scholarly journals INTER-annual/decadal variability of the north Aegean Sea hydrodynamics over 1960-2000

2014 ◽  
Vol 15 (4) ◽  
pp. 696 ◽  
Author(s):  
V. VERVATIS ◽  
N. SKLIRIS ◽  
S. S. SOFIANOS
Keyword(s):  
Decadal Variability ◽  
Sea Water ◽  
Salt Content ◽  
Aegean Sea ◽  
The Black Sea ◽  
Minor Role ◽  
Freshwater Flux ◽  
The North ◽  
North Aegean ◽  
North Aegean Sea

Results from a high-resolution hindcast model experiment, supported by available observations, reveal an increasing salinity trend in the north Aegean during the Eastern Mediterranean Transient (EMT), largely controlled by increases in the flow rate and salinity of water masses of Levantine origin entering the domain through the Myconos-Ikaria strait as a response to an acceleration of the Aegean thermohaline cell. Changes in the Dardanelles inflow (increasing salinity) and in the surface freshwater flux (increasing Evaporation-Precipitation), although both contribute to a higher salt content of the basin during the EMT, play a minor role in the inter-annual/decadal variability of the freshwater budget. A long-term decreasing temperature trend is observed from the 1960s to the early 1990s. It is superimposed on the salinity-preconditioning phase over the 1980s and early 1990s. Both signals are, concomitantly, favouring conditions for intense Dense Water Formation (DWF) in the north Aegean Sea. In addition, the northward displacement of the Black Sea Water front over the EMT, leads to the expansion of convective cells towards the north and to higher formation rates associated with both colder and saltier surface waters.

scholarly journals Circulation and hydrological characteristics of the North Aegean Sea: a contribution from real-time buoy measurements

2002 ◽  
Vol 3 (1) ◽  
pp. 21 ◽  
Author(s):  
K. NITTIS ◽  
L. PERIVOLIOTIS
Keyword(s):  
General Circulation ◽  
Sea Water ◽  
Aegean Sea ◽  
The Black Sea ◽  
Hydrological Characteristics ◽  
The North ◽  
Open Sea ◽  
North Aegean ◽  
North Aegean Sea ◽  
Water Outflow

In the framework of the POSEIDON Project, a network of open sea oceanographic buoys equipped with meteorological and oceanographic sensors has been operational in the Aegean Sea since 1998. The analysis of upper-ocean physical data (currents at 3m, temperature and salinity at 3-40m depths) collected during the last 2 years from the stations of the North Aegean basin indicates a strong temporal variability of flow field and hydrological characteristics in both synoptic and seasonal time scales. The northern part of the basin is mainly influenced by the Black Sea Water outflow and the mesoscale variability of the corresponding thermohaline fronts, while the southern stations are influenced by the general circulation of the Aegean Sea with strong modulations caused by the seasonally varying atmospheric forcing.

scholarly journals High resolution simulations on the North Aegean Sea seasonal circulation

2003 ◽  
Vol 21 (1) ◽  
pp. 251-265 ◽  
Author(s):  
V. H. Kourafalou ◽  
K. Barbopoulos
Keyword(s):  
High Resolution ◽  
Sea Water ◽  
Eastern Mediterranean ◽  
Aegean Sea ◽  
Ocean Model ◽  
The Black Sea ◽  
The North ◽  
Seasonal Characteristics ◽  
North Aegean ◽  
North Aegean Sea

Abstract. The seasonal characteristics of the circulation in the North Aegean Sea are examined with the aid of a climatological type simulation (three-year run with perpetual year forcing) on a fine resolution grid (2.5 km by 2.5 km). The model is based on the Princeton Ocean Model with a parameterisation of plume dynamics that is employed for the input of waters with hydrographic properties that are different than the properties of basin waters, as the Black Sea Water (BSW) outflow through the Dardanelles Strait and riverine sources. The model is nested with a sequence of coarser regional and basin-wide models that provide for the long-term interaction between the study area and the Eastern Mediterranean at large. The results are employed to discuss the response of the North Aegean to the important circulation forcing mechanisms in the region, namely wind stress, heat and salt fluxes, buoyancy due to rivers and the BSW outflow (which is low in salinity and occasionally low in temperature) and the interaction with the Southern Aegean. The high resolution allows for the detailed representation of the complicated topography that presides in the region. This helps produce a rich eddy field and it allows for variability in the pathways of BSW that has implications in the basin hydrography and circulation.Key words. Oceanography: general (continental shelf processes; numerical modeling)

scholarly journals Coccolithophore assemblage response to Black Sea Water inflow into the North Aegean Sea (NE Mediterranean)

2017 ◽  
Vol 149 ◽  
pp. 138-150 ◽  
Author(s):  
B.-Th. Karatsolis ◽  
M.V. Triantaphyllou ◽  
M.D. Dimiza ◽  
E. Malinverno ◽  
A. Lagaria ◽  
...  
Keyword(s):  
Black Sea ◽  
Sea Water ◽  
Aegean Sea ◽  
Water Inflow ◽  
The North ◽  
North Aegean ◽  
Ne Mediterranean ◽  
North Aegean Sea

scholarly journals Modeling the buoyancy-driven Black Sea Water outflow into the North Aegean Sea

