Search for dissertations about: "naturgeografi"

Showing result 1 - 5 of 273 swedish dissertations containing the word naturgeografi.

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

    Author : Grete Algesten; Mats Jansson; Pirkko Kortelainen; Umeå universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; 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;

    Abstract : 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. READ MORE

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

    Author : Christian Bigler; Ingemar Renberg; Roland Hall; N. John Anderson; Umeå universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; 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;

    Abstract : 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. READ MORE

  3. 3. Response of glaciers to climate change : Mass balance sensitivity, sea level rise and runoff

    Author : Mattias de Woul; Regine Hock; Peter Jansson; Margareta Hansson; Roger J. Braithwaite; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; glacier; mass balance modelling; mass balance sensitivity; sea level rise; glacial runoff; Hofsjökull; Storglaciären; Physical geography; Naturgeografi; Physical Geography; naturgeografi;

    Abstract : The purpose of this study is to enhance our understanding of the response of glaciers to climate change. Global sea level is affected by changes in glacier ice volume, and melt-water from glaciers is a principal water source in many regions. READ MORE

  4. 4. Making water information relevant on local to global scale – the role of Information Systems for Integrated Water Management

    Author : Fredrik Hannerz; Georgia Destouni; Dennis Lettenmaier; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Integrated water management; hydrology; environmental information systems; environmental monitoring; land cover; GIS; Sweden; Baltic Sea; European Union; global water; global change; Water Framework Directive; Physical geography; Naturgeografi; Physical Geography; naturgeografi;

    Abstract : Relevant information is essential for finding solutions in Integrated Water Management (IWM). Complex water systems and a need for increasing integration of sectors, actors and scales in IWM require new methods for developing and managing such information. READ MORE

  5. 5. Glacial geology of Bayan Har Shan, northeastern Tibetan Plateau

    Author : Jakob Heyman; Arjen P Stroeven; Clas Hättestrand; Helena Alexanderson; Mark D Johnson; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Physical geography; Naturgeografi; Physical Geography; naturgeografi;

    Abstract : The paleoglaciology of the Tibetan Plateau is still largely unexplored, despite its importance for regional and global climate reconstructions. In this thesis a comprehensive glacial geological record is presented from an extensive part of the northeastern Tibetan Plateau centred on the Bayan Har Shan. READ MORE