scholarly journals Bioclastic Deposits in the NW Gulf of Naples (Southern Tyrrhenian Sea, Italy): A Focus on New Sedimentological and Stratigraphic Data around the Island of Ischia

2020 ◽  
Author(s):  
Gemma Aiello
Keyword(s):  
Posidonia Oceanica ◽  
Coarse Grained ◽  
Tyrrhenian Sea ◽  
Gulf Of Naples ◽  
Sea Bottom ◽  
Southern Tyrrhenian Sea ◽  
Marine Areas ◽  
Rearrangement Processes ◽  
Water Depths

Bioclastic deposits in the Gulf of Naples have been studied and compared based on new sedimentological and stratigraphic data, particularly referring to the rhodolith layers. They represent detrital facies deriving mainly from in situ rearrangement processes of organogenic material on rocky sea bottoms. These deposits are composed of medium-coarse-grained sands and bioclastic gravels in a scarce pelitic matrix and crop out at the sea bottom in a portion of the inner shelf located at water depths between −20 m and −50 m. Below water depths of −30 m the bioclastic deposits are rhodolith, characterized by gravels and lithoclastic sands. Rhodolith deposits are often found near the Posidonia oceanica meadows and/or in protected areas near the rocky outcrops. The Ischia Bank represents an excellent natural laboratory for studying the rhodolith layers. On the Ischia Bank, below the Posidonia oceanica meadow, both bioclastic sands immersed in a muddy matrix and volcaniclastic gravels were sampled. Both the Mollusk shells and the volcaniclastic fragments, where the contribution of the silty and sandy fractions is lower than 20%, were colonized by some species of red algae, while in the marine areas with a low gradient a maërl facies was deposited.

scholarly journals Results of the first Wave Glider experiment in the southern Tyrrhenian Sea

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Giuseppe Aulicino ◽  
Yuri Cotroneo ◽  
Teodosio Lacava ◽  
Giancanio Sileo ◽  
Giannetta Fusco ◽  
...  
Keyword(s):  
Optical Properties ◽  
Autonomous Vehicle ◽  
Sea Surface ◽  
Preliminary Evaluation ◽  
Tyrrhenian Sea ◽  
Surface Parameters ◽  
Spatial And Temporal Scales ◽  
Gulf Of Naples ◽  
Southern Tyrrhenian Sea ◽  
Wave Glider

<p>A wave-propelled autonomous vehicle (Wave Glider) instrumented with a variety of oceanographic and meteorological sensors was launched from Gulf of Naples on the 12<sup>th </sup>of September 2012 for a two-week mission in the Southern Tyrrhenian Sea. The main objective of the mission was a preliminary evaluation of the potential of commercial autonomous platforms to provide reliable measurements of sea surface parameters which can complement existing satellite based products moving from the local to the synoptic scale. To this aim Wave Glider measurements were compared to equivalent, or near-equivalent, satellite products achieved from MODIS (Moderate Resolution Imaging Spectroradiometer) sensors onboard the EOS (Earth Observing System) satellite platforms and from AVISO (Archiving Validation and Interpretation of Satellite Oceanographic Data). Level-3 near real time and Level-4 reprocessed sea surface foundation temperature products provided by the CMEMS (Copernicus Marine Environment Monitoring Service) were also included in this study as well as high resolution model output supplied by NEMO (Nucleus for European Modelling of the Ocean). The Wave Glider was equipped with sensors to measure temperature, salinity, currents, as well as Colored Dissolved Organic Matter (CDOM), turbidity and refined fuels fluorescence. The achieved results confirmed the emerging value of Wave Gliders in the framework of multiplatform monitoring systems of the ocean surface parameters. In particular, they showed that Wave Glider measurements captured the southern Tyrrhenian Sea major surface oceanographic features, including the coast to open sea haline gradient and the presence of a cyclone-anticyclone system in the southeastern sub-region. The Wave Glider also had the capability to monitor upper ocean currents at finer spatial and temporal scales than satellite altimetric observations and model outputs. Nonetheless, results stressed the existence of several limits in the combined use of satellite and Wave Glider observations and the necessity of further analyses concerning the monitoring of the ocean optical properties. In fact, Wave Glider and satellite-based products agree in terms of sea surface temperature and currents patterns, while bio-optical properties turned out to be less well correlated. No significant traces of refined fuels have been detected along the WG track.</p>

scholarly journals Gravity instabilities in the Dohrn Canyon (Bay of Naples, Southern Tyrrhenian Sea): potential wave and run-up (tsunami) reconstruction from a fossil submarine landslide

