Giovanni Bortoluzzi, Federico Giglio, Marco Ligi, Fabrizio Del Bianco, Valentina Ferrante, Luca Gasperini, Mariangela Ravaioli
One of the most intriguing feature along the entire Adriatic coast is the bay of Boka Kotorska, where the sea enters inland for over 20 km. The Bay is located along the Montenegro margin and is part of a ria coastal system surrounded by high mountains that are part of the Dinaric range. The Bay is composed by three major basins, connected by two narrow straits with a maximum depth of 67 m. Despite its historical and geostrategic role the morphology and geology of the Bay is poorly known. New high resolution multibeam and seismic reflection data reveal unknown details of present-day...
1st IMEKO TC19 Workshop on Metrology for the Sea
· TC19
· 2017
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Passaro S.
Here we show a tool for the auto-cleaning of Digital Terrain Models (DTM) from spikes. This tool basically fits the contiguity of well developed depth measurements in a regularly spaced DTM, that helps to individuate and remove spikes from survey records. The method consist in a recursive approach in which a bathymetric grid is generated starting from very large cell size values (e.g., about ten times the grid cell size of the final product) and then compared with the vertical distance between each measurement and the filtered DTM (residuals). Finally, a threshold value is opportunely chosen...
1st IMEKO TC19 Workshop on Metrology for the Sea
· TC19
· 2017
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Passaro S., Ventura G.
The widespread, increasing availability of high-resolution multibeam swath bathymetric data in the last years provides an opportunity to study with unprecedented detail the seafloor morphology throughout the use of morphometric parameters. These are characterized by factors that help to highlight local or general properties of the seafloor both in coastal and deep marine environment as well as in volcanic and non-volcanic settings. Here, we show some tools used over the last ten years, either new or readjusted from previously existing, which helpe to improve the interpretation and emphasize...
1st IMEKO TC19 Workshop on Metrology for the Sea
· TC19
· 2017
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Daniele Casalbore
Multibeam bathymetry has deeply changed our vision of the seafloor, allowing to map a large suite of landforms associated to oceanographic, sedimentary, volcanic and tectonic processes. Besides the advances in understanding the processes shaping the seafloor, these data represent a basic input both for a first assessment of marine geohazards and for planning more detailed studies. In this regard, the use of repeated bathymetric surveys in geologically-active areas is becoming a fundamental tool to evidence and monitor areas affected by rapid seafloor variations, whose genesis can be linked...
1st IMEKO TC19 Workshop on Metrology for the Sea
· TC19
· 2017
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C. García Izquierdo, A. Garcia-Benadí, P. Corredera, D. del Campo, S. Hernandez, J. del Río Fernandez, M. Nogueres-Cervera, C. Pulido de Torres
In the framework of the EMRP project “ENV 58. Metrology for essential climate variables”, a new technique to perform traceable temperature measurements of the sea water column and sea water surface was designed and it is being studied and applied to real situation in the submarine observatory (www.obsea.es). This new technique is based on optical fiber Bragg gratings, which implies the distribution of temperature sensors along the fiber. In the design of these distributed thermometers special attention was paid to the involved materials in order to avoid the damages of such corrosive...
1st IMEKO TC19 Workshop on Metrology for the Sea
· TC19
· 2017
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Frank Bastkowski, Beatrice Sander, Steffen Seitz, Jens Daniel Müller
Assessment of seawater acidification can be achieved by the measurement of pH. A prerequisite for reliable and comparable pH values is traceability of pH measurement results to an agreed higher order pH standard. While this has already been established for low ionic strength aqueous solutions, traceability of pH measurement results for high ionic strength solutions is about to be realized for artificial seawater samples in the middle salinity range (5-20) on the so called total pH scale (pHT). In the present work we show details of the pHT measurement procedure for the measurement of TRIS...
1st IMEKO TC19 Workshop on Metrology for the Sea
· TC19
· 2017
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Steffen Seitz
The calibration of standard seawater, the most relevant standard for worldwide Practical Salinity measurements, is based on a conductance ratio measurement of standard seawater and a defined KCl solution. The results of an interlaboratory comparison measurement of such conductance ratios are presented at various salinities (7, 19, 35) and temperatures (5, 15, 25, 35 °C). The comparison reveals a dependence of the conductance ratios on the measurement systems that is larger than the uncertainty currently assigned to Practical Salinity measurements. This jeopardizes long term continuity of...
1st IMEKO TC19 Workshop on Metrology for the Sea
· TC19
· 2017
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Maria Celia Magno, Francesco Venti, Giovanni Gaglianone, Giancarlo Pierfranceschi, Elena Romano
A total of 24 sediment samples from 5 different Italian marine sites (4 from Tyrrhenian Sea and 1 from Adriatic Sea) were analyzed for grain size using two different instruments: Laser Granulometer (LG) and X-ray Sedigraph (XS). The analysis was carried out exclusively on the fine fraction (
1st IMEKO TC19 Workshop on Metrology for the Sea
· TC19
· 2017
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Sacchi M., Matano F., Passaro S.
Campi Flegrei is an active, large (about 200 km2) volcanic complex located offshore in the northern sector of the Naples Bay. The inner, peri-calderic area is characterized by severe, non-linear ground deformation and associated displacement of manufacts (bradyseism). Here we show the results of marine geophysical surveys (multibeam swath bathymetry) and satellite observations (SAR Interferometry) aimed at the detection and measurement of the coastal horizontal and vertical displacements of segments compounding the Pozzuoli Bay, and mostly corresponding to the inner part of the Campi Flegrei...
1st IMEKO TC19 Workshop on Metrology for the Sea
· TC19
· 2017
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Elena Romano, Luisa Bergamin, Maria Celia Magno, Antonella Ausili
Sediment cores may be used to reconstruct the chronological evolution of contamination in impacted areas and deep core levels may be used as reference conditions for the assessment of environmental status. For this, it is necessary to collect undisturbed cores, in which textural and chemical characteristics of each analyzed sediment layers correspond to the environmental conditions of the deposition times. Several devices are available and, among these, vibro and gravity corers are the most used ones. In this study, chemical (Ba, Hg, PCBs and PAHs) and grain size data obtained by means of...
1st IMEKO TC19 Workshop on Metrology for the Sea
· TC19
· 2017
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