Blar i Research centres and projects på emneord "Oceanography"
Viser treff 21-30 av 30
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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 ... -
Satellite detection of natural films on the ocean surface
(Journal article; Peer reviewed, 1996-11-01)Natural films on the ocean surface influence air-sea fluxes of momentum, heat, and gas. It is therefore essential to be able to map the geographical extent and variability of such films to determine the resulting impact ... -
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 ... -
Sea Ice Monitoring by Remote Sensing
(, Chapter, 2006) -
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 ... -
Two-phase, near-field modeling of purposefully released CO2 in the ocean
(Journal article; Peer reviewed, 2001-01-15) -
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 ...