Articles | Volume 22, issue 18
https://doi.org/10.5194/bg-22-4779-2025
https://doi.org/10.5194/bg-22-4779-2025
Research article
 | 
19 Sep 2025
Research article |  | 19 Sep 2025

Methane ebullition as the dominant pathway for carbon sea-air exchange in coastal, shallow water habitats of the Baltic Sea

Thea Bisander, John Prytherch, and Volker Brüchert

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Short summary
Coastal waters exchange greenhouse gases with the atmosphere, but their exact contributions are not well understood. This study measured carbon dioxide and methane emissions in different Baltic Sea habitats using floating chambers. The results show that methane emissions, especially from bubbling, play a dominant role in the total exchange of many habitats. When scaled up over the Stockholm archipelago, the coastal emissions add significantly to the regional greenhouse gas budget.
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