scholarly journals The May 2, 2020, Crete tsunami: comparison between registered and modelled mareograms

2021 ◽  
Vol 82 (3) ◽  
pp. 162-164
Author(s):  
Lyuba Dimova ◽  
Reneta Raykova
Keyword(s):  
Numerical Simulations ◽  
Service Providers ◽  
Eastern Mediterranean ◽  
Strong Shock ◽  
Aegean Sea ◽  
Strong Earthquakes ◽  
Tsunami Waves

The Eastern Mediterranean and Aegean Sea are susceptible to strong earthquakes and tsunami waves. On May 2, 2020 a strong shock with Mw6.6 induced tsunami that was registered in the mareographic network. The tsunami did not cause inundations, but it was the reason to enforce a tsunami alert from the Tsunami Service Providers. Our study is focused on the tsunami numerical simulations of this event and the results are compared to the registered signals in the stations NOA-03 and NOA-04 in Kasos and Ierapetra.

scholarly journals Peracarida populations of hard substrate assemblages in ports of the NW Aegean Sea (eastern Mediterranean)

2004 ◽  
Vol 58 (1) ◽  
pp. 54-61 ◽  
Author(s):  
C.-C. Chintiroglou ◽  
C. Antoniadou ◽  
A. Baxevanis ◽  
P. Damianidis ◽  
P. Karalis ◽  
...  
Keyword(s):  
Eastern Mediterranean ◽  
Aegean Sea ◽  
Hard Substrate

scholarly journals Global earthquakes in the 2020 second half according to the GS RAS

2021 ◽  
Vol 3 (1) ◽  
pp. 7-26
Author(s):  
Yuri Vinogradov ◽  
Mariya Ryzhikova ◽  
Natalia Petrov ◽  
Svetlana Poygina ◽  
Marina Kolomiets
Keyword(s):  
Seismic Energy ◽  
Aegean Sea ◽  
Focal Mechanisms ◽  
Intraplate Earthquake ◽  
Strong Earthquakes ◽  
Tatar Strait ◽  
The Earth ◽  
Deformation Processes ◽  
The Russian Federation ◽  
Deep Focus

The data on the seismicity of the Earth in the second half of 2020 at the level of strong earthquakes with magnitudes mb≥6.0 are given according to the data of the Alert Service of the Geophysical Survey RAS. The review also includes information on 54 tangible earthquakes in Russia and five earthquakes in adjacent territories that were felt in the settlements of the Russian Federation. Two of 67 strong earthquakes of the Earth with mb≥6.0 for the period under consideration were registered in the territory of Russia. For 15 strong earthquakes, the Alert Service published Information Messages within one or two days after their occurrence, for 14 earthquakes the information on focal mechanisms is provided. The strongest earthquake of the Earth with MS=7.9 occurred on July, 22 in the region of the Alaska Peninsula. The maximum human casualties and material damage during the study period were the result of the catastrophic intraplate earthquake with MS=6.8, which occurred on October, 30 in the Aegean Sea, near the Samos Island. As a result of the earthquake, 117 people died, 1054 were injured. The strongest earthquake on the territory of Russia was the deep-focus one with mb=6.4, which took place on November, 30 in the Tatar Strait, separating Sakhalin Island from continental Eurasia. The crustal Bystrinsk earthquake on September, 21 with MS=5.2, which occurred in the area of Lake Baikal, was felt with a maximum intensity I=6–7 on the territory of Russia. Comparative analysis of the rate of seismic energy released in the Globe in 2010-2020 showed that its value in the second half of 2020, as well as for 2019-2020 on average, is one of the lowest for the eleven-year period and indicates a seismic calm, which should be replaced by a period of intensification of global seismic and deformation processes

scholarly journals A three dimensional, full life cycle, anchovy and sardine model for the North Aegean Sea (Eastern Mediterranean): Validation, sensitivity and climatic scenario simulations

2021 ◽  
Vol 22 (3) ◽  
pp. 653
Author(s):  
ATHANASIOS GKANASOS ◽  
EUDOXIA SCHISMENOU ◽  
KOSTAS TSIARAS ◽  
STYLIANOS SOMARAKIS ◽  
MARIANNA GIANNOULAKI ◽  
...  
Keyword(s):  
Temperature Increase ◽  
Eastern Mediterranean ◽  
Larval Growth ◽  
Somatic Growth ◽  
Aegean Sea ◽  
Fish Growth ◽  
Prey Concentration ◽  
The North ◽  
North Aegean ◽  
North Aegean Sea

