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infancy. The bottom water of the Arkona Basin was well oxygenated with concentrations exceeding 7.6 ml/l. At the bottom of the Bornholm Deep there was a thin layer of new water with an oxygen content of 4.8 ml/l. In the remaining parts of the Baltic, oxygen concentrations below 2 ml/l were present at Last updated: Apr 23, 2014

to OSPAR's work with nutrient indicators for the Marine Strategy Framework Directive in the OSPAR maritime area, see Figure 1. Associated error fields from the Diva analysis are also of great interest as they indicate areas with too little or no data. The results may be further investigated to Last updated: Jul 21, 2015

flos-aquae was found at BY38 just like at the last cruise. The diatoms Skeletonema marinoi (chain) and Chaetoceros subtilis (arrow) were present in the Sotuhern Baltic and indicated the start of the spring bloom there. Phytoplankton analysis and text by Ann-Turi Skjevik 4Selection of observed species N Last updated: Mar 27, 2017

International Bottom Trawl Survey and covered the Skagerrak and the Kattegatt. In the Skagerrak 9 stations with complete hydrography and 8 with sampling of oxygen and salinity in bottom water were visited. In the Kattegatt mapping of oxygen conditions in bottom water was performed, 9 stations with complete Last updated: Apr 23, 2014

information will be presented in this report, only species lists and the chlorophyll diagrams. Last updated: Jan 26, 2017

diversity was very low, the integrated (0-20m) chlorophyll concentration was below normal for this month. 4CTRY BP 23rd of April This station is sampled instead of BCSIII-10 for the time being. A few species were observed, among them the dinoflagellate Peridiniella catenata, the filamentous cyanobacterium Last updated: May 09, 2017

Surface water temperatures were above normal in most of the investigated areas, with the exception for the Northern and Central Baltic Proper, where temperatures were typical for the season. Nutrients in the surface layer showed concentrations normal for the season in all areas. Oxygen situation in Last updated: Aug 28, 2014

Last updated: Oct 26, 2021

by Pseudochattonella spp.* and the largest number, 120 000 cells per liter, was found at Å15. Signs of the coming diatom spring bloom were observed at N14 in the Kattegat and at Å17 in the Skagerrak by rather high cell numbers of Skeletonema marinoi. The integrated chlorophyll a concentrations were Last updated: Mar 02, 2017