global_convergence test group
implements convergence studies on the full globe. Currently, the only test case
is the advection of a cosine bell.
The global convergence test cases support two types of meshes:
created with the
icos meshes created with
compass.mesh.IcosahedralMeshStep. In general, the
are more uniform but the
qu meshes are more flexible. The
only support a fixed set of resolutions described in
test performs a series of 24-day runs that advect a bell-shaped tracer blob
around the sphere. The resolution of the sphere varies (by default, between
60 and 240 km). Advected results are compared with a known exact solution to
determine the rate of convergence. See cosine_bell.
for config options and more details on the test case.
This step builds a global mesh with uniform resolution. The type of mesh
depends on the mesh type (
defines a step for setting up the initial state for each test case with a
tracer distributed in a cosine-bell shape.
defines a step for running MPAS-Ocean from the initial condition produced in
initial_state step. The time step is determined from the resolution
based on the
dt_per_km config option. Other namelist options are taken
from the test case’s
defines a step for computing the RMSE (root-mean-squared error) for the results
at each resolution and plotting them in