Analysis of fetch-limited wave growth using high-frequency radars in the Gulf of Tehuantepec
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Redalyc · Ciencias Marinas
Fetch-limited wave growth was analyzed using high spatial and temporal resolution measurements obtained with high-frequency (HF) radars. To calculate the wave spectrum, the second-order echo (S2N) was extracted from the Doppler spectrum and mapped to the wave frequency domain. The conversion of S2N...
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| Pubblicato in: | Ciencias Marinas |
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| Natura: | Artículo científico |
| Lingua: | en |
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Universidad Autónoma de Baja California
2014
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| _version_ | 1878325300099547136 |
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| author | Vladimir G. Toro |
| author_facet | Vladimir G. Toro |
| collection | Ciencias Marinas |
| container_title | Ciencias Marinas |
| contents | Analysis of fetch-limited wave growth using high-frequency radars in the Gulf of Tehuantepec Vladimir G. Toro Francisco J. Ocampo-Torres Pedro Osuna Héctor García-Nava Xavier Flores-Vidal Reginaldo Durazo Ciencias de la Tierra high fetch swell ASIS buoy frequency ra dars Fetch-limited wave grow th was analyzed using high spatial and temporal resolution measurements obt ained with high-frequency (HF) radars. To calculate the wave spectrum, the second-order echo ( S 2 N ) was extracted from the Doppler spectrum and mapped to the wave frequency domain. The conversion of S 2 N to the wave frequency spectrum was carried out us ing a linear parametric model dependent on wind speed. Wave growth, represented by the dime nsionless energy and peak frequency as a f unction of dimensionles s fetch, was determ ined from the spectra calculated for 25 cells (~400 km 2 ) in the vicinity of a moored Air–Sea Interacti on Spar buoy. The buoy data were used as reference and to provide the wind informa tion required for the wave growth analysis. The simultaneous data from the buoy and HF radars sh owed a suitable agreement with the wave growth curves. The analysis of the 25 cells showed an adequate agreement and certain dispersio n around the growth curves. Possible causes of this disp ersion are related to errors in the est imation of the frequency spectrum and fetch, and the assumption of homogeneous wind conditions. Fr om the limited data set used, it was not possible to prove any impact of swell on wave growth ; however, it is possible that analysis over a wider range of swell heights may provide this evidence. Neverthe less, the results suggest that the linear parametric model is able to re produce fetch-limited wave growth. This work represents th e first effort focu sed on fetch-limited wave growth using HF radars. 2014 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48031366003 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.2 Vol.40 |
| ctrlnum | oai:cienciasmarinas.com.mx:article/2403 10.7773/cm.v40i2.2403 |
| description | Fetch-limited wave growth was analyzed using high spatial and temporal resolution measurements obtained with high-frequency (HF) radars. To calculate the wave spectrum, the second-order echo (S2N) was extracted from the Doppler spectrum and mapped to the wave frequency domain. The conversion of S2N to the wave frequency spectrum was carried out using a linear parametric model dependent on wind speed. Wave growth, represented by the dimensionless energy and peak frequency as a function of dimensionless fetch, was determined from the spectra calculated for 25 cells (~400 km2) in the vicinity of a moored Air–Sea Interaction Spar buoy. The buoy data were used as reference and to provide the wind information required for the wave growth analysis. The simultaneous data from the buoy and HF radars showed a suitable agreement with the wave growth curves. The analysis of the 25 cells showed an adequate agreement and certain dispersion around the growth curves. Possible causes of this dispersion are related to errors in the estimation of the frequency spectrum and fetch, and the assumption of homogeneous wind conditions. From the limited data set used, it was not possible to prove any impact of swell on wave growth; however, it is possible that analysis over a wider range of swell heights may provide this evidence. Nevertheless, the results suggest that the linear parametric model is able to reproduce fetch-limited wave growth. This work represents the first effort focused on fetch-limited wave growth using HF radars.
