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| Titel |
The effect of coastal upwelling on the sea-breeze circulation at Cabo Frio, Brazil: a numerical experiment |
| VerfasserIn |
S. H. Franchito, V. B. Rao, J. L. Stech, J. A. Lorenzzetti |
| 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 ; 16, no. 7 ; Nr. 16, no. 7, S.866-871 |
| Datensatznummer |
250013347
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| Publikation (Nr.) |
 copernicus.org/angeo-16-866-1998.pdf |
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| Zusammenfassung |
The effect of coastal upwelling on sea-breeze
circulation in Cabo Frio (Brazil) and the feedback of sea-breeze on the
upwelling signal in this region are investigated. In order to study the effect
of coastal upwelling on sea-breeze a non-linear, three-dimensional, primitive
equation atmospheric model is employed. The model considers only dry air and
employs boundary layer formulation. The surface temperature is determined by a
forcing function applied to the Earth's surface. In order to investigate the
seasonal variations of the circulation, numerical experiments considering
three-month means are conducted: January-February-March (JFM), April-May-June
(AMJ), July-August-September (JAS) and October-November-December (OND). The
model results show that the sea-breeze is most intense near the coast at all the
seasons. The sea-breeze is stronger in OND and JFM, when the upwelling occurs,
and weaker in AMJ and JAS, when there is no upwelling. Numerical simulations
also show that when the upwelling occurs the sea-breeze develops and attains
maximum intensity earlier than when it does not occur. Observations show a
similar behavior. In order to verify the effect of the sea-breeze surface wind
on the upwelling, a two-layer finite element ocean model is also implemented.
The results of simulations using this model, forced by the wind generated in the
sea-breeze model, show that the sea-breeze effectively enhances the upwelling
signal.
Key words. Meteorology and atmospheric dynamics
(mesoscale meteorology; ocean-atmosphere interactions) · Oceanography
(numerical modeling) |
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