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Gerber, H. W.
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Gerber, H. W.
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- PublicationOpen AccessAnalysis of ADCP data above a bottom observatory(2006-03-20)
; ; ; ; ;Fuda, J. L.; Laboratoire d'Océanographie et de Biogéochimie, Antenne LOB, BP 330, F-83507 La Seyne/mer, ;Millot, C.; Laboratoire d'Océanographie et de Biogéochimie, Antenne LOB, BP 330, F-83507 La Seyne/mer, ;Hoog, S.; Technical University of Berlin, Salzufer 17-19, Sekr. SG17, D-10587 Berlin ;Gerber, H.; TFH Berlin - University of Applied Sciences, FB VIII, Luxemburger Str. 10, D- 13357 Berlin; ; ; A 300-kHz ADCP was set on GEOSTAR, a six-m3 deep-sea observatory. It was operated with cells of 80 cm during a three-week test experiment at 42-m water depth in the northern Adriatic sub-basin. Although it provided valuable data about the horizontal current field over most of the water column, it also allowed specifying the wake disturbances induced by the observatory. These disturbances are characterised by vertical velocities that are significant up to ~20 m above seafloor (echo intensity data suggest that the wake can even reach the surface), and by inclinations of the bottom nepheloïd layer (as deduced from differences in echo intensities from beam to beam). Our analysis is validated by consistent relationships between the horizontal current direction and speed on one side and the characteristics of both dynamical (vertical velocity) and non-dynamical (echo intensity) parameters on the other side. It is in good agreement with the simulations from a numerical model, and hence specifies the sensitivity (especially with respect to echo intensity) and accuracy of an instrument usually operated within fields of current and scatterers not disturbed by the device supporting it. In addition, the error velocity parameter displays specific characteristics that easily allow specifying the thickness of the layer disturbed by the observatory, thus providing a technique to validate the quality of data acquired in similar conditions.218 624 - PublicationRestrictedNEMO-SN-1 the first "real-time" seafloor observatory of ESONET(2006)
; ; ; ; ; ;Favali, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Beranzoli, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;D'Anna, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italia ;Gasparoni, F.; Tecnomare-ENI S.p.A., Venice, Italy ;Gerber, H. W.; Technische Fachhochschule, Berlin, Germany; ; ; ; The fruitful collaboration between Italian Research Institutions, particularly Istituto Nazionale di Fisica Nucleare (INFN) and Istituto Nazionale di Geofisica e Vulcanologia (INGV) together with Marine Engineering Companies, led to the development of NEMOSN- 1, the first European cabled seafloor multiparameter observatory. This observatory, deployed at 2060m w.d. about 12 miles off-shore the Eastern coasts of Sicily (Southern Italy), is in real-time acquisition since January 2005 and addressed to different set of measurements: geophysical and oceanographic. In particular the SN-1 seismological data are integrated in the INGV land-based national seismic network, and they arrive in real-time to the Operative Centre in Rome. In the European Commission (EC) European Seafloor Observatory NETwork (ESONET) project, in connection to the Global Monitoring for Environment and Security (GMES) action plan, the NEMO-SN-1 site has been proposed as an European key area, both for its intrinsic importance for geo-hazards and for the availability of infrastructure as a stepwise development in GMES program. Presently, NEMO-SN-1 is the only ESONET site operative. The paper gives a description of SN-1 observatory with examples of data.5200 110 - PublicationOpen AccessThe exploration of eastern Mediterranean deep hypersaline anoxic basins with MODUS: a significant example of technology spin-off from the Geostar Program(2006-03-20)
; ; ; ; ;Malinverno, E.; CoNISMa L.R.U. – Department of Geological Sciences and Geotechnologies, University of Milano-Bicocca - Piazza della Scienza, 4 – 20126 MILANO, Italy ;Gasparoni, F.; Tecnomare SpA - San Marco, 3584 – 30124 VENEZIA, Italy ;Gerber, H. W.; TFH Berlin, University of Applied Sciences - Luxemburger Str. 10 – D-13353 BERLIN, Germany ;Corselli, C.; CoNISMa L.R.U. – Department of Geological Sciences and Geotechnologies, University of Milano-Bicocca - Piazza della Scienza, 4 – 20126 MILANO, Italy; ; ; A significant example of technological spin-off from the GEOSTAR project is represented by the special-purpose instrumented module, based on the deep-sea ROV MODUS, which was developed in the framework of the EU-sponsored project BIODEEP. The goal to be achieved has been defined as the exploration, through real-time video images, measurements and accurate video-guided sampling, of the deep hypersaline anoxic basins of the eastern Mediterranean Sea at water depths well exceeding 3000 meters. Due to their peculiar characteristics, these basins are one of the most extreme environments on Earth and represent a site of utmost interest for their geochemical and microbial resources. The paper presents the strategies and the main results achieved during the two cruises carried out within the BIODEEP project.189 190 - PublicationOpen AccessA fleet of multiparameter observatories for geophysical and environmental monitoring at seafloor(2006-03-20)
