GETM has been validated with a number of observations from
idealised scenarios and different oceanic regimes. The corresponding
"test-cases" can be downloaded from this page. Test cases are available
from the table below. Installation instructions are provided here to guarantee a successful installation.
Download test cases for different versions of GETM on the Page "Download test cases" in the menu. To see additional
information about the test cases see "Read more..." and a movie of each simulation, click on the image.
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This test case contains a little box with
a parabolic bottom topography. It's lateral boundaries are lines of
constant latitude and longitude,respectively. The size of this box
corresponds approximately to that of the "nice_little_box" in Cartesian
coordinates. Stratificationfrom "tprof.dat" corresponds to a two-layer
fluid. The flow is driven by a constant wind from west.
It is created by Lars Umlauf to test horizontal coordinate systems in GETM.
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Last Updated ( Monday, 09 July 2007 )
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Read more...
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This test case contains a little rectangular box with a parabolic
bottom topography. Stratification from "tprof.dat" corresponds to a
two-layer fluid. The flow is driven by a constant wind from west or,
which is almost the same in this case, in the x-direction. The run's
duration is 10 days, during which you can see some nice Poincare-type
waves in the basin, some upwelling at the northern shore,and the
initiation of a non-linear Kelvin-type wave in the upwelling region.
It is created by Lars Umlauf to test horizontal coordinate systems in GETM.
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Last Updated ( Monday, 09 July 2007 )
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Read more...
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Box curvilinear test case |
This test case contains a little
curved channel with a parabolic bottom topography. Stratification from
"tprof.dat" corresponds toa two-layer fluid. The flow is driven by a
constant wind from west if "topo.nc" is used as bathymetry file.
Alternatively, if "topo_min.nc"is used, the wind blows into the local
x-direction of the curvilinear grid (see below).
It is created by Lars Umlauf to test horizontal coordinate systems in GETM.
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Last Updated ( Monday, 09 July 2007 )
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Read more...
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The Haidvogel test case is a so called lock exchange test
experiment. In this test case a 20m deep closed rectangular basin of
65km length with vertical walls, containing two fluids with a
density difference of 5kg/m³, is separated by a vertical interface in
the centre. The interface is removed at t=0. Due to the internal
pressure gradient, the dense water is behaving like a gravity
current moving below the lighter water (see animation). The simulation runs without Coriolis force (latitude=0°N, see getm.inp).
The
bathymetry is meant to be a two-dimensional slice.
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Last Updated ( Friday, 01 June 2007 )
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Read more...
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To demonstrate how GETM runs as a slice
model in x-direction, an upwelling test case with stable temperature
stratification in a parabolic (in x-direction) channel and a wind
stress of 0.2 N/m**2 in the channel direction (positive y-axis) is
given. After some hours, strong upwelling occurs at the left shore,
while there is downwelling a the right shore. See movie of simulation.
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Last Updated ( Friday, 01 June 2007 )
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Read more...
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Freshwater lense test case |
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Here, a lens of relative low salinity is placed on top of,ddenser
ambient water initially at rest. This test case has been suggested
by Tartinville et al. (1998) for the NOMADS concerted action within the
MAST-III programme of the European Communities.
In this project various numerical shelf sea models for the North Sea have been compared.
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Last Updated ( Friday, 01 June 2007 )
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Read more...
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This test case is called
interleaving, because it simulates the sandwiching (or interleaving) of
a dense bottom current into a stably stratified fluid. (see movie of simulation)
The
bathymetry is meant to be a two-dimensional slice (xz-plain, no
rotation) from the entrance area into the Baltic Sea,
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Last Updated ( Monday, 04 June 2007 )
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Read more...
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This test case originally was applied to show problems in numerical
schemes (advection, pressure gradient, time stepping,...) of ocean
models in a simulation of a channel flow over and around a tall
seamount (see movie of sea surface elevation).
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Last Updated ( Friday, 01 June 2007 )
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Read more...
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The Sylt test case provides a simulation with open boundary conditions
to the north and west prescribing the tidal signal for three periods
(see movie of simulation). Very nicely the ability of GETM simulating the tidal flats with drying and flooding can be seen. To see a movie of the simulation please mouse-click on the image below.
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Last Updated ( Monday, 09 July 2007 )
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Read more...
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The North Sea 6nm cartesian test case is the most complicated
case provided. The setup gives a fully baroclinic annual simulation + 3
month of spinup simulations with rivers, meteo-forcing, open
boundaries. Each
month will be simulated separately and 'hotstart'
files will be used.
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Last Updated ( Friday, 08 June 2007 )
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Read more...
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