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Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
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Volume 8, issue 4 | Copyright

Special issue: Nucleus for European Modelling of the Ocean - NEMO

Geosci. Model Dev., 8, 1245-1257, 2015
https://doi.org/10.5194/gmd-8-1245-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Methods for assessment of models 29 Apr 2015

Methods for assessment of models | 29 Apr 2015

NEMOTAM: tangent and adjoint models for the ocean modelling platform NEMO

A. Vidard1, P.-A. Bouttier2, and F. Vigilant1 A. Vidard et al.
  • 1Inria, Université Grenoble Alpes, CNRS, LJK, 38000 Grenoble, France
  • 2Université Grenoble Alpes, CNRS, LGGE, 38000 Grenoble, France

Abstract. Tangent linear and adjoint models (TAMs) are efficient tools to analyse and to control dynamical systems such as NEMO. They can be involved in a large range of applications such as sensitivity analysis, parameter estimation or the computation of characteristic vectors. A TAM is also required by the 4D-Var algorithm, which is one of the major methods in data assimilation. This paper describes the development and the validation of the tangent linear and adjoint model for the NEMO ocean modelling platform (NEMOTAM). The diagnostic tools that are available alongside NEMOTAM are detailed and discussed, and several applications are also presented.

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This paper presents the tangent and adjoint models for the NEMO ocean modelling framework. They are useful tools for sensitivity and stability analysis. The implementation choices and the validation of the code is presented as well as a selection of applications.
This paper presents the tangent and adjoint models for the NEMO ocean modelling framework. They...
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