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Surface water temperatures were normal in the Skagerrak and Kattegat, but above normal in the Baltic Proper. Nutrient concentrations were normal in the whole investigated area. In the main part of the Baltic Proper oxygen concentrations below 2 ml/l were observed at depths exceeding 70 to 80 …

SMHI has been monitoring some sorts of algae in the Baltic, the Skagerrak and the Kattegat since 2002. Algae can be detected from satellite when they gather on or near the sea surface.

Surface nutrient concentrations were normal in all areas. The oxygen concentration in the deep water of the southern Kattegat and in the Sound was slightly lower than normal. In the western and eastern Gotland Basins oxygen concentrations below 2 ml/l were found at depth exceeding 70-80 meters. …

Now SMHI and SYKE are increasing their joint monitoring of the state of the environment in the Gulf of Bothnia, the Baltic Proper and the Kattegat. A TransAtlantic merchant vessel that plies the seas non-stop has been equipped with a “FerryBox”. Every 20 seconds, automatic measurements of the water …

Right now it is too early to issue any weather forecasts for 19 June, when the wedding of Crown Princess Victoria of Sweden and Daniel Westling is to be held. However we can offer a historical review of the weather for the previous six royal weddings held in Stockholm, the first being the nuptials …

Oceanography is the science of the sea. It encompasses currents, waves and the physical properties of seawater. Oceanography even includes the interaction of the sea with the atmosphere and with run-off from land.

Waves are created when the wind blows. Even the gentlest wind causes ripples on the sea surface. Inside the waves the water mass moves in a circular motion backwards and forwards, up and down. There is no forward movement inside the wave – it is the wave energy that moves.

Oxygen is the most important gas in the sea, as it is necessary for all higher forms of life. The surface water is usually saturated with oxygen, absorbed from the atmosphere and from photosynthesis of algae. In the deep water the oxygen is consumed when breaking down the organic matter that sinks …

In rare events the sea level at the coast can change by over a metre during short periods of only 5-60 minutes. This is caused by a storm surge.