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The SANGOMA Tools for Data Assimilation

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The SANGOMA Tools for Data Assimilation

LARSNERGER1, UMERALTAF2, ALEXANDERBARTH3, LAURENTBERTINO4, JEAN-MICHEL

BRANKART5, PIERREBRASSEUR5, GUILLEMCANDILLE5, PIERREDEMEY6, ALISON

FOWLER7, PAULKIRCHGESSNER1, PETERJAN VANLEEUWEN7, NILS VANVELZEN2, MARTIN

VERLAAN2, SANITAVETRA-CARVALHO7, JEAN-MARIEBECKERS3

1Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany 2TU Delft, Delft, Netherlands

3University of Li`ege, Li`ege, Belguim

4Nansen Environmental and Remote Sensing Center, Bergen, Norway 5CNRS/LGGE, Grenoble, France

6CNRS/LEGOS, Toulouse, France

7Department of Meteorology, University of Reading, UK

The EU-funded project SANGOMA – Stochastic Assimilation of the Next Gener-ation Ocean Model ApplicGener-ations –provides new developments in data assimilGener-ation to ensure that future operational systems can make use of state-of-the-art data-assimilation methods and related analysis tools. One task of SANGOMA is to develop a collection of common tools for data assimilation with a uniform interface so that the tools are usable from dif-ferent data assimilation systems. The tool developments mainly aim at tools that support ensemble-based data assimilation applications like for the generation of perturbations, to perform transformations, to compute diagnostics, as well as further utilities. In addition, a selection of ensemble filter analysis steps is included. The tools are implemented in Fortran and as scripts for Matlab or Octave. They are provided as free open-source programs via the project web site [http://www.data-assimilation.net]. This contribution provides an overview of the tools that are available in the latest release V1 of the SANGOMA tools as well as the plans for the next release.

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