Browsing Research centres and projects by Subject "VDP::Matematikk og Naturvitenskap: 400"
Now showing items 21-40 of 46
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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 ... -
JASPAR, the open access database of transcription factor-binding profiles: new content and tools in the 2008 update
(Journal article; Peer reviewed, 2007-11-15)JASPAR is a popular open-access database for matrix models describing DNA-binding preferences for transcription factors and other DNA patterns. With its third major release, JASPAR has been expanded and equipped with ... -
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 ... -
Modelling of deep-sea gravity currents using an integrated plume model
(Geophysical Monograph Series; 85, Chapter, 1994) -
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 ... -
Molecular characterization of the apical organ of the anthozoan Nematostella vectensis
(Journal article; Peer reviewed, 2014-12-03)Apical organs are sensory structures present in many marine invertebrate larvae where they are considered to be involved in their settlement, metamorphosis and locomotion. In bilaterians they are characterised by a tuft ... -
Observing the Ocean from Space: Emerging Capabilities in Europe
(Chapter, 2001-12)During the first decade of the 21st century Earth observation from satellites will be faced with two major demands: provision of continuity missions and launch of new exploratory missions. This paper addresses European ... -
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 ... -
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 ... -
Open Boundary Conditions for the Extended Kalman Filter With a Quasi-Geostrophic Ocean Model
(Journal article, 1993-05-18)The formulation of consistent boundary conditions for the quasi-geostrophic (QG) model with an extended Kaiman filter in a data assimilation scheme is discussed. To form a well-posed boundary value problem for the QG model, ... -
Parameter Estimation Solving a Weak Constraint Variational Formulation for an Ekman Model
(Journal article, 1997-06-15)A weak constraint variational formulation is used for inverse calculations and parameter estimation in a one-dimensional Ekman model. When parameters in the model are allowed to contain errors, the inverse problem becomes ... -
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 ... -
Regulation of Nematostella neural progenitors by SoxB, Notch and bHLH genes
(Journal article; Peer reviewed, 2015-10-06)Notch signalling, SoxB and Group A bHLH ‘proneural’ genes are conserved regulators of the neurogenic program in many bilaterians. However, the ancestry of their functions and interactions is not well understood. We address ... -
Remote sensing of sea ice
(OceanObs’09 Community White Paper, Conference lecture, 2009-09) -
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 ... -
Sea Ice Monitoring by Remote Sensing
(, Chapter, 2006) -
Sea ice monitoring in the Arctic using satellite SAR images
(NERSC thesis, Master thesis, 2007) -
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 ... -
Sequential data assimilation with a nonlinear quasi-geostrophic model using Monte Carlo methods to forecast error statistics
(Journal article, 1994-05-15)A new sequential data assimilation method is discussed. It is based on forecasting the error statistics using Monte Carlo methods, a better alternative than solving the traditional and computationally extremely demanding ... -
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 ...