We present the development of a 3D full-lifecycle, individual-based model (IBM) for anchovy and sardine, online coupled to an existing hydrodynamic/biogeochemical low-trophic level (LTL) model for the North Aegean Sea. It was built upon an existing 1D model for the same species and area, with the addition of a horizontal movement scheme. In the model, both species evolve from the embryonic stage (egg+yolk sac larva) to the larval, juvenile, and adult stages. Somatic growth is simulated with the use of a “Wisconsin” type bioenergetics model and fish populations with an adaptation of the ‘super individuals’ (SI) approach. For the reference simulation and model calibration, in terms of fish growth and population biomass, the 2000-2010 period was selected. Interannual biomass variability of anchovy was successfully represented by the model, while the simulated biomass of sardine exhibited low variability and did not satisfactorily reproduce the observed interannual variability from acoustic surveys. The spatial distribution of both species’ biomass was in relatively good agreement with field data. Additional single-species simulations revealed that species compete for food resources. Temperature sensitivity experiments showed that both species reacted negatively to a temperature increase. Anchovy, in particular, was more affected since its spawning and larval growth periods largely overlap with the period of maximum yearly temperature and low prey concentration. Finally, simulation experiments using IPCC climatic scenarios showed that the predicted temperature increase and zooplankton concentration decrease in the future will negatively affect anchovy, resulting in sardine prevalence.

Lessepsian migrants expanding their distributional ranges; Pseudonereis anomala (Polychaeta: Nereididae) in Izmir Bay (Aegean Sea)

2005 ◽  
Vol 85 (2) ◽  
pp. 313-321 ◽  
Author(s):  
Melih Ertan Çinar ◽  
Zeki Ergen
Keyword(s):  
Shallow Water ◽  
Eastern Mediterranean ◽  
Aegean Sea ◽  
Hard Substratum ◽  
Izmir Bay ◽  
Lessepsian Migrants

A total of ten specimens of Pseudonereis anomala (Polychaeta: Nereididae) were collected on the shallow water hard substratum (0·2 m) at four stations located in the inner part of Izmir Bay (Aegean Sea, eastern Mediterranean) in January 2004. The absence of this species among the material collected previously at the same stations might suggest that it has recently become established in the area. A re-description of the species together with its ecological, reproductive, feeding and distributional aspects are provided.

Greek-French defence deal will widen Turkish rifts

2021 ◽  
Keyword(s):  
Eastern Mediterranean ◽  
Aegean Sea ◽  
Content Type ◽  
Low Level ◽  
Defence Procurement

Significance A win-win deal for both, it strengthens their long-standing excellent relations. It also enhances Greece’s military position in the Aegean Sea and France’s presence in the Eastern Mediterranean. However, following a peaceful summer in the Aegean, the pact risks raising tensions between Greece (and Cyprus) and Turkey over maritime borders and drilling rights. Impacts US-Greek defence agreement will be updated to cover a long-term arrangement, allowing for more investment in US bases in Greece. Turkish defence procurement from Russia is likely to rise, straining ties with Washington. Low-level exploratory talks between Greece and Turkey will continue as scheduled amid mutual recriminations.

scholarly journals Heterozygosity fitness correlations and generation interval of the Norway lobster in the Aegean Sea, eastern Mediterranean

2019 ◽  
Vol 26 (1) ◽  
Author(s):  
Georgios A. Gkafas ◽  
Marianthi Hatziioannou ◽  
Emmanouil E. Malandrakis ◽  
Costas S. Tsigenopoulos ◽  
Ioannis T. Karapanagiotidis ◽  
...  
Keyword(s):  
Eastern Mediterranean ◽  
Aegean Sea ◽  
Recruitment Strategy ◽  
Breeding Period ◽  
Nephrops Norvegicus ◽  
Norway Lobster ◽  
Genetic Impact ◽  
Potential Population ◽  
High Gene ◽  
Local Residents

Abstract Background Comprehensively detailed information on population dynamics for benthic species is crucial since potential admixture of individuals could shift the genetic subdivision and age structure during a full breeding period. The apparent genetic impact of the potential recruitment strategy of Norway lobster Nephrops norvegicus is still under research. For this reason the present study was focused on genetic variation of the species over a given continuous year period in a semi-enclosed gulf of the Aegean Sea. Results Analyses revealed that the relative smaller size class in females and the apparent faster growth of males may represent a key-role differential strategy for the two sexes, whereas females tend to mature slower. Heterozygosity fitness correlations (HFCs) showed substantially significant associations suggesting that inbreeding depression for females and outbreeding depression for males are the proximate fitness mechanisms, respectively. Conclusions Nephrops norvegicus uniformal genetic composition (background of high gene flow), could be attributed to potential population recolonization, due to a hypothesized passive larval movement from deeper waters, which may suggest that some offspring of local residents and potential male non-breeders from other regions admixture randomly.

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