Blar i Nansen Environmental and Remote Sensing Center (NERSC) på utgivelsesdato
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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 ... -
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 ... -
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) -
Diapycnal Mixing in a Conceptual Model of the Atlantic Meridional Overturning Circulation
(Journal article, 2006)A three-box model of the Atlantic Ocean is used to examine the influence different parameterisations of the diapycnal mixing may have on the large scale dynamics of the ocean circulation. Special emphasis is given to the ... -
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 ... -
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 ... -
Future climate change: Modeling and scenarios for the Arctic
(Arctic Climate Impact Assessment (ACIA) Scientific Report;, Chapter, 2005-09) -
Multisensor approach to automated classification of sea ice image data
(Journal article; Peer reviewed, 2005-07)A multisensor data fusion algorithm based on a multilayer neural network is presented for sea ice classification in the winter period. The algorithm uses European Remote Sensing (ERS), RADARSAT synthetic aperture radar ... -
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 ... -
A preliminary study on the relationship between Arctic Oscillation and daily SLP variance in the Northern hemisphere during wintertime
(Journal article; Peer reviewed, 2005-01-20)In the present study, the authors investigated the relationship between the Arctic Oscillation (AO) and the high-frequency variability of daily sea level pressures in the Northern Hemisphere in winter (November through ... -
An intercomparison of large-eddy simulations of the stable boundary layer
(Journal article, 2005)Results are presented from the first intercomparison of Large-eddy simulation (LES) models for the stable boundary layer (SBL), as part of the GABLS (Global Energy and Water Cycle Experiment Atmospheric Boundary Layer ... -
Heat and Mass Transfer Laws for Turbulent Convective Flows in the Atmosphere over Leads in Ice Covered Oceans, C32A-1123, American Geophysical Union (AGU) Fall Meeting, 5-9 December, San-Francisco, USA
(Conference poster, 2005)Patches of open water (cracks, leads and polynias, Figure 1) in theice cover give major contributions to turbulent exchanges of heat, moisture, CO2 and other gases between the atmosphere and Polar oceans. Here, convective ... -
Evaluating Global Ocean Carbon Models: The Importance of Realistic Physics
(Peer reviewed; Journal article, 2004-09-15)A suite of standard ocean hydrographic and circulation metrics are applied to the equilibrium physical solutions from 13 global carbon models participating in phase 2 of the Ocean Carbon-cycle Model Intercomparison Project ... -
Evaluation of ocean carbon cycle models with data-based metrics
(Journal article; Peer reviewed, 2004-04-02)New radiocarbon and chlorofluorocarbon-11 data from the World Ocean Circulation Experiment are used to assess a suite of 19 ocean carbon cycle models. We use the distributions and inventories of these tracers as quantitative ... -
An intercomparison between the surface heat flux feedback in five coupled models, COADS and the NCEP reanalysis
(Journal article; Peer reviewed, 2004-04)The surface heat flux feedback is estimated in the Atlantic and the extra-tropical Indo-Pacific, using monthly heat flux and sea surface temperature anomaly data from control simulations with five global climate models, ... -
Last Glacial Maximum over China: Sensitivities of climate to paleovegetation and Tibetan ice sheet
(Journal article; Peer reviewed, 2003-02-06)With the boundary conditions appropriate for the Last Glacial Maximum (LGM), including ice sheets, sea surface temperatures, sea-ice distribution, atmospheric CO2 concentration, the Earth’s orbital parameters, topography, ... -
Mesoscale modeling study of the oceanographic conditions off the southwest coast of India
(Journal article; Peer reviewed, 2002-09)A high resolution model, using the Miami Isopycnic Coordinate Ocean Model (MICOM), has been implemented for the first time to study the seasonal circulation and coastal upwelling off the southwest Indian coast during 1974. ... -
Toward an optimal inversion method for synthetic aperture radar wind retrieval
(Journal article; Peer reviewed, 2002-08-01)In recent years, particular efforts have been made to derive wind fields over the oceans from synthetic aperture radar (SAR) images. In contrast with the scatterometer, the SAR has a higher spatial resolution and therefore ...