Seminar
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OCEAN seminar at Donsö Shipping Meet: "Unexpected methane emissions triggered by ship passages"

Join Chalmers OCEAN as we host a seminar at Donsö Shipping Meet, at Donsö. Researchers Ida-Maja Hassellöv, Johan Mellqvist and Rikard Bensow talk about current OCEAN-related research.

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Overview

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3 Sep 2025, 08:303 Sep 2025, 09:30
Donsö, Gothenburg's southern archipelago (Opens in new tab)
Mer om Donsö Shipping Meet (Opens in new tab)
Language:Swedish

At this breakfast seminar, Chalmers professors Ida-Maja Hassellöv, Johan Mellqvist and Rikard Bensow will present brand-new research showing that ships in shallow, methane-rich waters can trigger sudden greenhouse gas emissions from the seabed. Measurements in the Baltic Sea revealed methane levels up to 20 times higher in busy shipping lanes than in nearby areas.

The effect is caused not by fuel type but by hydrodynamic forces – pressure changes and turbulence that disturb sediments. With many major ports located in similar environments, these findings highlight an overlooked emission source with relevance for the global marine and shipping methane budget. 

Ida-Maja Hassellöv

  • Head of Division, Maritime Envi­ron­men­tal Science, Envi­ron­men­tal and Energy Sciences
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OCEAN seminar at Donsö Shipping Meet: "Unexpected methane emissions triggered by ship passages" | Chalmers