Search for dissertations about: "Carbon balance"

Showing result 1 - 5 of 166 swedish dissertations containing the words Carbon balance.

  1. 1. Water and Carbon Balance Modeling: Methods of Uncertainty Analysis

    Author : John Juston; Per-Erik Jansson; Georg Lindgren; KTH; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Modeling; uncertainty analysis; water balance; carbon balance; GLUE; Environmental engineering; Miljöteknik;

    Abstract : How do additional data of the same and/or different type contribute to reducing model parameter and predictive uncertainties? This was the question addressed with two models – the HBV hydrological water balance model and the ICBM soil carbon balance model – that were used to investigate the usefulness of the Generalized Likelihood Uncertainty Estimation (GLUE) method for calibrations and uncertainty analyses.  The GLUE method is based on threshold screening of Monte Carlo simulations using so-called informal likelihood measures and subjective acceptance criterion. READ MORE

  2. 2. Remote Sensing of Carbon Balance across Scandinavian Forests

    Author : Pontus Olofsson; Institutionen för naturgeografi och ekosystemvetenskap; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Forests; Natural science; Naturvetenskap; Carbon balance; Remote sensing;

    Abstract : A methodology for estimating the carbon balance across Scandinavian forests using remote sensing is presented. By estimating the gross primary production (GPP) and the ecosystem respiration (ER), and thereby, the net ecosystem exchange (NEE), using parameters that are routinely retrieved from satellite, it is possible to implement an operational model for obtaining large scale NEE. READ MORE

  3. 3. Carbon gas biogeochemistry of a northern peatland - in a dynamic permafrost landscape

    Author : Kristina Bäckstrand; Patrick M. Crill; Torben R. Christensen; David Bastviken; Kimberly P. Wickland; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; Carbon balance; Carbon exchange; Peatland; Subarctic; Climate change; Earth sciences; Geovetenskap; geokemi; Geochemistry;

    Abstract : This thesis is about biogeochemical processes of a northern peatland and their importance as a link between the climate and the terrestrial system. Increased temperatures on a global level, and particularly in the Arctic, have led to melting permafrost and changes in hydrology. READ MORE

  4. 4. Carbon stocks and fluxes in a young Siberian larch (Larix sibirica) plantation in Iceland

    Author : Brynhildur Bjarnadottir; Institutionen för naturgeografi och ekosystemvetenskap; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; interannual variability; carbon balance; Larix sibirica; afforestation; stock-change method; carbon sequestration; eddy covariance; biomass functions;

    Abstract : The understanding of how forests function with respect to carbon (C) balance and its interaction with the climate system is a fundamental question in climate change research. Another important question is how large the sink for CO2 is in northern forests and how it varies with forest type, management, stand age and with external factors, such as climate variability. READ MORE

  5. 5. Carbon Balance Implications of Forest Biomass Production Potential

    Author : Bishnu Chandra Poudel; Johan Bergh; Inga Carlman; Roger Sathre; Thomas Lundmark; Mittuniversitetet; []
    Keywords : AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; forest management; silviculture; clear-cut forestry; continuous-cover forestry; substitution; total carbon; climate benefit; climate change; Forestry and Wood Technology; Skog och träteknik;

    Abstract : Forests in boreal and temperate forest-ecosystems have importance for carbonbalance since they sequester large amount of atmospheric carbon by uptake ofcarbon-dioxide during photosynthesis, and transfer and store carbon in the forestecosystem. Forest material can be used for bio-fuel purposes and substitute fossilfuels, and supply wood products, which can replace carbon-and-energy-intensivematerials. READ MORE