Browsing Faculty of Mathematics and Natural Sciences by Title
Now showing items 9836-9855 of 9919
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Widespread glacial erosion on the Scandinavian passive margin
(Journal article; Peer reviewed, 2021)The topography in Scandinavia features enigmatic high-elevation low-relief plateau regions dissected by deep valleys and fjords. These plateau regions have long been interpreted as relict landforms of a preglacial origin, ... -
Width Notions for Ordering-Related Problems
(Journal article; Peer reviewed, 2020)We are studying a weighted version of a linear extension problem, given some finite partial order ρ, called Completion of an Ordering. While this problem is NP-complete, we show that it lies in FPT when parameterized by ... -
Wild and farmed salmon (Salmo salar) as reservoirs for infectious salmon anaemia virus, and the importance of horizontal- and vertical transmission
(Peer reviewed; Journal article, 2019-04-16)The infectious salmon anaemia virus (ISAV) is an important pathogen on farmed salmon in Europe. The virus occurs as low- and high virulent variants where the former seem to be a continuous source of new high virulent ISAV. ... -
Will Climate Change Impact Polar NOx Produced by Energetic Particle Precipitation?
(Journal article; Peer reviewed, 2020)Energetic electron precipitation (EEP) is an important source of polar nitrogen oxides (NOx) in the upper atmosphere. During winter, mesospheric NOx has a long chemical lifetime and is transported to the stratosphere by ... -
Willow canopies and plant community structure along an alpine environmental gradient
(Peer reviewed; Journal article, 2005)We examined the impact of Salix lapponum canopies on plantcommunity structure in five sites along a climatic gradient in aglacier foreland in alpine south Norway. Species richness is lowerinside canopies compared to outside ... -
Wilson line correlators beyond the large-Nc
(Journal article; Peer reviewed, 2021)We study hard 1 → 2 final-state parton splittings in the medium, and put special emphasis on calculating the Wilson line correlators that appear in these calculations. As partons go through the medium their color continuously ... -
Wind and wave extremes over the world oceans from very large ensembles
(Peer reviewed; Journal article, 2014-07)Global return values of marine wind speed and significant wave height are estimated from very large aggregates of archived ensemble forecasts at +240 h lead time. Long lead time ensures that the forecasts represent independent ... -
Wind coherence measurement by a single pulsed Doppler wind lidar
(Peer reviewed; Journal article, 2016-09)A single pulsed Doppler wind lidar, deployed at the FINO1 platform in the North Sea, has been used to monitor the lateral and vertical coherence of the along-wind component. To maximize the sampling frequency of the ... -
Wind Farm Layout Optimization - A case study on maximizing the annual energy production in Creyke Beck B.
(Master thesis, 2016-06-01)For offshore wind farms, detailed planning, including wind farm design optimization, is becoming increasingly important to secure and increase the wind farm's revenue during its operational life time. Since the energy ... -
Wind Intensity Is Key to Phytoplankton Spring Bloom Under Climate Change
(Peer reviewed; Journal article, 2019-08-30)The onset of the spring bloom (OSB) occurs when phytoplankton growth exceeds losses and is promoted by a transition from deep convection to a shallow mixing layer concurrent with increasing light intensities in nutrient-enriched ... -
Wind Stress in the Coastal Zone: Observations from a Buoy in Southwestern Norway
(Peer reviewed; Journal article, 2019-08-26)Several studies have focused on the investigation of the wind stress in open ocean conditions where coastal processes were negligible. However, the direction and magnitude of the wind stress vector in coastal areas are ... -
Wind stress mediated variability of the Filchner Trough overflow, Weddell Sea
(Peer reviewed; Journal article, 2018-05-06)The Filchner Trough (FT) is a key site for exchange of water masses between the Weddell Sea continental shelf and the deep ocean. Cold and dense Ice Shelf Water (ISW), a precursor for Antarctic Bottom Water, flows north ... -
Wind to insect pollination ratios and floral traits in five alpine Salix species
(Peer reviewed; Journal article, 1999)This study examines the ratio of wind to insect pollination of five alpine-arctic Salix species and possible correlations between plant traits and this ratio. The field work was done in an alpine area in southwest Norway, ... -
Wind-driven upwelling of iron sustains dense blooms and food webs in the eastern Weddell Gyre
(Journal article; Peer reviewed, 2023)The Southern Ocean is a major sink of anthropogenic CO2 and an important foraging area for top trophic level consumers. However, iron limitation sets an upper limit to primary productivity. Here we report on a considerably ... -
Wind-Driven Variability in the Spitsbergen Polar Current and the Svalbard Branch Across the Yermak Plateau
(Journal article; Peer reviewed, 2021)The Yermak Plateau (YP) acts as a guidance or barrier for the West Spitsbergen Current (WSC), which either crosses the plateau or flows around it to enter the Arctic Ocean. Closer to the West Spitsbergen coast, the Spitsbergen ... -
Wind-Generated Waves in Fjords and Coastal Areas
(Doctoral thesis, 2021-09-02)Accurate predictions of coastal and fjord wave conditions are vital for several sectors such as fish farming, fisheries, as well as coastal and maritime infrastructure. In complex coastlines such as the Norwegian coast ... -
Winning ways with hydrogen sulphide on the Namibian shelf
(Peer reviewed; Journal article, 2018-10-11)The shelf sediments off Namibia are some of the most unusual and extreme marine habitats because of their extremely high hydrogen sulphide concentrations. High surface productivity of the northern Benguela upwelling system ... -
Winter Arctic Amplification at the synoptic timescale, 1979–2018, its regional variation and response to tropical and extratropical variability
(Journal article; Peer reviewed, 2021)We investigate winter Arctic Amplification (AA) on synoptic timescales and at regional scales using a daily version of the Arctic Amplification Index (AAI) and examine causes on a synoptic scale. The persistence, frequency ... -
Winter circulation anomalies in 2009/10 & 2013/14, and associated forcing mechanisms
(Master thesis, 2016-05-31)Recent cases of severe winter weather in midlatitude regions have been linked to large-scale atmospheric circulation anomalies, but the physical mechanisms driving such anomalies are poorly understood. In this study the ... -
Winter storms accelerate the demise of sea ice in the Atlantic Sector of the Arctic Ocean
(Peer reviewed; Journal article, 2019-06-25)A large retreat of sea-ice in the ‘stormy’ Atlantic Sector of the Arctic Ocean has become evident through a series of record minima for the winter maximum sea-ice extent since 2015. Results from the Norwegian young sea ICE ...