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  1. AU="Fuda, J. -L."
  2. AU="Gable, Lance"
  3. AU=Fernandes-Silva Hugo
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  1. Book ; Online: Characterization of turbulence from a fine-scale parameterization and microstructure measurements in the Mediterranean Sea during the BOUM experiment

    Cuypers, Y. / Bouruet-Aubertot, P. / Marec, C. / Fuda, J.-L.

    eISSN: 1726-4189

    2012  

    Abstract: One of the main purposes of the BOUM experiment was to find evidence of the possible impact of submesoscale dynamics on biogeochemical cycles. To this aim physical as well as biogeochemical data were collected along a zonal transect through the western ... ...

    Abstract One of the main purposes of the BOUM experiment was to find evidence of the possible impact of submesoscale dynamics on biogeochemical cycles. To this aim physical as well as biogeochemical data were collected along a zonal transect through the western and eastern basins of the Mediterranean Sea. Along this transect 3-day fixed point stations were performed within anticyclonic eddies during which microstructure measurements of the temperature gradient were collected over the top 100 m of the water column. We focus here on the characterization of turbulent mixing. The analysis of microstructure measurements revealed a high level of turbulent kinetic energy (TKE) dissipation rate in the seasonal pycnocline and a moderate level below with mean values of the order of 10 −6 W kg −1 and 10 −8 W kg −1 , respectively. The Gregg Henyey (Gregg, 1989) fine-scale parameterization of TKE dissipation rate produced by internal wave breaking, and adapted here following Polzin et al. (1995) to take into account the strain to shear ratio, was first compared to these direct measurements with favorable results. The parameterization was then applied to the whole data set. Within the eddies, a significant increase of dissipation at the top and base of eddies associated with strong near-inertial waves is observed. Vertical turbulent diffusivity is increased both in these regions and in the weakly stratified eddy core. The stations collected along the East–West transect provide an overview of parameterized TKE dissipation rates and vertical turbulent diffusivity over a latitudinal section of the Mediterranean Sea. Strong TKE dissipation rates are found within the first 500 m and up to 1500 m above the bottom. Close to the bottom where the stratification is weak, the inferred vertical turbulent diffusivity can reach K z ≃10 −3 m 2 s −1 and may therefore have a strong impact on the upward diffusive transport of deep waters masses.
    Subject code 333 ; 551
    Language English
    Publishing date 2012-08-14
    Publishing country de
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Book ; Online: Long-term monitoring programme of the hydrological variability in the Mediterranean Sea

    Schroeder, K. / Millot, C. / Bengara, L. / Ben Ismail, S. / Bensi, M. / Borghini, M. / Budillon, G. / Cardin, V. / Coppola, L. / Curtil, C. / Drago, A. / Moumni, B. / Font, J. / Fuda, J. L. / García-Lafuente, J. / Gasparini, G. P. / Kontoyiannis, H. / Lefevre, D. / Puig, P. /
    Raimbault, P. / Rougier, G. / Salat, J. / Sammari, C. / Sánchez Garrido, J. C. / Sanchez-Roman, A. / Sparnocchia, S. / Tamburini, C. / Taupier-Letage, I. / Theocharis, A. / Vargas-Yáñez, M. / Vetrano, A.

    eISSN: 1812-0792

    a first overview of the HYDROCHANGES network

    2018  

    Abstract: The long-term monitoring of basic hydrological parameters (temperature and salinity), collected as time series with adequate temporal resolution (i.e. with a sampling interval allowing the resolution of all important timescales) in key places of the ... ...

