Nansen Environmental and Remote Sensing Center (NERSC): Nye registreringer
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Inverse Methods and Data Assimilation in Nonlinear Ocean Models
(Journal article, 1994-10-01)An overview is given of the current status of inverse methods and data assimilation for nonlinear ocean models. The inverse theory for time dependent dynamical models is formulated and the most promising solution methods ... -
Data assimilation for coastal zone monitoring and forecasting
(Elsevier oceanography series. (EuroGOOS publication no. 7), Chapter, 1997) -
Using the Extended Kalman Filter with a Multilayer Quasi-Geostrophic Ocean Model
(Journal article, 1992-11-15)The formulation of the extended Kalman filter for a multilayer nonlinear quasi-geostrophic ocean circulation model is discussed. The nonlinearity in the ocean model leads to an approximative equation for error covariance ... -
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 ... -
Cover ERS-1/2 SAR monitoring of dangerous ice phenomena along the western part of Northern Sea Route
(Journal article; Peer reviewed, 1997-08-01) -
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 ... -
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 -
Sea ice monitoring in the Arctic using satellite SAR images
(NERSC thesis, Master thesis, 2007) -
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 ... -
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 ... -
Sea ice investigations in the Laptev Sea area in late summer using SAR data
(Journal article; Peer reviewed, 2001-10)The Laptev Sea area, including the Vilkitsky Strait, is an important part of the Northern Sea Route where the presence of sea ice makes navigation difficult even in the summer season. The objective of this study was therefore ... -
The impact of ensemble filter definition on the assimilation of temperature profiles in the tropical Pacific
(Journal article; Peer reviewed, 2005-10)The traditional analysis scheme in the Ensemble Kalman Filter (EnKF) uses a stochastic perturbation or randomization of the measurements which ensures a correct variance in the updated ensemble. An alternative so called ... -
Resistance and heat-transfer laws for stable and neutral planetary boundary layers: old theory advanced and re-evaluated
(Journal article; Peer reviewed, 2005-07)The planetary boundary layer (PBL) resistance and heat-transfer laws express the surface fluxes of momentum and heat through the PBL governing parameters. Since the late sixties, the dimensionless coefficients (A, B and ... -
Surface Atmospheric Temperature as Indicator of Climate Change in the Arctic
(Conference poster, 2005-12)Surface atmospheric temperature (SAT) is one of the most reliable atmospheric characteristics used to quantify climate change. Contrary to what has been always implicitly assumed, changes in the SAT have loose relations ... -
Modelling of deep-sea gravity currents using an integrated plume model
(Geophysical Monograph Series; 85, Chapter, 1994) -
Universal Dependences between Turbulent and Mean Flow Parameters in Stably and Neutrally Stratified Planetary Boundary Layers
(Journal article; Peer reviewed, 2006-05-08)We consider the resistance law for the planetary boundary layer (PBL) from the point of view of the similarity theory. In other words, we select the set of the PBL governing parameters and search for an optimal way to ... -
A Hybrid Coordinate Ocean Model for shelf sea simulation
(Journal article, 2006-03-03)The general circulation in the North Sea and Skagerrak is simulated using the Hybrid Coordinate Ocean Model (HYCOM). Although HYCOM was originally de- veloped for simulations of the open ocean, it has a design which should ... -
Sea Ice Monitoring by Remote Sensing
(, Chapter, 2006) -
Earth science – oceanography
(Chapter, 2002)Satellite oceanography began with the Gemini XII flight in November 1966. From a Hasselblad camera mounted in the pilot’s window large internal waves in the eastern tropical Atlantic were photographed via sunglitter for ... -
Microwave Study programs of Air-Ice-Ocean interactive processes in the Seasonal Ice Zone of the Greenland and Barents Seas
(Geophysical Monograph 68, Chapter, 1992)Describes the use of satellite ice data into a working technology for the satellite data sets of the recent past and immediate future. Chapters cover basic observations, modeling, geophysical interpretation, and using data ...