Sökning: "CH₄ flux"
Visar resultat 6 - 10 av 28 uppsatser innehållade orden CH₄ flux.
6. Greenhouse gas emissions from three large lakes during the autumn 2020
Kandidat-uppsats, Linköpings universitet/Institutionen för temaSammanfattning : Methane (CH4) and carbon dioxide (CO2) are two greenhouse gases and main drivers of global climate change. Lakes are known to be a source of CH4 and CO2 to the atmosphere. While the importance of these emissions is clear, their magnitudes and regulation are still uncertain due to the scarcity of flux measurement data from lakes. LÄS MER
7. Influence of permafrost disintegration on wetland carbon fluxes in Abisko, Sweden
Master-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskapSammanfattning : The northern permafrost regions are experiencing a rapid warming as surface temperatures are rising, causing a disintegration of permafrost and a deepening of the active layer (AL). This releases previously frozen carbon, making it available for decomposition by microbes. LÄS MER
8. Assessment of how environmental variables and vegetation structure influence peatland carbon fluxes
Master-uppsats, Uppsala universitet/Växtekologi och evolution; Uppsala universitet/Institutionen för biologisk grundutbildningSammanfattning : Boreal peatlands are important ecosystems from a carbon balance perspective because they are natural carbon sinks as a result of millennia of peat formation. However, due to climate change, these ecosystems are susceptible to changes in hydrology and temperature. LÄS MER
9. Greenhoue gas flux over a 50-year post permafrost thaw gradient. Decomposition of soil organic carbon from the Swedish tussock tundra.
Master-uppsats, Göteborgs universitet/Institutionen för geovetenskaperSammanfattning : As the globe is warming the extent of permafrost drastically decreases in the high latitudes. Upon thaw the stored soil organic carbon (SOC) undergoes rapid decomposition and is partly released as trace gases to the atmosphere. LÄS MER
10. Variability of summer CH4 and CO2 flux rates in and between three large Swedish lakes : A spatio-temporal field study
Kandidat-uppsats, Linköpings universitet/Tema MiljöförändringSammanfattning : Understanding of natural greenhouse gas (GHG) cycles is crucial for making GHG budgets, which work as basis in climate change and global warming policy programs. Lakes as a source for GHG activity have only recently been included in global GHG budgets, and most studies of lake GHG flux rates are conducted on lakes <10 km2, which only comprise roughly half of the global lake area—making data of large lake flux rates scarce. LÄS MER