    Abstract The long-term monitoring of basic hydrological parameters (temperature and salinity), collected as time series with adequate temporal resolution (i.e. with a sampling interval allowing the resolution of all important timescales) in key places of the Mediterranean Sea (straits and channels, zones of dense water formation, deep parts of the basins), constitute a priority in the context of global changes. This led CIESM (The Mediterranean Science Commission) to support, since 2002, the HYDROCHANGES programme ( http//www.ciesm.org/marine/programs/hydrochanges.htm ), a network of autonomous conductivity, temperature, and depth (CTD) sensors, deployed on mainly short and easily manageable subsurface moorings, within the core of a certain water mass. The HYDROCHANGES strategy is twofold and develops on different scales. To get information about long-term changes of hydrological characteristics, long time series are needed. But before these series are long enough they allow the detection of links between them at shorter timescales that may provide extremely valuable information about the functioning of the Mediterranean Sea. The aim of this paper is to present the history of the programme and the current set-up of the network (monitored sites, involved groups) as well as to provide for the first time an overview of all the time series collected under the HYDROCHANGES umbrella, discussing the results obtained thanks to the programme.
    Subject code 551
    Language English
    Publishing date 2018-01-15
    Publishing country de
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Comparison of XCTD/CTD data

    Aberola, C. / Millot, C. / Send, Uwe / Mertens, C. / Fuda, J.-L.

    1996  

    Abstract: XCTD (eXpendable Conductivity Temperature Depth) probes, developed recently by SIPPICAN Inc., have been used simultaneously with a CTD sonde in order to test, in the field, their performance and accuracy (interpreted as ±2 standard deviations of the XCTD- ...

    Abstract XCTD (eXpendable Conductivity Temperature Depth) probes, developed recently by SIPPICAN Inc., have been used simultaneously with a CTD sonde in order to test, in the field, their performance and accuracy (interpreted as ±2 standard deviations of the XCTD-CTD differences). We have taken advantage, during the THETIS-I experiment in March 1992, of both the homogeneous and the stratified areas encountered in winter in the northern part of the western Mediterranean Sea to differentiate the errors due to the experimental conditions from those effectively due to the sensors. Although some intrinsic problems are evident, so that only seven out of the nine probes considered for comparison are usable, the accuracy specified by the manufacturer for the temperature (AT = ± 0.03°C) is reached after standard processing, while the accuracies in conductivity, salinity and potential density are AC ≈ ± 0.06 mS/cm (the specified value is AC = ± 0.03 mS/cm), AS ≈ ± 0.04 and Aσθ ≈ ±3 kg/m3. However, when the experimental errors (in situ natural variability, relatively rough estimation of the XCTD depth) are considered, it appears that the effective accuracies of the XCTD sensors are better than ± 0.02°C and ± 0.04 mS/cm, that is to say better than and close to the specified values of ± 0.03°C and ± 0.03 mS/cm. Occasional offsets in conductivity can further be well corrected for by using a temperature-salinity relation in some limited depth range and area where this relation is known to hold well; the conductivity-sensor accuracy then significantly improves to AC≈ ± 0.02 mS/cm resulting, for our study area, in corresponding salinity and potential density accuracies of AS≈ ± 0.03 and Aσθ ≈ ± 0.02 kg/m3. Thus, such instruments promise to be useful tools for many experimental studies. Complementary comparisons, performed with new versions of the XCTD probes under less convenient experimental conditions, are also presented
    Subject code 621
    Language English
    Publisher Elsevier
    Publishing country de
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Book ; Online: Rapid subduction in the deep North Western Mediterranean