2011 ◽  
Vol 62 (1) ◽  
pp. 55-63 ◽  
Author(s):  
Vincenzo di Fiore ◽  
Gemma Aiello ◽  
Bruno D'Argenio
Keyword(s):  
Submarine Landslide ◽  
Tyrrhenian Sea ◽  
Submarine Landslides ◽  
Recent Past ◽  
Sea Floor ◽  
Potential Wave ◽  
Phlegrean Fields ◽  
Sea Bottom ◽  
Southern Tyrrhenian Sea ◽  
Run Up

Gravity instabilities in the Dohrn Canyon (Bay of Naples, Southern Tyrrhenian Sea): potential wave and run-up (tsunami) reconstruction from a fossil submarine landslideWe discuss a mathematical model for wave and run-up generated submarine landslides in the canyons of the Bay of Naples (Magnaghi-Dohrn canyon system). The morpho-bathymetry and submarine gravity instabilities of such incisions have been investigated through the interpretation of a high resolution DEM. The canyons are located in a sector of the bay where there is a variable interaction of volcanic activity (Phlegrean Fields and Ischia and Procida Islands) with sedimentary processes due to the Sarno-Sebeto rivers. At present the Naples canyon-system is inactive, as is shown by the Holocene sedimentary drapes deposited during the present sea-level highstand, but gravity instabilities occurred in the recent past at the canyons' heads. In particular the Dohrn Canyon is characterized by a double regressive head, while the Magnaghi Canyon shows a trilobate head, formed by the junction of three main tributary channels and coincident with the retreat of the shelf break around the 140 m isobath. The results of a simulation of failures in the above source areas show that the amplitude of wave run-up, expressed in terms of the sea floor depth percentage, may range up to 2.5 % of the water depth at the sea bottom.

scholarly journals Syntopic Cystoseira taxa support different molluscan assemblages in the Gulf of Naples (southern Tyrrhenian Sea)

2019 ◽  
Vol 70 (11) ◽  
pp. 1561 ◽  
Author(s):  
Antonia Chiarore ◽  
Iacopo Bertocci ◽  
Sara Fioretti ◽  
Angela Meccariello ◽  
Giuseppe Saccone ◽  
...  
Keyword(s):  
Benthic Fauna ◽  
Shannon Index ◽  
Tyrrhenian Sea ◽  
Brown Macroalgae ◽  
Gulf Of Naples ◽  
Invertebrate Biodiversity ◽  
Southern Tyrrhenian Sea ◽  
Species Specific ◽  
June July ◽  
Shed Light

Brown macroalgae belonging to the genus Cystoseira (Fucales: Sargassaceae) are canopy-forming organisms the recent decline of which at a basin and local scale has been widely documented, which urgently calls for research to fill knowledge gaps and support new and effective measures for protection. We, hereby, characterised the molluscan assemblages associated with three Cystoseira taxa (C. amentacea, C. compressa and C. crinita) from Ischia Island (Italy, Tyrrhenian Sea), and tested whether different congeneric taxa may syntopically support a different biota. In particular, these assemblages were compared among three Cystoseira species, between two times of sampling (June–July 2015 and June–July 2016), and among six sites in terms of multivariate structure (identity and relative abundances of constituting taxa combined, and presence–absence composition), as well as for synthetic measures of diversity, including the total richness of taxa, the exponential Shannon index and the reciprocal Simpson index. In total, 24736 molluscan individuals were collected, overall belonging to 52 taxa. The majority of the identified species included micrograzers and filter feeders, which is in agreement with similar previous studies. The composition of associated molluscan assemblages, which was mainly represented by juvenile individuals, differed among the three Cystoseira species, suggesting that even congeneric taxa do not support an analogous benthic fauna. The present findings have shed light on the molluscan biota associated with Cystoseira taxa in the Gulf of Naples and strengthened the importance of such habitat-forming macroalgae in structuring the local infralittoral invertebrate biodiversity and as a nursery for species-specific associated molluscs.

