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 (Tracers in the Ocean Paradigm) models the {on,off}line oceanic tracers transport and biogeochemical processes

These physical core engines are described in their respective reference manuals that must be cited 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.

Project literature

Component Reference Manual DOI
NEMO-OCE NEMO ocean engine NEMO ocean engine DOI
NEMO-ICE NEMO Sea Ice engine not yet available
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 the 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.