    Aguilar, J. A. / Albert, A. / Anghinolfi, M. / Anton, G. / Anvar, S. / Ardid, M. / Assis Jesus, A. C. / Astraatmadja, T. / Aubert, J.-J. / Auer, R. / Baret, B. / Basa, S. / Bazzotti, M. / Bertin, V. / Biagi, S. / Bigongiari, C. / Bou-Cabo, M. / Bouwhuis, M. C. / Brown, A. /
    Brunner, J. / Busto, J. / Camarena, F. / Capone, A. / Carminati, G. / Carr, J. / Castel, D. / Castorina, E. / Cavasinni, V. / Cecchini, S. / Charvis, Ph. / Chiarusi, T. / Circella, M. / Coniglione, R. / Costantini, H. / Cottini, N. / Coyle, P. / Curtil, C. / Bonis, G. / Decowski, M. P. / Dekeyser, I. / Deschamps, A. / Distefano, C. / Donzaud, C. / Dornic, D. / Drouhin, D. / Eberl, T. / Emanuele, U. / Ernenwein, J.-P. / Escoffier, S. / Fehr, F. / Flaminio, V. / Fratini, K. / Fritsch, U. / Fuda, J.-L. / Giacomelli, G. / Gómez-González, J. P. / Graf, K. / Guillard, G. / Halladjian, G. / Hallewell, G. / Haren, H. / Heijboer, A. J. / Hello, Y. / Hernández-Rey, J. J. / Hößl, J. / Jong, M. / Kalantar-Nayestanaki, N. / Kalekin, O. / Kappes, A. / Katz, U. / Kooijman, P. / Kopper, C. / Kouchner, A. / Kretschmer, W. / Lahmann, R. / Lamare, P. / Lambard, G. / Larosa, G. / Laschinsky, H. / Lefèvre, D. / Lelaizant, G. / Lim, G. / Presti, D. / Loehner, H. / Loucatos, S. / Lucarelli, F. / Lyons, K. / Mangano, S. / Marcelin, M. / Margiotta, A. / Martinez-Mora, J. A. / Maurin, G. / Mazure, A. / Melissas, M. / Montaruli, T. / Morganti, M. / Moscoso, L. / Motz, H. / Naumann, C. / Neff, M. / Ostasch, R. / Palioselitis, G. / Păvălaş, G. E. / Payre, P. / Petrovic, J. / Piattelli, P. / Picot-Clemente, N. / Picq, C. / Pillet, R. / Popa, V. / Pradier, T. / Presani, E. / Racca, C. / Radu, A. / Reed, C. / Riccobene, G. / Richardt, C. / Rujoiu, M. / Russo, G. V. / Salesa, F. / Schoeck, F. / Schuller, J.-P. / Shanidze, R. / Simeone, F. / Spurio, M. / Steijger, J. J. M. / Stolarczyk, Th. / Tamburini, C. / Tasca, L. / Taupier-Letage, I. / Toscano, S. / Vallage, B. / Elewyck, V. / Vecchi, M. / Vernin, P. / Wijnker, G. / Wolf, E. / Yepes, H. / Zaborov, D. / Zornoza, J. D. / Zúñiga, J.

    eISSN: 1812-0792

    2018  

    Abstract: An Acoustic Doppler Current Profiler (ADCP) moored at the deep-sea ANTARES neutrino telescope site near Toulon, France, measured downward vertical currents of amplitudes up to 0.03 m s −1 in spring 2006. The currents were accompanied by enhanced levels ... ...

    Abstract An Acoustic Doppler Current Profiler (ADCP) moored at the deep-sea ANTARES neutrino telescope site near Toulon, France, measured downward vertical currents of amplitudes up to 0.03 m s −1 in spring 2006. The currents were accompanied by enhanced levels of acoustic reflection by a factor of about 10 and by horizontal currents reaching 0.35 m s −1 . These observations coincided with high levels of bioluminescence detected by the telescope. Although during winter 2006 deep dense-water formation occurred in this area, episodes of high levels of suspended particles and large vertical currents continuing into the summer are not direct evidence of this process. It is hypothesized that the main process allowing for particles to be moved across the entire water column (2500 m) within a few days, is local convection, triggered by small-mesoscale phenomena, such as meanders including a bipolar vortex, linked with boundary current instabilities.
    Subject code 551
    Language English
    Publishing date 2018-08-10
    Publishing country de
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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

