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Hypoxic and anoxic regions in the Baltic Sea, 2015

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, 2015: download SVG (computed 2016)
Mar/Apr, 2015: download SVG (computed 2016)
Apr/May, 2015: download SVG (computed 2016)
Jul/Aug, 2015: download SVG (computed 2016)
Oct/Nov, 2015: download SVG (computed 2016)
Apr/May & Oct/Nov, 2015: download SVG (computed 2016)
The very strong MBI of December 2014 reached the Bornholm Basin in February (80-90% O2 saturation in the deep water) and the Gotland Deep in April with nearly 3 ml/l O2 at the bottom. Astonishingly high O2 consumption rates were observed since September reducing the O2 content to < 1 ml/l. Unexpectedly, the oxic period was shorter than during the MBIs in 1993 and 2003 and the northern and western Gotland Basins were not affected. A further MBI in Nov. could improve the situation again (MOHRHOLZ et al., 2015, NAUSCH et al., 2016).



  • MOHRHOLZ, V., NAUMANN, M., NAUSCH, G., KRÜGER, S., GRÄWE, U., 2015: Fresh oxygen for the Baltic Sea – An exceptional saline inflow after a decade of stagnation. – J. Mar. Syst. 148, 152-166. DOI: 10.1016/j.jmarsys.2015.03.005.
  • NAUSCH, G., NAUMANN, M., UMLAUF, L., MOHRHOLZ, V., SIEGEL, H., 2016: Hydrographichydrochemical assessment of the Baltic Sea 2015. – Meereswiss. Ber., Warnemünde, 101, doi: 10.12754/msr-2016-0101