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Titel |
SLIM: A multi-scale model of the land-sea continuum |
VerfasserIn |
T. De Maet, E. Hanert, E. Deleersnijder, T. Fichefet, V. Legat, J. F. Remacle, S. Soares Frazao, M. Vanclooster, J. Lambrechts, C. König Beatty, S. Bouillon, B. de Brye, O. Gourgue, T. Kärnä, O. Lietaer, A. Pestiaux, K. Slaoui, C. Thomas |
Konferenz |
EGU General Assembly 2012
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Medientyp |
Artikel
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Sprache |
Englisch
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Digitales Dokument |
PDF |
Erschienen |
In: GRA - Volume 14 (2012) |
Datensatznummer |
250067290
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Zusammenfassung |
The hydrosphere is made up of a number media, such as the oceans, the shelf seas, the
estuaries, the rivers, the land surface and ground water as well as the sea ice - which, for the
sake of simplicity, is considered herein to be part of the hydrosphere. The processes taking
place in these domains are vastly different in nature and are characterized by a
wide range of space- and time-scales. The components of the hydrosphere interact
with each other. For instance, the shallow marine and estuarine regions, though
accounting for less than 1% of the volume of the oceans, have a biomass far from
negligible as compared to that of the oceans, implying that they play a significant
role in global biogeochemical cycles. This is one of the reasons why models are
now needed that deal with most, if not all, of the components of the hydrospheric
system.
Numerical models of each of the components of the hydrosphere already exist. However,
an integrated model of the whole hydrosphere has yet to be developed. Building such a model
is a daunting task, requiring the development of multi-scale/physics simulation tools.
Numerical methods for dealing with multi-scale problems are developing rapidly.
Unstructured meshes offer an almost infinite geometrical flexibility, allowing the space
resolution to be increased when and where necessary. In addition, time steppings for dealing
with a wide spectrum of timescales while retaining a high order of accuracy have been
developed over recent years (e.g. multi-rate schemes).
The Discontinuous Galerkin Finite Element (DGFE) framework SLIM is at his third
implementation. It has been build on the GMSH code (http://geuz.org/gmsh), which a
state-of-the-art open-source meshing tool. This allows the use of the same definitions and
easy interactions between the mesher and the model. Moreover, this provides the same
user interface for meshing and visualizing results. It also enables the use of the
most recent advances in mesh generation, as GMSH has a large and very active
community of users/developpers. The DGFE code himself is coded in C++ and uses a
python user-interface. Each simulation is build in a python script, which allows a
total flexibility, and the core of the code is compiled, which allows for optimal
performances.
We well present the current status of SLIM, as well as current developments.
Informations on SLIM can be found at http://www.climate.be/slim. |
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