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Hypoxic and anoxic regions in the Baltic Sea, 1969

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, 1969
Mar/Apr, 1969: download SVG (computed 2016)
Apr/May, 1969: download SVG (computed 2016)
Jul/Aug, 1969: download SVG (computed 2016)
Oct/Nov, 1969: download SVG (computed 2016)
Apr/May & Oct/Nov, 1969: download SVG (computed 2016)
The oceanographical conditions were influenced by the moderate MBI in February 1969 which terminated the stagnation period lasting since 1965. The deep water in the Bornholm and the Gdańsk Basins was supplied with oxygen beginning in Feb./March. In the eastern Gotland Basin, H2S was replaced by O2 in the bottom water step by step. First signs of the inflowing water were observed in March. In Oct. an intermediate layer containing H2S was found. The Basin was free of H2S in Nov./Dec., whereas anoxic conditions were observed in the northern and western Gotland Basin during the whole year (NEHRING & FRANCKE, 1973a).



  • NEHRING, D., NEHRING, D., FRANCKE, E., 1973a: Zusammenfassende Darstellung der hydrografischchemischen
    Veränderungen in der Ostsee 1969/1970. – Fischerei-Forschung, 11(1), 31-43. (Link)