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  • 1
    Online Resource
    Online Resource
    Arctic and Environmental Change. (1997)
    Milton :CRC Press LLC,
    Details
    Keywords: Ecology-Arctic regions-Congresses. ; Greenhouse effect, Atmospheric-Arctic regions-Congresses. ; Nature-Effect of human beings on-Arctic regions. ; Arctic regions-Environmental conditions-Congresses. ; Electronic books.
    Description / Table of Contents: Presented at The Arctic and Environmental Change meeting held by the Royal Society in October 1994, the fourteen papers which form the basis of this book contain a wide-ranging review of Arctic environmental change in response to global warming, and also give a broad insight into the transformation of the Arctic which we can expect during the next century. It will be an invaluable reference for anyone seeking a greater understanding of the factors and processes affecting the Arctic environment which may ultimately have a major impact on global climatic change.
    Type of Medium: Online Resource
    Pages: 1 online resource (206 pages)
    Edition: 1st ed.
    ISBN: 9781351465656
    URL: https://ebookcentral.proquest.com/lib/geomar/detail.action?docID=5898108
    DDC: 363.7387420911
    Language: English
    Note: Cover -- Half Title -- Title Page -- Copyright Page -- Table of Contents -- Preface -- Modelling Arctic climate change -- Variability in atmospheric circulation and moisture flux over the Arctic -- The stratospheric polar vortex and sub-vortex: fluid dynamics and mid-latitude ozone loss -- Ozone loss in middle latitudes and the role of the Arctic polar vortex -- Solar irradiance, air pollution and temperature changes in the Arctic -- Arctic terrestrial ecosystems and environmental change -- Climate change and biological oceanography of the Arctic Ocean -- The thermohaline circulation of the Arctic Ocean and the Greenland Sea -- Arctic sea ice extent and thickness -- Glaciers in the High Arctic and recent environmental change -- Elevation change of the Greenland Ice Sheet and its measurement with satellite radar altimetry -- Permafrost and climate change: geotechnical implications -- Greenland ice core records and rapid climate change -- Non-steady behaviour in the Cenozoic polar North Atlantic system: the onset and variability of Northern Hemisphere glaciations -- Index.
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  • 2
    Book
    Book
    The arctic and environmental change. [on October 12-13 1994 the Royal Society held a Discussion Meeting on the Arctic and Environmental Change] (1996)
    Amsterdam, The Netherlands : Gordon and Breach Pub
    Details Availability
    Keywords: Ecology Congresses ; Nature Effect of human beings on ; Greenhouse effect, Atmospheric Congresses ; Arctic regions Congresses Environmental conditions ; Aufsatzsammlung ; Arktis ; Umweltbelastung ; Anthropogener Einfluss ; Arktis ; Treibhauseffekt ; Anthropogener Einfluss ; Arktis ; Meereskunde ; Arktis ; Umweltbelastung ; Anthropogener Einfluss ; Arktis ; Treibhauseffekt ; Anthropogener Einfluss ; Arktis ; Meereskunde
    Type of Medium: Book
    Pages: XI, 193 S , Ill., graph. Darst., Kt
    ISBN: 9056990209
    URL: http://www.gbv.de/dms/goettingen/244249598.pdf
    URL: http://www.loc.gov/catdir/enhancements/fy0731/99457378-d.html
    DDC: 333.7'0998
    RVK:
    RY 30066
    RVK:
    RY 30915
    Language: English
    Note: Originally publ. in Philosophical Transactions of The Royal Society, Series A, Vol. 353, Number 1699, pp 197 - 385 , Originally publ. in journal form as Philosophical transactions of The Royal Society, series A, Vol. 352, Nr. 1699, S. 197 - 385, 1995
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  • 3
    Electronic Resource
    Electronic Resource
    Asynchronous deposition of ice-rafted layers in the Nordic seas and North Atlantic Ocean (1999)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 400 (1999), S. 348-351 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Instabilities in ice-stream flow within the North American Laurentide Ice Sheet, leading to the periodic release of armadas of icebergs into the North Atlantic Ocean over the past 60,000 years, have produced extensive layers of coarse-grained iceberg-rafted debris (Heinrich layers) in North ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/22510
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    On the origin and flow behavior of submarine slides on deep-sea fans along the Norwegian–Barents Sea continental margin (1997)
    Springer
    Geo-marine letters 17 (1997), S. 119-125 
    Details
    ISSN: 1432-1157
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  Debris lobes with characteristic lengths, widths, and thickness of 30–200 km, 2–10 km, and 10–50 m, respectively, represent the main building blocks of deep-sea fans along the Norwegian–Barents Sea continental margin. Their formation is closely related to the input of clay-rich sediments to the upper continental slope by glaciers during periods of maximum ice advance. It is likely that slide release was a consequence of an instability arising from high sedimentation rates on the upper continental slope. The flow behavior of the debris lobes can be described by a Bingham flow model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003670050016
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  • 5
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    Physiographic influences on dense shelf-water cascading down the Antarctic continental slope (2018)
    Elsevier
    In:  Earth-Science Reviews, 185 . pp. 887-900.
