Assimilation of drifter observations in primitive equation models of midlatitude ocean circulation

Tamay M Ozgokmen, Anne Molcard, Toshio M. Chin, Leonid I. Piterberg, Annalisa Griffa

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Motivated by increases in the realism of OGCMs and the number of drifting buoys in the ocean observing system, a new Lagrangian assimilation technique is implemented in an idealized, reduced-gravity configuration of the layered primitive equation model MICOM. Using an extensive set of twin experiments, the effectiveness of the Lagrangian observation operator and of a dynamical balancing technique for corrected model variables, which is based on geostrophy and mass conservation, are explored in comparison to a conventional Pseudo-Lagrangian observation operator and an implementation of the Kalman filter method. The results clearly illustrate that the Lagrangian observation operator is superior to the Pseudo-Lagrangian in the parameter range that is relevant for typical oceanic drifter observations, and that the simple dynamical balancing technique works well for midlatitude ocean circulation.

Original languageEnglish (US)
Pages (from-to)31
Number of pages1
JournalJournal of Geophysical Research C: Oceans
Volume108
Issue number7
StatePublished - Jul 15 2003

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primitive equations
drifter
temperate regions
assimilation
oceans
oceanic general circulation model
Buoys
Kalman filter
Kalman filters
Conservation
Gravitation
operators
gravity
buoys
ocean
microgravity
experiment
Experiments
conservation
ocean circulation

Keywords

  • Data assimilation
  • Drifter assimilation
  • Lagrangian data assimilation
  • Ocean modeling
  • Ocean prediction

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)
  • Atmospheric Science
  • Geochemistry and Petrology
  • Geophysics
  • Oceanography
  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Assimilation of drifter observations in primitive equation models of midlatitude ocean circulation. / Ozgokmen, Tamay M; Molcard, Anne; Chin, Toshio M.; Piterberg, Leonid I.; Griffa, Annalisa.

In: Journal of Geophysical Research C: Oceans, Vol. 108, No. 7, 15.07.2003, p. 31.

Research output: Contribution to journalArticle

Ozgokmen, Tamay M ; Molcard, Anne ; Chin, Toshio M. ; Piterberg, Leonid I. ; Griffa, Annalisa. / Assimilation of drifter observations in primitive equation models of midlatitude ocean circulation. In: Journal of Geophysical Research C: Oceans. 2003 ; Vol. 108, No. 7. pp. 31.
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