Browsing Geophysical Institute by Title
Now showing items 1222-1241 of 1296
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Using machine learning algorithms to enhance numerical weather prediction
(Master thesis, 2022-11-21)In this master thesis machine learning algorithms have been used in an effort to enhance numerical weather prediction. The learning algorithms used are random forest to provide a no precipitation/precipitation classification, ... -
Utilizing Solar Vapour Energy by Use of Nanofluids in a Direct Absorption Solar Collector
(Master thesis, 2018-01)Traditional solar thermal collectors and photovoltaic (PV) systems suffer from low energy conversion efficiencies. This is mainly due to high thermal losses from overheated absorber plates or solar cells. For steam generation ... -
UV-stråling i Norge Satellittestimater, modellestimater og bakkemålinger
(Master thesis, 2005) -
Validating Finescale Parameterizations for the Eastern Arctic Ocean Internal Wave Field
(Journal article; Peer reviewed, 2023)In the Arctic Ocean, vertical transport of heat by turbulent mixing is ultimately coupled to the sea-ice cover, with immediate and far-reaching impacts on the climate and ecosystem. Unfortunately, direct observations of ... -
Validation of boundary layer parameterization schemes in the Weather Research and Forecasting Model (WRF) under the aspect of offshore wind energy applications - Part II: Boundary layer height and atmospheric stability
(Peer reviewed; Journal article, 2015-07)Five different planetary boundary layer (PBL) schemes in the Weather Research and Forecasting (WRF) model have been tested with respect to their capability to model boundary layer parameters relevant for offshore wind ... -
Validation of precipitation forecasts from the AROME numerical weather prediction model in Norway
(Master thesis, 2022-11-21)High-quality precipitation forecasts are key to ensure the public and economic safety during severe precipitation events, and the process of validating these forecasts is a continuous effort. But with Norway's varied climate ... -
Variability along the Atlantic water pathway in the forced Norwegian Earth System Model
(Peer reviewed; Journal article, 2018-03-27)The growing attention on mechanisms that can provide predictability on interannual-to-decadal time scales, makes it necessary to identify how well climate models represent such mechanisms. In this study we use a high (0.25° ... -
Variability and decadal trends in the Isfjorden (Svalbard) ocean climate and circulation – An indicator for climate change in the European Arctic
(Journal article; Peer reviewed, 2020)Isfjorden, a broad Arctic fjord in western Spitsbergen, has shown significant changes in hydrography and inflow of Atlantic Water (AW) the last decades that only recently have been observed in the Arctic Ocean north of ... -
Variability and mixing of the Filchner overflow plume on the continental slope,Weddell Sea
(Peer reviewed; Journal article, 2019-01)A large fraction of Antarctic Bottom Water is produced in the Weddell Sea, through mixing between the cold and dense shelf water masses and the warm and saline off-shelf water. We present observations of the dense Filchner ... -
Variability at Ocean Weather Station M in the Norwegian Sea
(ICES Marine Science Symposia; 219, Chapter, 2003)Time series of temperature and salinity from Ocean Weather Station M are analysed for periodic cycles of interannual to decadal scale. Time evolutions of the spectra show various spectral peaks at all depths, but none of ... -
Variability in deep water mass properties and mixing in the Norwegian Sea
(Master thesis, 2016-12-19)Decadal variations of the Norwegian Sea Deep Water are presented for the 1990s and 2000s. While salinity values have only slightly increased for the Norwegian Basin, there is a noticeable increase in potential temperature ... -
Variability in hydrochemical properties and composition of the dense water in the Faroese Channels
(Master thesis, 2018-06-21)The temporal variability in deep water properties and composition in both Faroe-Shetland and Faroe Bank Channel were examined in June 2002, July 2009, and April 2015. Differences in the water column structure and property ... -
Variability in the Geostrophic Flow of the Agulhas Current, an Investigation of Sea Surface Height Obtained from Altimetry Data
(Master thesis, 2015-06-15)The distinct and robust structure of the greater Agulhas Current regime southeast of southern Africa was depicted in the spatial pattern of the absolute dynamic topography. As a part of Work Package 3: Environmental driver, ... -
Variable Nordic Seas Inflow Linked to Shifts in North Atlantic Circulation
(Journal article; Peer reviewed, 2021)The inflow across the Iceland-Scotland Ridge determines the amount of heat supplied to the Nordic Seas from the subpolar North Atlantic (SPNA). Consequently, variable inflow properties and volume transport at the ridge ... -
Variations of Mixed Layer Depth and Water Properties in the Norwegian Sea for the period 1949-1999
(Peer reviewed; Journal article, 2006-06-08)The mixed layer of the ocean and the processes therein affect the ocean’s biological production, the exchanges with the atmosphere, and the water modification processes important in a climate change per- spective. To provide ... -
Velocity spectra and coherence estimates in the marine atmospheric boundary layer
(Journal article; Peer reviewed, 2018)Two years of continuous sonic anemometer measurements conducted in 2007 and 2008 at the FINO1 platform are used to investigate the characteristics of the single- and two-point velocity spectra in relation to the atmospheric ... -
Vertical Convergence of Turbulent and Double-Diffusive Heat Flux Drives Warming and Erosion of Antarctic Winter Water in Summer
(Journal article; Peer reviewed, 2023)The seasonal warming of Antarctic Winter Water (WW) is a key process that occurs along the path of deep water transformation to intermediate waters. These intermediate waters then enter the upper branch of the circumpolar ... -
Vertical diffusivity and oxygen concentrations in a fjord basin - A case study of the deep basin in Masfjorden
(Master thesis, 2021-06-01)The basin layer in a sill fjord is isolated from the coast, and may become hypoxic or anoxic if the renewal frequency is low. Deep water renewals and vertical mixing are the physical processes which affects the oxygen ... -
Vertical fluxes of nitrate in the seasonal nitracline of the Atlantic sector of the Arctic Ocean
(Peer reviewed; Journal article, 2016-07)This study compiles colocated oceanic observations of high-resolution vertical profiles of nitrate concentration and turbulent microstructure around the Svalbard shelf slope, covering both the permanently ice-free Fram ...