ionian sea
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2022 ◽  
pp. 29-40
Author(s):  
Nena Galanidou ◽  
Maria Gatsi ◽  
Olympia Vikatou ◽  
Antonis Vasilakis ◽  
Catherine Morgan ◽  
...  
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2022 ◽  
pp. 93-104
Author(s):  
Gert Jan Van Wijngaarden ◽  
Ayla Krijnen ◽  
Nienke Pieters ◽  
Corien Wiersma

2021 ◽  
Vol 18 (24) ◽  
pp. 6377-6392
Author(s):  
Léo Berline ◽  
Andrea Michelangelo Doglioli ◽  
Anne Petrenko ◽  
Stéphanie Barrillon ◽  
Boris Espinasse ◽  
...  

Abstract. Together with T–S properties, particle abundance in situ measurements are useful to discriminate water masses and derive circulation patterns. In the upper layers of the Ionian Sea, the fresher Atlantic Waters (AW) recently crossing the Sicily Channel meet the resident and saltier AW, which circulated cyclonically in the eastern basin and modified after evaporation and eventually cooling. In May 2017, during the PEACETIME cruise, fluorescence and particle abundance sampled at high resolution revealed unexpected heterogeneity in the central Ionian Sea. Surface salinity measurements, together with altimetry-derived and hull-mounted acoustic Doppler current profiler (ADCP) currents, describe a zonal pathway of AW entering the Ionian Sea, consistent with the so-called cyclonic mode in the North Ionian Gyre. The ION-Tr transect, located between 19–20∘ E at approximately 36∘ N, turned out to be at the crossroads of three water masses, mostly coming from the west, north and an isolated anticyclonic eddy northeast of ION-Tr. Using Lagrangian numerical simulations, we suggest that the contrast in particle loads along ION-Tr originates from particles transported from these three different water masses. Waters from the west, identified as AW carried by a strong southwestward jet, were moderate in particle load, probably originating from the Sicily Channel. The water mass from the north, carrying abundant particles, probably originated in the northern Ionian Sea, or further away from the south Adriatic Sea. Waters from the eddy, depleted in particles and chl a, may originate from south of the Peloponnese, where the Pelops eddy forms. The central Ionian Sea hence appears as a mosaic area, where waters of contrasted biological history meet. This contrast is particularly clear in spring, when blooming and non-blooming areas co-occur. Interpreting the complex dynamics of physical–biogeochemical coupling from discrete measurements made at isolated stations at sea is a challenge. The combination of multiparametric in situ measurements at high resolution with remote sensing and Lagrangian modeling appears as one adequate way to address this challenge.


2021 ◽  
Vol 30 (1) ◽  
pp. 283-294
Author(s):  
Marina Mancini

In 2020 Greece and Italy concluded a maritime delimitation agreement, extending the already-established boundary line between their respective continental shelf areas to the other maritime areas to which they are entitled under international law. The Greek authorities hailed the agreement as a great success, stressing that it fully reflects their position vis-à-vis maritime delimitation in the Mediterranean and it meets their national interests in the Ionian Sea. This article critically analyzes the agreement, in the light of various recent events, and it finds that it serves Italian interests too. In particular, the 2020 Italo-Greek agreement furthers Italy’s growing interest in delimiting the maritime zones to which it is entitled under international law, so as to prevent its rights and jurisdiction over them being impaired by the proclamation of overlapping zones by its neighbours. It also sets the stage for future proclamation by Italy of an EEZ covering the waters adjacent to its territorial sea in the Ionian Sea.


2021 ◽  
Vol 64 (Vol. 64 (2021)) ◽  
Author(s):  
Tiziana Sgroi ◽  
Graziella Barberi ◽  
Alessandro Marchetti

The Western Ionian Sea is characterised by an active and diffuse seismicity, directly related to the convergence of the European and African Plates and by gravitational sinking and rollback of the  oceanic lithosphere. In this area, the location of earthquakes is characterised by considerable uncertainties due to large azimuthal gaps, resulting in notable location errors. This problem was  partially overcome with the use of data recorded by NEMO-SN1 seafloor observatory (October 2002 February 2003; June 2012 - May 2013). We relocated 1130 crustal and sub-crustal earthquakes  using land network and NEMO-SN1 data. As most events occurred on Mt. Etna, we focused on 358  earthquakes in the offshore area and near the coasts of Sicily and Calabria. The use of the combined  land-marine networks has improved the earthquake locations in terms of azimuthal GAP, as well as  in horizontal and vertical errors. The comparison between locations performed with and without NEMO-SN1 data shows that differences in latitude, longitude and depths are more evident in the Western Ionian Sea and in the coast of Sicily, where values of the differences over 5 km correspond  to structural heterogeneities. The increased number of seismic stations deployed on land from 2003  to 2012 did not influence the location of events occurring offshore, where NEMO-SN1 continued to be the distinctive tool in the location process. Moreover, the new 73 focal mechanisms computed with  P-wave polarities from NEMO-SN1 and land stations are in agreement with the regional structural   model, showing a prevalent normal, normal/oblique, and strike-slip kinematics. The similarity of two   new focal solutions with the mechanisms of the main shock and aftershock of the 1990 earthquake  demonstrates that the seismic structures are still active and potentially dangerous. The P-wave travel- time residual analysis confirms the activity along the main structural alignments.  A single point of observation in the Ionian Sea can significantly improve the quality of locations, giving an opportunity to focus on the seismogenic structures responsible for the occurrence of  medium-to-high magnitude earthquakes.


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