Summary
Western Gotland Basin: Oxygen conditions at the bottom were bad, especially on the Gotland side where levels below 2 ml/l were found deeper than 55 metres. Hydrogen sulphide was recorded from depth of 90 meters in general, but locally already from 75 meters. Eastern Gotland Basin (western part): Oxygen concentrations at bottom were very low. Levels below 2 ml/l were found from 60 to 70 metres and deeper. Hydrogen sulphide was detected at depths exceeding 80 meters outside southeastern Gotland. The Northern Midsjö Banks: Oxygen conditions at the bottom were good. The lowest oxygen amount recorded was 2.8 ml/l, corresponding to a saturation of 30%, at a depth of 38 metres. Hanö Bight and Bornholm Basin: Oxygen conditions at the bottom were good, except for in the northeastern part where the lowest oxygen amount recorded was 0.8 ml/l, corresponding to a saturation of 10%, at a depth of 60 metres.