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| Titel |
Currents and upwelling along the Latium coasts in the Central Tyrrhenian Sea (western Mediterranean) |
| VerfasserIn |
V. Rossi, E. Salusti |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 13, no. 4 ; Nr. 13, no. 4, S.437-449 |
| Datensatznummer |
250011824
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| Publikation (Nr.) |
 copernicus.org/angeo-13-437-1995.pdf |
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| Zusammenfassung |
| In this study, springtime coastal currents
along the Latium coast and their relation to external forcings, mainly wind
stress curl and atmospheric pressure, are analysed. As a main result, we find
that hydrographical measurements reveal currents parallel to the bottom
isobaths, but with isopycnal sloping upwards towards the coast, suggesting the
importance of upwellings in determining the coastal currents. This is confirmed
by thermal satellite data showing the presence of a ~10-km-wide patch of cold
water east of Mount Argentario, i.e. a cyclonic vortex. The current meter
data give rather small values of the time-averaged alongshore velocities (~2 cm
s–1 for most current meters and ~3 cm s–1 for the current
meter placed immediately off the Argentario) and also smaller values for the
offshore velocities. The correlation between these two types of currents is
rather poor; this is also due to the variability characteristic of a
wind-induced upwelling. Finally, we obtain a value of 0.74 for the correlation
between the alongshore current (first mode of Empirical Orthogonal Functions
decomposition) and the wind stress if a 23-h time lag is assumed. |
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