Biogeosciences
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Articles | Volume 23, issue 14
Articles | Volume 23, issue 14
https://doi.org/10.5194/bg-23-5095-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-23-5095-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 23, issue 14
Research article
 | 
24 Jul 2026
Research article |  | 24 Jul 2026

Assessing methane emissions from an offshore marine aggregate extraction site near Sylt, Eastern North Sea

Martina Schmidt, Ingeborg Bussmann, Sarah J. E. Reith, Annika Palzer, Cedric Couret, Frank Keppler, Daniela Polag, Lasse Sander, Moritz Schroll, and Julia B. Wietzel

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Short summary
Methane (CH4) measurements near a sand dredging site off Sylt (North Sea) revealed elevated concentrations in both air and water, particularly during summer. CH4 fluxes were significantly higher at the dredging site compared to surrounding areas. Isotopic signatures suggest a microbial origin. These findings indicate that coastal sand extraction may represent a previously unaccounted source of atmospheric CH4.
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