    van Haren, H / Taupier-Letage, I / Aguilar, J.A / Albert, A / Anghinolfi, M / Anton, G / Anvar, S / Ardid, M / Assis Jesus, A.C / Astraatmadja, T / Aubert, J.-J / Auer, R / Baret, B / Basa, S / Bazzotti, M / Bertin, V / Biagi, S / Bigongiari, C / Bou-Cabo, M /
    Bouwhuis, M.C / Brown, A / Brunner, J / Busto, J / Camarena, F / Capone, A / Carminati, G / Carr, J / Castel, D / Castorina, E / Cavasinni, V / Cecchini, S / Charvis, Ph / Chiarusi, T / Circella, M / Coniglione, R / Costantini, H / Cottini, N / Coyle, P / Curtil, C / De Bonis, G / Decowski, M.P / Dekeyser, I / Deschamps, A / Distefano, C / Donzaud, C / Dornic, D / Drouhin, D / Eberl, T / Emanuele, U / Ernenwein, J.-P / Escoffier, S / Fehr, F / Flaminio, V / Fratini, K / Fritsch, U / Fuda, J.-L / Giacomelli, G / Gómez-González, J.P / Graf, K / Guillard, G / Halladjian, G / Hallewell, G / Heijboer, A.J / Hello, Y / Hernández-Rey, J.J / Hößl, J / de Jong, M / Kalantar-Nayestanaki, N / Kalekin, O / Kappes, A / Katz, U / Kooijman, P / Kopper, C / Kouchner, A / Kretschmer, W / Lahmann, R / Lamare, P / Lambard, G / Larosa, G / Laschinsky, H / Lefèvre, D / Lelaizant, G / Lim, G / Lo Presti, D / Loehner, H / Loucatos, S / Lucarelli, F / Lyons, K / Mangano, S / Marcelin, M / Margiotta, A / Martinez-Mora, J.A / Maurin, G / Mazure, A / Melissas, M / Montaruli, T / Morganti, M / Moscoso, L / Motz, H / Naumann, C / Neff, M / Ostasch, R / Palioselitis, G / Păvălaş, G.E / Payre, P / Petrovic, J / Piattelli, P / Picot-Clemente, N / Picq, C / Pillet, R / Popa, V / Pradier, T / Presani, E / Racca, C / Radu, A / Reed, C / Riccobene, G / Richardt, C / Rujoiu, M / Russo, G.V / Salesa, F / Schoeck, F / Schuller, J.-P / Shanidze, R / Simeone, F / Spurio, M / Steijger, J.J.M / Stolarczyk, Th / Tamburini, C / Tasca, L / Toscano, S / Vallage, B / Van Elewyck, V / Vecchi, M / Vernin, P / Wijnker, G / de Wolf, E / Yepes, H / Zaborov, D / Zornoza, J.D / Zúñiga, J

    Deep-Sea Research Part I. 2011 Aug., v. 58, no. 8

    2011  

    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 170m above ... ...

    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 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’.
    Keywords acoustics ; bioluminescence ; spring ; summer ; winter ; zooplankton ; France ; Mediterranean Sea
    Language English
    Dates of publication 2011-08
    Size p. 875-884.
    Publishing place Elsevier Ltd
    Document type Article
    ISSN 0967-0637
    DOI 10.1016/j.dsr.2011.06.006
    Database NAL-Catalogue (AGRICOLA)

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  6. Article ; Online: ANTARES Collaboration

