Sökning: "active layer depth"

Visar resultat 21 - 25 av 25 uppsatser innehållade orden active layer depth.

1. 21. Modeling the effect of activelayer deepening on stocks ofsoil organic carbon in thePechora River Basin

   Kandidat-uppsats, Institutionen för naturgeografi och kvartärgeologi (INK)

   Författare :Pia Eriksson; [2012]
   Nyckelord :permafrost; global warming; carbon cycling; GIS;

   Sammanfattning : This study investigates how the estimated thickening of the active layer will affectthe soil organic carbon in permafrost soils. The focus lies on estimating how muchof the upper permafrost soil organic carbon will be affected by the active layerdeepening due to global warming, on what timescale the deepening will take placeand if the estimated changes differ depending on the extent of permafrost in theregion. LÄS MER

3. 22. Grazing in the Arctic : can it mitigate the impacts of climate change? : case study: Zackenberg, northeast Greenland

   Kandidat-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Författare :Caroline Jonsson; [2012]
   Nyckelord :Arctic; climate change; warming; grazing; ecosystem responses; muskox; herbivores; grazing optimization hypothesis; CO₂-fluxes; Greenland; Zackenberg; Earth and Environmental Sciences;

   Sammanfattning : Climate change has affected ecosystem structure and composition in the Arctic during the last few decades. Researchers have observed a greening trend as the active layer depth is increasing due to rising air- and soil temperatures. LÄS MER

4. 23. Subarctic peatlands in a changing climate : greenhouse gas response to experimentally increased snow cover

   Master-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Författare :Herbert Mbufong Njuabe ; [2011]
   Nyckelord :greenhouse gases; subarctic peatlands; geography; physical geography; climate change; Earth and Environmental Sciences;

   Sammanfattning : The rate of change of our climate has been amplified since the industrial revolution and is expected to change even further by the end of this century. Global temperature and precipitation are expected to increase considerably over the next century. These increases are expected to be magnified in the Arctic regions. LÄS MER

5. 24. Degrading palsa mires in northern Europe : changing vegetation in an altering climate and its potential impact on greenhouse gas fluxes

   Master-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Författare :Julia Karlgård; [2008]
   Nyckelord :geography; physical geography; palsa mires; northern Europe; greenhouse gas fluxes; Earth and Environmental Sciences;

   Sammanfattning : The on-going global warming is projected to have large impacts on the arctic and subarctic environment. Especially vulnerable are ecosystems with narrow climatic envelopes and with small possibilities of adaptation. An example of this is the palsa mires, subarctic mire complexes with patches of permafrost. LÄS MER

7. 25. Potentiell fosforfrigörelse från sedimentet i Bornsjön, sydvästra Stockholm : The potential leakage of phosphorus from sediment in Lake Bornsjön, south western Stockholm

   Magister-uppsats, Institutionen för livsvetenskaper

   Författare :Susanne Lindhe; [2007]
   Nyckelord :;

   Sammanfattning : Lake Bornsjön is situated 30 km southwest of Stockholm in a rift valley lake and consist three basins outstretched in northwest-southeast direction. The surface area is 6,7 km2 with a maximum depth of 18,3 meters, a mean depth of 9,8 meters and a retention time of the water of 6,5 years. LÄS MER