Se analizó el crecimiento del oleaje limitado por el fetch utilizando mediciones de alta resolución espaciotemporal obtenidas con radares de alta frecuencia (HF). Para calcular el espectro del oleaje, el eco de segundo orden (S2N) fue extraído del espectro Doppler y mapeado al dominio de las frecuencias del oleaje. La conversión de S2N al espectro del oleaje se realizó mediante un modelo paramétrico lineal que depende de la velocidad del viento. El crecimiento del oleaje local, representado por la energía y la frecuencia asociada al pico espectral adimensional en función del fetch adimensional, se determinó a partir de los espectros del oleaje calculados para 25 nodos (~400 km2) alrededor del sitio de anclaje de una boya Air–Sea Interaction Spar. Los datos de la boya se utilizaron como referencia y para proveer la información del viento necesaria para el análisis del crecimiento del oleaje. Los datos simultáneos de la boya y los radares HF presentaron una concordancia adecuada con las curvas de crecimiento del oleaje. El análisis en el dominio de los 25 nodos mostró una correlación significativa y cierta dispersión alrededor de las curvas de crecimiento. Las causas probables de esta dispersión están asociadas con errores en el cálculo del espectro del oleaje y del fetch, y a la suposición de condiciones de viento homogéneo. No fue posible determinar la influencia del swell en el crecimiento del oleaje con el set limitado de datos utilizado; sin embargo, es posible que un análisis con mayor variación de la altura del swell podría proveer esta evidencia. No obstante, los resultados sugieren que, con el modelo paramétrico lineal, es posible reproducir el crecimiento del oleaje limitado por el fetch. Este trabajo representa el primer esfuerzo enfocado al análisis del crecimiento del oleaje utilizando mediciones de radares HF. |
| format | Artículo científico |
| id | redalyc_48031366003 |
| institution | Redalyc Ciencias Marinas |
| language | en |
| publishDate | 2014 |
| publisher | Universidad Autónoma de Baja California |
| spelling | Analysis of fetch-limited wave growth using high-frequency radars in the Gulf of Tehuantepec Análisis del crecimiento del oleaje limitado por el fetch usando radares dealta frecuencia en el golfo de Tehuantepec Toro, Vladimir G Ocampo-Torres, Francisco J Osuna, Pedro García-Nava, Héctor Flores-Vidal, Xavier Durazo, Reginaldo Fetch-limited wave growth was analyzed using high spatial and temporal resolution measurements obtained with high-frequency (HF) radars. To calculate the wave spectrum, the second-order echo (S2N) was extracted from the Doppler spectrum and mapped to the wave frequency domain. The conversion of S2N to the wave frequency spectrum was carried out using a linear parametric model dependent on wind speed. Wave growth, represented by the dimensionless energy and peak frequency as a function of dimensionless fetch, was determined from the spectra calculated for 25 cells (~400 km2) in the vicinity of a moored Air–Sea Interaction Spar buoy. The buoy data were used as reference and to provide the wind information required for the wave growth analysis. The simultaneous data from the buoy and HF radars showed a suitable agreement with the wave growth curves. The analysis of the 25 cells showed an adequate agreement and certain dispersion around the growth curves. Possible causes of this dispersion are related to errors in the estimation of the frequency spectrum and fetch, and the assumption of homogeneous wind conditions. From the limited data set used, it was not possible to prove any impact of swell on wave growth; however, it is possible that analysis over a wider range of swell heights may provide this evidence. Nevertheless, the results suggest that the linear parametric model is able to reproduce fetch-limited wave growth. This work represents the first effort focused on fetch-limited wave growth using HF radars. Se analizó el crecimiento del oleaje limitado por el fetch utilizando mediciones de alta resolución espaciotemporal obtenidas con radares de alta frecuencia (HF). Para calcular el espectro del oleaje, el eco de segundo orden (S2N) fue extraído del espectro Doppler y mapeado al dominio de las frecuencias del oleaje. La conversión de S2N al espectro del oleaje se realizó mediante un modelo paramétrico lineal que depende de la velocidad del viento. El crecimiento del oleaje local, representado por la energía y la