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Appreciation from the United Nations: IOW's Baltic Sea long-term observation is officially part of the UN Oceans Decade

The IOW research vessel ‘Elisabeth Mann Borgese’ on the Baltic Sea with the official logo of the UN Ocean Decade.

The IOW has been collecting physical, chemical and biological Baltic Sea data for many decades. As of this year, the centrepiece of the IOW's long-term observation programme – the annual monitoring ship expeditions – has been officially recognised as a project of the United Nations (UN) “Decade of Ocean Science for Sustainable Development 2021 – 2030”.

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How sulphur affects the carbon cycle of subtropical seagrass meadows: New findings from Florida Bay

Marine chemist Mary Zeller taking samples in the study area of the seagrass study in Florida Bay together with her colleague and co-author Chris Lopes

Seagrass meadows have an important climate protection function due to their long-term carbon storage potential. An international research team led by the IOW has now been able to show that seagrass beds have a stronger influence on the carbon and sulphur cycling in subtropical coastal areas than previously thought. Of particular interest is the important role of sulphur, which stabilises organic carbon, regardless of whether it is sequestered in the calcareous sediments of subtropical seagrass meadows or remains in dissolved form.

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A look back on 50,000 years of South Pacific hydroclimate shows:
How wet it gets on earth also depends on the planet’s tilt

Jérôme Kaiser from the Leibniz Institute for Baltic Sea Research Warnemünde, expert in analysing environmental proxies from marine sediment cores

Understanding the causes of changing humidity and precipitation in the earth's past is crucial for better assessments of the planet’s future hydroclimate changes through improved modelling. A research team led by the IOW has now for the first time analysed 50,000 years of mid-latitude hydroclimate of the South-East Pacific using special moisture related indicators in marine sediment cores. The most important result is that natural variations in the earth's orbital parameters exert a decisive influence.

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Marine heatwaves in the Baltic Sea: IOW researchers investigate causes and effects

A summer sunrise over a calm Baltic Sea with the silhouette of a ship on the horizon colours the water and the sky deeply red.

Marine heatwaves – periods in which the upper water layers in the sea temporarily become exceptionally warm – are occurring with increasing frequency worldwide. Recent studies by the IOW have now confirmed this trend also for the Baltic Sea.

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Effects of bottom trawling: IOW leads large Baltic Sea field experiment with four research vessels

The research vessels ELISABETH MANN BORGESE and ALKOR in the Baltic Sea

On July 16, 2024, a 19-day research cruise will start in the Baltic Sea led by the IOW to investigate the impact of bottom trawling on the seabed and the organisms living there. In addition to the IOW research vessel ELISABETH MANN BORGESE, three more research vessels from other institutions are involved in the large-scale bottom trawling simulation experiment near Warnemünde.

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News

Research expedition for Benthic Monitoring in the Baltic Sea launched

On July 3, 2026, the research vessel “Elisabeth Mann Borgese” departed from Rostock (Germany) on Expedition EMB398. On board: an 11-people team of researchers from the IOW. Samples will be collected for three IOW projects, including surveys of benthic organisms, environmental DNA analysis, and molecular biological studies.

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