About NEMO

NEMO standing for "Nucleus for European Modelling of the Ocean" is a state-of-the-art modelling framework for research activities and forecasting services in ocean and climate sciences, developed in a sustainable way by a European consortium.

NEMO is distributed under a GNU GPL compatible free licence


The NEMO ocean model has 3 major components:

  • NEMO-OCE models the ocean {thermo}dynamics and solves the primitive equations
  • NEMO-ICE (SI3: Sea-Ice Integrated Initiative ) models sea-ice {thermo}dynamics, brine inclusions and subgrid-scale thickness variations
  • NEMO-TOP-PISCES models the {on,off}line oceanic tracers transport and biogeochemical processes

These physical core engines are described in their respective reference manuals to cite for any work related to their use.

Additional capabilities

  • Create embedded zooms seamlessly thanks to 2-way nesting package AGRIF
  • Input-Output through effective XIOS software
  • Coupling interface to other Earth system components based on OASIS
  • Opportunity to integrate an external biogeochemistry model
  • Versatile data interface
  • Set of utilities is also provided to {pre,post}process your data

Reference Configurations and Test Cases

Several built-in configurations are provided to evaluate the skills and performances of the model. They can be used as as first easy set-up and as template for setting up a new configuration. Idealized test cases addressing specific physical processes are also available for download.


Component Reference Manual DOI
NEMO-OCE NEMO ocean engine NEMO ocean engine DOI
NEMO-ICE NEMO Sea Ice engine
NEMO-MBG NEMO Tracers engine NEMO Tracers engine DOI

Since 2014 the project has a Special Issue in the open-access journal Geoscientific Model Development (GMD) from the European Geosciences Union (EGU). The main scope is to collect relevant manuscripts covering various topics and to provide a single portal to assess the model potential and evolution. Used by a wide audience, numerous associated projects have been carried out and various publications are available.

Consortium bodies

The NEMO Consortium pulling together 5 European institutes plans NEMO sustainable development in order to keep a reliable evolving framework since 2008.

  • CMCC logo
  • CNRS logo
  • MOI logo
  • Met Office logo
  • NERC logo

It defines the multi-year development strategy that is implemented by the System Team on a yearly basis in order to regularly release a new version. When the need arises, Working Groups are created or resumed to gather the community expertise for advising on the development activities.