Blar i Geophysical Institute på emneord "VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452"
Viser treff 1-20 av 21
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Arctic/Atlantic exchanges via the Subpolar Gyre
(Peer reviewed; Journal article, 2012)In the present study we investigate the decadal variability in the strength and shape of the Subpolar Gyre (SPG) in a 600-year pre-industrial simulation using the Bergen Climate Model. The atmospheric influence on the SPG ... -
Barents Sea ice cover reflects Atlantic inflow
(Journal article, 2011)The recent Arctic winter sea-ice retreat is most pronounced in the Barents Sea. Using available observations of the Atlantic inflow to the Barents Sea and results from a regional ice-ocean model we assess the role of ... -
Baroclinic Instability in the West Spitsbergen Current
(Peer reviewed; Journal article, 2011-07-15)Baroclinic instability in the West Spitsbergen Current is investigated, based on data from an array of current meter moorings along 78.83oN, across the deeper (1000-2400 m) section of the continental slope west of Svalbard. ... -
Barotropic instability in the West Spitsbergen Current
(Peer reviewed; Journal article, 2010-07-24)Barotropic instability in the shoreward branch of the West Spitsbergen Current is investigated on the basis of data from an array of current meter moorings along 78.83°N, across the upper continental slope and shelf break ... -
Carbon to nutrient ratios in marine systems: understanding natural variability Studies of seasonal, inter-annual and regional variability
(Doctoral thesis, 2012-06-29)Ecological stoichiometry deals with the coupling of the carbon (C), nitrogen (N) and phosphorus (P) cycles at the base of the aquatic food webs. Variation in C:N:P stoichiometry is driven by a multitude of factors, and the ... -
Changes in the properties and distribution of the intermediate and deep waters in the Fram Strait
(Peer reviewed; Journal article, 2012-04)The Fram Strait is the only deep connection between the Arctic Ocean and the Nordic Seas (Greenland, Iceland, and Norwegian Seas), with a sill depth of approximately 2600 m. Consequently, observations from this area reflect ... -
Circulation and transformation of Atlantic and Arctic water masses in climate models
(Doctoral thesis, 2011-12-09)Ocean heat transport and associated heat loss to the atmosphere contributes significantly to the anomalously mild climate of northwestern Europe and its variability. In this thesis, the circulation and transformation of ... -
Dense water formation and circulation in the Barents Sea
(Peer reviewed; Journal article, 2011)Dense water masses from Arctic shelf seas are an important part of the Arctic thermohaline system. We present previously unpublished observations from shallow banks in the Barents Sea, which reveal large interannual ... -
Dispersion and abundance of salmon lice (Lepeophtheirus salmonis) in a Norwegian fjord system
(Master thesis, 2011-11-20)Based on numerical results of currents from a high resolution fjord model, dispersion of salmon lice (Lepeophtheirus salmonis) in the Hardangerfjord has been modelled. The results show that salmon lice abundance in the ... -
The fate of the Atlantic Water in the North Icelandic Irminger Current
(Master thesis, 2012-01-19)The fate of the Atlantic Water within the North Icelandic Irminger Current has long been questioned. The North Icelandic Irminger Current flows along the Icelandic shelf area to the west and north of Iceland, bringing warm ... -
Growing Ice in a Tank: Young Sea Ice Evolution and Turbulence in the Under Ice Boundary Layer
(Master thesis, 2011-11-14)Thin sea ice and its modifications of the oceanic boundary layer are important in the context of the recent retreat of the Arctic sea ice cover. To study turbulence in the under ice boundary layer during thin sea ice growth, ... -
Permeability of young sea ice from microtomographic images
(Master thesis, 2011-02)The permeability of sea ice controls the transport of substances through the ice and thereby its surface properties as well as the exchange of heat, salt and gas between ice, ocean and atmosphere. More observations and ... -
Seasonal variation in marine C:N:P stoichiometry: can the composition of seston explain stable Redfield ratios?
(Peer reviewed; Journal article, 2011)Seston is suspended particulate organic matter, comprising a mixture of autotrophic, heterotrophic and detrital material. Despite variable proportions of these components, marine seston often exhibits relatively small ... -
Studies of Eddies in the Marginal Ice Zone Along the East Greenland Current Using Spaceborne Synthetic Aperture Radar (SAR)
(Master thesis, 2011)The characteristic ice edge eddies in the Marginal Ice Zone (MIZ) are studied based on satellite information from the Advanced Synthetic Aperture Radar (ASAR) instrument. The eddies frequency of existence during the day, ... -
Topographically Controlled Flow in the Isfjorden Trough and the West Spitsbergen Shelf
(Master thesis, 2011-11-20)A one layer numerical model demonstrates how the Atlantic Water (AW) from the West Spitsbergen Current (WSC) is topographically steered onto the West Spitsbergen Shelf (WSS) with a special emphasise on the Isfjorden Trough. ... -
Transport of inorganic carbon through, within, and below the ocean surface
(Doctoral thesis, 2011-03-11)Human emissions of CO2 through the burning of fossil fuel, cement production, and land use change have increased the atmospheric CO2 concentration by 39 % since 1750. Without the large uptake of anthropogenic CO2 by the ... -
A two-layer model for linear stability analysis of shelf-slope currents.
(Research report, 2011)A method for obtaining the normal mode solution of a linear two-layer system over sloping topography has been derived and implemented, providing a basic tool for analysing the disper- sion relation and modal structure of ... -
Vertical mixing in the Arctic Ocean inferred from eXpendable Current Profilers
(Master thesis, 2011-05-31)Recent and historical data sets from different regions of the Arctic Ocean are analysed using velocity profiles from 127 eXpendable Current Profiler (XCP) deployments from the time period 1993 to 2010. The data sets are ... -
Water mass transformation and the North Atlantic Current in three multi-century climate model simulations
(Journal article, 2012-11)The warm and saline Subtropical Water carried by the North Atlantic Current undergoes substantial transformation on its way to higher latitudes as heat is released from ocean to atmosphere. The geographical distribution ...