frecuencia asociada al pico espectral adimensional en función del fetch adimensional, se determinó a partir de los espectros del oleaje calculados para 25 nodos (~400 km2) alrededor del sitio de anclaje de una boya Air–Sea Interaction Spar. Los datos de la boya se utilizaron como referencia y para proveer la información del viento necesaria para el análisis del crecimiento del oleaje. Los datos simultáneos de la boya y los radares HF presentaron una concordancia adecuada con las curvas de crecimiento del oleaje. El análisis en el dominio de los 25 nodos mostró una correlación significativa y cierta dispersión alrededor de las curvas de crecimiento. Las causas probables de esta dispersión están asociadas con errores en el cálculo del espectro del oleaje y del fetch, y a la suposición de condiciones de viento homogéneo. No fue posible determinar la influencia del swell en el crecimiento del oleaje con el set limitado de datos utilizado; sin embargo, es posible que un análisis con mayor variación de la altura del swell podría proveer esta evidencia. No obstante, los resultados sugieren que, con el modelo paramétrico lineal, es posible reproducir el crecimiento del oleaje limitado por el fetch. Este trabajo representa el primer esfuerzo enfocado al análisis del crecimiento del oleaje utilizando mediciones de radares HF. Universidad Autónoma de Baja California, Instituto de Investigaciones Oceanológicas 2014-06-19 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://cienciasmarinas.com.mx/index.php/cmarinas/article/view/2403 10.7773/cm.v40i2.2403 Ciencias Marinas; Vol. 40 No. 2 (2014); 113-132 Ciencias Marinas; Vol. 40 Núm. 2 (2014); 113-132 2395-9053 0185-3880 eng https://cienciasmarinas.com.mx/index.php/cmarinas/article/view/2403/1475 ['Redalyc'] redalyc_48031366003 Analysis of fetch-limited wave growth using high-frequency radars in the Gulf of Tehuantepec ['Analysis of fetch-limited wave growth using high-frequency radars in the Gulf of Tehuantepec', 'Vladimir G. Toro', 'Ciencias de la Tierra', 'high', 'fetch', 'swell', 'ASIS buoy', 'frequency ra dars', 'Analysis of fetch-limited wave growth using high-frequency radars in the Gulf of Tehuantepec Vladimir G. Toro Francisco J. Ocampo-Torres Pedro Osuna Héctor García-Nava Xavier Flores-Vidal Reginaldo Durazo Ciencias de la Tierra high fetch swell ASIS buoy frequency ra dars Fetch-limited wave grow th was analyzed using high spatial and temporal resolution measurements obt ained with high-frequency (HF) radars. To calculate the wave spectrum, the second-order echo ( S 2 N ) was extracted from the Doppler spectrum and mapped to the wave frequency domain. The conversion of S 2 N to the wave frequency spectrum was carried out us ing a linear parametric model dependent on wind speed. Wave growth, represented by the dime nsionless energy and peak frequency as a f unction of dimensionles s fetch, was determ ined from the spectra calculated for 25 cells (~400 km 2 ) in the vicinity of a moored Air–Sea Interacti on Spar buoy. The buoy data were used as reference and to provide the wind informa tion required for the wave growth analysis. The simultaneous data from the buoy and HF radars sh owed a suitable agreement with the wave growth curves. The analysis of the 25 cells showed an adequate agreement and certain dispersio n around the growth curves. Possible causes of this disp ersion are related to errors in the est imation of the frequency spectrum and fetch, and the assumption of homogeneous wind conditions. Fr om the limited data set used, it was not possible to prove any impact of swell on wave growth ; however, it is possible that analysis over a wider range of swell heights may provide this evidence. Neverthe less, the results suggest that the linear parametric model is able to re produce fetch-limited wave growth. This work represents th e first effort focu sed on fetch-limited wave growth using HF radars. 