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 language | English (US) |
|---|---|
| Pages (from-to) | 31 |
| Number of pages | 1 |
| Journal | Journal of Geophysical Research C: Oceans |
| Volume | 108 |
| Issue number | 7 |
| State | Published - Jul 15 2003 |
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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 journal › Article
}
TY - JOUR
T1 - Assimilation of drifter observations in primitive equation models of midlatitude ocean circulation
AU - Ozgokmen, Tamay M
AU - Molcard, Anne
AU - Chin, Toshio M.
AU - Piterberg, Leonid I.
AU - Griffa, Annalisa
PY - 2003/7/15
Y1 - 2003/7/15
N2 - 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.
AB - 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.
KW - Data assimilation
KW - Drifter assimilation
KW - Lagrangian data assimilation
KW - Ocean modeling
KW - Ocean prediction
UR - http://www.scopus.com/inward/record.url?scp=0141994470&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0141994470&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0141994470
VL - 108
SP - 31
JO - Journal of Geophysical Research: Oceans
JF - Journal of Geophysical Research: Oceans
SN - 2169-9275
IS - 7
ER -