    Details
    Publication Date: 2021-02-08
    Description: Predicting the source areas for Antarctic Bottom Water (AABW) requires knowledge of how cold, dense water masses form and move from the Antarctic shelves to the continental slope. Here we use a review of nearly 50 years of direct hydrographic observations to infer the main broad-scale influences on the distribution of dense shelf-water (DSW) overflows that cascade down the continental slope around Antarctica. The dynamics and distribution of large ice shelves, coastal polynyas and the physiography of the Antarctic continental shelves are each considered. The catalogue we present increases the number of DSW observations to 27, adds 20 additional stations where this process is likely to have occurred, and identifies 41 areas where DSW appears to be absent. Our pan-Antarctic, multi-decadal review enhances the understanding of the formation and export of DSW and highlights the variability and complexity of ice-ocean systems on high-latitude continental margins. The study also provides a context for understanding recent episodes of Antarctic ice-shelf instability, and how the relationship between DSW and AABW may evolve with climatic and oceanographic changes.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1016/j.earscirev.2018.07.014
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 6
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    BedMachine v3: Complete Bed Topography and Ocean Bathymetry Mapping of Greenland From Multibeam Echo Sounding Combined With Mass Conservation (2017)
    AGU (American Geophysical Union) | Wiley
    In:  Geophysical Research Letters, 44 (21). 11.051-11.061.
    Details
    Publication Date: 2020-02-06
    Description: Greenland's bed topography is a primary control on ice flow, grounding line migration, calving dynamics, and subglacial drainage. Moreover, fjord bathymetry regulates the penetration of warm Atlantic water (AW) that rapidly melts and undercuts Greenland's marine-terminating glaciers. Here we present a new compilation of Greenland bed topography that assimilates seafloor bathymetry and ice thickness data through a mass conservation approach. A new 150 m horizontal resolution bed topography/bathymetric map of Greenland is constructed with seamless transitions at the ice/ocean interface, yielding major improvements over previous data sets, particularly in the marine-terminating sectors of northwest and southeast Greenland. Our map reveals that the total sea level potential of the Greenland ice sheet is 7.42 ± 0.05 m, which is 7 cm greater than previous estimates. Furthermore, it explains recent calving front response of numerous outlet glaciers and reveals new pathways by which AW can access glaciers with marine-based basins, thereby highlighting sectors of Greenland that are most vulnerable to future oceanic forcing.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1002/2017GL074954
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 7
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    Large-scale sedimentation on the glacier-influenced polar North Atlantic Margins: Long-range side-scan sonar evidence (1996)
    AGU (American Geophysical Union)
    In:  Geophysical Research Letters, 23 (24). pp. 3535-3538.
    Details
    Publication Date: 2018-01-31
    Description: Long-range side-scan sonar (GLORIA) imagery of over 600,000 km² of the Polar North Atlantic provides a large-scale view of sedimentation patterns on this glacier-influenced continental margin. High-latitude margins are influenced strongly by glacial history and ice dynamics and, linked to this, the rate of sediment supply. Extensive glacial fans (up to 350,000 km³) were built up from stacked series of large debris flows transferring sediment down the continental slope. The fans were linked with high debris inputs from Quaternary glaciers at the mouths of cross-shelf troughs and deep fjords. Where ice was slower-moving, but still extended to the shelf break, large-scale slide deposits are observed. Where ice failed to cross the continental shelf during full glacials, the continental slope was sediment starved and submarine channels and smaller slides developed. A simple model for large-scale sedimentation on the glaciated continental margins of the Polar North Atlantic is presented.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1029/96GL03484
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  • 8
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    Bathymetry data reveal glaciers vulnerable to ice-ocean interaction in Uummannaq and Vaigat glacial fjords, west Greenland (2016)
    AGU (American Geophysical Union) | Wiley
    In:  Geophysical Research Letters, 43 (6). pp. 2667-2674.
