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  • 1
    Call number: G 9084 ; AWI G7-91-0409 ; M 91.0560
    In: Physical, chemical, and earth sciences research report
    Type of Medium: Monograph available for loan
    Pages: XI, 400 S. : Ill., graph. Darst.
    ISBN: 0471921858
    Series Statement: Physical, chemical, and earth sciences research report 8
    Language: English
    Note: Table of Contents: The Dahlem Konferenzen / S. Bernhard. - Introduction / H. Oeschger and C. C. Langway, Jr. - Aerosol transport from sources to ice sheets / G. E. Shaw. - Mechanisms of wet and dry deposition of atmospheric contaminants to snow surfaces / C. I. Davidson. - The transformation of snow to ice and the occlusion of gases / J. Schwander. - Environmental records in alpine glaciers / D. Wagenbach. - GROUP REPORT. - How do glaciers record environmental processes and preserve information? / J. W. C. White, P. Brimblecombe, C. Brühl, C. I. Davidson, R. J. Delmas, G. Gravenhorst, K. O. Münnich, S. A. Penkett, U. Schotterer, J. Schwander, G. E. Shaw, D. Wagenbach. - Dating by physical and chemical seasonal variations and reference horizons / C. U. Hammer. - Dating of ice by radioactive isotopes / B. R. Stauffer. - Dating by ice flow modeling: a useful tool or an exercise in applied mathematics? / N. Reeh. - Physical property reference horizons / H. Shoji and C. C. Langway, Jr. - GROUP REPORT. - How can an ice core chronology be established? / W. F. Budd, J. T. Andrews, R. C. Finkel, E. L. Fireman, W. Graf, C. U. Hammer, J. Jouzel, D. P. Raynaud, N. Reeh, H. Shoji, B. R. Stauffer, J. Weertman. - Temporal variations of trace gases in ice cores / M. A. K. Khalil and R. A. Rasmussen. - Trace metals and organic compounds in ice cores / D. A. Peel. - The ionic deposits in polar ice cores / H. B. Clausen and C. C. Langway, Jr. - The impact of observed changes in atmospheric composition on global atmospheric chemistry and climate / P. J. Crutzen and C. Brühl. - GROUP REPORT. - What anthropogenic impacts are recorded in glaciers? / G. I. Pearman, R. J. Charlson, T. Class, H. B. Clausen, P. J. Crutzen, T. Hughes, D. A. Peel, K. A. Rahn, J. Rudolph, U. Siegenthaler, D. S. Zardini. - Past environmental long-term records from the Arctic / W. Dansgaard and H. Oeschger. - Long-term changes in the concentrations of major chemical compounds (soluble and insoluble) along deep ice cores / R. J. Delmas and M. Legrand. - Long-term environmental records from Antarctic ice cores / C. Lorius, G. Raisbeck, J. Jouzel, and D. Raynoud. - Studies of polar ice: insights for atmospheric chemistry / M. B. McElroy. - GROUP REPORT. - Long-term ice core records and global environmental changes / A. D. Hecht, W. Dansgaard, J. A. Eddy, S. J. Johnsen, M. A. Lange, C. C. Langway, Jr., C. Lorius, M. B. McElroy, H. Oeschger, G. Raisbeck, P. Schlosser. - List of participants with fields of research. - Subject index. - Author index.
    Location: Upper compact magazine
    Location: AWI Reading room
    Branch Library: GFZ Library
    Branch Library: AWI Library
    Branch Library: GFZ Library
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  • 2
    Series available for loan
    Series available for loan
    Melburne
    Associated volumes
    Call number: AWI G7-93-0348
    In: ANARE scientific reports
    Type of Medium: Series available for loan
    Pages: 216 S. : graph. Darst. ; 24 cm
    Series Statement: ANARE scientific reports : Series A (IV), Glaciology 108
    Branch Library: AWI Library
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  • 3
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    Alfred Wegener Institute for Polar and Marine Research & German Society of Polar Research
    In:  EPIC3Polarforschung, Bremerhaven, Alfred Wegener Institute for Polar and Marine Research & German Society of Polar Research, 39(1), pp. 293-306, ISSN: 0032-2490
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: "Polarforschung" , peerRev
    Format: application/pdf
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  • 4
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    Alfred Wegener Institute for Polar and Marine Research & German Society of Polar Research
    In:  EPIC3Polarforschung, Bremerhaven, Alfred Wegener Institute for Polar and Marine Research & German Society of Polar Research, 33(1/2), pp. 187-188, ISSN: 0032-2490
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: "Polarforschung" , peerRev
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  • 5
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    Alfred Wegener Institute for Polar and Marine Research & German Society of Polar Research
    In:  EPIC3Polarforschung, Bremerhaven, Alfred Wegener Institute for Polar and Marine Research & German Society of Polar Research, 56(1/2), pp. 43-63, ISSN: 0032-2490
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: "Polarforschung" , peerRev
    Format: application/pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Landscape and Urban Planning 18 (1989), S. 97-116 
    ISSN: 0169-2046
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Architecture, Civil Engineering, Surveying , Geography , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Landscape and Urban Planning 19 (1990), S. 17-46 
    ISSN: 0169-2046
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Architecture, Civil Engineering, Surveying , Geography , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Climate dynamics 15 (1999), S. 127-143 
    ISSN: 1432-0894
