Sökning: "eddy-covariance method"

Visar resultat 1 - 5 av 12 avhandlingar innehållade orden eddy-covariance method.

  1. 1. Eddy-covariance measurements as a tool for ecological and hydrological studies on the Tibetan Plateau

    Författare :Tobias Biermann; [2014-07-01]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Tibet Plateau; eddy covariance; turbulent energy and matter exchange; Carbon; alpine grassland; land use change;

    Sammanfattning : The environment of the Tibetan Plateau (TP) is regarded as one of the most sensitive ecosystems of the world. However, investigations on effects caused by global climate change or anthropogenic activities are rare due to its quite remote location. LÄS MER

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

    Författare :Brynhildur Bjarnadottir; [2009]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; interannual variability; carbon balance; Larix sibirica; afforestation; stock-change method; carbon sequestration; eddy covariance; biomass functions;

    Sammanfattning : 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. LÄS MER

  3. 3. Air-Sea Fluxes of CO2 Analysis Methods and Impact on Carbon Budget

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Maria Norman; Anna Rutgersson; Erik Sahlée; William Drennan; [2013]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; air-sea exchange; carbon dioxide; Baltic Sea; eddy-covariance method; inertial dissipation method; cospectral-peak method; Baltic Sea measurements; CO2 fluxes; Galathea 3 expedition; Baltic Sea modeling; water-side convection; coastal upwelling; carbon budget; Meteorology; Meteorologi;

    Sammanfattning : Carbon dioxide (CO2) is an important greenhouse gas, and the atmospheric concentration of CO2 has increased by more than 100 ppm since prior to the industrial revolution.  The global oceans are considered an important sink of atmospheric CO2, since approximately one third of the anthropogenic emissions are absorbed by the oceans. LÄS MER

  4. 4. Lake Fluxes of Methane and Carbon Dioxide

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Eva Podgrajsek; Erik Sahlée; Dennis Baldocchi; [2015]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; air-lake gas exchange; carbon dioxide; eddy covariance; floating chambers; methane; waterside convection; Meteorology; Meteorologi;

    Sammanfattning : Methane (CH4) and carbon dioxide (CO2) are two important greenhouse gases. Recent studies have shown that lakes, although they cover a small area of the globe, can be very important natural sources of atmospheric CH4 and CO2. LÄS MER

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

    Detta är en avhandling från GeoBiosphere Science Centre, Department of Physical Geography and Ecosystems Analysis, Lund University, Sölvegatan 12, 223 62, Lund, Sweden

    Författare :Marcin Jackowicz-Korczynski; [2009]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; eddy covariance; chamber; methnaol; isoprene; nonmethane hydrocarbons; methane; carbon dioxide; carbon; mire; permafrost; subarctic; palsa; greenhouse gas;

    Sammanfattning : 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. LÄS MER