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  • 1
    Online Resource
    Online Resource
    San Diego :Elsevier Science & Technology,
    Keywords: Climatic changes -- Antarctica. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (606 pages)
    Edition: 1st ed.
    ISBN: 9780080931616
    DDC: 571.8
    Language: English
    Note: Front cover -- Antarctic Climate Evolution -- Copyright page -- Contents -- Preface -- Chapter 1. Antarctic Climate Evolution -- 1.1. Introduction -- 1.2. Antarctic Glacial History -- 1.3. Structure and Content of the Book -- References -- Chapter 2. The International Polar Years: A History of Developments in Antarctic Climate Evolution -- 2.1. Introduction -- 2.2. The First International Polar Year (1882-1883) -- 2.3. The Second International Polar Year (1932-1933) -- 2.4. The Third International Polar YearsolInternational Geophysical Year (1957-1958) -- 2.5. The Fourth International Polar Year (2007-2008) -- References -- Chapter 3. A History of Antarctic Cenozoic Glaciation - View from the Margin -- 3.1. Introduction -- 3.2. Mid-Twentieth Century Advances (1956-1972) -- 3.3. First Antarctic Drilling (1972-1975) -- 3.4. Developments in Drilling and Thinking in the Late 1970s -- 3.5. Discoveries Offshore and on the Continent in the 1980s -- 3.6. Advances in the 1990s -- 3.7. Advances in the First Decade of the Twenty-First Century -- 3.8. Future Prospects for Improving Knowledge of the History of the Antarctic Ice Sheet -- Acknowledgements -- References -- Chapter 4. Circulation and Water Masses of the Southern Ocean: A Review -- 4.1. Introduction -- 4.2. Water Mass Formation and Dispersal -- 4.3. Ocean Circulation -- 4.4. Oceanographic Variability and Change -- Acknowledgements -- References -- Chapter 5. Cenozoic Climate History from Seismic Reflection and Drilling Studies on the Antarctic Continental Margin -- 5.1. Introduction -- 5.2. Ross Sea (G. Brancolini and G. Leitchenkov) -- 5.3. Wilkes Land (C. Escutia and P. O'Brien) -- 5.4. Prydz Bay (P. O'Brien and G. Leitchenkov) -- 5.5. Weddell Sea (Y. Kristoffersen and W. Jokat) -- 5.6. Antarctic Peninsula (R. Larter) -- 5.7. Other Sectors of the Antarctic Continental Margin -- 5.8. Discussion. , 5.9. Summary -- Acknowledgements -- References -- Foldouts -- Chapter 6. Numerical Modelling of the Antarctic Ice Sheet -- 6.1. Introduction -- 6.2. Ice-Sheet Processes -- 6.3. Ice-Sheet Models -- 6.4. Model Inputs -- 6.5. EISMINT -- 6.6. Comparing Ice-Sheet Models with Antarctic Glaciological Data -- 6.7. Ice-Sheet Reconstructions -- 6.8. Summary -- References -- Chapter 7. The Antarctic Continent in Gondwanaland: A Tectonic Review and Potential Research Targets for Future Investigations -- 7.1. Introduction -- 7.2. The Present-Day Geotectonic Setting of Antarctica -- 7.3. The Main Geological Units of Antarctica Before Gondwana Amalgamation -- 7.4. Antarctica in the Gondwana Supercontinent -- 7.5. Antarctic Record of Gondwana Break-Up and Dispersal of the Southern Hemisphere Continents -- 7.6. Open Problems and Potential Research Themes for Future Geoscience Investigations in Antarctica -- Acknowledgements -- References -- Chapter 8. From Greenhouse to Icehouse - The EocenesolOligocene in Antarctica -- 8.1. Introduction -- 8.2. Climate Signals from the Sedimentary Record -- 8.3. Climate Signals from the Terrestrial Realm - Fossil Plants and Palynomorphs -- 8.4. Environmental Changes Documented by Marine Microfossils -- 8.5. Evolution of Ocean Temperatures and Global Ice Volume During the Eocene to Oligocene from the Ocean Isotope Record -- 8.6. Connection of CO2 and Ice-Sheet Inception at the E/O Boundary - Computer Modelling -- 8.7. Summary -- Acknowledgements -- References -- Chapter 9. The Oligocene-Miocene Boundary - Antarctic Climate Response to Orbital Forcing -- 9.1. Introduction -- 9.2. Proxy Records -- 9.3. Records from the Antarctic Margin -- 9.4. Possible Drivers of Change Across the Oligocene-Miocene Boundary -- 9.5. Summary and Conclusions -- References. , Chapter 10. Middle Miocene to Pliocene History of Antarctica and the Southern Ocean -- 10.1. Introduction -- 10.2. East Antarctic Terrestrial Environments -- 10.3. West Antarctic Terrestrial Environments -- 10.4. The Marine Record of the East Antarctic Ice Sheet -- 10.5. The Marine Record of the West Antarctic and Antarctic Peninsula Ice Sheets -- 10.6. Marine Records of the Southern Ocean -- 10.7. Modelling Antarctic Climates and Ice Sheets -- 10.8. Summary -- Acknowledgements -- References -- Chapter 11. Late Pliocene-Pleistocene Antarctic Climate Variability at Orbital and Suborbital Scale: Ice Sheet, Ocean and Atmospheric Interactions -- 11.1. Introduction -- 11.2. Glacial Variability from the Continental Margin Geological Record -- 11.3. Atmospheric Variability from Ice Cores -- 11.4. Oceanic Variability from Southern Ocean Sediment Cores -- 11.5. Modelling of Pleistocene Ice Volume Variations -- 11.6. Synthesis: Antarctic Climate Evolution Since sim3Ma -- Acknowledgements -- References -- Chapter 12. Antarctica at the Last Glacial Maximum, Deglaciation and the Holocene -- 12.1. Introduction -- 12.2. Response of the Ice Sheets to Glacial Climate and Late Quaternary Ice-Sheet Reconstructions -- 12.3. Geological Information -- 12.4. Numerical Modelling Reconstructions -- 12.5. Summary -- References -- Chapter 13. Concluding Remarks: Recent Changes in Antarctica and Future Research -- References -- Subject Index.
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  • 2
    Online Resource
    Online Resource
    Newark :American Geophysical Union,
    Keywords: Subglacial lakes -- Polar regions -- Discovery and exploration. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (255 pages)
    Edition: 1st ed.
    ISBN: 9781118672310
    Series Statement: Geophysical Monograph Series ; v.192
    Language: English
    Note: Intro -- Title Page -- Contents -- Preface -- Section I: History and Background -- Subglacial Aquatic Environments: A Focus of 21st Century Antarctic Science -- The Identification and Physiographical Setting of Antarctic Subglacial Lakes: An Update Based on Recent Discoveries -- Antarctic Subglacial Lake Discharges -- Section II: Vostok Subglacial Lake and Recognition of Subglacial Aquatic Environments -- Vostok Subglacial Lake: A Review of Geophysical Data Regarding Its Discovery and Topographic Setting -- Microbial Communities in Antarctic Subglacial Aquatic Environments -- Subglacial Lake Sediments and Sedimentary Processes: Potential Archives of Ice Sheet Evolution, Past Environmental Change, and t -- The Geomorphic Signature of Massive Subglacial Floods in Victoria Land, Antarctica -- Subglacial Environments and the Search for Life Beyond the Earth -- Section III: Future Exploration Missions -- Environmental Protection and Stewardship of Subglacial Aquatic Environments -- Probe Technology for the Direct Measurement and Sampling of Ellsworth Subglacial Lake -- Vostok Subglacial Lake: Details of Russian Plans/Activities for Drilling and Sampling -- Siple Coast Subglacial Aquatic Environments: The Whillans Ice Stream Subglacial Access Research Drilling Project -- Ellsworth Subglacial Lake, West Antarctica: A Review of Its History and Recent Field Campaigns -- AGU Category Index -- Index.
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  • 3
    Online Resource
    Online Resource
    San Diego :Elsevier,
    Keywords: Ice sheets-Antarctica. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (806 pages)
    Edition: 2nd ed.