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract  The effect of a snow cover on sea ice accretion and ablation is estimated based on the ‘zero-layer’ version sea ice model of Semtner, and is examined using a coupled atmosphere-sea ice model including feedbacks and ice dynamics effects. When snow is disregarded in the coupled model the averaged Antarctic sea ice becomes thicker. When only half of the snowfall predicted by the atmospheric model is allowed to land on the ice surface sea ice gets thicker in most of the Weddell and Ross Seas but thinner in East Antarctic in winter, with the average slightly thicker. When twice as much snowfall as predicted by the atmospheric model is assumed to land on the ice surface sea ice also gets much thicker due to the large increase of snow-ice formation. These results indicate the importance of the correct simulation of the snow cover over sea ice and snow-ice formation in the Antarctic. Our results also illustrate the complex feedback effects of the snow cover in global climate models. In this study we have also tested the use of a mean value of 0.16 Wm-1 K-1 instead of 0.31 for the thermal conductivity of snow in the coupled model, based on the most recent observations in the eastern Antarctic and Bellingshausen and Amundsen Seas, and have found that the sea ice distribution changes greatly, with the ice becoming much thinner by about 0.2 m in the Antarctic and about 0.4 m in the Arctic on average. This implies that the magnitude of the thermal conductivity of snow is of considerable importance for the simulation of the sea ice distribution. An appropriate value of the thermal conductivity of snow is as crucial as the depth of the snow layer and the snowfall rate in a sea ice model. The coupled climate models require accurate values of the effective thermal conductivity of snow from observations for validating the simulated sea ice distribution under the present climate conditions.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Climatic change 4 (1982), S. 341-351 
    ISSN: 1573-1480
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary and Conclusions The Last Great Ice Sheets provides a valuable compilation for current estimates of the extent and timing of the maximum ice extent of the last ice age period around the globe. The areas of uncertainty are indicated and emphasis is given to points of controversy where further research is needed to resolve the most important problems still remaining. The work thereby presents plausible upper and lower limit estimates for the maximum extent of the ice corresponding to about 18 ka BP. These limits can be used for the boundary conditions required for atmospheric climate modelling studies. For this type of application the differences in the upper and lower limits are not serious and consequently the possible errors in the reconstruction estimates are not so important. The greatest uncertainties in the ice cover reconstructions occur for the northerly limits of the grounded ice which tend to be in off-shore regions where reliable data is sparse. This signals the requirement for a much greater research effort to collect off-shore sediment sequences and other data to help clarify the ice cover fluctuation record. The possibility of an extensive arctic ice shelf system and marine ice sheet cover interconnecting with the various grounded ice sheets is put forward as a working hypothesis along with arguments in favour of the upper limit estimates for the maximum ice extent. The extent of the ice age ice shelves is an important question which should be examined by dynamic ice sheet modelling with explicit ice shelf formulation. The extensive growth of the ice sheets to seaward margins leads naturally to ice shelf formation. The major questions are: how extensive were the ice shelves, and to what extent did coalescence occur? The further hypothesis that the ice shelves may have had a major role in the growth and decay of the ice sheets is more difficult to support since the results of the dynamic modelling indicate that the ice shelves form readily as a result of extensive growth of the ice sheets but it is difficult to start extensive ice growth near sea level. The information presented for the timing of the advance towards the maximum ice cover and the subsequent pattern of retreat provides further valuable material to test the dynamic ice sheet and climate models including the reactions to the Earth's orbital radiation changes. These results for the rates of change of the ice cover taken together with the modelling results of Budd and Smith indicate that neither the ice sheets nor the bedrock depression had time to reach equilibrium states. The non-equilibrium nature of the ice sheets with only short periods between relatively rapid advance and retreat phases is an important factor that needs to be taken into account in assessing the reconstructions of the ice sheets. This emphasises the need for further work with dynamic ice sheet models and coupled global atmosphere ocean models to determine more clearly the sequence of changes during the growth and decay of the large ice sheets. ‘The Last Great Ice Sheets’ provides a timely data base and compilation to support these studies.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Climatic change 18 (1991), S. 271-299 
    ISSN: 1573-1480
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The Antarctic region of the globe is of special importance for a wide range of studies of global change. The IGBP research activities needing special focus for global change should be multidisciplinary, should involve both the geosphere and the biosphere, and should be of global as well as local interest. There are a number of important Antarctic research topics which fit these criteria. A decrease of Antarctic sea ice has a positive feedback on global warming. Reduction in the sea ice also impacts on deep ocean circulation and can give a positive feedback to the increase of atmospheric carbon dioxide by the reduction of a deep ocean sink. Changes in the mass balance of the Antarctic ice sheet impact on global sea level. A unique historic record of past climate and global environmental changes is being obtained from deep core drilling in the Antarctic ice sheet. Decreases of stratospheric ozone are most pronounced over the Antarctic in spring. The impact of increases in ultraviolet radiation on the biosphere can be studied in the Antarctic as a precurser to possible changes developing elsewhere around the globe. Changes in the atmosphere and ocean circulations resulting from the decrease in Antarctic sea ice cover can have important effects on ocean surface temperatures which impact on the climates of the continents. These topics are discussed briefly and a number of Antarctic research areas are highlighted which build on existing or planned international programmes and which can make critical contributions to multidisciplinary studies of global change.
    Type of Medium: Electronic Resource
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