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The ACCESS Ocean Model (ACCESS-OM) is a global coupled ocean model that includes ocean, ocean biogeochemistry, and sea ice components, linked together by a coupler.
The atmospheric fields that drive the model are provided by a data source, usually derived from reanalysis.


ACCESS-OM2 1 is a suite of coupled ocean-sea ice models originally developed by the Consortium for Ocean-Sea Ice Modelling in Australia (COSIMA).

ACCESS-NRI has released ACCESS-OM2 configurations as an adaptation of those originally developed by COSIMA.

There are global configurations for three spatial resolutions:

  • 1° horizontal resolution, 50 vertical levels.
  • 0.25° horizontal resolution, 50 vertical levels.
  • 0.1° horizontal resolution, 75 vertical levels.

For each resolution there are two options of atmospheric forcing:

  • Repeat Year Forcing (RYF)
  • Interannual Forcing (IAF)

Each configuration also has a biogeochemical (BGC) configuration that uses the Biogeochemistry Ocean component, if this is required.


BGC experiments are slower and generally consume more resources (compute time and disk space).

Model Components

  • Ocean: MOM5.
    Tripolar grid, 1° spatial resolution, 50 vertical levels.
  • Ocean: MOM5.
    Tripolar grid, 0.25° spatial resolution, 50 vertical levels.
  • Ocean: MOM5.
    Tripolar grid, 0.1° spatial resolution, 75 vertical levels.
  • Ocean Biogeochemistry: WOMBAT.
  • Sea ice: CICE5.1.2.
    Same grid as ocean.
  • Coupler: OASIS3-MCT.


  1. A. E. Kiss, A. McC. Hogg, N. Hannah, F. Boeira Dias, G. B. Brassington, M. A. Chamberlain, C. Chapman, P. Dobrohotoff, C. M. Domingues, E. R. Duran, M. H. England, R. Fiedler, S. M. Griffies, A. Heerdegen, P. Heil, R. M. Holmes, A. Klocker, S. J. Marsland, A. K. Morrison, J. Munroe, M. Nikurashin, P. R. Oke, G. S. Pilo, O. Richet, A. Savita, P. Spence, K. D. Stewart, M. L. Ward, F. Wu, and X. Zhang. ACCESS-OM2 v1.0: a global ocean–sea ice model at three resolutions. Geoscientific Model Development, 13(2):401–442, 2020. URL:, doi:10.5194/gmd-13-401-2020

Last update: May 19, 2024