    Wagner S. / Visser E. / Vernin P. / Elewyck V. Van / Vecchi M. / Vallée C. / Taiuti M. / Tamburini C. / Trovato A. / Vallage B. / Sánchez-Losa A. / Stolarczyk Th. / Steijger J.J.M. / Spurio M. / Shanidze R. / Simeone F. / Spies A. / Seitz T. / Schüssler F. /
    Schuller J.-P. / Schöck F. / Schnabel J. / Sapienza P. / Schmid J. / Russo G.V. / Samtleben D.F.E. / Rostovtsev A. / Ruiz-Rivas J. / Rujoiu M. / Rivière C. / Robert A. / Roensch K. / Richardt C. / Richter R. / Reed C. / Riccobene G. / Presani E. / Racca C. / Popa V. / Pradier T. / Piattelli P. / Petrovic J. / Payet K. / Palioselitis D. / Păvălas G.E. / Nezri E. / Neff M. / Motz H. / Morganti M. / Moscoso L. / Martini S. / Meli A. / Montaruli T. / Martínez-Mora J.A. / Marcelin M. / Margiotta A. / Mangano S. / Louis F. / Loehner H. / Loucatos S. / Lattuada D. / Lefèvre D. / Lim G. / Lo Presti D. / Lambard G. / Larosa G. / Kulikovskiy V. / Lahmann R. / Kopper C. / Kouchner A. / Kreykenbohm I. / Katz U. / Kavatsyuk O. / Kooijman P. / Kalekin O. / Kappes A. / Kadler M. / Hsu C.C. / de Jong M. / Hößl J. / Herold B. / Hernández-Rey J.J. / Hamal M. / Haren H. van / Heijboer A.J. / Hello Y. / Guillard G. / Hallewell G. / Graf K. / Giacomelli G. / Giordano V. / Gómez-González J.P. / Geyer K. / Galatà S. / Gay P. / Fritsch U. / Fuda J.-L. / Flaminio V. / Folger F. / Ferry S. / Fermani P. / Ferri M. / Ernenwein J.-P. / Escoffier S. / Fehn K. / Enzenhöfer A. / Emanuele U. / Drouhin D. / Eberl T. / Donzaud C. / Dornic D. / Dorosti Q. / Deschamps A. / Distefano C. / Decowski M.P. / Dekeyser I. / Creusot A. / Curtil C. / Bonis G. De / Coyle P. / Core L. / Costantini H. / Chiarusi T. / Circella M. / Coniglione R. / Charvis Ph. / Charif Z. / Carr J. / Cecchini S. / Capone A. / Cârloganu C. / Busto J. / Bouwhuis M.C. / Brunner J. / Bouhou B. / Bogazzi C. / Bou-Cabo M. / Biagi S. / Bigongiari C. / Bertin V. / Basa S. / Astraatmadja T. / Aubert J.-J. / Baret B. / Ardid M. / Anvar S. / Anton L. / Anton G. / Anghinolfi M. / André M. / Albert A. / Samarai I. Al / Adrián-Martínez S. / Wijnker G. / Wilms J. / Wolf E. de / Yepes H. / Zaborov D. / Zornoza J.D. / Zúñiga J.

    EPJ Web of Conferences, Vol 53, p

    2013  Volume 03001

    Keywords Physics ; QC1-999 ; Science ; Q ; DOAJ:Physics (General) ; DOAJ:Physics and Astronomy
    Language English
    Publishing date 2013-06-01T00:00:00Z
    Publisher EDP Sciences
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Book ; Online: Acoustic and optical variations during rapid downward motion episodes in the deep north-western Mediterranean Sea

