scholarly journals Wind Direction Data from a Coastal HF Radar System in the Gulf of Naples (Central Mediterranean Sea)

2021 ◽  
Vol 13 (7) ◽  
pp. 1333
Author(s):  
Simona Saviano ◽  
Giovanni Esposito ◽  
Roberta Di Lemma ◽  
Paola de Ruggiero ◽  
Enrico Zambianchi ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Wind Direction ◽  
Radar System ◽  
Hf Radar ◽  
Small Scale ◽  
Winter Period ◽  
Tyrrhenian Sea ◽  
Central Mediterranean ◽  
Gulf Of Naples ◽  
Central Mediterranean Sea

Results on the accuracy of SeaSonde High Frequency (HF) radar wind direction measurements in the Gulf of Naples (Southern Tyrrhenian Sea, Central Mediterranean Sea) are here presented. The investigation was carried out for a winter period (2th February–6th March) and for one summer month (August) of the reference year 2009. HF radar measurements were compared with in situ recordings from a weather station and with model data, with the aim of resolving both small scale and large scale dynamics. The analysis of the overall performance of the HF radar system in the Gulf of Naples shows that the data are reliable when the wind speed exceeds a 5 m/s threshold. Despite such a limitation, this study confirms the potentialities of these systems as monitoring platforms in coastal areas and suggests further efforts towards their improvement.

Genetic structure of gilthead seabream, Sparus aurata, in the Central Mediterranean Sea

2006 ◽  
Vol 1 (4) ◽  
pp. 636-647 ◽  
Author(s):  
Anna Rossi ◽  
Eleonora Perrone ◽  
Luciana Sola
Keyword(s):  
Genetic Structure ◽  
Mediterranean Sea ◽  
Sparus Aurata ◽  
Isolation By Distance ◽  
Population Subdivision ◽  
Gilthead Seabream ◽  
Tyrrhenian Sea ◽  
Central Mediterranean ◽  
Economic Resource ◽  
Central Mediterranean Sea

AbstractThe gilthead seabream, Sparus aurata, represents an important economic resource for Mediterranean aquaculture. In spite of its wide geographic distribution and economic importance, only recently studies have been carried out on the genetic composition of natural populations, which have revealed a picture of a heterogeneous degree of genetic differentiation among S. aurata populations. In this study an allozyme analysis of samples from six different collecting sites along the Italian and Croatian coasts was carried out, covering an area in the Central Mediterranean sea that has yet to be investigated through gene-enzyme systems. Data on 26 gene loci, 10 of which are polymorphic, indicate a slight but significant genetic structure (FST = 0.0167) of the species. A hierarchical analysis of population subdivision made it possible to identify three different assemblages found in the Adriatic Sea, Tyrrhenian Sea and Sardinian Channel, though an isolation by distance model can be rejected. The results are discussed in the light of previous literature and taking conservation into consideration.

scholarly journals Particulate biogenic barium tracer of mesopelagic carbon remineralization in the Mediterranean Sea (PEACETIME project)

2021 ◽  
Vol 18 (22) ◽  
pp. 5891-5902
Author(s):  
Stéphanie H. M. Jacquet ◽  
Christian Tamburini ◽  
Marc Garel ◽  
Aurélie Dufour ◽  
France Van Vambeke ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Deep Convection ◽  
Western Mediterranean ◽  
Late Spring ◽  
Small Scale ◽  
Dust Deposition ◽  
Central Mediterranean ◽  
Central Mediterranean Sea ◽  
The Mediterranean ◽  
The Impact

