Advances in Geosciences www.adv-geosci.net 1680-7340 1680-7359 26 11th EGU Plinius Conference on Mediterranean Storms (2009) 2010 10.5194/adgeo-26-89-2010 http://www.adv-geosci.net/26/89/2010/ http://www.adv-geosci.net/26/89/2010/adgeo-26-89-2010.html http://www.adv-geosci.net/26/89/2010/adgeo-26-89-2010.pdf 89 92 2010-08-25 Trend analysis of the wave storminess: the wave direction M. Casas-Prat merce.casas@upc.edu J. P. Sierra Laboratori d'Enginyeria Marítima, UPC, Barcelona, Spain Centre Internacional d'Investigació dels Recursos Costaners, Barcelona, Spain In this paper changes in the wave pattern of the Catalan coast are analyzed in terms of wave storminess and wave direction based on series of 44 years of hindcast wave data. The analysis is performed employing two different techniques: one resulting from the combination of regression and bootstrapping and the other applying a Bayesian method. Although the trends are, in general, null, in some locations there are clear changes in the wave directional frequencies. These changes can significatively affect coastal hydrodynamics and morphodynamics. Agresti, A.: Categorical Data Analysis, Second Edition. Wiley, New York, USA, 734 pp., 2002. Egozcue, J.J., Pawlowsky-Glahn, V., Mateu-Figueras, G., and Barceló-Vidal, C.: Isometric logratio Transformations for Compositional Data Analysis, Math. Geol., 35(3), 279–300, 2003. Fisher, N. and Lee, A. J.: A correlation coefficient for circular data. Biometrica, 70, 327–332, 1983. Gomis, D., Ruiz, S., Sotillo, M. G., Álvarez-Fanjul, E., and Terradas, J.: Low frequency Mediterranean sea level variability: The contribution of atmospheric pressure and wind. Global and Planetary Change, 63, 215–229, 2008. Guedes Soares, C., Carretero Albiach, J. C., Weisse, R., and Alvarez-Fanjul, E.: A 40 years hindcast of wind, sea level and waves in European waters. Proceedings of the 21st International Conference on Offshore Mechanics and Arctic Engineering, Oslo, Norway, 669–675, 2002. Mendoza, E. T. and Jiménez, J. A.: Storm-Induced Beach Erosion on the Catalonian Coast, J. Coast. Res., Special Issue 48, 81–88, 2006. Mösso, C., Mestres, M., Sierra, J. P., Sánchez-Arcilla, A., and Goodess, C.: Waves and Surges in the Valencia Gulf. Variability Rather Than Climate Change, J. Coast. Res., Special Issue 56, 243–247, 2009. Musić, S. and Nicković, S.: 44-year wave hindcast for the Eastern Mediterranean, Coast. Eng., 55, 872–880, 2008. Ratsimandresy, A. W., Sotillo, M. G., Carretero Albiach, J. C., Álvarez Fanjul, E., and Haiji, H.: A 44-year high resolution ocean and atmospheric hindcast for the Mediterranean Basin developed within the HIPOCAS project, Coast. Eng., 55, 827–842, 2008.