    van Haren, H. / Taupier-Letage, I. / Aguilar, J. A. / Albert, A. / Anghinolfi, M. / Anton, G. / Anvar, S. / Ardid, M. / Jesus, A. C. Assis / Astraatmadja, T. / Aubert, J. -J. / Auer, R. / Baret, B. / Basa, S. / Bazzotti, M. / Bertin, V. / Biagi, S. / Bigongiari, C. / Bou-Cabof, M. /
    Bouwhuis, M. C. / Brown, A. / Brunner, J. / Busto, J. / Camarena, F. / Capone, A. / Carminati, G. / Carr, J. / Castel, D. / Castorina, E. / Cavasinni, V. / Cecchini, S. / Charvis, Ph. / Chiarusi, T. / Circella, M. / Coniglione, R. / Costantini, H. / Cottini, N. / Coyleh, P. / Curtil, C. / De Bonis, G. / Decowski, M. P. / Dekeyser, I. / Deschamps, A. / Distefano, C. / Donzaud, C. / Dornic, D. / Drouhin, D. / Eberl, T. / Emanuele, U. / Ernenwein, J. -P. / Escoffier, S. / Fehr, F. / Flaminio, V. / Fratini, K. / Fritsch, U. / Fuda, J. -L. / Giacomelli, G. / Gómez-González, J. P. / Graf, K. / Guillard, G. / Halladjian, G. / Hallewell, G. / Heijboer, A. J. / Hello, Y. / Hernández-Rey, J. J. / Hößl, J. / de Jong, M. / Kalantar-Nayestanakia, N. / Kalekin, O. / Kappes, A. / Katz, U. / Kooijman, P. / Kopper, C. / Kouchner, A. / Kretschmer, W. / Lahmann, R. / Lamare, P. / Lambard, G. / Laros, G. / Laschinsky, H. / Lefèvre, D. / Lelaizant, G. / Lim, G. / Presti, D. Lo / Loehner, H. / Loucatos, S. / Lucarelli, F. / Lyons, K. / Mangano, S. / Marcelin, M. / Margiotta, A. / Martinez-Mora, J. A. / Maurin, G. / Mazure, A. / Melissas, M. / Montaruli, T. / Morganti, M. / Moscoso, L. / Motz, H. / Naumann, C. / Neff, M. / Ostasch, R. / Palioselitis, G. / Păvălaş, G. E. / Payre, P. / Petrovic, J. / Piattelli, P. / Picot-Clemente, N. / Picqu, C. / Pillet, R. / Popa, V. / Pradier, T. / Presani, E. / Racca, C. / Radu, A. / Reed, C. / Riccobene, G. / Richardt, C. / Rujoiu, M. / Russo, G. V. / Sales, F. / Schoeck, F. / Schuller, J. -P. / Shanidze, R. / Simeone, F. / Spurio, M. / Steijger, J. J. M. / Stolarczyk, Th. / Tamburini, C. / Tasca, L. / Toscano, S. / Vallage, B. / Van Elewyck, V. / Vecchi, M. / Vernin, P. / Wijnker, G. / de Wolf, E. / Yepes, H. / Zaborov, D. / Zornoza, J. D. / Zúñiga, J.

    2011  

    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 ...

    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'.

    Comment: 30 pages, 7 figures
    Keywords Physics - Geophysics ; Astrophysics - Instrumentation and Methods for Astrophysics ; 86-02
    Subject code 551
    Publishing date 2011-11-28
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Book ; Online: AMADEUS - The Acoustic Neutrino Detection Test System of the ANTARES Deep-Sea Neutrino Telescope

