Ocean Science
Ocean Science
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Articles | Volume 22, issue 3
Articles | Volume 22, issue 3
https://doi.org/10.5194/os-22-1569-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/os-22-1569-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 22, issue 3
Research article
 | 
18 May 2026
Research article |  | 18 May 2026

Quantifying farmed kelp atmospheric CO2 uptake and release through localized air-sea flux measurements in the Northern Gulf of Alaska

Josianne Haag, Cale A. Miller, Jonah Jossart, and Amanda L. Kelley

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Cited articles

Alcantar, M. W., Hetrick, J., Ramsay, J., and Kelley, A. L.: Examining the impacts of elevated, variable pCO2 on larval Pacific razor clams (Siliqua patula) in Alaska, Front. Mar. Sci., 11, 1253702, https://doi.org/10.3389/fmars.2024.1253702, 2024. 
Bednaršek, N., Pelletier, G., Beck, M. W., Feely, R. A., Siegrist, Z., Kiefer, D., Davis, J., and Peabody, B.: Predictable patterns within the kelp forest can indirectly create temporary refugia from ocean acidification, Sci. Total Environ., 945, 174065, https://doi.org/10.1016/j.scitotenv.2024.174065, 2024. 
Bignami, S., Sponaugle, S., and Cowen, R. K.: Response to ocean acidification in larvae of a large tropical marine fish, Rachycentron canadum, Glob. Change Biol., 19, 996–1006, https://doi.org/10.1111/gcb.12133, 2013. 
Boderskov, T., Nielsen, M. M., Rasmussen, M. B., Balsby, T. J. S., Macleod, A., Holdt, S. L., Sloth, J. J., and Bruhn, A.: Effects of seeding method, timing and site selection on the production and quality of sugar kelp, Saccharina latissima: A Danish case study, Alg. Res., 53, 102160, https://doi.org/10.1016/j.algal.2020.102160, 2021. 
Bresnahan Jr., P. J., Martz, T. R., Takeshita, Y., Johnson, K. S., and LaShomb, M.: Best practices for autonomous measurement of seawater pH with the Honeywell Durafet, Methods in Oceanography, 9, 44–60, https://doi.org/10.1016/j.mio.2014.08.003, 2014. 
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This study explores the growing interest in using farmed kelp as a method of marine carbon dioxide removal, focusing on two kelp farms in the Northern Gulf of Alaska. We measured net air-sea carbon dioxide exchange using sensors placed inside and outside each farm from winter to spring 2024. One farm served as a carbon sink while one served as a source of carbon dioxide to the atmosphere. Our findings highlight the importance of site selection in modulating local carbon capture.
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