Blar i Faculty of Mathematics and Natural Sciences på emneord "Svalbard"
Viser treff 1-20 av 35
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Asynchronous Accumulation of Organic Carbon and Nitrogen in the Atlantic Gateway to the Arctic Ocean
(Peer reviewed; Journal article, 2018-11-15)Nitrogen (N) is the main limiting nutrient for biological production in the Arctic Ocean. While dissolved inorganic N (DIN) is well studied, the substantial pool of N bound in organic matter (OM) and its bioavailability ... -
Benthic algal vegetation in Isfjorden, Svalbard
(Peer reviewed; Journal article, 2015-08-11)Benthic algal vegetation was investigated at 10 sites in Isfjorden, Svalbard. Five sites were visited during summer 2010 and five during summer 2012. Both the littoral and sublittoral vegetation were sampled, the littoral ... -
Bottom melting of Arctic Sea Ice in the Nansen Basin due to Atlantic Water influence
(Master thesis, 2016-05-24)The hydrographic situation for a region north of Svalbard is investigated using observations from the Norwegian Young Sea Ice Cruise (N-ICE2015). Observations from January to June 2015 are compared to historical observations ... -
Crevasses on Svalbard Glaciers: Distribution and Dynamic Controls
(Master thesis, 2015-05-31)Crevasses play a key role in understanding a wide range of glaciological processes, but the current understanding is mainly based on a few key studies. Recent years, studies on crevasse formation have been motivated by the ... -
Crustal structure and evolution of the Arctic Caledonides: Results fromcontrolled-source seismology
(Peer reviewed; Journal article, 2017-10)The continuation of the Caledonides into the Barents Sea has long been a subject of discussion, and two major orientations of the Caledonian deformation fronts have been suggested: NNW-SSE striking and NE-SW striking. A ... -
The deglaciation of Kongsfjorden, Svalbard —based on surface exposure dating of glacial erratics and Quaternary geological mapping of Blomstrandhalvøya
(Master thesis, 2016-05-27)Surface exposure dating via 10Be cosmogenic nuclide dating is used, alongside Quaternary geological mapping of landforms and sediments, to reconstruct the course of deglaciation following the Late Weichselian Glacial Maximum ... -
Distribution and autecology of chrysophyte cysts from high Arctic Svalbard lakes: preliminary evidence of recent environmental change
(Peer reviewed; Journal article, 2004)Chrysophycean stomatocyst assemblages were analysed from the sediments of 17 lakes and ponds from Svalbard as one component of a multi-proxy investigation of recent environmental change in the high Arctic. Sediment cores ... -
The dynamics of Chironomidae (Insecta: Diptera) assemblages in response to environmental change during the past 700 years on Svalbard
(Peer reviewed; Journal article, 2004)The impact of recent natural and human-induced environmental change on chironomid faunas on Svalbard has been investigated. The modern chironomid fauna was studied from surface-sediment samples collected from 23 lakes in ... -
Environmental change and atmospheric contamination on Svalbard: sediment chronology
(Peer reviewed; Journal article, 2004)Sediment cores collected from eight lakes along the western coast of Svalbard as part of a project investigating atmospheric pollution and environmental change in Arctic regions were dated radiometrically using natural ... -
Geomicrobial characterisation of a 60 m long permafrost core, taken over a future CO2 storage site at Svalbard
(Master thesis, 2014-09-11)In connection with a planned CO2 storage pilot project in the Arctic, a 60 m long permafrost core was drilled in Adventdalen, Svalbard, representing the poorly studied deep permafrost ecosystems. The on-shore drilling was ... -
Holocene multi-proxy environmental reconstruction from lake Hakluytvatnet, Amsterdamøya Island, Svalbard (79.5°N)
(Journal article, 2018-03)High resolution proxy records of past climate are sparse in the Arctic due to low organic production that restricts the use of radiocarbon dating and challenging logistics that make data collection difficult. Here, we ... -
How will thawing permafrost affect the microbial abundance and diversity in the Arctic?
(Master thesis, 2020-07-09)Permafrost, permanently frozen soil, constitutes a major portion of the Earth’s terrestrial cryosphere and represents a unique niche for cold-adapted microorganisms. As the global temperature increases, it is still unknown ... -
Improved stock estimation for Iceland scallops (Chlamys islandica) in the Svalbard area
(Master thesis, 2023-06-03)Iceland scallops (Chlamys islandica) were commercially harvested in the Svalbard fishery protection zone (FPZ) from 1986 to 1992, when the fishery ended due to overfishing. After approximately 30 years of prohibition, a ... -
Interannual variations of freshwater content in Hornsund
(Master thesis, 2015-05-04)Salinity measurements have been used to calculate the freshwater content in Hornsund for the years 2001 to 2014. In 2011 there was significantly higher freshwater content in the fjord, compared to the other years, with a ... -
Lake-sediment evidence for local and remote sources of atmospherically deposited pollutants on Svalbard
(Peer reviewed; Journal article, 2004)Twenty-one lakes along the west coast of Svalbard were cored between 28 July and 14 August 1995. Five cores were 210Pb dated and analysed for spheroidal carbonaceous particles (SCPs), indicators of deposition from fossil-fuel ... -
Loss of sea ice during winter north of Svalbard
(Peer reviewed; Journal article, 2014-06-05)Sea ice loss in the Arctic Ocean has up to now been strongest during summer. In contrast, the sea ice concentration north of Svalbard has experienced a larger decline during winter since 1979. The trend in winter ice area ... -
Microbial winter and spring bloom dynamics in a high Arctic fjord
(Master thesis, 2014-06-02)Knowledge of the seasonal dynamics within the Arctic marine microbial network is scarce, particularly during the polar night period. The abundances of different microbial groups in Adventfjorden, Svalbard were investigated ... -
Novel and Unexpected Microbial Diversity in Acid Mine Drainage in Svalbard (78° N), Revealed by Culture-Independent Approaches
(Peer reviewed; Journal article, 2015-10-13)Svalbard, situated in the high Arctic, is an important past and present coal mining area. Dozens of abandoned waste rock piles can be found in the proximity of Longyearbyen. This environment offers a unique opportunity for ... -
Petrophysical characterization in paleokarst and effect on reservoir properties
(Master thesis, 2012-06-29)Karst is a geological process that can enhance porosity and permeability within a carbonate succession, thus affecting the heterogeneity producing a substantial effect on the fluid flow. The subject is not widely explored ... -
Processing and Interpretation of Multichannel Seismic Reflection Data Acquired off Isfjorden, Svalbard
(Master thesis, 2022-10-03)The Svalbard archipelago has been complexly deformed during its billions of years-long evolution history, where fault zones, other deformation structures and hard seafloor morphology have emerged. This research project has ...