Search for dissertations about: "northern Fennoscandia"

Showing result 1 - 5 of 32 swedish dissertations containing the words northern Fennoscandia.

  2. 1. Holocene climate and atmospheric circulation changes in northern Fennoscandia : Interpretations from lacustrine oxygen isotope records

    Author : Christina E. Jonsson; Gunhild Rosqvist; Jan Seibert; Philip Barker; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; oxygen isotope; diatom silica; lake sediment; atmospheric circulation; North Atlantic Oscillation; northern Fennoscandia; The Holocene; Little Ice Age; Physical geography; Naturgeografi; Physical Geography; naturgeografi;

    Abstract : This thesis investigates how variations in the oxygen isotopic composition of lake waters in northern Fennoscandia are recorded in lake sediment archives, especially diatoms, and how these variations can be used to infer past changes in climate and atmospheric circulation. Results from analyses of the oxygen isotopic composition of lake water samples (δ18Olakew) collected between 2001 and 2006 show that δ18O of northern Fennoscandian lakes is mainly controlled by the isotopic composition of the precipitation (δ18Op). READ MORE

  4. 2. The Eemian Interglacial at Sokli, northern Finland : A multi-proxy environmental and climatic reconstruction based on a 9 m long lacustrine sediment sequence

    Author : Anna Plikk; Karin F. Helmens; Oliver Heiri; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Last Interglacial MIS5e ; northern Europe; palaeolimnology; palaeoecology; temperature reconstruction; multiple proxies; climate dynamics; climatic events; kvartärgeologi; Quaternary Geology;

    Abstract : Understanding the fundamentals of the Earth’s climate system during the Quaternary Period (the past ca 2.6 million years) is of imminent interest in light of the reported recent climatic changes. READ MORE

  5. 3. Geography and geometry of pre-Caledonian western Baltica: U-Pb geochronology and Palaeomagnetism

    Author : Emma Rehnström; Berggrundsgeologi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physical geography; geomorphology; pedology; cartography; climatology; Fysisk geografi; geomorfologi; marklära; kartografi; klimatologi; Fennoscandia; correlations; Baltica; Early Palaeozoikum; palaeogeography; orthogneisses; nappes; palaeomagnetism; U-Pb geochronology; Caledonian orogen; Scandinavia;

    Abstract : In an attempt to reconstruct the pre-Caledonian cratonic margin of Fennoscandia, U-Pb geochronological and geochemical investigations have been performed on allochthonous orthogneisses in the northern Swedish Caledonides. The crystalline basement of the nappes have also been examined to further constrain the continuation of various chronologically defined orogenic belts. READ MORE

  6. 4. Tree Rings as Sensitive Proxies of Past Climate Change

    Author : Håkan Grudd; Wibjörn Karlén; Brian Luckman; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Tree ring; width; density; climate; temperature; change; variability; sensitivity; Torneträsk; Tornetrask; Sweden; Fennoscandia; explosive; volcanic; eruption; Santorini; Thera; subfossil; Fitzroya; Chile; Physical geography; Naturgeografi;

    Abstract : In the boreal forests of the Northern Hemisphere, time series of tree-ring width (TRW) and maximum density in the latewood (MXD) are highly correlated to local instrumental summer-temperature data and are thus widely used as proxies in high-resolution climate reconstructions. Hence, much of our present knowledge about climatic variability in the last millennium is based on tree-rings. READ MORE

  7. 5. The rhythm of rock art animals : Picturing reindeer, elk and bear around the seasonal cycle in Stone Age Alta

    Author : Helena Günther; Fredrik Fahlander; Ingrid Fuglestvedt; Kristin Armstrong Oma; Stockholms universitet; []
    Keywords : HUMANIORA; HUMANITIES; Rock art; Stone Age hunters; the Arctic; Alta; Northern Fennoscandia; reindeer; elk; bear; traditional contextualised knowledge; human animal relations; human environmental relations; zoo semiotics; ecological community; ethology and animal imagery; arkeologi med inriktning mot allmän arkeologi; Archaeology with General Specialisation;

    Abstract : The Stone Age rock art of Fennoscandia is dominated by pictures of animals. Yet it is its role in the social and cognitive processes within human society that has been the major focus for research. In the thesis, rock art is explored in the lives of people as being part of a larger ecological community. READ MORE