Abstract. We report on the sub-basin variability in particulate organic carbon (POC) remineralization in the western and central Mediterranean Sea in late spring during the PEACETIME (ProcEss studies at the Air–sEa Interface after dust deposition in the MEditerranean sea) cruise. POC remineralization rates were estimated using the excess biogenic particulate barium (Baxs) inventories in the mesopelagic layers (100–1000 m depth) and compared with prokaryotic heterotrophic production (PHP). Baxs-based mesopelagic remineralization rates (MRs) ranged from 25±2 to 306±70 mgCm-2d-1. MRs were larger in the Algero-Provençal (ALG) Basin than in the Tyrrhenian (TYR) and Ionian (ION) basins. Our Baxs inventories and integrated PHP data also indicated that significant mesopelagic remineralization occurred down to 1000 m depth in the ALG Basin in contrast to the ION and TYR basins, where remineralization was mainly located above 500 m depth. We propose that the higher and deeper MRs in the ALG Basin were sustained by an additional particle export event driven by deep convection. The TYR Basin (in contrast to the ALG and ION basins) presented the impact of a previous dust event, as reflected by our particulate Al water column concentrations. The ION and TYR basins showed small-scale heterogeneity in remineralization processes, reflected by our Baxs inventories and integrated PHP data at the Tyrr long-duration station. This heterogeneity was linked to the mosaic of blooming and non-blooming patches reported in this area during the cruise. In contrast to the western Mediterranean Sea (ALG Basin), the central Mediterranean Sea (ION and TYR basins) showed lower remineralization rates restricted to the upper mesopelagic layer during the late spring PEACETIME cruise.

scholarly journals Polychlorinated biphenyls and organochlorine pesticides in water and sediment from Volturno River, Southern Italy: occurrence, distribution and risk assessment

2020 ◽  
Vol 32 (1) ◽  
Author(s):  
Paolo Montuori ◽  
Elvira De Rosa ◽  
Pasquale Sarnacchiaro ◽  
Fabiana Di Duca ◽  
Donatella Paola Provvisiero ◽  
...  
Keyword(s):  
Polychlorinated Biphenyls ◽  
Mediterranean Sea ◽  
Organochlorine Pesticides ◽  
Risk Index ◽  
Sediment Quality ◽  
Tyrrhenian Sea ◽  
Central Mediterranean ◽  
Sediment Samples ◽  
Central Mediterranean Sea ◽  
Volturno River

Abstract Background To assess the Volturno River pollution and its environmental impact on the Tyrrhenian Sea (Central Mediterranean Sea) caused by Polychlorinated biphenyls (PCBs) and Organochlorine pesticides (OCPs), 32 PCBs and aldrin, α-BHC, β-BHC, δ-BHC, γ-BHC (lindane), 4,4′- DDD, 4,4′-DDE, 4,4′-DDT, dieldrin, endosulfan I, endosulfan II, endosulfan sulphate, endrin, heptachlor, heptachlor epoxide (isomer B) and methoxychlor have been selected and were analyzed in three different phases: dissolved phase (DP), suspended particulate matter (SPM) and sediments. PCBs and OCPs were extracted using an SPE column for the DP and glass fiber filter for SPM and sediment samples. Cleaned extracts were analyzed by gas chromatography with electron capture detector (ECD) and mass spectrometry (MS) detector for PCBs and OCPs, respectively. Results Pollutants discharges of PCBs and OCPs into the sea were calculated in about 106.9 kg year−1 (87.1 kg year−1 of PCBs and 19.7 kg year−1 of OCPs), showing that this river could be a major source of PCBs and OCPs pollution to the Central Mediterranean Sea. Total concentrations of PCBs ranged from 4.1 to 48.0 ng L−1 in water (sum of DP and SPM) and from 4.3 to 64.3 ng g−1 in sediment samples. The concentrations of total organochlorine pesticides (OCPs) obtained in water (sum of DP and SPM) ranged from 0.93 to 8.66 ng L−1 and from 0.52 to 9.89 ng g−1 in sediment samples. Principal component analysis shows that all PCB compounds are more likely to come from surface runoff than an atmospheric deposition. Conclusion The data show that higher levels of PCBs and OCPs were found in sediment samples than in DP and SPM samples, which are an indication of no fresh inputs of these compounds. Based on our results, unintentionally produced PCBs by industrial processes (and other processes) were considered to be the main sources of PCBs in Volturno River and Estuary sediments. Considering the Sediment Quality Guidelines (SQGs), the Ecological Risk Index (ERI), the Risk Quotient (RQ) and the USEPA Environmental Quality Standards (EQS), the Volturno River and its Estuary would be considered an area in which the integrity is possibly at risk.