2014 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48031366003 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.2 Vol.40'] ['Vladimir G. Toro'] ['Vladimir G. Toro'] ['Artículo científico'] ['2014'] ['Universidad Autónoma de Baja California'] ['en'] ['Ciencias de la Tierra', 'high', 'fetch', 'swell', 'ASIS buoy', 'frequency ra dars'] ['https://www.redalyc.org/articulo.oa?id=48031366003'] ['Analysis of fetch-limited wave growth using high-frequency radars in the Gulf of Tehuantepec Vladimir G. Toro Francisco J. Ocampo-Torres Pedro Osuna Héctor García-Nava Xavier Flores-Vidal Reginaldo Durazo Ciencias de la Tierra high fetch swell ASIS buoy frequency ra dars Fetch-limited wave grow th was analyzed using high spatial and temporal resolution measurements obt ained with high-frequency (HF) radars. To calculate the wave spectrum, the second-order echo ( S 2 N ) was extracted from the Doppler spectrum and mapped to the wave frequency domain. The conversion of S 2 N to the wave frequency spectrum was carried out us ing a linear parametric model dependent on wind speed. Wave growth, represented by the dime nsionless energy and peak frequency as a f unction of dimensionles s fetch, was determ ined from the spectra calculated for 25 cells (~400 km 2 ) in the vicinity of a moored Air–Sea Interacti on Spar buoy. The buoy data were used as reference and to provide the wind informa tion required for the wave growth analysis. The simultaneous data from the buoy and HF radars sh owed a suitable agreement with the wave growth curves. The analysis of the 25 cells showed an adequate agreement and certain dispersio n around the growth curves. Possible causes of this disp ersion are related to errors in the est imation of the frequency spectrum and fetch, and the assumption of homogeneous wind conditions. Fr om the limited data set used, it was not possible to prove any impact of swell on wave growth ; however, it is possible that analysis over a wider range of swell heights may provide this evidence. Neverthe less, the results suggest that the linear parametric model is able to re produce fetch-limited wave growth. This work represents th e first effort focu sed on fetch-limited wave growth using HF radars. 2014 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48031366003 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.2 Vol.40'] |
| spellingShingle | Analysis of fetch-limited wave growth using high-frequency radars in the Gulf of Tehuantepec Vladimir G. Toro Ciencias de la Tierra high fetch swell ASIS buoy frequency ra dars Analysis of fetch-limited wave growth using high-frequency radars in the Gulf of Tehuantepec Vladimir G. Toro Francisco J. Ocampo-Torres Pedro Osuna Héctor García-Nava Xavier Flores-Vidal Reginaldo Durazo Ciencias de la Tierra high fetch swell ASIS buoy frequency ra dars Fetch-limited wave grow th was analyzed using high spatial and temporal resolution measurements obt ained with high-frequency (HF) radars. To calculate the wave spectrum, the second-order echo ( S 2 N ) was extracted from the Doppler spectrum and mapped to the wave frequency domain. The conversion of S 2 N to the wave frequency spectrum was carried out us ing a linear parametric model dependent on wind speed. Wave growth, represented by the dime nsionless energy and peak frequency as a f unction of dimensionles s fetch, was determ ined from the spectra calculated for 25 cells (~400 km 2 ) in the vicinity of a moored Air–Sea Interacti on Spar buoy. The buoy data were used as reference and to provide the wind informa tion required for the wave growth analysis. The simultaneous data from the buoy and HF radars sh owed a suitable agreement with the wave growth curves. The analysis of the 25 cells showed an adequate agreement and certain dispersio n around the growth curves. Possible causes of this disp ersion are related to errors in the est imation of the frequency spectrum and fetch, and the assumption of homogeneous wind conditions. Fr om the limited data set used, it was not possible to prove any impact of swell on wave growth ; however, it is possible that analysis over a wider range of swell heights may provide this evidence. Neverthe less, the results suggest that the linear parametric model is able to re produce fetch-limited wave growth. This work represents th e first effort focu sed on fetch-limited wave growth using HF radars. 2014 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48031366003 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.2 Vol.40 |
| title | Analysis of fetch-limited wave growth using high-frequency radars in the Gulf of Tehuantepec |
| title_alt | Análisis del crecimiento del oleaje limitado por el fetch usando radares dealta frecuencia en el golfo de Tehuantepec |
| topic | Ciencias de la Tierra high fetch swell ASIS buoy frequency ra dars |
| url | https://www.redalyc.org/articulo.oa?id=48031366003 https://cienciasmarinas.com.mx/index.php/cmarinas/article/view/2403 |