MOM is a numerical ocean model based on the hydrostatic primitive equations. MOM development is led by scientists at NOAA/GFDL in collaboration with scientists worldwide. Version 5 of MOM (MOM5) is an open source project released under the GPL license.

The Model Development Lab

As a community driven open source research project, MOM uses online software development tools to ensure all development is as open and transparent as possible. The Model Development Lab is a collection of tools provided by Breakaway Labs to facilitate fast and efficient development.

Researchers and Engineers at the ARC CoE for Climate System Science, NCI Vizlab, NOAA/GFDL, Breakaway Labs, and CSIRO have released a beautiful visualisation of the Southern Ocean. The dataset was created using MOM5 in a 0.1 degree global configuration. This configuration will be released to the community as a standard MOM5 test case in due course.

Nic Hannah has written a new blog post about getting MOM5 test cases running on an Amazon Elastic Cloud Computing machine. This can be very useful for new users to get MOM5 running, it avoids the usual difficulties to do with configuring the environment on a new machine.

MOM traces its lineage back to the 1960s. During its 50+ year lifetime, there have been many versions of the code along with associated documentation. We have recently pulled together the various MOM Manuals, hoping that these documents offer some pedagogical value to those interested in ocean model fundamentals. MOM source codes going as far back as MOM1 has also be published on Github. Addtionally, a group of GFDL MOM developers have composed a historical introduction to MOM offering their perspectives on MOM's impact through the years on oceanography and climate science.

A Jenkins server running on NCI machines is now routinely compiling and running all available MOM 5 test cases. The build logs of these tests can be useful for comparison and debugging

Researchers at the ARC Centre for Excellence in Climate System Science including Paul Spence, Andy Hogg and Marshall Ward have released a 0.25 degree global configuration for MOM 5. The configuration is based on GFDL CM2.5. It has been added to the test case suite. A beautiful animation created using this configuration can be seen here.

As part of a collaboration between NCI and Fujitsu, MOM has been updated to run on Fujitsu's FX10 Supercomputers. This work will carry across to other SPARC-based platforms such as the K Computer. It give us the opportunity to run MOM under Fujitsu's highly scalable Tofu interconnect system.

MOM developers are pleased to announce the release of MOM 5.1.0. This version is very close to MOM 5.0.2, but with infrastructure updates to support more platforms; new and improved diagnostic capabilities; many bug fixes as reported through the MOM community; and a new ecosystem model known as COBALT.

As a general rule for updating code, please test the new code by comparing to your earlier results.

Happy modeling, Stephen Griffies for the MOM development team.

New Website Features

We've been making some improvements to the MOM website which we'd like to let you know about.

The first feature is namelist documentation.

This page contains documentations on all the fortran namelists used by MOM. It serves as a handy interface to the documentation already available within the source code. This page is automatically generated from the source code itself, so if you find any errors, or would like to make any improvements, this can be done by editing the code and submitting the changes to github.

The second feature is a data portal.

This portal provides download links to all the test case data used by MOM. This data is usually accessed by git-annex (which is still the preferred form of access). We have had a lot of feedback from people who havn't been able to use git-annex for various reasons, so this alternate download option will let you access the data as needed.

Both of these features should be considered as being in beta, so you might see some minor changes happening in the coming days. If you find any errors, broken links, etc, please let me know and I'll try to fix them up ASAP.

NOAA/GFDL scientists (Stock, Dunne, and John) have developed a new ecosystem model that can be coupled to MOM5 as well as other ocean circulation models. The ecosystem model, known as COBALT, is documented in this paper. Plans are underway to release COBALT in November 2013 as part of the public MOM5 code. Please stay tuned!

We are pleased to announce that the MOM 5 Model Development Lab (this very website) is being relaunched today. Featuring a a cleaner interface and a more powerful underlying framework, the new system will allow the MOM community to continue to grow and thrive.

One exciting development is a revamp of the front page which will now contain regular news updates. If you have recently published any kind of research using MOM then we'd love to hear from you. Leave a message on mailing list and we'll arrange to have your reserach feature front and center on this page.

nOver the coming months we anticipate a number of announcements, including the release of MOM 5.1. As always, we welcome contributions from all users in the forms of code contributions, bug reports or news articles.