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| Titel |
QUAGMIRE v1.3: a quasi-geostrophic model for investigating rotating fluids experiments |
| VerfasserIn |
P. D. Williams, T. W. N. Haine, P. L. Read, S. R. Lewis, Y. H. Yamazaki |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250019271
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| Zusammenfassung |
| The QUAGMIRE model has recently been made freely available for public use. QUAGMIRE
is a quasi-geostrophic numerical model for performing fast, high-resolution simulations of
multi-layer rotating annulus laboratory experiments on a desktop personal computer. This
presentation describes the model’s main features.
QUAGMIRE uses a hybrid finite-difference/spectral approach to numerically integrate the
coupled nonlinear partial differential equations of motion in cylindrical geometry in each
layer. Version 1.3 implements the special case of two fluid layers of equal resting
depths. The flow is forced either by a differentially rotating lid, or by relaxation to
specified streamfunction or potential vorticity fields, or both. Dissipation is achieved
through Ekman layer pumping and suction at the horizontal boundaries, including the
internal interface. The effects of weak interfacial tension are included, as well as the
linear topographic beta-effect and the quadratic centripetal beta-effect. Stochastic
forcing may optionally be activated, to represent approximately the effects of random
unresolved features. A leapfrog time stepping scheme is used, with a Robert filter. Flows
simulated by the model agree well with those observed in the corresponding laboratory
experiments. |
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