IOW Logo

Hypoxic and anoxic regions in the Baltic Sea, 1991

The content of this webpage is part of the Marine Science Report No 100 2016 and should be cited as:

Susanne Feistel, Rainer Feistel, Dietwart Nehring, Wolfgang Matthäus, Günther Nausch, Michael Naumann: Hypoxic and anoxic regions in the Baltic Sea, 1969 - 2015. Meereswiss. Ber., Warnemünde, 100 (2016) doi: 10.12754/msr-2016-0100

All version information and information on further technical development are available via the website

Jan/Feb, 1991: download SVG (computed 2016)
Mar/Apr, 1991: download SVG (computed 2016)
Apr/May, 1991: download SVG (computed 2016)
Jul/Aug, 1991: download SVG (computed 2016)
Oct/Nov, 1991: download SVG (computed 2016)
Apr/May & Oct/Nov, 1991: download SVG (computed 2016)
The inflow of deep water, not meeting the criteria of a MBI, supplied the Bornholm and the Gdańsk Basins with oxygen in February and March 1991. This inflow affected the distribution of oxygen in the shallow parts of the eastern Gotland Basin as well. However, H2S was observed in the deep water of the Gotland and Fårö Deeps in very high concentrations during the whole year. In May/June, oxygen concentrations above 1 ml/l were observed in the bottom water of the western Gotland Basin (NEHRING & MATTHÄUS, 1991/92).



  • NEHRING, D., MATTHÄUS, W., 1991/92: Die hydrographisch-chemischen Bedingungen in der westlichen und zentralen Ostsee im Jahre 1991. – Dtsch. Hydrogr. Z., 44, 217-238.