes detected on the Ridge in 1999. (Data processing and visualization performed by Margo Edwards and Paul Johnson of the Hawaii Mapping Research Group.) This workshop was partially supported through Grant Number N00014-2-02-1-1120, awarded by the United States Office of Naval Research International Field Office. Partial funding was also provided by the International Arctic Science Committee (IASC), the US Polar Research Board, and the University of Hawaii. 2 Table of Contents 1. Introduction...............................................................................................................................5 Ron Macnab (GSC Retired) and Margo Edwards (HMRG) 2. A prototype 1:6 Million map....................................................................................................5 Martin Jakobsson, CCOM/JHC, University of New Hampshire, Durham NH, USA 3. Russian Arctic shelf data..........................................................................................................7 Volodja Glebovsky, VNIIOkeangeologia, St. Petersburg, Russia 4. -
Geophysical and Geological Exploration of the Eurasia Basin, Arctic Ocean from Ice Drift Stations “Fram-I-IV”
Bad Dürkheim 2001 88 Mitt. POLLICHIA 4 9 -5 4 2 Abb. (Suppl.) ISSN 0341-9665 Yngve K ristoffersen Geophysical and Geological Exploration of the Eurasia Basin, Arctic Ocean from Ice Drift Stations “Fram-I-IV” Kurzfassung Die Umwelt des Arktischen Meeres stellt eine logistische Herausforderung für die wissen schaftliche Erforschung dar. Ein Jahrhundert lang war das Ausnutzen von Treibeis als Plattform ein Eckpfeiler für Forschungsvorhaben im polaren Meer. Es erforderte Engagement und ein Langzeitdenken seitens der Geldgeber. Als wissenschaftlicher Leiter war Leonard Johnson we sentlich daran beteiligt, dass dies über einen Zeitraum von fast zwei Jahrzehnten der Fall war. Als Teil dieses Forschungsvorhaben arbeiteten die Treibeisstationen „Fram I—IV” im Frühjahrs- Wetterfenster 1979-1982 und trugen zur substanziellen Erforschung des Nördlichen Polarmee res bei. Abstract The Arctic Ocean environment presents a logistical challenge for scientific exploration. For a century the use of drifting sea ice as a platform was a comer stone for endeavours in the polar basin. It required committment and a long term perspective on the part of the funding agencies. As a science administrator, Leonard Johnson was instrumental in making this happen over a period of almost two decades. As a part of this, the “Fram I-IV” ice drift stations operated in the spring weather window of 1979-1982 and made a substantial contribution to exploration of the Eurasia Basin. Résumé L’environnement de l’océan glacial lance un défi logistique à l’exploration scientifique. Pen dant un siècle l’utilisation des glaces flottantes en tant que plate-forme était un pilier d’angle pour des travaux de recherche dans l’océan polaire. -
NSF 03-048, Arctic Research in the United States, Volume 17, Spring
This document has been archived. The Russian–American Initiative for Land–Shelf Environments in the Arctic Contributions to Arctic System Science This article was prepared The Russian–American Initiative for Land– projects involving both U.S. and Russian scien- by Lee W. Cooper, Shelf Environments (RAISE) is unique among tists have been initiated. Summaries of many of Department of Ecology research program and project components sup- these projects, both Russian and U.S. based, are and Evolutionary Biolo- ported by the National Science Foundation’s also available at http://arctic.bio.utk.edu/#raise, gy, University of Tennes- see, with assistance from (NSF) Arctic System Science Program (ARCSS). and a summary in written form has also been RAISE principal RAISE project implementation has been explicitly recently published. investigators. international, and the program is the only cooper- Despite this progress, the scale of research ative, bilateral research program supported by supported through RAISE has been limited by the both NSF and its Russian counterpart agency, the complexities of undertaking bilateral research in Russian Foundation for Basic Research (RFBR). the Russian Federation. Changing political reali- The goal of RAISE is to facilitate bilateral ties in both the United States and Russia, eco- (U.S.–Russian) research at the land–sea margin nomic dislocations that have affected the abilities in the Eurasian Arctic, focusing on the scientific of Russian scientists to pursue their vocations, challenges of environmental change in human logistical challenges in the Russian Arctic, and and biological communities and related physical the lack of high-level governmental agreements and chemical systems. -
Pleistocene-Holocene Permafrost of the East Siberian Eurasian Arctic Shelf
