Biogeosciences
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Articles | Volume 23, issue 16
Articles | Volume 23, issue 16
https://doi.org/10.5194/bg-23-5961-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/bg-23-5961-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 23, issue 16
Research article
 | 
28 Aug 2026
Research article |  | 28 Aug 2026

Buoyancy and polarity driven accumulation of dissolved organic matter in the sea surface microlayer during a phytoplankton bloom

Jasper Zöbelein, Shubham Sawle, Gernot Friedrichs, Mariana Ribas-Ribas, Carola Lehners, Katharina Paetz, Maximilian Pflaum, and Hannelore Waska

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Short summary
The ocean is glazed with a one-millimetre biofilm that controls the flow of gases and energy from the atmosphere. To investigate how this film forms, we cultivated microscopic algae in a tank under controlled, windless conditions. Our results show that carbohydrates released by these algae rise to the surface, forming "carbo-slicks" that create a gel-like layer. This demonstrates that biological production is a key driver of the sea surface, which is crucial for understanding carbon exchange.
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