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| Titel |
High resolution wind forcing effects on coastal circulation and eddy formation around a cape |
| VerfasserIn |
P. De Gaetano, A. Doglioli, M. Magaldi, D. Sacchetti, M. Corazza |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250019606
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| Zusammenfassung |
| The interplay between wind forcing and topographic features as headlands and capes has
been shown in various works about shallow water hydrodynamics. Changes in wind speed
and in the wind stress curl have been associated with the observed variability of the
instabilities around promontories. This numerical study is aimed to assess the role of wind
stress and bathymetry resolution on eddy formation and on the circulation around
capes.
The case study is the Promontorio of Portofino, a blunt prominent cape in the Eastern
Ligurian Sea. To obtain a realistic circulation, the Princeton Ocean Model (POM) is forced by
the output of the regional model SYMPHONIE simulating the Western Mediterranean
circulation from 2001 to 2003 at a spatial resolution of 3 km. Moreover, POM is run using
different bathymetry resolutions and surface conditions calculated from winds coming from
atmospheric models with different spatial resolutions. The models are BOLAM21, BOLAM7
and WINDS, which have horizontal resolution of Δx = 21 km, 7 km and 0.8 km,
respectively.
In order to assess if higher temporal resolution winds affect the results, the same
simulations are run using two different forcing frequencies, namely 3 and 24 hours. Finally,
the effects of different drag coefficient values in the bulk formula for the computation of the
wind stress, are also tested. |
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