Blar i Nansen Environmental and Remote Sensing Center (NERSC) på utgivelsesdato
Viser treff 41-60 av 62
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The Influence of large convective eddies on the surface-layer turbulence
(Journal article; Peer reviewed, 2006-06)Close to the surface large coherent eddies consisting of plumes and downdraughts cause convergent winds blowing towards the plume axes, which in turn cause wind shears and generation of turbulence. This mechanism strongly ... -
Characterizing chaotic dispersion in a coastal tidal model
(Journal article, 2006-07-03)Diverse Lagrangian methods are used to study dispersion and mixing in a model in the Norwegian Trondheim fjord. We focus on the tidally driven currents, neglecting wind-forcing, and generate a large number of particle ... -
Passive tracers and active dynamics - a model study of hydrography and circulation in the northern North Atlantic
(Journal article; Peer reviewed, 2006-08)A long-standing problem in oceanography has been to understand the relationship between what can be measured in the ocean, such as hydrography, and what cannot, such as the strength and structure of the complete Meridional ... -
Sea ice monitoring in the Arctic using satellite SAR images
(NERSC thesis, Master thesis, 2007) -
Vulkanar i drivhuset
(Journal article, 2008) -
Formulation of the planetary boundary layer feedback in the Earth´s climate system
(Journal article, 2008)Recent publications have revealed that the state-of-the-art climate models are probably not sensitive enough to observed changes in the surface air temperature. This fact calls for the search of feedback mechanisms making ... -
On the effect of a sill on dense water formation in a marginal sea
(Journal article, 2008-05)The properties of water mass transformation in a semi-enclosed basin, separated from the open ocean by a sill and subject to surface cooling, are analyzed both theoretically and numerically using an ocean general circulation ... -
Dr. Stein Sandven of NERSC on Arctic Regional Ocean Observing Systems
(Interview, 2008-10-17)http://www.sciencepoles.org/interview/arctic-regional-ocean-observing-systems -
Modes of the southern extension of the East Madagascar Current
(Journal article, 2008-11-04)Data sets from satellite observations and a nested high‐resolution model are used to study a source region of the Agulhas Current. Altimeter‐derived geostrophic surface currents are averaged over varying periods, providing ... -
Subpolar Gyre Index and the North Atlantic Meridional Overturning Circulation in a Coupled Climate Model
(Journal article, 2008-11-16)The subpolar gyre index (SPG), derived from the analysis of sea surface height (SSH), is proposed to be a potential indicator for the North Atlantic Meridional Overturning Circulation (AMOC) based on observation as well ... -
Influence of horizontal model grid resolution on the simulated primary production in an embedded primary production model in the Norwegian Sea
(Journal article, 2009)The purpose of this paper is to investigate the influence of horizontal grid resolution in a physical model on an embedded primary production model. The area for the experiment was along the west coast of Norway, from 60◦N ... -
Semi-empirical Algorithm for the Retrieval of Ecology-Relevant Water Constituents in Various Aquatic Environments
(Journal article, 2009-03-10)An advanced operational semi-empirical algorithm for processing satellite remote sensing data in the visible region is described. Based on the Levenberg-Marquardt multivariate optimization procedure, the algorithm is ... -
Hurricane-driven alteration in plankton community size structure in the Gulf of Mexico: A modeling study
(Journal article, 2009-04-03)This was the first study to analyze phytoplankton and zooplankton community size structure during hurricane passage. A three-dimensional biophysical model was used to assess ecosystem dynamics, plankton biomass, and plankton ... -
Ocean data assimilation systems for GODAE
(Oceanography, GODAE Special issue feature, Journal article, 2009-09)Ocean data assimilation has matured to the point that observations are now routinely combined with model forecasts to produce a variety of ocean products. Approaches to ocean data assimilation vary widely both in terms of ... -
Validation and intercomparison studies within GODAE
(Journal article, 2009-09)During the Global Ocean Data Assimilation Experiment (GODAE), seven international operational centers participated in a dedicated modeling system intercomparison exercise from February to April 2008. The objectives were: ... -
Remote sensing of sea ice
(OceanObs’09 Community White Paper, Conference lecture, 2009-09) -
Application of a hybrid EnKF-OI to ocean forecasting
(Journal article, 2009-10-01)Data assimilation methods often use an ensemble to represent the background error covariance. Two approaches are commonly used; a simple one with a static ensemble, or a more advanced one with a dynamic ensemble. The latter ... -
Greenland Ice Sheet Elevation Ehange in Winter and Influence of Atmospheric Teleconnections in the Northern Hemisphere
(Journal article, 2009-11-16) -
Heat in the Barents Sea: Transport, storage, and surface fluxes
(Journal article, 2010-01-11)A column model is set up for the Barents Sea to explore sensitivity of surface fluxes and heat storage from varying ocean heat transport. Mean monthly ocean transport and atmospheric forcing are synthesised and force the ... -
On the Velocity Gradient in Stably Stratified Sheared Flows. Part 2: Observations and Models
(Peer reviewed; Journal article, 2010-05-12)Observations of the dependence of the dimensionless wind speed gradient φm as a function of the Monin–Obukhov stability parameter z/Lo under strong stability diverge from results of large-eddy simulation (LES) modelling. ...