    ANTARES collaboration / Aguilar, J. A. / Samarai, I. Al / Albert, A. / Anghinolfi, M. / Anton, G. / Anvar, S. / Ardid, M. / Jesus, A. C. Assis / Astraatmadja, T. / Aubert, J. -J. / Auer, R. / Barbarito, E. / Baret, B. / Basa, S. / Bazzotti, M. / Bertin, V. / Biagi, S. / Bigongiari, C. /
    Bou-Cabo, M. / Bouwhuis, M. C. / Brown, A. / Brunner, J. / Busto, J. / Camarena, F. / Capone, A. / Cârloganu, C. / Carminati, G. / Carr, J. / Cassano, B. / Castorina, E. / Cavasinni, V. / Cecchini, S. / Ceres, A. / Charvis, Ph. / Chiarusi, T. / Sen, N. Chon / Circella, M. / Coniglione, R. / Costantini, H. / Cottini, N. / Coyle, P. / Curtil, C. / De Bonis, G. / Decowski, M. P. / Dekeyser, I. / Deschamps, A. / Distefano, C. / Donzaud, C. / Dornic, D. / Drouhin, D. / Eberl, T. / Emanuele, U. / Ernenwein, J. -P. / Escoffier, S. / Fehr, F. / Fiorello, C. / Flaminio, V. / Fritsch, U. / Fuda, J. -L. / Gay, P. / Giacomelli, G. / Gómez-González, J. P. / Graf, K. / Guillard, G. / Halladjian, G. / Hallewell, G. / van Haren, H. / Heijboer, A. J. / Heine, E. / Hello, Y. / Hernández-Rey, J. J. / Herold, B. / Hößl, J. / de Jong, M. / Kalantar-Nayestanaki, N. / Kalekin, O. / Kappes, A. / Katz, U. / Keller, P. / Kooijman, P. / Kopper, C. / Kouchner, A. / Kretschmer, W. / Lahmann, R. / Lamare, P. / Lambard, G. / Larosa, G. / Laschinsky, H. / Provost, H. Le / Lefèvre, D. / Lelaizant, G. / Lim, G. / Presti, D. Lo / Loehner, H. / Loucatos, S. / Louis, F. / Lucarelli, F. / Mangano, S. / Marcelin, M. / Margiotta, A. / Martinez-Mora, J. A. / Mazure, A. / Mongelli, M. / Montaruli, T. / Morganti, M. / Moscoso, L. / Motz, H. / Naumann, C. / Neff, M. / Ostasch, R. / Palioselitis, D. / Pavalas, G. E. / Payre, P. / Petrovic, J. / Picot-Clemente, N. / Picq, C. / Popa, V. / Pradier, T. / Presani, E. / Racca, C. / Radu, A. / Reed, C. / Riccobene, G. / Richardt, C. / Rujoiu, M. / Ruppi, M. / Russo, G. V. / Salesa, F. / Sapienza, P. / Schöck, F. / Schuller, J. -P. / Shanidze, R. / Simeone, F. / Spurio, M. / Steijger, J. J. M. / Stolarczyk, Th. / Taiuti, M. / Tamburini, C. / Tasca, L. / Toscano, S. / Vallage, B. / Van Elewyck, V. / Vannoni, G. / Vecchi, M. / Vernin, P. / Wijnker, G. / de Wolf, E. / Yepes, H. / Zaborov, D. / Zornoza, J. D. / Zúñiga, J.

    2010  

    Abstract: The AMADEUS (ANTARES Modules for the Acoustic Detection Under the Sea) system which is described in this article aims at the investigation of techniques for acoustic detection of neutrinos in the deep sea. It is integrated into the ANTARES neutrino ... ...

    Abstract The AMADEUS (ANTARES Modules for the Acoustic Detection Under the Sea) system which is described in this article aims at the investigation of techniques for acoustic detection of neutrinos in the deep sea. It is integrated into the ANTARES neutrino telescope in the Mediterranean Sea. Its acoustic sensors, installed at water depths between 2050 and 2300 m, employ piezo-electric elements for the broad-band recording of signals with frequencies ranging up to 125 kHz. The typical sensitivity of the sensors is around -145 dB re 1V/muPa (including preamplifier). Completed in May 2008, AMADEUS consists of six "acoustic clusters", each comprising six acoustic sensors that are arranged at distances of roughly 1 m from each other. Two vertical mechanical structures (so-called lines) of the ANTARES detector host three acoustic clusters each. Spacings between the clusters range from 14.5 to 340 m. Each cluster contains custom-designed electronics boards to amplify and digitise the acoustic signals from the sensors. An on-shore computer cluster is used to process and filter the data stream and store the selected events. The daily volume of recorded data is about 10 GB. The system is operating continuously and automatically, requiring only little human intervention. AMADEUS allows for extensive studies of both transient signals and ambient noise in the deep sea, as well as signal correlations on several length scales and localisation of acoustic point sources. Thus the system is excellently suited to assess the background conditions for the measurement of the bipolar pulses expected to originate from neutrino interactions.

    Comment: 36 pages, 19 figures; v3: Line numbers removed (no changes to text)
    Keywords Astrophysics - Instrumentation and Methods for Astrophysics
    Subject code 551
    Publishing date 2010-09-21
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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