Sökning: "permafrost degradation"
Visar resultat 1 - 5 av 13 uppsatser innehållade orden permafrost degradation.
1. Minskning av palsmyrar som resultat av klimatförändringar i norra Sverige mellan 1960–2020
Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskapSammanfattning : The climate is changing at a rapid rate. This causes both an increase in temperature and precipitation in the northern high latitudes. Subarctic peatlands contain 30% of the carbon storage in the northern permafrost zone. LÄS MER
2. 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
3. Traits of peat- and upland-derived stream dissolved organic carbon in the permafrost region around Abisko, northern Sweden
Master-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskapSammanfattning : Climate change-induced thawing of permafrost mobilizes previously frozen carbon of high potential reactivity, thereby, fuelling microbiological production of greenhouse gases. For this work, an analysis of the quantity, quality, and bioreactivity of DOC in streams from the Stordalen discontinuous permafrost catchment was carried out with stream water samples during the relatively warm summer of 2018. LÄS MER
4. Feedback effects in the Arctic region and how they affect the global climate
Master-uppsats, Lunds universitet/Miljövetenskaplig utbildningSammanfattning : The Arctic is warming at a rate two to three times that of the global average. Although only covering a small area of the globe, it is a vital component of the climate system. Through climatic feedback effects the warming is enhanced, and risks leading to further climate change. LÄS MER
5. Effects of Wildfire Burn on Permafrost Landcover and Catchment Hydrology in Manitoba, Canada
Kandidat-uppsats, Uppsala universitet/Institutionen för geovetenskaperSammanfattning : Permafrost is a strongly controlling factor on Arctic hydrology due to its effect on ground permeability, and thus surface and ground water flow paths. As wildfires are increasing in occurrence and magnitude in permafrost regions, they may alter the hydrological regime via permafrost thaw and degradation that increases ground permeability. LÄS MER
