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Poleward along-shore current pulses on the inner shelf of the Bay of Biscay ArchiMer
Kersale, M.; Marie, Louis; Le Cann, B.; Serpette, A.; Lathuiliere, C.; Le Boyer, A.; Rubio, A.; Lazure, Pascal.
We analyzed strong events of coastal poleward along-shore currents above 10 cm s−1 and up to more than 50 cm s−1 on the inner shelf (50-80 m depth) of the Bay of Biscay (BoB) from the Spanish coast to the Brittany coast. We used data from four acoustic Doppler current profilers (ADCPs) deployed from July 2009 to August 2011. The goal of this study was to analyze current variability at meso- and subinertial scales and their generation mechanisms. These currents occurred all year long and were classified into three types. Events occurring principally in the southern part of the BoB were classified as southern events. Bay-scale events were defined when strong poleward currents were detected over all the shelf, typically stronger on the Spanish and the...
Tipo: Text Palavras-chave: Coastal jets; ADCP; Shelf circulation; Wind forcing; Coastal trapped waves; Bay of Biscay.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00299/40984/40075.pdf
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Scales characterising a high density thin layer of Dinophysis acuta Ehrenberg and its transport within a coastal jet ArchiMer
Farrell, Hazel; Gentien, Patrick; Fernand, Liam; Lunven, Michel; Reguera, Beatriz; Gonzalez-gil, Sonsoles; Raine, Robin.
An investigation into the distribution of Dinophysis spp. in coastal waters off the south coast of Ireland was carried out in July 2007. Dinophysis acuta was present as a sub surface layer containing up to 55,000 cells L-1. The population had a high percentage of viable cells (mean: 89%; median: 94%; n = 24) with a high specific division rate (~0.55 d-1). The layer, of approximately 5 m thickness, did not coincide with the fluorescence maximum and was present as a patch of horizontal dimension less than 10 km x 7 km. Both conventional and towed undulating CTD used in conjunction with high vertical resolution sampling methods showed the patch of Dinophysis to move with a similar speed and direction as the coastal flow, which ran parallel to the coast in the...
Tipo: Text Palavras-chave: Coastal jets; Dinophysis; Ireland; Transport.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00064/17538/17420.pdf
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