    ISBN: 9780128191101
    DDC: 571.8
    Language: English
    Note: Front Cover -- Antarctic Climate Evolution -- Copyright Page -- Contents -- List of contributors -- Preface -- 1 Antarctic Climate Evolution - second edition -- 1.1 Introduction -- 1.2 Structure and content of the book -- Acknowledgements -- References -- 2 Sixty years of coordination and support for Antarctic science - the role of SCAR -- 2.1 Introduction -- 2.2 Scientific value of research in Antarctica and the Southern Ocean -- 2.3 The international framework in which SCAR operates -- 2.4 The organisation of SCAR -- 2.5 Sixty years of significant Antarctic science discoveries -- 2.6 Scientific Horizon Scan -- 2.7 Summary -- References -- Appendix -- 3 Cenozoic history of Antarctic glaciation and climate from onshore and offshore studies -- 3.1 Introduction -- 3.2 Long-term tectonic drivers and ice sheet evolution -- 3.3 Global climate variability and direct evidence for Antarctic ice sheet variability in the Cenozoic -- 3.3.1 Late Cretaceous to early Oligocene evidence of Antarctic ice sheets and climate variability -- 3.3.2 The Eocene-Oligocene transition and continental-scale glaciation of Antarctica -- 3.3.3 Transient glaciations of the Oligocene and Miocene -- 3.3.4 Pliocene to Pleistocene -- 3.4 Regional seismic stratigraphies and drill core correlations, and future priorities to reconstruct Antarctica's Cenozoic... -- 3.4.1 Ross Sea -- 3.4.2 Amundsen Sea -- 3.4.3 Bellingshausen Sea and Pacific coastline of Antarctic Peninsula -- 3.4.4 The Northern Antarctic Peninsula and South Shetland Islands -- 3.4.5 The Eastern Margin of the Antarctic Peninsula -- 3.4.6 The South Orkney Microcontinent and adjacent deep-water basins -- 3.4.7 East Antarctic Margin -- 3.4.7.1 Weddell Sea -- 3.4.7.1.1 Gondwana break-up, Weddell Sea opening and pre-ice-sheet depositional environment. , 3.4.7.1.2 The Eocene-Oligocene transition and paleoenvironment during increasing glacial conditions -- 3.4.7.1.3 Recent geophysical survey beneath the Ekström Ice Shelf and future directions for drilling -- 3.4.7.2 Prydz Bay -- 3.4.7.2.1 Early Cenozoic greenhouse and earliest glacial phase in late Eocene -- 3.4.7.2.2 Oligocene-Miocene ice-sheet development -- 3.4.7.2.3 The Polar Ice Sheet (late Miocene(?)-Pleistocene) -- 3.4.7.3 East Antarctic Margin - Sabrina Coast -- 3.4.7.4 Wilkes Land margin and Georges V Land -- 3.5 Summary, future directions and challenges -- Acknowledgements -- References -- 4 Water masses, circulation and change in the modern Southern Ocean -- 4.1 Introduction -- 4.1.1 Defining the Southern Ocean -- 4.2 Water masses - characteristics and distribution -- 4.2.1 Upper ocean -- 4.2.2 Intermediate depth waters -- 4.2.3 Deep water -- 4.2.4 Bottom water -- 4.3 Southern Ocean circulation -- 4.3.1 Antarctic Circumpolar Current (ACC) -- 4.3.2 Southern Ocean meridional overturning circulation (SOMOC) -- 4.3.3 Deep western boundary currents -- 4.3.3.1 Pacific deep western boundary current -- 4.3.3.2 Indian deep western boundary currents -- 4.3.3.3 Atlantic deep western boundary current -- 4.3.4 Subpolar circulation - gyres, slope and coastal currents -- 4.3.4.1 Gyres -- 4.3.4.2 Antarctic slope and coastal currents -- 4.4 Modern Southern Ocean change -- 4.4.1 Climate change -- 4.4.2 Ocean change -- 4.4.3 Change in dynamics and circulation -- 4.5 Concluding remarks -- References -- 5 Advances in numerical modelling of the Antarctic ice sheet -- 5.1 Introduction and aims -- 5.2 Advances in ice sheet modelling -- 5.2.1 Grounding line physics -- 5.2.2 Adaptive grids -- 5.2.3 Parallel ice sheet model - PISM -- 5.2.4 Coupled models -- 5.3 Model input - bed data -- 5.4 Advances in knowledge of bed processes -- 5.5 Model intercomparison. , 5.6 Brief case studies -- 5.7 Future work -- References -- 6 The Antarctic Continent in Gondwana: a perspective from the Ross Embayment and Potential Research Targets for Future Inve... -- 6.1 Introduction -- 6.2 The Antarctic plate and the present-day geological setting of the Ross Embayment -- 6.3 East Antarctica -- 6.3.1 The Main Geological Units during the Paleoproterozoic-Early Neoproterozoic Rodinia Assemblage -- 6.3.2 From Rodinia breakup to Gondwana (c. 800-650Ma) -- 6.3.3 The 'Ross Orogen' in the Transantarctic Mountains during the late Precambrian-early Paleozoic evolution of the paleo-... -- 6.4 West Antarctic Accretionary System -- 6.4.1 West Antarctica in the Precambrian to Mesozoic (c. 180Ma) evolution of Gondwana until the middle Jurassic breakup -- 6.4.1.1 Precambrian to Cambrian metamorphic basement -- 6.4.1.2 Devono-Carboniferous arc magmatism ('Borchgrevink Event') (c. 370-350Ma) -- 6.4.1.3 Beacon Supergroup (Devonian-Permo-Triassic-earliest Jurassic) -- 6.4.1.4 The Ellsworth-Whitmore Mountains Terrane and the Permo-Triassic arc magmatism -- 6.4.1.5 Ferrar Supergroup and the Gondwana breakup (c. 180Ma) -- 6.4.1.6 The Antarctic Andean Orogen -- 6.5 Mesozoic to Cenozoic Tectonic Evolution of the Transantarctic Mountains -- 6.6 Tectonic evolution in the Ross Sea Sector during the Cenozoic -- 6.7 Concluding remarks, open problems and potential research themes for future geoscience investigations in Antarctica -- 6.7.1 Persistent challenges for onshore geoscience investigations -- 6.7.2 Antarctica and the Ross Orogen in the Transantarctic Mountains -- 6.7.3 Antarctica after Gondwana fragmentation -- Acknowledgements -- References -- 7 The Eocene-Oligocene boundary climate transition: an Antarctic perspective -- 7.1 Introduction -- 7.2 Background -- 7.2.1 Plate tectonic setting -- 7.2.2 Antarctic paleotopography. , 7.2.3 Paleoceanographic setting -- 7.2.4 Global average and regional sea level response -- 7.2.5 Proxies to reconstruct past Antarctic climatic and environmental evolution -- 7.2.6 Far-field proxies -- 7.3 Antarctic Sedimentary Archives -- 7.3.1 Land-based outcrops -- 7.3.1.1 Antarctic Peninsula Region -- 7.3.1.2 King George (25 de Mayo) Island, South Shetland Islands -- 7.3.1.3 The Ross Sea Region -- 7.3.2 Sedimentary archives from drilling on the Antarctic Margin -- 7.3.2.1 Drill cores in the western Ross Sea -- 7.3.2.2 The Prydz Bay Region -- 7.3.2.3 Weddell Sea -- 7.3.2.4 Wilkes Land -- 7.4 Summary of climate signals from Antarctic sedimentary archives -- 7.4.1 Longer-term changes -- 7.4.2 The