Wind wave climate change: Impacts on the littoral processes at the Northern Buenos Aires Province Coast, Argentina
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Wind wave climate change: Impacts on the littoral processes at the Northern Buenos Aires Province Coast, Argentina Walter C. Dragani & Paula B. Martin & Guadalupe Alonso & Jorge O. Codignotto & Bárbara E. Prario & Guido Bacino
Received: 30 April 2013 / Accepted: 2 September 2013 / Published online: 19 September 2013 # Springer Science+Business Media Dordrecht 2013
Abstract Several works reported wind-wave climate changes at Buenos Aires Province continental shelf. The aim of this work is to investigate the impact of these changes in the coastal processes of the region. This study is carried out by means of visual wave parameters gathered at the surf zone of Pinamar and by a conveniently implemented and validated numerical wave model (SWAN). Numerical results corresponding to a grid point located 30 km off Pinamar show a significant increase of wave heights from the S and SSE directions and in the frequency of occurrence of waves coming from the S, SSE and E. It is shown that these slight offshore appreciated trends would not have significant effects on the breaker heights observed at the surf zone at Pinamar. On the contrary, the slight positive trend observed offshore in the frequency of occurrence could be affecting the incidence of waves onshore, producing an increase in the number of cases of normal incidence at the surf zone and, consequently, a significant decrease in the alongshore wave energy flux assessed W. C. Dragani : P. B. Martin : G. Alonso : B. E. Prario Servicio de Hidrografía Naval y ESCM-INUN, Av. Montes de Oca 2124 (C1270ABV), Ciudad Autónoma de Buenos Aires, Argentina W. C. Dragani : P. B. Martin : G. Alonso : J. O. Codignotto : G. Bacino CONICET, Consejo Nacional de Investigaciones Científicas y Técnicas, Av. Rivadavia 1917. (C1033AAJ), Ciudad Autónoma de Buenos Aires, Argentina W. C. Dragani : P. B. Martin : G. Alonso Departamento de Ciencias de la Atmósfera y los Océanos, Facultad de Ciencias Exactas y Naturales, UBA, Ciudad Universitaria, Pabellón II, 2do. Piso. (C1428EGA), Ciudad Autónoma de Buenos Aires, Argentina W. C. Dragani (*) Instituto Franco - Argentino para el Estudio del Clima y sus Impactos (UMI IFAECI/CNRS - CONICET-UBA), Ciudad Universitaria, Pabellón II, 2do. Piso. (C1428EGA), Ciudad Autónoma de Buenos Aires, Argentina e-mail: [email protected] J. O. Codignotto : G. Bacino Servicio Geológico Minero Argentino (SEGEMAR), Av. Julio A. Roca 651 10º P (C1067ABB), Ciudad Autónoma de Buenos Aires, Argentina
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Climatic Change (2013) 121:649–660
at Pinamar. This reduction in the alongshore wave energy flux could be responsible for some coastal changes detected in the region as, for instance, the remarkable shortening of Punta Rasa spit located 70 km northward Pinamar. 1 Introduction The IPCC (Intergovernmental Panel on Climate Change) Working Group (WG) II stated that the analysis of risks to coastal population and ecosystems requires the inclusion of a broader range of coastal drivers of change. One of those drivers, which have received little attention to this date, is the c
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