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surface salinity showed typical values for the season. Temperature varied between 2.1 and 4.1oC. The salinity in the surface layer of the Bothnian Sea was about 5.5 psu, while it in the Bothnian Bay was ca. 3 psu. All nutrients showed normal values for this time of the year. Phosphate concentrations in Last updated: Apr 23, 2014

Annual report of the Swedish marine monitoring programme. Last updated: Sep 15, 2023

can be found here http //www.smhi.se/klimatdata/oceanografi/havsmiljodata (only available in Swedish). The Kattegat and the Sound The sea surface temperature was above normal for the season, 18.1°C in the Kattegat and 17.6°C in the Sound. The salinity in the surface water of the Kattegat was above Last updated: Oct 10, 2018

Kattegat. 12 stations. Surface temperatures were typical normal for the season, while the surface salinity was slightly above normal. All nutrients showed normal values in both sea areas. Oxygen conditions in the bottom waters of Skagerrak were good, while in parts of the southern Kattegat some low values Last updated: Oct 25, 2018

-279 CRUISE REPORT FROM R/V ARGOS Survey period 2002-12-01 - 2002-12-12 Survey area The Skagerrak, the Kattegat, the Sound, the Baltic proper and the Gulf of Bothnia. Principal SMHI SUMMARY The expedition was performed within SMHI’s regular marine monitoring programme and covered the Skagerrak, the Kattegat Last updated: Apr 23, 2014

showed low levels, which indicate low phytoplankton concentrations. The deep water was well oxygenated in the whole area which is normal for the season. The oxygen concentrations near the bottom were generally above 6 ml/l. In the Sound it was just above 5 ml/l. The Baltic Proper and the Sea of Åland The Last updated: Mar 02, 2018

observed with fluorescence measurements with the CTD probe. High concentrations of phytoplankton were noted at 5 - 20 meters deep. Extra phytoplankton samples were taken in these fluorescence maxima which will be analyzed and reported in the separate algae report "AlgAware". The deep water in the entire Last updated: Apr 18, 2018

Bengt Yhlen Lars Andersson Swedish Meteorological and Hydrological Institute Oceanographical Laboratory 2007-11-01 Dnr Mo-2007-192 CRUISE REPORT FROM R/V ARGOS Survey period 2007-09-30 - 2007-11-01 Survey area The Bothnian Sea, Baltic Proper, Sound, Kattegat and Skagerrak Principal SMHI and the Last updated: Apr 23, 2014

normal for the season and varied between 4 and 5°C, lowest near the coast. The salinity in the open sea Skagerrak surface layer was normal for the season and below normal at the coast, the salinity ranged between 16.7 and 31.6. The stratification, both the thermocline and the halocline, was well Last updated: Mar 24, 2016

bottom water were measured at Anholt E in the Kattegat, 5.04 ml/l and at W Landskrona in the Sound, 4.32 ml/l. The Baltic Proper The temperature of the surface layer was normal for the season and varied from 11.1°C to 14.5°C. Sea surface salinity was slightly above normal in southwestern Baltic and Last updated: Jun 22, 2015