climate of the Eocene-Oligocene transition -- 7.5 The global context of Earth and climate system changes across the EOT -- 7.5.1 Climate modelling -- 7.5.2 Relative sea-level change around Antarctica -- 7.6 Summary -- 7.6.1 Early-middle Eocene polar warmth -- 7.6.2 Late Eocene cooling -- 7.6.3 Eocene-Oligocene transition -- Acknowledgements -- References -- 8 Antarctic Ice Sheet dynamics during the Late Oligocene and Early Miocene: climatic conundrums revisited -- 8.1 Introduction -- 8.2 Oligocene-Miocene Transition in Antarctic geological records and its climatic significance -- 8.3 Conundrums revisited -- 8.3.1 What caused major transient glaciation of Antarctica across the OMT? -- 8.3.2 Apparent decoupling of Late Oligocene climate and ice volume? -- 8.4 Concluding remarks -- Acknowledgements -- References -- 9 Antarctic environmental change and ice sheet evolution through the Miocene to Pliocene - a perspective from the Ross Sea ... -- 9.1 Introduction -- 9.1.1 Overview and relevance -- 9.1.2 Far-field records of climate and ice sheet variability -- 9.1.2.1 The Early Miocene -- 9.1.2.2 The mid-Miocene -- 9.1.2.3 The Late Miocene -- 9.1.2.4 The Pliocene. , 9.1.3 Southern Ocean Paleogeography and Paleoceanography -- 9.1.4 Land elevation change and influences on Antarctic Ice Sheet evolution -- 9.2 Records of Miocene to Pliocene climate and ice sheet variability from the Antarctic margin -- 9.2.1 Introduction to stratigraphic records -- 9.2.2 George V Land to Wilkes Land Margin -- 9.2.2.1 Geological setting -- 9.2.2.2 Oceanography of the Adélie coast -- 9.2.2.3 Seismic stratigraphy off the George V Land to Wilkes Land Margin -- 9.2.2.4 Drill core records from the George V Land to Wilkes Land Margin -- 9.2.2.5 Neogene history of the George V Land to Wilkes Land margin -- 9.2.3 The Ross Sea Embayment and Southern Victoria Land -- 9.2.3.1 Geological setting -- 9.2.3.2 Oceanography and climate in the Ross Sea Region -- 9.2.3.3 Seismic stratigraphic records in the Ross Sea -- 9.2.3.4 Stratigraphic records from drill cores in the Ross Sea -- 9.2.3.5 Terrestrial records from Southern Victoria Land -- 9.2.3.6 Neogene history in the Ross Sea Region -- 9.3 Numerical modelling -- 9.3.1 Miocene -- 9.3.2 Pliocene -- 9.4 Synthesis/summary of key climate episodes and transitions in Antarctica through the Miocene and Pliocene -- 9.4.1 Early to mid-Miocene -- 9.4.2 Miocene Climate Optimum -- 9.4.3 Miocene Climate Transition -- 9.4.4 Late Miocene -- 9.4.5 Pliocene -- 9.5 Next steps -- Acknowledgements -- References -- 10 Pleistocene Antarctic climate variability: ice sheet, ocean and climate interactions -- 10.1 Background and motivation -- 10.1.1 Introduction -- 10.1.2 Orbital cyclicity and climate -- 10.1.3 Antarctic feedbacks in the global climate system -- 10.1.4 Strengths of Pleistocene research on Antarctica -- 10.2 Archives of Pleistocene Antarctic climate and climate-relevant processes -- 10.2.1 Polar ice cores -- 10.2.1.1 Background and characteristics of ice core records -- 10.2.1.2 Ice core climate proxies. , 10.2.1.3 Recent advances in ice core proxies and attempts to obtain ice older than one million years.
