Download the mesh (135 MB)
Several resolutions of quasi-uniform and refined meshes are available for
download. Each mesh download provides an SCVT mesh on the unit sphere, the mesh
connectivity (graph.info) file for the mesh, and partitionings of the mesh
(e.g., graph.info.part.32) for various MPI task counts.
Additionally, for quasi-uniform meshes, "static" files using the default
datasets are available. The static file downloads provide single-precision
static files in
CDF-5/64-bit data format and mesh connectivity files.
MPAS-Atmosphere includes the capability to perform regional simulations. Regional meshes are formed as subsets of existing meshes. Currently, the MPAS-Limited-Area Python tool is the supported method for generating regional meshes as subsets of any of the meshes or static files available on this download page. Please refer to the documentation provided with MPAS-Limited-Area for details of its use.
Download the 480-km mesh (1.5 MB)
Download the 480-km static file (1.0 MB)
Download the 384-km mesh (2.4 MB)
Download the 384-km static file (2.3 MB)
Download the 240-km mesh (6.3 MB)
Download the 240-km static file (4.0 MB)
Download the 120-km mesh (25.7 MB)
Download the 120-km static file (16.2 MB)
Download the 60-km mesh (106 MB)
Download the 60-km static file (69.6 MB)
Download the 48-km mesh (182 MB)
Download the 48-km static file (174 MB)
Download the 30-km mesh (436 MB)
Download the 30-km static file (296 MB)
Download the 24-km mesh (685 MB)
Download the 24-km static file (525 MB)
Download the 15-km mesh (1659 MB)
Download the 15-km static file (1366 MB)
(Download link below following Important notes).
(Download link below following Important notes).
(Download link below following Important notes).
(Download link below following Important notes).
(Download link below following Important notes).
(Download link below following Important notes).
(Download link below following Important notes).
The 3-d fields that exist in the model at higher resolution can easily exceed the 4 GB limit imposed by the classic netCDF format. When creating atmospheric initial conditions (i.e., the "init.nc" file), and when writing output streams from the model with 3-d fields, it is necessary to use an "io_type" that supports large variables, such as "pnetcdf,cdf5" or "netcdf4". For more information on selecting the "io_type" of a stream, refer to Chapter 5 in the Users' Guide.
Note that when processing the GWDO static fields, each MPI task will need to allocate ~4 GB of additional memory to hold the global 30-arc-second terrain dataset. In many cases, under-subscribing batch nodes in order to avoid exceeding memory limits may be necessary.
Download the 12-km mesh (2713 MB)
Download the 12-km static file (2447 MB)
Download the 10-km mesh (3916 MB)
Download the 10-km static file (2947 MB)
Download the 7.5-km mesh (6936 MB)
Download the 7.5-km static file (6489 MB)
Download the 5-km mesh (15487 MB)
Download the 5-km static file (14508 MB)
Download the 4-km mesh (23721 MB)
Download the 4-km static file (21458 MB)
Download the 3.75-km mesh (27246 MB)
Download the 3.75-km static file (25242 MB)
Download the 3-km mesh (42007 MB)
Download the 3-km static file (38624 MB)
All variable-resolution meshes are supplied with a single refinement region that is centered on 0.0° latitude, 0.0° longitude. This region of refinement may be relocated to other locations on the sphere using the grid_rotate utility, whose usage is described in the MPAS-Atmosphere Users' Guide. The grid_rotate utility may be downloaded here.
This mesh contains 163842 horizontal grid cells, with the refinement
region spanning approximately 60 degrees of latitude/longitude.
Download the mesh (135 MB)
This mesh is like the 92-km – 25-km mesh, but with twice the horizontal resolution and 655362 horizontal grid cells.
Download the mesh (592 MB)
This mesh contains 535554 horizontal grid cells, with the refinement
region spanning approximately 55 degrees of latitude and 110 degrees of longitude.
Download the mesh (474 MB)
This mesh contains 999426 horizontal grid cells, with the refinement
region spanning approximately 80 degrees of latitude/longitude.
Download the mesh (913 MB)
This mesh contains 835586 horizontal grid cells, with the refinement
region spanning approximately 16 degrees of latitude/longitude.
Download the mesh (628 MB)
This mesh contains 1572866 horizontal grid cells, with the refinement
region spanning the tropics.
Download the mesh (1177 MB)
This mesh contains 6488066 horizontal grid cells, with the circular refinement
region spanning approximately 60 degrees of latitude/longitude. When using this mesh, there are several
crucial changes that must be made to pre-processing steps and to the model configuration:
(1) The 3-d fields that exist in the model at higher resolution can easily exceed the
4 GB limit imposed by the classic netCDF format. When creating atmospheric initial conditions (i.e., the "init.nc" file),
and when writing output streams from the model with 3-d fields, it is necessary to use an "io_type" that supports
large variables, such as "pnetcdf,cdf5" or "netcdf4". For more information on selecting the "io_type" of a stream,
refer to Chapter 5 in the Users' Guide.
(2) When processing the GWDO static fields, each MPI task will need to allocate ~4 GB of additional
memory to hold the global 30-arc-second terrain dataset. In many cases, under-subscribing batch nodes in order to avoid
exceeding memory limits may be necessary.
(3) When running the model itself with the 15-km – 3-km mesh, it is necessary to set config_apvm_upwinding = 0.0 in the nhyd_model namelist record.
Download the mesh (4560 MB)
This mesh contains x5.8060930 horizontal grid cells, with the elliptical refinement
region spanning approximately 60 degrees of latitude and 80 degrees of longitude. When using this mesh, there are several
crucial changes that must be made to pre-processing steps and to the model configuration:
(1) The 3-d fields that exist in the model at higher resolution can easily exceed the
4 GB limit imposed by the classic netCDF format. When creating atmospheric initial conditions (i.e., the "init.nc" file),
and when writing output streams from the model with 3-d fields, it is necessary to use an "io_type" that supports
large variables, such as "pnetcdf,cdf5" or "netcdf4". For more information on selecting the "io_type" of a stream,
refer to Chapter 5 in the Users' Guide.
(2) When processing the GWDO static fields, each MPI task will need to allocate ~4 GB of additional
memory to hold the global 30-arc-second terrain dataset. In many cases, under-subscribing batch nodes in order to avoid
exceeding memory limits may be necessary.
(3) When running the model itself with the 15-km – 3-km mesh, it is necessary to set config_apvm_upwinding = 0.0 in the nhyd_model namelist record.
Download the mesh (5963 MB)