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summarized in the Appendix. At the Huvudskär ocean buoy a reference CTD cast was taken. Analysis of plankton samples are presented in the separate plankton report "AlgAware" which is published on SMHI's website shortly after the expedition. https //www.smhi.se/en/publications/algal-situation-reports-2 Last updated: Jun 25, 2019

SMHI performed an oxygen and nutrient mapping survey within SLU Aqua’s cruise; International Bottom Trawl Survey (IBTS Q3), that covers the Skagerrak, the North Sea and the Kattegat. SMHI joins the cruise to perform CTD measurements in connection to each trawl and to take water samples for Last updated: Oct 28, 2024

A3-dimensional baroclinic model of the North Sea and the Baltic Sea, designed for a daily operational use is described in detail. The model is based on a similar model running in operational mode at the German Federal Maritime and Hydrographic Agency (BSH) in Hamburg, Germany. The operational Last updated: Apr 23, 2014

blooms were observed in any of the sea areas. Last updated: Apr 23, 2014

The surface water temperatures were normal for the whole area. The nutrient concentrations were low in all sea areas, which is normal for the season due to the ongoing algal blooms. Oxygen concentrations below 2 ml/l were found on depths under 80 m in the Western and Eastern Gotland Basin, and Last updated: Apr 23, 2014

Weak winds from the north dominated. The surface water temperatures were normal for the season in the whole area i.e. about 6°C in the Skagerak, 6.5°C in the Kattegat and between 5 and 3°C in the Baltic. Water of high nitrate content (20 mM) was found north of Jylland (station HS5). In the Kattegat Last updated: Apr 23, 2014

The weather was mostly cloudy and hazy. Moderate to strong winds from the west dominated. The surface water temperatures were normal for the season in the whole area i.e. about 5°C in the Skagerrak, 3°C in the Kattegat and between 2 and 4°C in the Baltic. The spring bloom in the Kattegat continued Last updated: Apr 23, 2014

The surface water temperatures were normal for the whole area. The nutrient concentrations were low in all sea areas with exception of HS5 at the Jutland coast (high nitrate) and W Landskrona in the Sound (high silicate). These low values are normal for the season due to the algal blooms. Oxygen Last updated: Apr 23, 2014

The weather was dominated by moderate winds from south to southwest. The sea surface temperatures as well as the surface nutrient concentrations were normal for the season. The spring-bloom had not yet started in any area. The bottom water at station BY4 in the Bornholm Basin was oxygenated Last updated: Apr 23, 2014

The temperatures varied between 9.3°C in the northern Batlic proper and 12.5°C in the Skagerrak. Nutrient concentrations were generally normal for the season with a few exceptions. The bottom water oxygen deficiency in the southeastern Katteagatt was restored to normal oxygen concentrations. In the Last updated: Apr 23, 2014