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Abstract:

The aim of the present work is to give a quantitative assessment of the change in mean wave parameters in the upper Río de la Plata (RDP) by considering a possible change in local winds. A statistical analysis of the sea and swell in the outer RDP, as well as the computation and analysis of their propagation and transformation throughout the intermediate and upper regions, reveal that refraction, shoaling and friction effects diminish wave heights by 94.9%. Consequently, the predominant wave climate in the upper RDP could only be described considering wind waves generated locally (sea). The present wave climate (directional wave heights and periods) in the upper RDP is estimated by the hindcasting methodology based on 10-year statistics of winds measured at 'Aeroparque Jorge Newery' meteorological station. A possible future scenario is sketched for which wind frequencies and intensities for the easterly directions are respectively 30% and 10% higher than the present values. The results for the upper RDP show that mean easterly wave heights will increase by 0.12 m (13%) relative to present values (0.90 m) and their frequencies will increase by 30% (from 18.4 to 23.9%), producing larger total heights. Therefore, the coast of Buenos Aires city will be more frequently exposed to wave effects, giving rise to intensified associated littoral processes. The mean period for easterly waves will not change significantly (less than 4%, from 5.3 to 5.5 s). The results obtained are a first approximation to the problem, suggesting that within the upper RDP the wave climate is very sensitive to the predicted change in the wind field. © 2004 Royal Meteorological Society.

Registro:

Documento: Artículo
Título:Impact of a possible local wind change on the wave climate in the upper Río de la Plata
Autor:Dragani, W.C.; Romero, S.I.
Filiación:Departamento Oceanografía, Servicio de Hidrografía Naval, ESCM-INUN, Av. Montes de Oca 2124, Buenos Aires, Argentina
Depto. Ciencias Atmosfera/Oceanos, Fac. de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón II. 2do. piso, Buenos Aires, Argentina
CONICET, Consejo Nac. Invest. Cientificas/Tec, Rivaduvia 1917, Buenos Aires, Argentina
Palabras clave:Río de la Plata; Wave climate; Wave height trend; Wave hindcasting; Wind change; Approximation theory; Climatology; Refraction; Statistical methods; Wave climate; Wave heights; Wind; littoral environment; sea breeze; wave height; wind forcing; wind wave; wind-wave interaction; Rio de la Plata; South America
Año:2004
Volumen:24
Número:9
Página de inicio:1149
Página de fin:1157
DOI: http://dx.doi.org/10.1002/joc.1049
Título revista:International Journal of Climatology
Título revista abreviado:Int. J. Climatol.
ISSN:08998418
CODEN:IJCLE
PDF:https://bibliotecadigital.exactas.uba.ar/download/paper/paper_08998418_v24_n9_p1149_Dragani.pdf
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08998418_v24_n9_p1149_Dragani

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Citas:

---------- APA ----------
Dragani, W.C. & Romero, S.I. (2004) . Impact of a possible local wind change on the wave climate in the upper Río de la Plata. International Journal of Climatology, 24(9), 1149-1157.
http://dx.doi.org/10.1002/joc.1049
---------- CHICAGO ----------
Dragani, W.C., Romero, S.I. "Impact of a possible local wind change on the wave climate in the upper Río de la Plata" . International Journal of Climatology 24, no. 9 (2004) : 1149-1157.
http://dx.doi.org/10.1002/joc.1049
---------- MLA ----------
Dragani, W.C., Romero, S.I. "Impact of a possible local wind change on the wave climate in the upper Río de la Plata" . International Journal of Climatology, vol. 24, no. 9, 2004, pp. 1149-1157.
http://dx.doi.org/10.1002/joc.1049
---------- VANCOUVER ----------
Dragani, W.C., Romero, S.I. Impact of a possible local wind change on the wave climate in the upper Río de la Plata. Int. J. Climatol. 2004;24(9):1149-1157.
http://dx.doi.org/10.1002/joc.1049