EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

A new high-resolution zoom over the North-East Atlantic based on NEMO 4.2 (IMMERSE) version

Théo Brivoal, Jérome Chanut, and Mathieu Hamon
Théo Brivoal et al.
  • Mercator Ocean International, Toulouse, France (

In the context of the IMMERSE project, we present here a new high-resolution configuration over the North-East Atlantic based on the NEMO model in its version 4.2. The configuration is based on already existing eNEATL36 (extended North – East ATLantic) configuration, which covers the Iberian – Biscay – Ireland area and the western Mediterranean Sea at a 1/36° resolution. It incorporates a kilometric resolution (1/108°) AGRIF zoom that covers the Atlantic and Mediterranean French and Spanish coasts and includes the Gibraltar Strait, Corsica and Sardinia. Two-way exchanges are enabled between the nest and the parent configuration. We will present a description of the configuration, alongside some initial results. First, we compare the performance of the NEMO 4.2 version with the pre-IMMERSE version (NEMO 4.0) on our configuration. The configuration is then validated over the 1.5 year target period from January 2017 to June 2018 against satellite data and in-situ observations. Finally, the impact of the high-resolution nest is evaluated by comparing the simulation with a twin experiment over the same period but without nest.

How to cite: Brivoal, T., Chanut, J., and Hamon, M.: A new high-resolution zoom over the North-East Atlantic based on NEMO 4.2 (IMMERSE) version, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-2925,, 2022.


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