scholarly journals Calcareous nannofossil assemblages from the Central Mediterranean Sea over the last four centuries: the impact of the little ice age

2010 ◽  
Vol 6 (3) ◽  
pp. 817-866 ◽  
Author(s):  
A. Incarbona ◽  
P. Ziveri ◽  
E. Di Stefano ◽  
F. Lirer ◽  
G. Mortyn ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Little Ice Age ◽  
Ice Age ◽  
Tyrrhenian Sea ◽  
Calcareous Nannofossil ◽  
Central Mediterranean ◽  
Decadal Scale ◽  
Central Mediterranean Sea ◽  
Sicily Channel ◽  
The Impact

Abstract. We present decadal-scale calcareous nannofossil data from four short cores (Station 272, 37° 17' N, 12° 48' E, 226 m depth; St 342, 36° 42' N, 13° 55' E, 858.2 m depth; St 407, 36° 23' N, 14° 27' E, 345.4 m depth; C90-1M, 40° 36' N, 14° 42' E, 103.4 m depth) recovered in the central Mediterranean Sea (northern Sicily Channel and Tyrrhenian Sea), which, on the basis of 210Pb activity span the last 200–350 years. Assemblages are dominated by placoliths, mostly Emiliania huxleyi, while, at least in the Sicily Channel sediments, Florisphaera profunda was an important part of the coccolithophore community. The paleoenvironmental reconstruction, based on ecological preference of species and groups, suggests that the Tyrrhenian core C90-1M maintained higher productivity levels over recent centuries, with respect to the Sicily Channel sites, possibly because of more pronounced winter phytoplankton blooms, in agreement with modern primary productivity variations over the last ten years. The lowermost part of the record of one of the cores from the Sicily Channel, Station 407, which extends down to 1650 AD, is characterized by drastic changes in productivity. Specifically, below 1850 AD, the decrease in abundance of F. profunda and the increase of placoliths, suggest increased productivity. The chronology of this change is related to the main phase of the Little Ice Age, which might have impacted the hydrography of the southern coast of Sicily and promoted vertical mixing in the water column. The comparison with climatic forcings points out the importance of stronger and prolonged northerlies, together with decreased solar irradiance. The identification of the LIA in the northern Sicily Channel cover the Bond cycle BO that was missing in a previous study of Holocene climatic anomalies in the Sicily Channel. Finally, we suggest that major abundance changes in reworked nannofossil specimens, recorded in the Tyrrhenian core C90-1M, might be linked to variations in terrigenous supply from land. Paradoxically, higher amounts of reworking correspond to dry periods. We argue that soil and rock vulnerability is enhanced during times of prolonged drought and vegetation cover loss.

scholarly journals Haliotis mykonosensis Owen, Hanavan & Hall, 2001 in the Procida Island (Gulf of Naples) and in the Central Mediterranean Sea, with notes on the Mediterranean HALIOTIDAE

2009 ◽  
Vol 10 (2) ◽  
pp. 139
Author(s):  
F. CROCETTA ◽  
S. RISMONDO
Keyword(s):  
Mediterranean Sea ◽  
Original Description ◽  
Central Mediterranean ◽  
Gulf Of Naples ◽  
Real Distribution ◽  
Central Mediterranean Sea ◽  
Northern Side ◽  
The Mediterranean

Seventeen living specimens of Haliotis mykonosensis Owen, Hanavan & Hall, 2001 are reported from the area between the wharf of Sancio Cattolico and Punta di Pioppeto (northern side of Procida Island, Naples) and twenty-six from further Central Mediterranean localities. The species was known up to now from the original description only and this note contributes to a better understanding of its real distribution in the Mediterranean Sea.

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