Biogeosciences
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Articles | Volume 23, issue 12
Articles | Volume 23, issue 12
https://doi.org/10.5194/bg-23-4145-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/bg-23-4145-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 23, issue 12
Research article
 | 
23 Jun 2026
Research article |  | 23 Jun 2026

Biochemical characteristics of the sea surface microlayer in the central Baltic Sea and potential signatures of cyanobacterial blooms

Josefine Karnatz, Theresa Barthelmeß, Bita Sabbaghzadeh, and Anja Engel

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Short summary
Cyanobacteria form massive summer blooms in the Baltic Sea that release organic compounds to the ocean’s surface. By analyzing the thin boundary layer between ocean and atmosphere, this study shows that cyanobacteria influence the molecular composition and surface properties of the sea surface, increasing surfactants that may reduce gas exchange. The findings provide new insight into how future cyanobacteria blooms could affect air-sea interactions and climate-related processes.
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