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Lateral Open Boundary Conditions for Nested Limited Area Model: Process selective approach
Language
English
Obiettivo Specifico
3.11. Oceanografia Dinamica
3.7. Dinamica del clima e dell'oceano
Status
Published
JCR Journal
JCR Journal
Peer review journal
Yes
Title of the book
Issue/vol(year)
/20(2008)
Publisher
ELSEVIER
Pages (printed)
134–156
Issued date
2008
Alternative Location
Keywords
Abstract
This paper reviews current approaches to the lateral open boundary condition problem for nested regional primitive
equation ocean numerical models and proposes a new approach that considers a scale decomposition of the nesting field
variables for the barotropic lateral velocity boundary conditions. The Flather [Flather, R.A., 1976. A tidal model of the
north-west European continental shelf. Memories de la Societe Royale des Sciences de Liege 6 (10):141–164] open lateral
boundary condition is derived from mass conservation considerations and we use this approach to derive a generalized
lateral open boundary condition for barotropic velocities. In addition we do a scale selective decomposition of the generalized
Flather obtaining new and general lateral scale dependent boundary conditions. The performance of the new lateral
boundary conditions have been evaluated in two kinds of experiments: (1) idealized and (2) realistic frameworks. In the
idealized framework, as well as the realistic case, the results confirms that the scale selective open boundary conditions
improves the solution almost everywhere but in particular in the shallow depth parts of the model domain. In the realistic
case the assessment is more difficult and it is connected also to the capability of the nesting and nested model to reproduce
the dynamics contained in the observations.
equation ocean numerical models and proposes a new approach that considers a scale decomposition of the nesting field
variables for the barotropic lateral velocity boundary conditions. The Flather [Flather, R.A., 1976. A tidal model of the
north-west European continental shelf. Memories de la Societe Royale des Sciences de Liege 6 (10):141–164] open lateral
boundary condition is derived from mass conservation considerations and we use this approach to derive a generalized
lateral open boundary condition for barotropic velocities. In addition we do a scale selective decomposition of the generalized
Flather obtaining new and general lateral scale dependent boundary conditions. The performance of the new lateral
boundary conditions have been evaluated in two kinds of experiments: (1) idealized and (2) realistic frameworks. In the
idealized framework, as well as the realistic case, the results confirms that the scale selective open boundary conditions
improves the solution almost everywhere but in particular in the shallow depth parts of the model domain. In the realistic
case the assessment is more difficult and it is connected also to the capability of the nesting and nested model to reproduce
the dynamics contained in the observations.
Sponsors
This work was partially supported by the MERSEA project (EU project FP6 SIP3-CT-
2003-502885) and the ADRICOSM Pilot Project, funded by the Italian Ministry of Environment.
2003-502885) and the ADRICOSM Pilot Project, funded by the Italian Ministry of Environment.
Type
article
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