Ocean Science
Ocean Science
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Articles | Volume 11, issue 3
Articles | Volume 11, issue 3
https://doi.org/10.5194/os-11-425-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/os-11-425-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 11, issue 3
Research article
 | 
04 Jun 2015
Research article |  | 04 Jun 2015

Assessment of an ensemble system that assimilates Jason-1/Envisat altimeter data in a probabilistic model of the North Atlantic ocean circulation

G. Candille, J.-M. Brankart, and P. Brasseur

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Short summary
A realistic ocean circulation model is adapted to explicitly simulate model uncertainties and an ensemble data assimilation -stochastic perturbations, altimetric data and 4-D observation operator- is developed in order to control the Gulf Stream dynamic. The performance of the ensemble system is measured through probabilistic approach; the update then adjusts the bias and the dispersion of the ensemble (reliability) and reduces the uncertainty by 30% (resolution) for the SSH variable.
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