Biogeosciences
Biogeosciences
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Articles | Volume 23, issue 19
Articles | Volume 23, issue 19
https://doi.org/10.5194/bg-23-6915-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-23-6915-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 23, issue 19
Research article
 | 
06 Oct 2026
Research article |  | 06 Oct 2026

Summer oxygen dynamics in the bottom waters of a wide, temperate shelf sea

Xin Meng, Claire Mahaffey, Juliane Wihsgott, and Jonathan Sharples

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Short summary
Summer oxygen loss in Celtic Sea bottom waters was investigated using ship observations and an oxygen budget. Seasonal layering cuts deep water off from the air, while microbes breaking down organic matter consume most oxygen. Winds can mix oxygen downward, but warming may worsen oxygen loss by speeding microbial activity and lowering oxygen solubility. This could push parts of the shelf sea toward oxygen deficiency, with risks for seafloor life and ecosystem health.
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