Sökning: "umeå universitet geography"

Visar resultat 16 - 20 av 108 avhandlingar innehållade orden umeå universitet geography.

  1. 16. Regulation of carbon dioxide emission from Swedish boreal lakes and the Gulf of Bothnia

    Författare :Grete Algesten; Mats Jansson; Pirkko Kortelainen; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physical geography and sedimentology; lakes; boreal; Gulf of bothnia; CO2; NEE; DOC; mineralization; sediment; catchment; net heterotrophy; Naturgeografi och sedimentologi; Physical geography; Naturgeografi; naturgeografi; Physical Geography;

    Sammanfattning : The global carbon cycle is subject to intense research, where sources and sinks for greenhouse gases, carbon dioxide in particular, are estimated for various systems and biomes. Lakes have previously been neglected in carbon balance estimations, but have recently been recognized to be significant net sources of CO2. LÄS MER

  3. 17. Diatoms as indicators of Holocene climate and environmental change in northern Sweden

    Författare :Christian Bigler; Ingemar Renberg; Roland Hall; N. John Anderson; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physical geography and sedimentology; diatoms; Holocene; paleolimnology; climate change; lake sediments; transfer functions; quantitative environmental reconstructions; northern Sweden; Abisko; Naturgeografi och sedimentologi; Physical geography; Naturgeografi; naturgeografi; Physical Geography;

    Sammanfattning : The objective of the thesis was to explore the potential of diatoms (Bacillariophyceae) as indicators of Holocene climate and environmental change in northern Sweden (Abisko region, 68°21'N, 18°49'E). A modern surface-sediment calibration set including 100 lakes was developed and lake-water pH, sedimentary organic content (assessed by loss-on-ignition) and temperature were identified as most powerful environmental variables explaining the variance within the diatom assemblages. LÄS MER

  4. 18. Jordskatt och kameral organisation i Norrland under äldre tid

    Författare :Ingvar Jonsson; Umeå universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Skatter; Jordägande -- historia -- Sverige -- Norrland -- Före 1500 -- 1500-talet -- 1600-talet; Jordägande -- historia -- Sverige -- Ångermanland -- Före 1500 -- 1500-talet -- 1600-talet; Jordägande-- historia -- Sverige -- Medelpad -- Före 1500 -- 1500-talet -- 1600-talet; Jordägande-- historia -- Sverige -- Hälsingland -- Före 1500 -- 1500-talet -- 1600-talet; Jordägande -- historia -- Sverige -- Västerbotten;

    Sammanfattning : .... LÄS MER

  5. 19. Botniabanan - förväntningar i tid och rum på regional utveckling och resande

    Författare :Backa Fredrik Brandt; Kerstin Westin; Ulf Wiberg; Urban Lindgren; Bruno Jansson; Stig Svallhammar; Umeå universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Railway; Regional development; Stated preference; Property prices; Propensity to travel; Human geography; Kulturgeografi;

    Sammanfattning : The aim of the thesis is twofold: to analyze the effects of the expectations on the Bothnia Line on the housing market and expectations on railway use. To fulfill these aims, three questions are considered:1. To what extent is property prices influenced by the expected effects of the Bothnia Line?2. LÄS MER

  7. 20. New motives for migration? : On interregional mobility in the nordic context

    Författare :Emma Lundholm; Gunnar Malmberg; Kerstin Westin; Allan Findley; Umeå universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; interregional migration; migration motives; migration outcomes; commuting; Human geography; Kulturgeografi;

    Sammanfattning : The subject of this thesis is migrants’ motives and the outcomes of interregional migration, as well as how the propensity for interregional migration has changed for different groups over the past three decades. The background consists of a discussion on the role of the labour market in long-distance migration decisions and a discussion on how social and economic change affect the context in which migration decisions are made. LÄS MER