Oceanologia ◽  
2016 ◽  
Vol 58 (2) ◽  
pp. 103-116 ◽  
Author(s):  
Nikolaos Kokkos ◽  
Georgios Sylaios
Keyword(s):  
Black Sea ◽  
Sea Water ◽  
Aegean Sea ◽  
The North ◽  
North Aegean ◽  
North Aegean Sea ◽  
Water Outflow

Variability of mesozooplankton spatial distribution in the North Aegean Sea, as influenced by the Black Sea waters outflow

2009 ◽  
Vol 78 (4) ◽  
pp. 557-575 ◽  
Author(s):  
Ioanna Siokou-Frangou ◽  
Soultana Zervoudaki ◽  
Epaminondas D. Christou ◽  
Vassilis Zervakis ◽  
Dimitrios Georgopoulos
Keyword(s):  
Spatial Distribution ◽  
Black Sea ◽  
Aegean Sea ◽  
The Black Sea ◽  
The North ◽  
North Aegean ◽  
North Aegean Sea

SeaWiFs satellite data analysis of Black Sea water discharge pattern into the Aegean Sea

2002 ◽  
Vol 46 (8) ◽  
pp. 195-202 ◽  
Author(s):  
L. Jönsson
Keyword(s):  
Water Quality ◽  
Black Sea ◽  
Satellite Data ◽  
Sea Water ◽  
Water Discharge ◽  
Aegean Sea ◽  
The North ◽  
Noaa Avhrr ◽  
North Aegean ◽  
North Aegean Sea

Satellite data from the SeaWiFS sensor has been used to determine chlorophyll-a contents in the North Aegean Sea using SEADAS 3.3 software. The data is used to extract knowledge on water movements/flow phenomena using chlorophyll as a “tracer” but will also indicate water quality. More than 100 SeaWiFS scenes from 1998 up to 2001 have been analyzed in terms of hydrodynamic phenomena, mainly the transport and spreading pattern of Black Sea Water in the North Aegean Sea but also concerning the water quality and its seasonal and yearly variation at the mouth region of the Dardanelles. Some comparison with earlier studies using NOAA AVHRR thermal data and historical CZCS scenes is also made.

Modelling the impact of Black Sea water inflow on the North Aegean Sea hydrodynamics

2010 ◽  
Vol 60 (3) ◽  
pp. 585-596 ◽  
Author(s):  
Margarita Tzali ◽  
Sarantis Sofianos ◽  
Anneta Mantziafou ◽  
Nikolaos Skliris
Keyword(s):  
Black Sea ◽  
Sea Water ◽  
Aegean Sea ◽  
Water Inflow ◽  
The North ◽  
North Aegean ◽  
North Aegean Sea ◽  
The Impact

The influence of Black Sea Water inflow and its synoptic time-scale variability in the North Aegean Sea hydrodynamics

2016 ◽  
Vol 66 (2) ◽  
pp. 195-206 ◽  
Author(s):  
Apostolia-Maria Mavropoulou ◽  
Anneta Mantziafou ◽  
Ewa Jarosz ◽  
Sarantis Sofianos
Keyword(s):  
Black Sea ◽  
Time Scale ◽  
Sea Water ◽  
Aegean Sea ◽  
Water Inflow ◽  
The North ◽  
North Aegean ◽  
North Aegean Sea

scholarly journals Dispersion of 137Cs concentration in the basins of the Aegean Sea

2020 ◽  
Vol 19 ◽  
pp. 135
Author(s):  
F. K. Pappa ◽  
D. L. Patiris ◽  
G. Eleftheriou ◽  
C. Tsabaris ◽  
M. Kokkoris ◽  
...  
Keyword(s):  
Activity Concentration ◽  
Sea Water ◽  
Water Movement ◽  
Aegean Sea ◽  
137Cs Activity ◽  
Water Masses ◽  
The Black Sea ◽  
The North ◽  
Seawater Samples ◽  
North Aegean Sea

The anthropogenic radionuclide 137Cs is used as a valuable oceanographic tracer for the study of sea water masses identification and water movement. In the present work, 137Cs activity concentrations have been investigated in deep basins of Aegean Sea. Seawater samples were collected from five different sampling stations, during scientific oceanic campaigns from the period March to April 2008. The applied methodology was based on the adsorption of radiocaesium from dissolved AMP (Ammonium Phosphomolybdate Hydrate) in 20 L water samples. Moreover, during the pre- concentration procedure, the 134Cs was used as reference tracer for determining the chemical efficiency and consequently to measure the activity concentration in a High Purity Ge detector. In terms of vertical records, the activity concentration in the selected basins ranged between 3-8.5 Bq/m3, depending on the region and the depth of the basins. The higher concentration (8.5 Bq/m3) was found in the region between Lemnos Island and the narrows of Dardanelles. The maximum concentrations were observed at the North Aegean Sea basins, between 20 and 40 m of depth, caused by the water masses coming from the Black Sea. At the Cretan Sea the vertical activity concentration of 137Cs was homogeneous down to 2000 m depth, with an exception at the 800 m where it was decreasing significantly due to the transient deep-water masses from Adriatic Sea.

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