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Detection of drogue loss events from drifter positioning data

AuthorsVallès Casanova, Ignasi Berenguer ; Pelegrí, Josep Lluís ; Salvador, Joaquín ; Font, Jordi ; Roget, E.
Issue Date20-Jul-2016
PublisherUniversidad de Alicante
CitationLibro de Resúmenes. IV Encuentro Oceanografía Física Española: 138-140 (2016)
AbstractSatellite-tracked drifting buoys are useful for sampling sea-surface currents. Standard drifting buoys have drogues centred at a depth of 15 m, a fundamental element that guarantees that the direct wind force on the buoy is much smaller than the drag on the anchor. When a drifter loses its drogue, it no longer becomes a good tracker of the surface currents, hence the relevance of identifying when this happens. Here we propose a spectral-based approach to analyse drifter velocity data so as to detect when a drifter loses its drogue without the need of concurrent wind data. The method, applied to data obtained during the SPURS 2013 cruise, shows a substantial increase in the band-passed velocity energy at the time the drifter loses its drogue, as deduced with an independent method that considers the temporal change of the correlation between wind and positioning data. The results are very promising, pointing at a new method that can detect drogue loss from a relatively simple analysis of positioning data
DescriptionIV Encuentro Oceanografía Física Española, celebrado del 20 al 22 de julio de 2016 en Alicante, España.-- 3 pages, 1 figure
Publisher version (URL)http://rua.ua.es/dspace/handle/10045/59211
Identifiersisbn: 978-84-16724-17-8
Appears in Collections:(ICM) Libros y partes de libros
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