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| Titel |
Assessment of the impact of TS assimilation from ARGO floats in the Mediterranean Sea |
| VerfasserIn |
A. Griffa, A. Molcard, F. Raicich, V. Rupolo |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1812-0784
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| Digitales Dokument |
URL |
| Erschienen |
In: Ocean Science ; 2, no. 2 ; Nr. 2, no. 2 (2006-12-05), S.237-248 |
| Datensatznummer |
250000518
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| Publikation (Nr.) |
 copernicus.org/os-2-237-2006.pdf |
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| Zusammenfassung |
| In this paper, the impact of assimilating Temperature (T) and Salinity (S)
profiles from Argo floats in the Mediterranean Sea is quantitatively
investigated using the Observing System Simulation Experiments (OSSE)
approach. The impact of varying the number of floats and their launch
positions is considered, using numerical simulations with a MOM model and a
reduced-order multivariate Optimal Interpolation scheme (SOFA) for
assimilation. Realistic float coverage and launch positions used during the
first MFSTEP phase are considered, as well as "ideal" density coverage
that can be envisioned for the future, corresponding to a double coverage
with respect to MFSTEP and with floats released along the VOS tracks. The
most effective float trajectories are identified, showing that frontal
regions play a major role, and that it is crucial to maintain a sufficient
coverage of them. In addition to this, a comparison is also performed
between the results obtained from MEDARGO floats in ideal conditions and
results from "ideal" profiles taken at fixed points along the VOS tracks,
as for the XBT data. For consistency the coverage considered is double the
actual XBT coverage during MFSTEP, resulting in a threefold increase in the
number of profiles compared to the MEDARGO experiment. The maximum error
reduction is of approximately 10%, suggesting that spatially coarser
profiles from floats can be more efficient since they follow flow features. |
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