Abstract
The present study consists of two parts. Part 1 is the smallest. It considers the use of a special explicit finite difference scheme for the horizontal discretization in numerical models. The second and largest part of the study describes the implementation, testing and use of the Flow Relaxation Scheme (FRS) as lateral open boundary condition in numerical ocean models. The FRS was originally designed for use in atmospheric limited area models to relax external solutions from a large area model towards solutions in a limited area model, often with a finer horizontal grid resolution. Thus, the FRS acts as a one-way influence nesting technique. The FRS is applied as lateral open boundary condition in the operational atmospheric forecast model (LAM) at the Norwegian Meteorological Institute (DNMI). The first work describes the implementation and testing of the FRS in a barotropic ocean model with an idealized geometry. The second work studies the use of the FRS in a fully three-dimensional ocean model applied for a real topography covering the North East Atlantic, the Greenland and Norwegian Seas, the Barents Sea and the North Sea. In dealing with regional ocean models, proper open boundary conditions are a crucial factor for obtaining a
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Engedahl, H
[1]
- Norwegian Meteorological Inst., Oslo (Norway)
Citation Formats
Engedahl, H.
Use of explicit finite-difference schemes and lateral open boundary conditions in numerical ocean models.
Norway: N. p.,
1992.
Web.
Engedahl, H.
Use of explicit finite-difference schemes and lateral open boundary conditions in numerical ocean models.
Norway.
Engedahl, H.
1992.
"Use of explicit finite-difference schemes and lateral open boundary conditions in numerical ocean models."
Norway.
@misc{etde_10110656,
title = {Use of explicit finite-difference schemes and lateral open boundary conditions in numerical ocean models}
author = {Engedahl, H}
abstractNote = {The present study consists of two parts. Part 1 is the smallest. It considers the use of a special explicit finite difference scheme for the horizontal discretization in numerical models. The second and largest part of the study describes the implementation, testing and use of the Flow Relaxation Scheme (FRS) as lateral open boundary condition in numerical ocean models. The FRS was originally designed for use in atmospheric limited area models to relax external solutions from a large area model towards solutions in a limited area model, often with a finer horizontal grid resolution. Thus, the FRS acts as a one-way influence nesting technique. The FRS is applied as lateral open boundary condition in the operational atmospheric forecast model (LAM) at the Norwegian Meteorological Institute (DNMI). The first work describes the implementation and testing of the FRS in a barotropic ocean model with an idealized geometry. The second work studies the use of the FRS in a fully three-dimensional ocean model applied for a real topography covering the North East Atlantic, the Greenland and Norwegian Seas, the Barents Sea and the North Sea. In dealing with regional ocean models, proper open boundary conditions are a crucial factor for obtaining a satisfactory circulation. The problems regarding the treatment of open boundaries in numerical ocean models has been a subject of rather intense investigations and studies over the last years. No really general solution seems to have been obtained, and often a pragmatic approach has been taken in using whichever method works best in each given situation. However, the FRS has shown good performance in many different ocean settings such as simulation of tidal motions, storm surges, wind-driven and climatological circulations. Thus, it may be regarded as a possible candidate for a more unified treatment of lateral open boundaries in numerical ocean models. 46 refs., 47 figs., 1 tab.}
place = {Norway}
year = {1992}
month = {Dec}
}
title = {Use of explicit finite-difference schemes and lateral open boundary conditions in numerical ocean models}
author = {Engedahl, H}
abstractNote = {The present study consists of two parts. Part 1 is the smallest. It considers the use of a special explicit finite difference scheme for the horizontal discretization in numerical models. The second and largest part of the study describes the implementation, testing and use of the Flow Relaxation Scheme (FRS) as lateral open boundary condition in numerical ocean models. The FRS was originally designed for use in atmospheric limited area models to relax external solutions from a large area model towards solutions in a limited area model, often with a finer horizontal grid resolution. Thus, the FRS acts as a one-way influence nesting technique. The FRS is applied as lateral open boundary condition in the operational atmospheric forecast model (LAM) at the Norwegian Meteorological Institute (DNMI). The first work describes the implementation and testing of the FRS in a barotropic ocean model with an idealized geometry. The second work studies the use of the FRS in a fully three-dimensional ocean model applied for a real topography covering the North East Atlantic, the Greenland and Norwegian Seas, the Barents Sea and the North Sea. In dealing with regional ocean models, proper open boundary conditions are a crucial factor for obtaining a satisfactory circulation. The problems regarding the treatment of open boundaries in numerical ocean models has been a subject of rather intense investigations and studies over the last years. No really general solution seems to have been obtained, and often a pragmatic approach has been taken in using whichever method works best in each given situation. However, the FRS has shown good performance in many different ocean settings such as simulation of tidal motions, storm surges, wind-driven and climatological circulations. Thus, it may be regarded as a possible candidate for a more unified treatment of lateral open boundaries in numerical ocean models. 46 refs., 47 figs., 1 tab.}
place = {Norway}
year = {1992}
month = {Dec}
}