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Acoustic and optical variations during rapid downward motion episodes in the deep north-western Mediterranean Sea

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Acoustic and optical variations during rapid downward motion episodes in the deep north-western Mediterranean Sea

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dc.contributor.author	ANTARES Collaboration
dc.contributor.author	Aguilar Sánchez, Juan Antonio
dc.contributor.author	Bigongiari, C.
dc.contributor.author	Dornic, Damien
dc.contributor.author	Emanuele, U.
dc.contributor.author	Gómez González, Juan Pablo
dc.contributor.author	Hernández Rey, Juan José
dc.contributor.author	Mangano, Salvatore
dc.contributor.author	Salesa Greus, Francisco
dc.contributor.author	Toscano, S.
dc.contributor.author	Yepes Ramírez, Harold
dc.contributor.author	Zornoza Gómez, Juan de Dios
dc.contributor.author	Zúñiga Román, Juan
dc.date.accessioned	2016-05-20T12:33:29Z
dc.date.available	2016-05-20T12:33:29Z
dc.date.issued	2011
dc.identifier.citation	ANTARES Collaboration Aguilar Sánchez, Juan Antonio Bigongiari, C. Dornic, Damien Emanuele, U. Gómez González, Juan Pablo Hernández Rey, Juan José Mangano, Salvatore Salesa Greus, Francisco Toscano, S. Yepes Ramírez, Harold Zornoza Gómez, Juan de Dios Zúñiga Román, Juan 2011 Acoustic and optical variations during rapid downward motion episodes in the deep north-western Mediterranean Sea Deep-Sea Research Part I-Oceanographic Research Papers 58 8 875 884
dc.identifier.uri	http://hdl.handle.net/10550/53652
dc.description.abstract	An Acoustic Doppler Current Profiler (ADCP) was moored at the deep-sea site of the ANTARES neutrino telescope near Toulon, France, thus providing a unique opportunity to compare high-resolution acoustic and optical observations between 70 and 170 m above the sea bed at 2475 m. The ADCP measured downward vertical currents of magnitudes up to 0.03 m s(-1) in late winter and early spring 2006. In the same period, observations were made of enhanced levels of acoustic reflection, interpreted as suspended particles including zooplankton, by a factor of about 10 and of horizontal currents reaching 0.35 m s(-1). These observations coincided with high light levels detected by the telescope, interpreted as increased bioluminescence. During winter 2006 deep dense-water formation occurred in the Ligurian subbasin, thus providing a possible explanation for these observations. However, the 10-20 days quasi-periodic episodes of high levels of acoustic reflection, light and large vertical currents continuing into the summer are not direct evidence of this process. It is hypothesized that the main process allowing for suspended material to be moved vertically later in the year is local advection, linked with topographic boundary current instabilities along the rim of the 'Northern Current'.
dc.language.iso	eng
dc.relation.ispartof	Deep-Sea Research Part I-Oceanographic Research Papers, 2011, vol. 58, num. 8, p. 875-884
dc.subject	Física nuclear
dc.title	Acoustic and optical variations during rapid downward motion episodes in the deep north-western Mediterranean Sea
dc.type	journal article	es_ES
dc.date.updated	2016-05-20T12:33:30Z
dc.identifier.doi	10.1016/j.dsr.2011.06.006
dc.identifier.idgrec	068307
dc.rights.accessRights	open access	es_ES