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| Titel |
Sensitivity of the Mediterranean sea level to atmospheric pressure and free surface elevation numerical formulation in NEMO |
| VerfasserIn |
P. Oddo, A. Bonaduce, N. Pinardi, A. Guarnieri |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1991-959X
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| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Model Development ; 7, no. 6 ; Nr. 7, no. 6 (2014-12-17), S.3001-3015 |
| Datensatznummer |
250115797
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| Publikation (Nr.) |
 copernicus.org/gmd-7-3001-2014.pdf |
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| Zusammenfassung |
| The sensitivity of the dynamics of the Mediterranean Sea to atmospheric
pressure and free surface elevation formulation using NEMO (Nucleus for
European Modelling of the Ocean) was evaluated. Four different experiments
were carried out in the Mediterranean Sea using filtered or explicit free
surface numerical schemes and accounting for the effect of atmospheric
pressure in addition to wind and buoyancy fluxes. Model results were
evaluated by coherency and power spectrum analysis with tide gauge data. We
found that atmospheric pressure plays an important role for periods shorter
than 100 days. The free surface formulation is important to obtain the
correct ocean response for periods shorter than 30 days. At frequencies
higher than 15 days−1 the Mediterranean basin's response to atmospheric
pressure was not coherent and the performance of the model strongly depended
on the specific area considered. A large-amplitude seasonal oscillation
observed in the experiments using a filtered free surface was not evident in
the corresponding explicit free surface formulation case, which was due to a
phase shift between mass fluxes in the Gibraltar Strait and at the surface.
The configuration with time splitting and atmospheric pressure always
performed best; the differences were enhanced at very high frequencies. |
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