Sökning: "NATURAL SCIENCES Earth sciences Exogenous earth sciences Quaternary geology"

Visar resultat 1 - 5 av 32 avhandlingar innehållade orden NATURAL SCIENCES Earth sciences Exogenous earth sciences Quaternary geology.

  1. 1. Quaternary paleoceanography of the Arctic Ocean A study of sediment stratigraphy and physical properties

    Detta är en avhandling från Stockholm : Department of Geology and Geochemistry, Stockholm University

    Författare :Emma Sellén; Stockholms universitet.; [2009]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Arctic Ocean; sedimentology; Quaternary; stratigraphy; physical properties; NATURAL SCIENCES Earth sciences; NATURVETENSKAP Geovetenskap; NATURAL SCIENCES Earth sciences Exogenous earth sciences Quaternary geology; NATURVETENSKAP Geovetenskap Exogen geovetenskap Kvartärgeologi; NATURAL SCIENCES Earth sciences Exogenous earth sciences Sedimentology; NATURVETENSKAP Geovetenskap Exogen geovetenskap Sedimentologi; Marine Geoscience; marin geovetenskap;

    Sammanfattning : A Quaternary perspective on the paleoceanographic evolution of the central Arctic Ocean has been obtained in this PhD thesis by studying sediment cores from all of the Arctic’s major submarine ridges and plateaus. The included cores were mainly recovered during the Healy-Oden Trans-Arctic expedition in 2005 and the Lomonosov Ridge off Greenland expedition in 2007. LÄS MER

  2. 2. Palaeoglaciology of the northeastern Tibetan Plateau

    Detta är en avhandling från Stockholm : Department of Physical Geography and Quaternary Geology, Stockholm University

    Författare :Jakob Heyman; Stockholms universitet.; [2010]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Tibetan Plateau; palaeoglaciology; NATURAL SCIENCES Earth sciences Exogenous earth sciences Physical geography; NATURVETENSKAP Geovetenskap Exogen geovetenskap Naturgeografi; NATURAL SCIENCES Earth sciences Exogenous earth sciences Quaternary geology; NATURVETENSKAP Geovetenskap Exogen geovetenskap Kvartärgeologi; Physical Geography; naturgeografi;

    Sammanfattning : This study concerns the palaeoglaciation of the northeastern Tibetan Plateau, with emphasis on the Bayan Har Shan (Shan = Mountain) in the headwaters of Huang He (Yellow River). To reconstruct past glacier development multiple techniques, including remote sensing, field investigations, cosmogenic exposure dating, and numerical modelling have been employed. LÄS MER

  3. 3. Late Quaternary ice sheet history and dynamics in central and southern Scandinavia

    Detta är en avhandling från Stockholm : Department of Physical Geography and Quaternary Geology, Stockholm University

    Författare :Timothy Johnsen; Stockholms universitet.; [2010]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Scandinavian ice sheet; ice sheet dynamics; luminescence dating; cosmogenic exposure dating; geochronology; moraine; interstadial; deglaciation; nunatak; NATURAL SCIENCES Earth sciences Exogenous earth sciences Quaternary geology; NATURVETENSKAP Geovetenskap Exogen geovetenskap Kvartärgeologi; Quarternary Geology; kvartärgeologi;

    Sammanfattning : Recent work suggests an emerging new paradigm for the Scandinavian ice sheet (SIS); one of a dynamically fluctuating ice sheet. This doctoral research project explicitly examines the history and dynamics of the SIS at four sites within Sweden and Norway, and provides results covering different time periods of glacial history. LÄS MER

  4. 4. Present and Past Coastal Dune Environments of South Buenos Aires Province, Argentina

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Sonia L. Fontana; Uppsala universitet.; [2004]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Quaternary geology; pollen; ostracods; dune vegetation; Holocene; Buenos Aires Province; Argentina; Kvartärgeologi; NATURAL SCIENCES Earth sciences Exogenous earth sciences Quaternary geology; NATURVETENSKAP Geovetenskap Exogen geovetenskap Kvartärgeologi;

    Sammanfattning : The aim of this thesis is to describe present and past coastal dune environments in southern Buenos Aires Province, Argentina. The present vegetation of a dune system and its zonation are described on the basis of air photographs, physiognomy of the dune system and floristic composition. LÄS MER

  5. 5. The Holocene Spread of Spruce in Scandinavia

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Thomas Giesecke; Uppsala universitet.; [2004]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Quaternary geology; Picea abies; pollen analyses; tree migration; population dynamics; Kvartärgeologi; NATURAL SCIENCES Earth sciences Exogenous earth sciences Quaternary geology; NATURVETENSKAP Geovetenskap Exogen geovetenskap Kvartärgeologi;

    Sammanfattning : The Holocene spread of Picea abies in Scandinavia provides an excellent opportunity for detailed study of the dynamics of tree spread and population expansion. Early- and mid-Holocene macrofossil evidence for the presence of Picea abies in Scandinavia has questioned traditional interpretations of the timing and direction of its spread. LÄS MER