Van Haren, H.; Taupier-Letage, I.; Aguilar, JA.; Albert, A.; Anghinolfi, M.; Anton, G.; Anvar, S.... (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. https://doi.org/10.1016/j.dsr.2011.06.006
Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10251/46744
Title:
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Acoustic and optical variations during rapid downward motion episodes in the deep north-western Mediterranean Sea
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Author:
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Van Haren, H.
Taupier-Letage, I.
Aguilar, J. A.
Albert, A
Anghinolfi, M.
Anton, G
Anvar, S.
Ardid Ramírez, Miguel
Jesus, A. C. Assis
Astraatmadja, T.
Aubert, J. J.
Bou Cabo, Manuel
Camarena Femenia, Francisco
Larosa, Giuseppina
Martínez Mora, Juan Antonio
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UPV Unit:
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Universitat Politècnica de València. Departamento de Física Aplicada - Departament de Física Aplicada
Universitat Politècnica de València. Instituto de Investigación para la Gestión Integral de Zonas Costeras - Institut d'Investigació per a la Gestió Integral de Zones Costaneres
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Issued date:
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Abstract:
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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 ...[+]
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 170m above the sea bed at 2475m. The ADCP measured downward vertical currents of magnitudes up to 0.03ms -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 0.35ms -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'.
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Subjects:
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Acoustic ADCP observations
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ANTARES neutrino telescope
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Bioluminescence
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Deep Mediteranean
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Dense water formation
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Episodic downward current
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Northern boundary current
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Optical photo-multiplier observations
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ANTARES
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Boundary currents
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Dense waters
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Acoustic variables measurement
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Doppler effect
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Elementary particles
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Optical telescopes
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Phosphorescence
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Telescopes
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Light reflection
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Acoustic Doppler Current Profiler
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Acoustic wave
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Advection
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Boundary current
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Deep sea
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Dense water
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Observational method
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Optical method
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Suspended load
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Wave reflection
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Zooplankton
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Mediterranean Sea
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Mediterranean Sea (Northwest)
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Copyrigths:
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Reserva de todos los derechos
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Source:
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Deep Sea Research Part I: Oceanographic Research Papers. (issn:
0967-0637
)
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DOI:
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10.1016/j.dsr.2011.06.006
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Publisher:
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Elsevier
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Publisher version:
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http://dx.doi.org/10.1016/j.dsr.2011.06.006
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Thanks:
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Satellite images are obtained from NASA/MODIS, processed by Werner and available on the Nausicaa/MarCoast server. We thank Michel Crepon, Claude Millot and anonymous referees for commenting an earlier draft. The authors ...[+]
Satellite images are obtained from NASA/MODIS, processed by Werner and available on the Nausicaa/MarCoast server. We thank Michel Crepon, Claude Millot and anonymous referees for commenting an earlier draft. The authors acknowledge the financial support of the funding agencies: Centre National de la Recherche Scientifique (CNRS), Commissariat a l'Energie Atomique (CEA), Commission Europeenne (FEDER fund and Marie Curie Program), Region Alsace (contrat CPER), Region Provence-Alpes-Cote d'Azur, Departement du Var and Ville de La Seyne-sur-Mer, in France; Bundesministerium fur Bildung und Forschung (BMBF), in Germany; Istituto Nazionale di Fisica Nucleare (INFN), in Italy; Stichting voor Fundamenteel Onderzoek der Materie (FOM), Nederlandse organisatie voor Wetenschappelijk Onderzoek (NWO), in the Netherlands; Federal Agency for Science and Innovation (Rosnauka), in Russia; National Authority for Scientific Research (ANCS) in Romania; Ministerio de Ciencia e Innovacion (MICINN), in Spain. We also acknowledge the technical support of Ifremer, AIM and Foselev Marine for the sea operation and the CC-IN2P3 for the computing facilities.
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Type:
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Artículo
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