    Details
    Publication Date: 2019-02-01
    Description: Marine-terminating glaciers play a critical role in controlling Greenland's ice sheet mass balance. Their frontal margins interact vigorously with the ocean, but our understanding of this interaction is limited, in part, by a lack of bathymetry data. Here we present a multibeam echo sounding survey of 14 glacial fjords in the Uummannaq and Vaigat fjords, west Greenland, which extends from the continental shelf to the glacier fronts. The data reveal valleys with shallow sills, overdeepenings (〉 1300 m) from glacial erosion, and seafloor depths 100-1000 m deeper than in existing charts. Where fjords are deep enough, we detect the pervasive presence of warm, salty Atlantic Water (AW) (〉 2.5 degrees C) with high melt potential, but we also find numerous glaciers grounded on shallow (〈 200 m) sills, standing in cold (〈 1 degrees C) waters in otherwise deep fjords, i.e., with reduced melt potential. Bathymetric observations extending to the glacier fronts are critical to understand the glacier evolution.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1002/2016GL067832
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  • 9
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    Mapping submarine glacial landforms using acoustic methods (2016)
    Geological Society
    In:  In: Atlas of submarine glacial landforms. , ed. by Dowdeswell, J. A., Canals, M., Jakobsson, M., Todd, B. J., Dowdeswell, E. K. and Hogan, K. A. Geological Society London Memoirs, 46 . Geological Society, London, pp. 17-40.
    Details
    Publication Date: 2017-02-14
    Description: The mapping of submarine glacial landforms is largely dependent on marine geophysical survey methods capable of imaging the seafloor and sub-bottom through the water column. Full global coverage of seafloor mapping, equivalent to that which exists for the Earth's land surface, has, to date, only been achieved by deriving bathymetry from radar altimeters on satellites such as GeoSat and ERS-1 (Smith & Sandwell 1997). The horizontal resolution is limited by the footprint of the satellite sensors and the need to average out local wave and wind effects, resulting in a cell size of about 15 km (Sandwell et al. 2001). A further problem in high latitudes is that the altimeter data are extensively contaminated by the presence of sea ice, which degrades the derived bathymetry (McAdoo & Laxon 1997). Consequently, the satellite altimeter method alone is not suitable for mapping submarine glacial landforms, given that their morphological characterization usually requires a much finer level of detail. Acoustic mapping methods based on marine echo-sounding principles are currently the most widely used techniques for mapping submarine glacial landforms because they are capable of mapping at a much higher resolution.
    Type: Book chapter , NonPeerReviewed
    Format: text
    DOI: 10.1144/M46.182
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  • 10
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    The variety and distribution of submarine glacial landforms and implications for ice-sheet reconstruction (2016)
    Geological Society
    In:  In: Atlas of submarine glacial landforms. , ed. by Dowdeswell, J. A., Canals, M., Jakobsson, M., Todd, B. J., Dowdeswell, E. K. and Hogan, K. A. Geological Society London Memoirs, 46 . Geological Society, London, pp. 519-552.
    Details
    Publication Date: 2017-03-10
    Description: Glacimarine processes affect about 20% of the global ocean today, and this area expanded considerably under cyclical full-glacial conditions during the Quaternary (Fig. 1) (Dowdeswell et al. 2016b). Many of the submarine landforms produced at the base and margin of past ice sheets remain well preserved on the seafloor in fjords and on high-latitude continental shelves after the retreat of the ice that produced them. These glacial landforms, protected from subaerial erosion and beneath wave-base and tidal currents in water that is often hundreds of metres deep, are gradually buried by both hemipelagic and glacimarine sedimentation; they may be preserved over long periods in the geological record if palaeo-continental shelves are not reworked by subsequent glacier advances or bottom currents (Dowdeswell et al. 2007). This means that, first, submarine glacial landforms can be observed at or close to the modern seafloor after retreat of the last great ice sheets from their most recent Quaternary maximum about 18–20 000 years ago using swath-bathymetric mapping systems and, secondly, buried glacial landforms may also be identified and examined within glacial-sedimentary sequences from Quaternary and earlier ice ages using seismic-reflection methods.
    Type: Book chapter , NonPeerReviewed
    DOI: 10.1144/M46.183
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