Sökning: "active layer depth"
Visar resultat 6 - 10 av 25 uppsatser innehållade orden active layer depth.
6. Reconstructing Weathering and Climate Trends on Loess Deposits in NW France Using XRF Analysis
Kandidat-uppsats, Uppsala universitet/Institutionen för geovetenskaperSammanfattning : Analyzing climate changes by loess sediment deposits formed after the last glacial maximum gives us information about how the environment was dynamically before humans physically could record climate changes. Sampling and analyzing loess from different places in the world give us a more reliable view of when events and changes in climate took place. LÄS MER
7. Ash distribution and cavities in Icelandic glaciers, a marker for snow accumulation and radar signal velocity change
Master-uppsats, Göteborgs universitet/Institutionen för geovetenskaperSammanfattning : Glaciers in the geologically active Iceland has a high scientific as well as touristic value. In this thesis, the two largest glaciers on Iceland have been studied with GPR to find if the method is suitable to use in future glaciolocial studies where accumulation patterns and similar attributes are in focus in a world of deglaciation. LÄS MER
8. Snow insulation effects across the Arctic : evaluating a revised snow module in LPJ-GUESS
Master-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskapSammanfattning : The effect of future changes in temperature and precipitation patterns on arctic ecosystem functioning is often assessed using state-of-the-art ecosystem models. Many models however lack detailed representation of wintertime processes, as pointed out by recent studies (Wang et al. 2016, Slater and Lawrence 2013). LÄS MER
9. Hydrologic modelling of the Zackenberg river basin : an applied study using the Soil and Water Assessment Tool
Kandidat-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskapSammanfattning : Since the 1980s, the Arctic has experienced an amplified warming of more than twice the rate of the global-mean, leading to large-scale changes in the Arctic hydrologic system, ultimately having cascading feedbacks on the global climate. However, few of today’s distributed models manage to capture the complex processes in Arctic hydrology, and therefore, the aim of this thesis was to evaluate the usage of the distributed Soil and Water Assessment Tool (SWAT) model, to see whether it could capture the different surface water paths and processes characterizing the Arctic water cycle. LÄS MER
10. Soil organic carbon storage, distribution and characteristics in two contrasting permafrostaffected environments : Evaluating the role of alpine and lowland tundra areas in the permafrost carbon feedback
Magister-uppsats, Stockholms universitet/Institutionen för naturgeografiSammanfattning : An important portion of the large northern permafrost soil organic carbon (SOC) pool might be released into the atmosphere as greenhouse gases following permafrost thawing and subsequent SOC decomposition under future warming conditions, resulting in a warming amplification known as the permafrost carbon feedback. Improved knowledge about the amount, composition and distribution of the permafrost SOC pool is essential when assessing the potential magnitude and timing of the permafrost carbon feedback. LÄS MER
