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Título

Surface circulation patterns in the Ibiza Channel from HF Radar data

AutorLana, Arantxa ; Fernández, Vicente; Pascual, Ananda ; Orfila, Alejandro ; Tintoré, Joaquín
Fecha de publicación11-jun-2014
CitaciónEOF2014 - III Encuentro de la Oceanografía Física Española (2014)
ResumenA High Frequency (HF) Radar system which consists of two CODAR stations - located in Ibiza and Formentera Islands - provides real time information of the variability of surface circulation patterns in the Ibiza Channel. This area is a well-known biodiversity hot spot in the Mediterranean Sea, and dinamically relevant due to the interaction of water masses coming from the Atlantic Ocean - ascending through the Iberian Peninsula coast - with the older Mediterranean waters descending from the Gulf of Lion. The HF Radar system operates operationally since June 2012 up to now, providing hourly surface current maps with a spatial resolution of approximately 3 km and coverage up to 70 km offshore. Radial data from each antenna, as well as the combined total surface currents are Quality-Controlled in order to ensure that the data being produced are of the highest quality. Initital results from validation of HF Radar data against drifter-derived velocities; satellite altimetry and current meter from a fixed mooring provide confidence in the HF Radar data. A quantitative description of the spatial patterns observed by the HF Radar at different temporal scales (inertial, sub-intertial and tidal) and their contribution to the total kinetic energy (KE) has been analysed for the first time in the area. Inertial currents have a lower contribution to the total KE during winter, compared with the summer period. Additionally, the spatial distribution of the inertial component to the total KE varies seasonally, and according to the bathymetry. The low-pass (sub-inertial) filtered HF Radar currents show a predominant Northern current during the summer months in the channel, and a mean Southern current during the winter period. The semidiurnal tidal component amplitude shows a distribution deeply related to the bathymetry of the area. These results will be analysed, discussed and related to the external forcing and the regional bathymetry
DescripciónTrabajo presentado en EOF2014, III Encuentro de la Oceanografía Física Española, celebrada del 11 al 13 de junio de 2014 en Las Palmas de Gran Canaria (España)
Abstract publicado en un volumen conjuntamente con los trabajos presentados en el IV Congreso de Ciencias del Mar y el XVII Seminario Ibérico de Química Marina
URIhttp://hdl.handle.net/10261/123241
Aparece en las colecciones: (IMEDEA) Comunicaciones congresos
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