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Characterization of the energy cascade using high resolution multichannel seismic data

AuthorsMojica, J.F. ; Sallarès, Valentí ; Biescas, Berta ; Klaeschen, Dirk; Bornstein, G.
Issue Date11-Jun-2014
CitationBook of Abstracts submitted to the IV Congress of Marine Sciences. Las Palmas de Gran Canaria, June 11th to 13th: 145 (2014)
AbstractWe analyze multichannel seismic data acquired around the thermocline (30 to 150 m deep) along profiles of 30 km using a high resolution system with a peak frequency of 150 Hz. The lateral and vertical resolution is 13 m and 2 m respectively, allows us to characterize the energy cascade of the Alboran Sea with unprecedented lateral resolution. The spectral analysis shows characteristics of three different processes. At largest horizontal wavenumbers, (1 to 10 km-1), the spectral slope is -2.01 + 0.09 in agreement with that described for internal waves, whereas at the shortest wavenumbers (32 to 70 km-1), we obtain a slope of -1.54 ± 0.56, which corresponds to a turbulent spectra. In between, it can be distinguished a third domain with slope of -2.89 + 0.32 in the range of [10.2 to 30.4 km-1]. The slope, the wavenumber range and the fact that our data was acquired in an area with significantly strong stratification and shear due to the constant exchange of Atlantic and Mediterranean waters, suggest that this domain could be dominated by the formation of Kelvin-Helmholtz instabilities
DescriptionIV Congress of Marine Sciences, Encuentro de la Oceanografía Física Española (EOF 2014), 11-13 June 2014, Las Palmas de Gran Canaria.-- 1 page
Publisher version (URL)http://ivcongresoccm.ulpgc.es/siquimar14/programa
Identifiersisbn: 978-84-697-0471-4
Appears in Collections:(ICM) Libros y partes de libros
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