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      Spectral bimodality of waves produced by hurricanes in the Caribbean coastal zone off Mexico Translated title: Bimodalidad espectral del oleaje provocado por huracanes en la zona costera del caribe mexicano


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          Abstract Wave data collected near the Caribbean coast of Mexico were used to study the frequency and directional structure of the wave field that was generated during the passing of 3 hurricanes. The data were recorded with 2 different acoustic wave gauges, which were installed at a depth of about 20 m. These records provided 183 directional wave spectra corresponding to the occurrence of hurricanes Wilma (October 2005), Dean (August 2007), and Rina (October 2011). The simultaneity of wind waves and swell was detected from different directions, due to the presence of bimodal spectra. For the 3 events, the relation between the translational speed of hurricanes and wave group celerity can explain the presence or absence of spectral bimodality, in either frequency or direction.

          Translated abstract

          Resumen Datos de oleaje recolectados próximos a la costa caribeña de México se utilizaron para estudiar la frecuencia y la estructura direccional del campo de oleaje que se generó como consecuencia del paso de 3 huracanes. Los datos se registraron con 2 equipos acústicos diferentes que miden oleaje, los cuales fueron instalados a una profundidad cercana a los 20 m. Estos registros permitieron obtener 183 espectros direccionales de oleaje, correspondientes a la ocurrencia de los huracanes Wilma (octubre de 2005), Dean (agosto de 2007) y Rina (octubre de 2011). Fue detectada la simultaneidad de oleaje local y remoto procedente de diferentes direcciones, debido a la presencia de espectros bimodales. Para los 3 eventos, se encontró que la relación entre la celeridad de traslación de los huracanes y la celeridad de grupo de los trenes de olas puede explicar la presencia o ausencia de bimodalidad espectral, ya sea en frecuencia o dirección.

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          Most cited references30

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          Global trends in tropical cyclone risk

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            The recent increase in Atlantic hurricane activity: causes and implications.

            The years 1995 to 2000 experienced the highest level of North Atlantic hurricane activity in the reliable record. Compared with the generally low activity of the previous 24 years (1971 to 1994), the past 6 years have seen a doubling of overall activity for the whole basin, a 2.5-fold increase in major hurricanes (>/=50 meters per second), and a fivefold increase in hurricanes affecting the Caribbean. The greater activity results from simultaneous increases in North Atlantic sea-surface temperatures and decreases in vertical wind shear. Because these changes exhibit a multidecadal time scale, the present high level of hurricane activity is likely to persist for an additional approximately 10 to 40 years. The shift in climate calls for a reevaluation of preparedness and mitigation strategies.
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              Directional spectra of hurricane wind waves

              I Young (2006)

                Author and article information

                Ciencias marinas
                Cienc. mar
                Universidad Autónoma de Baja California, Instituto de Investigaciones Oceanológicas (Ensenada, Baja California, Mexico )
                : 44
                : 1
                : 33-48
                [2] orgnameUniversidad Nacional Autónoma de México orgdiv1Instituto de Ingeniería Mexico
                [1] orgnameComisión Nacional para el Conocimiento y Uso de la Biodiversidad Mexico City
                [4] Puerto Morelos orgnameUniversidad Nacional Autónoma de México orgdiv1Unidad Académica de Sistemas Arrecifales orgdiv2Instituto de Ciencias del Mar y Limnología Mexico
                [3] Cádiz orgnameUniversidad de Cádiz orgdiv1Centro Andaluz Superior de Estudios Marinos Spain
                S0185-38802018000100033 S0185-3880(18)04400100033

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                : 01 September 2017
                : 01 January 2017
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 30, Pages: 16

                SciELO Mexico


                oleaje,espectro bimodal,huracán,Caribe,wave,spectral bimodality,hurricane,Caribbean


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