Multiplatform observation of the surface circulation in the Gulf of Naples (Southern Tyrrhenian Sea)

2011 ◽  
Vol 61 (6) ◽  
pp. 779-796 ◽  
Author(s):  
Marco Uttieri ◽  
Daniela Cianelli ◽  
Bruno Buongiorno Nardelli ◽  
Berardino Buonocore ◽  
Pierpaolo Falco ◽  
...  
Keyword(s):  
Tyrrhenian Sea ◽  
Gulf Of Naples ◽  
Surface Circulation ◽  
Southern Tyrrhenian Sea

Polychlorinated Biphenyls and Organochlorine Pesticides in Seafood from the Gulf of Naples (Italy)

2007 ◽  
Vol 70 (3) ◽  
pp. 706-715 ◽  
Author(s):  
MARIA CARMELA FERRANTE ◽  
TERESA CIRILLO ◽  
BARBARA NASO ◽  
MARIA TERESA CLAUSI ◽  
ANTONIA LUCISANO ◽  
...  
Keyword(s):  
Polychlorinated Biphenyls ◽  
Organochlorine Pesticides ◽  
Health Hazard ◽  
Marine Species ◽  
Tyrrhenian Sea ◽  
The European Union ◽  
Atlantic Mackerel ◽  
Gulf Of Naples ◽  
Mediterranean Mussel ◽  
Southern Tyrrhenian Sea

Seven target polychlorinated biphenyls (PCBs; IUPAC nos. 28, 52, 101, 118, 138, 153, and 180) and the organochlorine pesticides (OCPs) hexachlorobenzene (HCB) and dichlorodiphenyltrichloroethane (DDT) and its related metabolites (p,p′-DDT, p,p′-DDE, and p,p′-DDD) were quantified in edible tissues from seven marine species (European hake, red mullet, blue whiting, Atlantic mackerel, blue and red shrimp, European flying squid, and Mediterranean mussel) from the Gulf of Naples in the southern Tyrrhenian Sea (Italy). PCBs 118, 138, and 153 were the dominant congeners in all the species examined. The concentrations of all PCBs (from not detectable to 15,427 ng g−1 fat weight) exceeded those of all the DDTs (from not detectable to 1,769 ng g−1 fat weight) and HCB (not detectable to 150.60 ng g−1 fat weight) in the samples analyzed. The OCP concentrations were below the maximum residue limits established for fish and aquatic products by the Decreto Minis-terale 13 May 2005 in all the samples analyzed; therefore the OCPs in the southern Tyrrhenian Sea species are unlikely to be a significant health hazard. Conversely, the mean concentrations of PCBs exceeded (greatly in some cases) the current limits (200 ng−1 fat weight) set by the European Union for terrestrial foods. Although the manufacture and use of PCBs are banned or highly restricted, these compounds still are important persistent chemical contaminants in the Gulf of Naples.

scholarly journals From Siliciclastic to Bioclastic Deposits in the Gulf of Naples: New Highlights from Offshore Ischia and Procida–Pozzuoli Based on Sedimentological and Seismo-Stratigraphic Data

Quaternary ◽  
2021 ◽  
Vol 4 (4) ◽  
pp. 44
Author(s):  
Gemma Aiello ◽  
Mauro Caccavale
Keyword(s):  
Tyrrhenian Sea ◽  
Dense Network ◽  
Seismic Profiles ◽  
Seafloor Topography ◽  
Gulf Of Naples ◽  
Sea Bottom ◽  
Ischia Island ◽  
Depositional Systems ◽  
Pontine Islands ◽  
Seismic Lines