; ; ; ; ; ; ; ; ; ; ; ; ;Favali, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Beranzoli, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;D'Anna, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Gasparoni, F.; Tecnomare-ENI S.p.A., Venezia (Italy) ;Marvaldi, J.; IFREMER, Brest (France) ;Clauss, G.; Technische Universität Berlin (Germany) ;Gerber, H. W.; TFH Berlin – University of Applied Sciences, Berlin, Germany ;Nicot, M.; SERCEL-Underwater Acoustic Division (former ORCA Instrumentation), Brest (France) ;Marani, M. P.; Istituto di Scienze Marine-CNR, Sezione di Geologia Marina, Bologna (Italy) ;Gamberi, F.; Istituto di Scienze Marine-CNR, Sezione di Geologia Marina, Bologna (Italy) ;Millot, C.; Laboratoire d’Océanographie et de Biogéochimie-CNRS, Marseille (France) ;Flueh, E. R.; IFM-GEOMAR, Kiel (Germany); ; ; ; ; ; ; ; ; ; ; Seafloor long-term, multiparameter, single-frame observatories have been developed within the framework of European Commission and Italian projects since 1995. A fleet of five seafloor observatories, built-up starting from 1995 within the framework of an effective synergy among research institutes and industries, have carried out a series of long-term sea experiments. The observatories are able to operate from shallow waters to deep sea, down to 4,000 m w.d., and to simultaneously monitor a broad spectrum of geophysical and environmental processes, including seismicity, geomagnetic field variations, water temperature, pressure, salinity, chemistry, currents, and gas occurrence. Moreover, they can transmit data in (near)-real-time that can be integrated with those of the on-land networks. The architecture of the seafloor observatories follows the criteria of modularity, interoperability and standardisation in terms of materials, components and communication protocols. This paper describes the technical features of the observatories, their experiments and data.627 746 - PublicationRestrictedEuropean Seafloor Observatory Offers New Possibilities For Deep Sea Study(2000-02-01)
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;Beranzoli, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Braun, T.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Calcara, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Calore, D.; Tecnomare S.p.A Venezia ;Campaci, R.; Tecnomare S.p.A Venezia ;Coudeville, J-M,; ORCA instrumentations ;De Santis, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Di Mauro, D.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Etiope, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Favali, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Frugoni, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Fuda, J-L.; LOB-CNRS Marselle ;Gamberi, F.; ISMAR-CNR Bologna ;Gasparoni, F.; Tecnomare S.p.A Venezia ;Gerber, H.; TFH Berlin ;Marani, M.; ISMAR-CNR Bologna ;Marvaldi, J.; IFREMER ;Millot, C.; LOB-CNRS Marselle ;Montuori, C.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Romeo, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Palangio, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Smriglio, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; The Geophysical and Oceanographic Station for Abyssal Research (GEOSTAR), an autonomous seafloor observatory that collects measurements benefiting a number of disciplines during missions up to 1 year long, will begin the second phase of its first mission in 2000. The 6-8 month investigation will take place at a depth of 3400 m in the southern Tyrrhenian basin of the southern Tyrrhenian basin of the central Mediterranean. GEOSTAR was funded by the European Community (EC) for $2.4 million (U.S. dollars) in 1995 as a part of the Marine Science and Technology programme (MAST). The innovative deployment and recovery procedure GEOSTAR uses was derived from the "two-module" concept successfully applied by NASA in the Apollo and space shuttle missions, where one module performs tasks for the other, including deployment, switching on and off, performing checks and recovery. The observatory communication system, which takes advantage of satellite telemetry, and the simultaneous acquisition of a set of various measurements with a unique time reference make GEOSTAR the first fundamental element of a multiparameter ocean network. GEOSTAR's first scientific and technological mission, which took place in the summer of 1998 in the Adriatic Sea, verified the performance and reliability of the system. The mission was a success. providing 440 hours of continuous seismic magnetic and oceanographic data. Thje second phase of the mission, which was funded by the EC for $2 million (US dollars), will carry equipment for chemical, biological and isotopic analyses not used in the first phase, which will broaden the data collection effort.530 46