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The Modular Ocean Model (MOM) is the canonical ocean climate model use by many researchers around the world. The model’s origins date back to the community code first developed by Kirk Bryan and Mike Cox in the 1960's-1980's, and to which many other ocean climate models can trace their origins. Ron Pacanowski, Keith Dixon and Tony Rosati fundamentally reworked these older codes into a much more modern format in the early 1990’s, and Steve Griffies has led the continued development of MOM since 2000. However, MOM is truly a community code, and many people, both inside GFDL and around the world, have contributed fundamentally to its successful development over the years.

  • MOM5.0 was released in 2012, and extends the capabilities of MOM4.1 with a novel "Lagrangian-blobs" treatment of overflows, and a prototype C-grid discretization.
  • MOM4.1 was most recently released in December 2009 (click here for the MOM4.1 manual: ~7Mb).  This code allows for the following added functionality relative to MOM4.0:
    1. the inclusion of non-Boussinesq effects (relevant for studying sea-level)
    2. alternative vertical coordinates such as p* and z*.
We highlight also the release of the CM2.1 climate model as a test case with the December 2009 version of MOM4p1.
  • MOM4.0 presents an extensive update in parameterizations and streamlined capabilities relative to MOM3. There were four sub-releases of this code during the period Jan2004 until May2005.  Click here for the MOM4.0 manual (~2Mb).
  • MOM3 is a z-coordinate model released in 1999. It is no longer supported by GFDL, though the MOM3 manual can be downloaded here(~5Mb).
  • MOM2.2 was released in 1996. It is no longer supported by GFDL, though the MOM2 manual can be downloaded here (~2Mb).