This study discusses the siliciclastic to bioclastic deposits (in particular, the rhodolith deposits) in the Gulf of Naples based on sedimentological and seismo-stratigraphic data. The selected areas are offshore Ischia Island (offshore Casamicciola, Ischia Channel), where a dense network of sea-bottom samples has been collected, coupled with Sparker Multi-tip seismic lines, and offshore Procida–Pozzuoli (Procida Channel), where sea-bottom samples are available, in addition to Sparker seismic profiles. The basic methods applied in this research include sedimentological analysis, processing sedimentological data, and assessing seismo-stratigraphic criteria and techniques. In the Gulf of Naples, and particularly offshore Ischia, bioclastic sedimentation has been controlled by seafloor topography coupled with the oceanographic setting. Wide seismo-stratigraphic units include the bioclastic deposits in their uppermost part. Offshore Procida–Pozzuoli, siliciclastic deposits appear to prevail, coupled with pyroclastic units, and no significant bioclastic or rhodolith deposits have been outlined based on sedimentological and seismo-stratigraphic data. The occurrence of mixed siliciclastic–carbonate depositional systems is highlighted in this section of the Gulf of Naples based on the obtained results, which can be compared with similar systems recognized in the central Tyrrhenian Sea (Pontine Islands).

scholarly journals Characteristics and coastal effects of a destructive marine storm in the Gulf of Naples (southern Italy)

2021 ◽  
Vol 21 (12) ◽  
pp. 3809-3825
Author(s):  
Gaia Mattei ◽  
Diana Di Luccio ◽  
Guido Benassai ◽  
Giorgio Anfuso ◽  
Giorgio Budillon ◽  
...  
Keyword(s):  
Coastal Area ◽  
Coupled Model ◽  
Economic Loss ◽  
Tyrrhenian Sea ◽  
Threshold Values ◽  
Gulf Of Naples ◽  
In Situ Data ◽  
Italian Coasts ◽  
Wind Intensity

Abstract. Destructive marine storms bring large waves and unusually high surges of water to coastal areas, resulting in significant damages and economic loss. This study analyses the characteristics of a destructive marine storm on the strongly inhabited coastal area of Gulf of Naples, along the Italian coasts of the Tyrrhenian Sea. This is highly vulnerable to marine storms due to the accelerated relative sea level rise trend and the increased anthropogenic impact on the coastal area. The marine storm, which occurred on 28 December 2020, was analyzed through an unstructured wind–wave coupled model that takes into account the main marine weather components of the coastal setup. The model, validated with in situ data, allowed the establishment of threshold values for the most significant marine and atmospheric parameters (i.e., wind intensity and duration) beyond which an event can produce destructive effects. Finally, a first assessment of the return period of this event was evaluated using local press reports on damage to urban furniture and port infrastructures.

scholarly journals Characteristics and coastal effects of a destructive marine storm in the Gulf of Naples (Southern Italy)

2021 ◽  
Author(s):  
Gaia Mattei ◽  
Diana Di Luccio ◽  
Guido Benassai ◽  
Giorgio Anfuso ◽  
Giorgio Budillon ◽  
...  
Keyword(s):  
Coastal Area ◽  
Coupled Model ◽  
Economic Loss ◽  
Tyrrhenian Sea ◽  
Threshold Values ◽  
Gulf Of Naples ◽  
In Situ Data ◽  
Italian Coasts ◽  
Wind Intensity

Abstract. Destructive marine storm bring large waves and unusually high surges of water to coastal areas, resulting in significant damages and economic loss. In this study it is examined the characteristics of a destructive marine storm on the strongly inhabited coastal area of Naples Gulf, along the Italian coasts of the Tyrrhenian Sea, which is highly vulnerable to marine storms due to the accelerated relative sea level rise trend and the increased anthropogenic impact on the coastal area. The marine storm, occurred on the 28th December 2020, was analysed through an unstructured wind-wave coupled model that takes into account the main weather-marine components of the coastal setup. The model, validated with in-situ data allowed to establish threshold values for the most significant marine and atmospheric parameters (i.e., wind intensity and duration) beyond which an event can produce destructive effects. Finally, a first assessment of the return period of this event was evaluated using local press reports on damage on urban furniture and port infrastructures.

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