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Altimetry Data Assimilation Into a Numerical Model of Ocean Dynamics in the South Atlantic

  • MARINE PHYSICS
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Oceanology Aims and scope

Abstract

The data assimilation (DA) of satellite observations of the ocean level from the Archiving Validating and Interpolating Satellite Observations (AVISO) into the IWM model (G.I. Marchuk Institute of Computational Mathematics) of the Russian Academy of Sciences is considered. An original DA method is used that generalizes the well-known Kalman algorithm, called by the authors the Generalized Kalman filter (GKF). Various fields of model characteristics are constructed and analyzed in the South Atlantic region, in particular, level fields, ocean surface temperature (OST) and current velocity fields on the surface. Their spatiotemporal variability is studied before and after the assimilation of observational data. The spatiotemporal variability of the model and observed level and temperature of the ocean surface in the South Atlantic is also compared. The similarities and differences of these fields are analyzed. The comparisons with other models confirm the adequateness of the ocean field simulation with the help of the DA method.

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Funding

This study was carried out under the state assignment of the Institute of Oceanology, Russian Academy of Sciences No. 0128-2021-0002 with the support of the Russian Foundation for Basic Research, grant No. 19-57-60 001 (model calculations). I. Ansorg’s work was supported by grant UID 118901 from the National Science Foundation of the Republic of South Africa.

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Authors and Affiliations

  1. Shirshov Institute of Oceanology, Russian Academy of Science, Moscow, Russia

    I. D. Deinego & K. P. Belyaev

  2. University of Cape Town, Department of Oceanography, Cape Town, South Africa

    I. Ansorge

  3. Dorodnitsyn Computer Center, Research Center of Automatic and Control, Russia Academy of Sciences, Moscow, Russia

    K. P. Belyaev

Authors
  1. I. D. Deinego
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  2. I. Ansorge
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  3. K. P. Belyaev
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Corresponding author

Correspondence to K. P. Belyaev.

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Translated by G. Karabyshev

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Deinego, I.D., Ansorge, I. & Belyaev, K.P. Altimetry Data Assimilation Into a Numerical Model of Ocean Dynamics in the South Atlantic. Oceanology 61, 613–624 (2021). https://doi.org/10.1134/S0001437021050039

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