Search for dissertations about: "biogenic carbon"

Showing result 1 - 5 of 23 swedish dissertations containing the words biogenic carbon.

  1. 1. Land-atmosphere interaction of a subarctic palsa mire

    University dissertation from GeoBiosphere Science Centre, Department of Physical Geography and Ecosystems Analysis, Lund University, Sölvegatan 12, 223 62, Lund, Sweden

    Author : Marcin Jackowicz-Korczynski; Lunds universitet.; Lund University.; [2009]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; eddy covariance; chamber; methnaol; isoprene; nonmethane hydrocarbons; methane; carbon dioxide; carbon; mire; permafrost; subarctic; palsa; greenhouse gas;

    Abstract : The main objective of this thesis was to quantitatively estimate the gaseous exchange of carbon dioxide (CO2) and methane (CH4) between a subarctic wetland ecosystem and the atmosphere. Additionally some initial estimates of the carbon input to the atmosphere of nonmethane hydrocarbons (NMHCs) were also obtained by combining different techniques in a joint setting. READ MORE

  2. 2. Carbon in Boreal Streams Isotopic Tracing of Terrestrial Sources

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Audrey Campeau; Uppsala universitet.; [2019]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : The boreal biome comprises vast areas of coniferous forests, dotted with millions of peatlands. Plants harbouring these ecosystems fix CO2 from the atmosphere, which is later incorporated into the vegetation biomass and subsequently buried in soils. READ MORE

  3. 3. Exploring climate impacts of timber buildings The effects from including non-traditional aspects in life cycle impact assessment

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Diego Peñaloza; KTH.; [2015]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; life cycle assessment LCA ; timber buildings; biobased building materials; low-energy buildings; forest products; climate impact assessment; biogenic emissions; carbon storage; timing of emissions; Industriell ekologi; Industrial Ecology; Civil and Architectural Engineering; Byggvetenskap;

    Abstract : There is an urgency within the building sector to reduce its greenhouse gas emissions and mitigate climate change. An increased proportion of biobased building materials in construction is a potential measure to reduce these emissions. READ MORE

  4. 4. The role of biobased building materials in the climate impacts of construction Effects of increased use of biobased materials in the Swedish building sector

    University dissertation from Stockholm, Sweden : KTH Royal Institute of Technology

    Author : Diego Peñaloza; KTH.; [2017]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; LCA; timber buildings; timber bridges; biobased building materials; dynamic LCA; climate change mitigation; building stock; scenario analysis; biogenic carbon; Civil and Architectural Engineering; Byggvetenskap;

    Abstract : A significant share of the global climate change impacts can be attributed to the construction sector. One mitigation strategy is increasing the use of biobased materials. Life cycle assessment (LCA) has been used to demonstrate the benefits of this, but forest complexities create uncertainty due to omission of key aspects. READ MORE

  5. 5. Infrared spectroscopy as a tool to reconstruct past lake-ecosystem changes Method development and application in lake-sediment studies

    University dissertation from Umeå : Umeå University

    Author : Carsten Meyer-Jacob; Umeå universitet.; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Fourier transform infrared spectroscopy; visible-near infrared spectroscopy; PLS regression; biogenic silica; climate change; carbon cycling; lake-water quality; geochemistry; paleolimnology; Holocene; Lake El’gygytgyn; Torneträsk;

    Abstract : Natural archives such as lake sediments allow us to assess contemporary ecosystem responses to climate and environmental changes in a long-term context beyond the few decades to at most few centuries covered by monitoring or historical data. To achieve a comprehensive view of the changes preserved in sediment records, multi-proxy studies – ideally in high resolution – are necessary. READ MORE