Tags · jonbob/MPAS-Model

v6.1

MPAS Version 6.1

This minor release completes biogeochemistry functionality in the sea ice core.

May 11, 2018
c970b61
zip
tar.gz

v6.0

MPAS Version 6.0

This major release of MPAS introduces the MPAS-Seaice core, and it includes new
functionality, general improvements, and fixes to the Ocean, Land Ice, and
Atmosphere cores. Also included are various small improvements, optimizations,
and clean-up in the shared software infrastructure. Specific changes to each of
the MPAS components are detailed below.

Framework:

* Introduction of a new module for logging messages during model execution.
  Unless any errors are encountered, MPAS cores now write a single log file,
  named `log.<core>.0000.out`. In case errors occur, each MPI task will write
  its own error log file named `log.<core>.<task ID>.err`.
* Performance enhancements to aggregated halo exchanges used in the Ocean,
  Land-ice, and Sea-ice cores.
* Minor enhancements to the MPAS "stream manager", including the ability to
  specify "final_only" for the "input_interval" or "output_interval" of a stream
  to read/write that stream only at the model stop time.
* Various bug-fixes and other clean-up to ensure that the framework can be used
  in coupled-model configurations involving more than one MPAS core.

Atmosphere:

Relative to the v5.0 release, the MPAS v6.0 release represents a minor
increment in capability for the MPAS-Atmosphere core. MPAS-Atmosphere v6.0
includes:
* An increase of the default number of layers from 41 to 55 to match
  the standard experimental set-up used at NCAR.
* The addition of support for the use of GMTED2010 terrain elevation,
  matching the default terrain dataset used in the WRF model.
    - Set `config_topo_data = 'GMTED2010'` in the namelist.init_atmosphere file
      when interpolating static fields.
* Computation of the GWDO sub-grid-scale orography fields in a way that is more
  consistent with the pre-computed fields used in the WRF model.
* Support for parallel builds of the `init_atmosphere` and `atmosphere` cores.
    - Use `make -j N ...`.
* A significant reduction in the size of model initial conditions files.

Land Ice:

The last MPAS release with land ice improvements was v3.0. MPAS v6.0 adds the
following significant features relative to v3.0:
* Adds support for the First-Order velocity solver through the external Albany
  library.
* Adds a thermal solver that can be solved in terms of temperature (verified)
  or enthalpy (experimental).
* Adds subglacial hydrology model.
* Adds a number of calving options including eigencalving.
* Adds an adaptive time stepper.
* Adds analysis members for global and regional statistics.
* Ability to couple with E3SM.
* Adds a number of test cases and model configurations.
* General cleanup and bug fixes.

Ocean:

* Ability to couple with E3SM.
* New in-situ analysis computations.
* Division of tracers into groups to control output, algorithms, and forcing.
* Addition of biogeochemistry tracers and column computations.

Sea Ice:

* First release of MPAS-Seaice.
* MPAS-Seaice solves the sea-ice momentum equation with an
  Elastic-Viscous-Plastic rheology and variational horizontal operators adapted
  for the MPAS mesh.
* Horizontal transport of mass and tracers uses an incremental remapping scheme.
* Column physics and biogeochemistry uses an early version of the Icepack
  library.