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AGU: Geophysical Research Letters

 

Keywords

  • data assimilation
  • pressure correction method
  • Lunenburg Bay

Index Terms

  • Oceanography: General: Ocean data assimilation and reanalysis
  • Oceanography: Physical: Hydrodynamic modeling
  • Oceanography: Physical: Currents

Abstract

GEOPHYSICAL RESEARCH LETTERS, VOL. 35, L24603, 5 PP., 2008
doi:10.1029/2008GL035640

Improve the utility of a coastal circulation model by assimilating hydrographic observations into the model momentum equation

Li Zhai

Department of Oceanography, Dalhousie University, Halifax, Nova Scotia, Canada

Jinyu Sheng

Department of Oceanography, Dalhousie University, Halifax, Nova Scotia, Canada

A numerical scheme is presented to assimilate hydrographic observations into the momentum equation of a limited-area coastal ocean circulation model. This new scheme has an advantage of assimilating observed hydrography into the model momentum equations and leaving the model temperature and salinity equations to be fully prognostic and is well suited for tracer studies. The performance of this new scheme is assessed using a nested-grid coastal circulation model developed for Lunenburg Bay of Nova Scotia, Canada. Model results demonstrate that this new scheme improves significantly the performance of the coastal circulation model in simulating the temperature and salinity distributions and circulation over coastal waters.

Received 8 August 2008; accepted 10 November 2008; published 23 December 2008.

Citation: Zhai, L., and J. Sheng (2008), Improve the utility of a coastal circulation model by assimilating hydrographic observations into the model momentum equation, Geophys. Res. Lett., 35, L24603, doi:10.1029/2008GL035640.

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