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  • 4
    Keywords: Aufsatzsammlung ; Antarktis ; Glazialgeologie ; Gletscher ; Glaziologie ; Aufsatzsammlung ; Antarktis ; Geologie ; Grundwasser ; Lake Vostok ; Antarktis ; Glazialgeologie ; Gletscher ; Glaziologie ; Aufsatzsammlung ; Antarktis ; Geologie ; Grundwasser ; Lake Vostok
    Type of Medium: Online Resource
    Pages: 1 Online-Resource (vi, 255 Seiten) , Illustrationen, Diagramme, Karten
    Series Statement: Geological society special publications 461
    DDC: 551.31309989
    RVK:
    Language: English
    Note: Dateiformat Volltext: PDF, abstracts
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  • 5
    Keywords: Climatic changes ; Ice sheets ; Glacial epoch ; Paleoclimatology Cenozoic ; Paleoclimatology ; Antarctica Climate ; Aufsatzsammlung ; Antarktis ; Känozoikum ; Klimaänderung
    Type of Medium: Book
    Pages: xvii, 786 Seiten , Illustrationen, Karten
    Edition: Second edition
    ISBN: 9780128191095
    DDC: 551.69989
    RVK:
    Language: English
    Note: Literaturangaben
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  • 6
    ISSN: 1751-8369
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Geosciences
    Notes: The existence of a large subglacial lake beneath the antarctic Ice Sheet at Terre Adélie indicates the presence of basal ice at its pressure-melting temperature. A numerical model of the ice-sheet thermal regime is employed using the balance velocity of the ice sheet as an initial model input in order to calculate ice-sheet basal temperatures. However, the results from this model show the Terre Adélie area to be characterised by basal freezing. Heat in addition to that accounted for in the model is thus required at the ice-sheet base in order for pressure melting temperatures to be attained. The sources for such heat are (1) an enhanced geothermal heat flux and (2) an increase in frictional heating caused by the flow of ice. In this paper the latter possibility is expanded by hypothesising that subglacial topography induces convergent ice flow around Terre Adélie, causing enhanced basal ice velocities. Model experiments indicate that an increase in ice velocity (from 7 to at least 42 m yr−1) is required to raise the temperature of the basal ice to the pressure melting value. Increased ice velocity, and consequent frictional heat production due to convergent ice flow, may therefore be important in explaining the location of the subglacial lake in this region. These results allow the process of convergent ice flow within a contemporary ice sheet to be quantified. A verification (or otherwise) of the model results may be possible if ice surface velocity measurements from modem GPS methods are made.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Earth and Planetary Sciences 33 (2005), S. 215-245 
    ISSN: 0084-6597
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Geosciences , Physics
    Notes: Airborne geophysics has been used to identify more than 100 lakes beneath the ice sheets of Antarctica. The largest, Lake Vostok, is more than 250 km in length and 1 km deep. Subglacial lakes occur because the ice base is kept warm by geothermal heating, and generated meltwater collects in topographic hollows. For lake water to be in equilibrium with the ice sheet, its roof must slope ten times more than the ice sheet surface. This slope causes differential temperatures and melting/freezing rates across the lake ceiling, which excites water circulation. The exploration of subglacial lakes has two goals: to find and understand the life that may inhabit these unique environments and to measure the climate records that occur in sediments on lake floors. The technological developments required for in situ measurements mean, however, that direct studies of subglacial lakes may take several years to happen.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Earth and Planetary Sciences 33 (2005), S. 215-245 
    ISSN: 0084-6597
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Geosciences , Physics
    Notes: Airborne geophysics has been used to identify more than 100 lakes beneath the ice sheets of Antarctica. The largest, Lake Vostok, is more than 250 km in length and 1 km deep. Subglacial lakes occur because the ice base is kept warm by geothermal heating, and generated meltwater collects in topographic hollows. For lake water to be in equilibrium with the ice sheet, its roof must slope ten times more than the ice sheet surface. This slope causes differential temperatures and melting/freezing rates across the lake ceiling, which excites water circulation. The exploration of subglacial lakes has two goals: to find and understand the life that may inhabit these unique environments and to measure the climate records that occur in sediments on lake floors. The technological developments required for in situ measurements mean, however, that direct studies of subglacial lakes may take several years to happen.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 440 (2006), S. 1033-1036 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The existence of many subglacial lakes provides clear evidence for the widespread presence of water beneath the East Antarctic ice sheet, but the hydrology beneath this ice mass is poorly understood. Such knowledge is critical to understanding ice flow, basal water transfer to the ice margin, ...
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Over 70 lakes have now been identified beneath the Antarctic ice sheet. Although water from none of the lakes has been sampled directly, analysis of lake ice frozen (accreted) to the underside of the ice sheet above Lake Vostok, the largest of these lakes, has allowed inferences to be made on lake ...
    Type of Medium: Electronic Resource
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