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Showing result 1 - 5 of 9 essays matching the above criteria.
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1. Estimating active layer thickness at the high Arctic study site Zackenberg from remotely sensed ground subsidence
University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskapAbstract : The active layer thickness (ALT) is an indicator of permafrost thaw, which potentially leads to the release of large amounts of greenhouse gases under global warming, and thus could further amplify climate change. The thaw depth of the active layer also governs seasonal surface deformation, caused by the volume change between ice to water, which poses risks for slope stability and infrastructure foundations. READ MORE
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2. Hydrologic modelling of the Zackenberg river basin : an applied study using the Soil and Water Assessment Tool
University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskapAbstract : 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. READ MORE
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3. Shifts within the carbon cycle in response to the absence of keystone herbivore Ovibos moschatus in a high arctic mire
University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskapAbstract : Tundra ecosystems are generally recognized as globally important carbon sinks, yet the knowledge on threats to such ecosystems is narrow. Climate change is predicted to reduce the number of muskox (Ovibos moschatus) in the arctic, it is therefore essential to understand the effect herbivores induce on the arctic ecosystem. READ MORE
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4. Analysis of Arctic peak-season carbon flux estimations based on four MODIS vegetation products
University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskapAbstract : Increased temperatures in high latitudes may alter the carbon dynamics throughout the Arctic. Modelled CO2 simulations show that current climate conditions constitute the Arctic a net carbon sink, though the large extent and fine landscape heterogeneity raise an uncertainty about the carbon sink/source status of the region. READ MORE
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5. Higher temperatures increase nutrient availability in the High Arctic, causing elevated competitive pressure and a decline in Papaver radicatum
University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskapAbstract : Linking changes in the vegetation cover with factors that can moderate the effects of climate change is central to our understanding of Arctic ecosystems and their susceptibility to change. The aim of this study has been to investigate the moderating effects of soil conditions. READ MORE