PLEISTOCENE-HOLOCENE PERMAFROST OF THE EAST SIBERIAN EURASIAN ARCTIC SHELF I.D. Danilov, I.A. Komarov, A.Yu. Vlasenko Department of Geology, Moscow State University, Moscow, Russia, 119899 e-mail: [email protected] Abstract Cryolithosphere dynamics in the East Siberian Eurasian Arctic shelf during the last 50,000 years were recon- structed on the basis of paleogeographic events including transgressions and regressions of the Arctic Ocean, and changes of paleoclimatic environmental conditions within subaerially exposed shelf areas after their flood- ing by sea water. Mathematical models and calculations were developed in accordance with these events. Three transgressive and three regressive stages in the evolution of the Arctic shelf were established for the last 50,000 years. Air and permafrost temperatures and their spatial and temporal variations were reconstructed for regres- sive epochs, while sea bottom temperatures, salinity and "overburden pressure" were reconstructed for trans- gressive periods. The possible thickness of permafrost in coastal areas is 345-455 m. The possible thickness of ice-bonded permafrost and non ice-bonded saline permafrost ranges from 240-350 and 20-25 m respectively in the central shelf, to 140-175 and 10 m in the outer shelf. Introduction Therefore, in order to solve this contradiction it is ne- cessary to estimate the extent of the Sartan regression. The formation of the modern subaquatic cryolithos- In the eastern sector of the Eurasian Arctic shelf, the sea phere (offshore permafrost) on the Eurasian Arctic shelf level fall is estimated variously at 110-120 m (Aksenov is usually assigned to the Pre-Holocene (Sartan) regres- et al., 1987), 100 m (Fartyshev, 1993), 90-100 m sion, and complete or partial degradation of the per- (Hopkins, 1976), 50 m (Zhigarev et al., 1982), and (mini- mafrost, to the subsequent (Flandrian) transgression. -
Geophysical Studies Bearing on the Origin of the Arctic Basin
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edicated to: My dear daughter Irina List of Papers This thesis is based on the following papers, which are referred to in the text by their Roman numerals. I Langinen A.E., Gee D.G., Lebedeva-Ivanova N.N. and Zamansky Yu.Ya. (2006). Velocity Structure and Correlation of the Sedimentary Cover on the Lomonosov Ridge and in the Amerasian Basin, Arctic Ocean. in R.A. Scott and D.K. Thurston (eds.) Proceedings of the Fourth International confer- ence on Arctic margins, OCS study MMS 2006-003, U.S. De- partment of the Interior, -
' ...An Arctic Basin Observational Capability Using Auvs
SPECIAL ISS UE ' .... An Arctic Basin Observational Capability using AUVs James G. Bellingham, Knut Streitlien Massachusetts Institute of Technology • Cambridge, Massachusetts USA James Overland Pacific Marine Environmental Laboratory * Seattle, Washington USA Subramaniam Rajah, Peter Stein Scientific Solutions Inc. • Hollis, New Hampshire USA John Stannard Fuel Cell Technologies Ltd. • Kingston, Ontario CANADA William Kirkwood Monterey Bay Aquarium Research Institute • Moss Landing, California USA Dana Yoerger Woods Hole Oceanographic Institution • Woods Hole, Massachusetts USA ~ ur goal is to greatly increase access to the (Sturgeon class) submarines available to the scien- Arctic Ocean by creating and demonstrating a tific community is 800 feet, this does not allow safe and economical platform capable of basin-scale characterization of the entire water column. surveys. Specifically, we are developing an • Nuclear submarines are expensive to maintain and Autonomous Underwater Vehicle (AUV) for Arctic operate. research with unprecedented endurance and the capa- bility to relay data through the ice to satellites. We will provide a means of monitoring changes taking place in the Arctic Ocean and investigate their impact on global warming. The vehicle will also be capable of seafloor surveys throughout the Arctic basin. We call the vehicle the ALTEX AUV (Figure 1), for the Altantic Layer Tracking Experiment that motivates its development. The Arctic Ocean poses unique challenges for oceanography because it is, for the most part, covered with sea ice. This makes the Arctic much more difficult to observe as the most widely used observational tech- niques today are either ship or satellite based. Much of our understanding of the Arctic Ocean comes from the use of nuclear submarines as research platforms. -
Crustal Architecture of the East Siberian Arctic Shelf and Adjacent Arctic Ocean Constrained by Seismic Data and Gravity Modeling Results
