Temperature and salinity variability in the Greek Seas based on POSEIDON stations time series: preliminary results

Abstract

Temperature and salinity time series provided by three POSEIDON monitoring stations (buoys) are examined in order to study the seasonal and interannual variability of the water mass characteristics. The sites at Athos (North Aegean Sea), E1M3A (Central Cretan Sea) and Pylos (Eastern Ionian Sea) were chosen, as these buoys provide measurements at various depths, while they represent 3 major basins respectively. The study of the T and S characteristics reveals important seasonal changes and highlights the particular characteristics of each basin. Dense water production in the Northern Aegean is found to be hindered by the presence of the surface Black Sea Water (BSW) mass. On the other hand, the intermediate water mass in the Cretan Sea is shown to be ventilated during the winter season. A significant temperature and salinity increase has been monitored over both the Cen-

Dense intermediate water outflow from the Cretan Sea: A salinity driven, recurrent phenomenon, connected to thermohaline circulation changes

“…Whatever caused this salinity increase seems to follow an east to west direction. As argued in Velaoras et al [2013], the observed intermediate layer temperature and salinity increase may have originated in the Cretan Sea as a locally produced CIW with enhanced salinity, which reached the southeastern Ionian area through the Western Cretan Straits or may signify a thermohaline variation which influenced the intermediate layers (both LIW and CIW) in the whole eastern part of the EMed.…”

“…The Cretan Sea dataset comes from two different sources: (1) Velaoras et al [2013]. Apart from the wider time period covered, data used herein differ in that they are derived directly by the data loggers internal storing memory, while data in Velaoras et al [2013] are derived by the real-time transmission database.…”

“…Apart from the wider time period covered, data used herein differ in that they are derived directly by the data loggers internal storing memory, while data in Velaoras et al [2013] are derived by the real-time transmission database. This makes the former dataset more coherent since the real-time transmission often presents more time gaps and spikes.…”

“…In the vicinity of the Cretan Straits exit, the Cretan Passage and the Southeastern part of the Ionian Sea, data derive from three sources: (1) CTD casts from the HNODC collected in the framework of various national and international projects during the period 1986-2012, (2) Data from the MEDAR/MEDATLAS II database [MEDAR Group, 2002] for the E1M3A buoy, data from Pylos used herein differ in that they are derived directly by the dataloggers internal storing memory while data in Velaoras et al [2013] are derived by the real-time transmission database. To face the biofouling problem, surface salinity data were not taken into consideration.…”

The Corrosion Behavior of an Ag43Cu37Zn20 Alloy in the Natural Seawaters

“…Coastal location and season could influence the salinity of seawater, but generally the salinity of water from the Adriatic, Aegean and Ionian Seas are higher than the standard seawater. 14,15) The IAPSO standard seawater has 35.000 « 0.010 g/kg TDS.…”