Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 25 for “"Umhverfisbreytingar á norðurslóðum"”.
-
Nitrification inhibitors have minimal impact on microbial and Collembola communities in Danish arable soil
This study aimed to investigate the targeted and non-target impacts of nitrification inhibitors (NIs) on the soil microbial and collembola communities in arable soils under a spring barley cultivation system. By assessing soils where inhibitors were repeatedly applied alongside fertilizers, we …
-
Soil-atmosphere fluxes of CO2 and CH4 in annual and perennial cropping systems in southern Sweden
Annual cropping systems dominate agricultural grain production, but have been linked to several key environmental issues, such as loss of biodiversity and pollution of groundwater. Newly developed perennial grains may offer solutions to some of those problems. Their longer roots and growing seasons …
-
Effects of soil temperature on Sphagnum moss litter quality and decomposition in a subarctic environment
High latitude peatlands play a significant role in global soil carbon budgets, attributed to the slow decomposition rate of Sphagnum mosses that facilitates carbon sequestration through the build-up of peat. As climate change is predicted to increase soil temperatures and decomposition rates of …
-
The future of Narsap Sermia: Documenting the retreat of a tidewater glacier in Southwest Greenland
The behaviour of Greenland’s tidewater glaciers is crucial for the understanding of the Greenland Ice Sheet. The retreat of those marine-terminating glaciers has far-reaching implications, impacting not only the regional hydrography but also the diverse fjord ecosystems. Here, this study …
-
Underlining the potential drivers of carbon allocation in Kernza® crops
The present study investigates the primary factors influencing carbon allocation in Thinopyrum intermedium (Kernza) during its first growth year at the PERENNIAL experimental site in Alnarp, Sweden. Focusing on the distribution of aboveground and belowground biomass and the role of soil properties, …
-
Observing Seasonal Cycles in Greenhouse Gas Fluxes with Automatic Flushing Chambers in a Low-Arctic Lake
The Arctic is warming nearly four times faster than the global average. Greenhouse gases (GHG) are causing a changing climate which is affecting permafrost thaw, sea ice melt, and changing hydrological dynamics. Lakes in the Arctic and sub-Arctic regions are increasingly recognised as important …
-
Married to the Lab. Tying the Knot of Art and Science
The aim of this thesis is to tie the knot of art and science, searching for ways to explain and explore complex atmospheric phenomena through art. Primary methods of research are poetry, video and performance art practice. The results of this thesis are five video performance art works as well as …
-
“Influence of climate change on behavioural traits of Palaemon elegans, an invasive species in the Baltic Sea
The Baltic Sea is undergoing changes due to climate change, including an increase in its temperature. This may in turn lead to changes in the traits of the species that inhabit it, including non-endemic, invasive species. Palaemon elegans is a species native to the Atlantic Ocean that has been …
-
Modeling the effect of the energy crisis on air quality in the Po Valley, Italy.
This thesis investigates the impact of the energy crisis on air quality in the Po Valley, Italy, with a focus on the effect of changes in methane consumption over the potential changes in wood burn ing consumption. The study employs the WRF-CHIMERE model to simulate the consequences of varying wood …
-
Evaluating dNBR and CBI for Fire Severity Estimation in Fennoscandian Boreal Surface Fires
Fire severity—the magnitude of ecological change induced by fire—plays a critical role in shaping post-fire recovery dynamics, carbon cycling, and forest management decisions. In Fennoscandian boreal forests, however, accurate severity estimation using remote sensing remains challenging due to …
-
SVALPEN Svalbard Radar Snow Penetration Experiment
Studying the extent and thickness of sea and glacial ice in a warming climate is important since they have both local and global significance in the form of feedback loops, climate effects, and ship transport, among others. While the extent of ice is well studied using satellite-based radar remote …
-
Environmental Changes in Eastern Lapland during the last 50 years
The study is sought to study how and if the environment has changed in eastern Finnish Lapland in a long-term perspective. Variables related to the current state of the environment, are atmospheric composition and aerosols, meteorology, and biology. The study is based on measurements from Värriö …
-
Phenology Effects on Carbon and Water Dynamics in a Pristine Boreal Fen A multi-decadal analysis from 2005-2007 & 2014-2022
Boreal peatlands are major constituents of the global carbon (C) and water cycles and therefore important climate regulators. These cycle dynamics are strongly determined by plant phenology (e.g.,vascular plant photosynthesis and seasonality) and evapotranspiration (ET), next to other abiotic …
-
Non-growing season CO2 fluxes of a boreal fen – key drivers and responses to anomalous winter conditions
Non-growing season carbon fluxes can contribute to a significant amount of the full-year ecosystem carbon balance. Year-round net ecosystem exchange (NEE) data from 17 years was used to analyse the non-growing season carbon dioxide (CO2) fluxes together with environmental and meteorological …
-
Evaluating impacts of hydroclimatic extremes on water use efficiency and carbon use efficiency of northern ecosystems
Climate change intensifies extreme weather events, especially droughts, with severe consequences to the functional integrity of terrestrial high-latitude ecosystems. As essential global water and carbon balance regulators, these sensitive ecosystems respond to increased warming and altered …
-
Fermentation of organic waste for bioplastic production. A potential sustainable alternative to fossil-fuel plastic
The plastic pollution has become a massive problem in the Arctic, affecting aquatic, and terrestrial ecosystems, the cryosphere, and the atmosphere. One of the solutions proposed by the Arctic Council is to improve waste management by using renewable and sustainable materials. This is where …
-
Population of Gladioulus imbricatus under diverse management regimes in SW Estonia
The sword lily Gladiolus imbricatus is an endangered species within plant communities of semi-natural grasslands. Coastal meadows, extensively managed as pastures or meadows, are amongst its favored habitats and thrive with biodiversity in fauna and flora. However, following major land-use changes …
-
Meteorological and geomorphological influence on harbor seal haul-out distribution behavior using drone imagery
Harbor seals in Kosterhavet National Park face critical challenges during summer months, as two sensitive life stages (pupping and molting) which are vital for the population’s success coincide in time with the increase in tourist activity. This study assessed how topography and meteorological …
-
Nitrogen uptake patterns by snow addition in a sub-Arctic dry heath tundra ecosystem
The Arctic heath tundra ecosystem is undergoing rapid transformations driven by climate change,which particularly affectssnow accumulation and the length of the growing season. In this study, I examined the influence of snow depth on parameters such as water content, soil temperature, microbial …
-
Influence of muskox carcasses on soil nutrients and vegetation in a High Arctic ecosystem in northeast Greenland
… jarðvegs og samsetningu gróðurs á norðurslóðum og eykur á þann hátt á breytileika á landslagsvísu á næringarsnauðum svæðum.
Page 1 of 2