Search for dissertations about: "Biogeochemistry"

Showing result 1 - 5 of 37 swedish dissertations containing the word Biogeochemistry.

  1. 1. Northern peatland carbon biogeochemistry : the influence of vascular plants and edaphic factors on carbon dioxide and methane exchange

    University dissertation from Linköping : Linköpings Universitet

    Author : Mats Öquist; Linköpings universitet.; Linköpings universitet.; [2001]
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Biogeokemi; Biologi; Autekologi; Klimatologi; INTERDISCIPLINARY RESEARCH AREAS; TVÄRVETENSKAPLIGA FORSKNINGSOMRÅDEN;

    Abstract : The interest in carbon dynamics and the interactions between ecosystems and the atmosphere has increased during the last decade due to the postulated threat of anthropgenically induced global and climate change. Northern peatlands, with their large stores of organic carbon and long-term net accumulation of atmospheric carbon dioxide are key ecosystems in these interactions. READ MORE

  2. 2. The role of sediments in the biogeochemical cycles of nutrients in the Gulf of Riga

    University dissertation from Stockholm : Stockholm University

    Author : Juris Aigars; Stockholms universitet.; [2001]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; biogeokemi; Biogeochemistry;

    Abstract : The sediment biogeochemistry of C, N, P and biologic silica (BSi) plays an important role in cycling of these elements in aquatic ecosystems. In shallow coastal and estuarine systems, water-sediment nutrient dynamics can influence biological processes (e.g., primary production) in overlying waters. READ MORE

  3. 3. Visualization, integration and analysis of multi-element geochemical data

    University dissertation from Stockholm : KTH

    Author : Katrin Grünfeld; KTH.; [2005]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; GIS; interactive visualization; glacial till; biogeochemistry; metals; southeastern Sweden; Geovetenskap; NATURAL SCIENCES Earth sciences; NATURVETENSKAP Geovetenskap;

    Abstract : generated large databases containing information on the concentrations of chemical elements in rocks, surface sediments and biogeochemical materials. Regional geochemical data being imprecise, multivariate, spatially auto-correlated and non-normally distributed pose specific problems to the choice of data analysis methods. READ MORE

  4. 4. Modelling the Dissolved Inorganic Carbon System in the Baltic Sea

    University dissertation from Stockholm : KTH

    Author : Moa Edman; Göteborgs universitet.; Gothenburg University.; [2013]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Baltic Sea; Kattegat; pH; pCO2; total alkalinity; biogeochemistry; dissolved inorganic carbon; eutrophication; acidification; climate change; numerical modelling;

    Abstract : Oceans are capable of storing part of the emitted anthropogenic carbon dioxide (CO2) due to the formation of carbonic acid and subsequent dissociation. CO2 is also assimilated by biota and the inorganic carbon system is thus coupled to biogeochemical processes. READ MORE

  5. 5. Determination of mercury chemical speciation in the presence of low molecular mass thiols and its importance for mercury methylation

    University dissertation from Umeå : Umeå universitet

    Author : Van Liem-Nguyen; Umeå universitet.; [2016]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Mercury; methylmercury; LMM thiol; mass spectrometry; biogeochemistry; soil; sediment; ICP; WinSGW; modeling; S XANES; ligand exchange; stability constant; boreal wetlands; Analytical Chemistry; analytisk kemi; Environmental Science; miljövetenskap;

    Abstract : Methylmercury (MeHg) is a neurotoxic compound that threatens the well-being of humans and wildlife. It is formed through the methylation of inorganic mercury (HgII) under suboxic/anoxic conditions in soils, sediment and waters. READ MORE