![]() The temperature of the sea is influenced by depth and upwelling Moreover, the largest saline body of water of the Baltic Sea is found in the Gotland Deep, which is one of the deepest basins. its salinity increases from the surface towards the bottom. As a result, the water in the Baltic Sea is permanently stratified, i.e. ![]() This inflowing water is saltier and heavier than the brackish water of the Baltic Sea and thus sinks to the deep layers. Abundant freshwater flows into the Baltic SeaĪlthough freshwater flows from numerous rivers to the Baltic Sea, salty water from the oceans can only enter the basin through the shallow Danish straits. ![]() Therefore, when compared to oceans, the Baltic Sea could be considered as a very large estuary. Such regional salinity changes are typical in estuaries of the world’s oceans. For example, at the inner part of the Gulf of Finland, salinity ranges from only 0-3 and measures approximately 2 in the Gulf of Bothnia. The surface water salinity of the Baltic Sea is still around 20 in the Danish straits but decreases gradually northwards. Utö Atmospheric and Marine Research StationĬompared to ocean seawater, the less saline water of the Baltic Sea is known as brackish water because it has slightly different characteristics.Metsähallitus, Parks & Wildlife Finland.Organisations and research institutions.Finmari – infrastructure for marine research.Protection and management of cultural heritage.Marine management and environmental protection.Marine environment and marine natural resources.Legislation, conventions and programmes.Temperature, salinity, and stratification.
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