This is a repository copy of Crustal architecture of the East Siberian Arctic Shelf and adjacent Arctic Ocean constrained by seismic data and gravity modeling results. White Rose Research Online URL for this paper: http://eprints.whiterose.ac.uk/129730/ Version: Accepted Version Article: Drachev, SS, Mazur, S, Campbell, S et al. (2 more authors) (2018) Crustal architecture of the East Siberian Arctic Shelf and adjacent Arctic Ocean constrained by seismic data and gravity modeling results. Journal of Geodynamics, 119. pp. 123-148. ISSN 0264-3707 https://doi.org/10.1016/j.jog.2018.03.005 Crown Copyright © 2018 Published by Elsevier Ltd. This is an author produced version of a paper published in Journal of Geodynamics. Uploaded in accordance with the publisher's self-archiving policy. This manuscript version is made available under the Creative Commons CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/. Reuse This article is distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs (CC BY-NC-ND) licence. This licence only allows you to download this work and share it with others as long as you credit the authors, but you can’t change the article in any way or use it commercially. 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. -
An East Siberian Ice Shelf During the Late Pleistocene Glaciations: Numerical Reconstructions
Quaternary Science Reviews xxx (2016) 1e16 Contents lists available at ScienceDirect Quaternary Science Reviews journal homepage: www.elsevier.com/locate/quascirev An East Siberian ice shelf during the Late Pleistocene glaciations: Numerical reconstructions * Florence Colleoni a, , Nina Kirchner b, Frank Niessen d,Aurelien Quiquet a, Johan Liakka c a Centro Euro-Mediterraneo sui Cambiamenti Climatici, Bologna, Italy b Department of Physical Geography, Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden c Biodiversity and Climate Research Centre, Frankfurt am Main, Germany d Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany article info abstract Article history: A recent data campaign in the East Siberian Sea has revealed evidence of grounded and floating ice Received 25 May 2015 dynamics in regions of up to 1000 m water depth, and which are attributed to glaciations older than the Received in revised form Last Glacial Maximum (21 kyrs BP). The main hypothesis based on this evidence is that a small ice cap 26 November 2015 developed over Beringia and expanded over the East Siberian continental margin during some of the Late Accepted 21 December 2015 Pleistocene glaciations. Other similar evidence of ice dynamics that have been previously collected on the Available online xxx shallow continental shelves of the Arctic Ocean have been attributed to the penultimate glaciation, i.e. Marine Isotopes Stage 6 (z140 kyrs BP). We use an ice sheet model, forced by two previously simulated Keywords: Late Pleistocene glaciations MIS 6 glacial maximum climates, to carry out a series of sensitivity experiments testing the impact of Arctic ocean dynamics and mass-balance related parameters on the geometry of the East Siberian ice cap and ice East Siberian ice shelf shelf. -
Arctic Operations
60 Years of Marine Nuclear Power: 1955 – 2015 Part 5: Arctic Operations Peter Lobner August 2015 Foreword This is Part 5 of a rather lengthy presentation that is my attempt to tell a complex story, starting from the early origins of the U.S. Navy’s interest in marine nuclear propulsion in 1939, resetting the clock on 17 January 1955 with the world’s first “underway on nuclear power” by the USS Nautilus, and then tracing the development and exploitation of nuclear propulsion over the next 60 years in a remarkable variety of military and civilian vessels created by eight nations. I acknowledge the great amount of work done by others who have posted information on the internet on international marine nuclear propulsion programs, naval and civilian nuclear vessels and naval weapons systems. My presentation contains a great deal of graphics from many internet sources. Throughout the presentation, I have made an effort to identify all of the sources for these graphics. If you have any comments or wish to identify errors in this presentation, please send me an e-mail to: [email protected]. I hope you find this presentation informative, useful, and different from any other single document on this subject. Best regards, Peter Lobner August 2015 Arctic Operations Basic orientation to the Arctic region Dream of the Arctic submarine U.S. nuclear marine Arctic operations Russian nuclear marine Arctic operations Current trends in Arctic operations Basic orientation to the Arctic region Arctic boundary as defined by the Arctic Research and Policy Act Bathymetric / topographic features in the Arctic Ocean Source: https://en.wikipedia.org/wiki/Mendeleev_Ridge Arctic territorial claims Source: www.wired.com Source: Encyclopedia Britannica Maritime zones & sovereignty Source: http://continentalshelf.gov/media/ECSposterDec2010.pdf Northern Sea Route Source: The New York Times Northern Sea Route Northern Sea Route, also known as Northeast Passage, is a water route along the northern coast of Russia, between the Atlantic and Pacific oceans.