Daily oceanographic analyses by the Mediterranean basin scale assimilation system

  • Dobricic S
  • Pinardi N
  • Adani M
  • et al.
ISSN: 1812-0822
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Abstract

This study presents the upgrade of the Optimal Interpolation scheme used in the basin scale assimilation scheme of the Mediterranean Forecasting System. The mod- ifications include a daily analysis cycle, the assimilation of ARGO float profiles, the implementation of the geostrophic balance in the background error covariance matrix and the initialisation of the analyses. A series of numerical experi- ments showed that each modification had a positive impact on the accuracy of the analyses: The daily cycle improved the representation of the processes with the temporal vari- ability shorter than a week, the assimilation of ARGO floats profiles significantly improved the salinity analyses quality, the geostrophically balanced background error covariances improved the accuracy of the surface elevation analyses, and the initialisation removed the barotropic adjustment in the forecast first time steps starting from the analysis.

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Dobricic, S., Pinardi, N., Adani, M., Tonani, M., Fratianni, C., Bonazzi, A., & Fernandez, V. (2006). Daily oceanographic analyses by the Mediterranean basin scale assimilation system. Ocean Science Discussions. Retrieved from http://www.ocean-sci.net/3/149/2007/os-3-149-2007.html

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