Articles | Volume 23, issue 13
https://doi.org/10.5194/bg-23-4667-2026
https://doi.org/10.5194/bg-23-4667-2026
Research article
 | 
08 Jul 2026
Research article |  | 08 Jul 2026

Modelling the impacts of marine heatwaves on plankton in the Salish Sea

Karyn D. Suchy, Susan E. Allen, Akash R. Sastri, and Kelly V. Young

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Cited articles

Allen, S. E., Soontiens, N. K., Dunphy, M., Olson, E. M., and Latornell, D. J.: Controls on exchange through a tidal mixing hotspot at an estuary constriction, J. Phys. Oceanogr., 55, 415–433, https://doi.org/10.1175/JPO-D-24-0001.1, 2025. 
Amaya, D. J., Miller, A. J., Xie, S. P., and Kosaka, Y.: Physical drivers of the summer 2019 North Pacific marine heatwave, Nat. Commun., 11, 1903, https://doi.org/10.1038/s41467-020-15820-w, 2020. 
Barth, A., Walter, R. K., Robbins, I., and Pasulka, A.: Seasonal and interannual variability of phytoplankton abundance and community composition on the Central Coast of California, Mar. Ecol. Prog. Ser., 637, 29–43, https://doi.org/10.3354/meps13245, 2020. 
Beutel, B. and Allen, S. E.: Seasonal and interannual Salish Sea inflow origins using Lagrangian tracking, J. Geophys. Res.-Oceans, 129, https://doi.org/10.1029/2023JC020106, 2024. 
Beutel, B., Allen, S. E., Xiong, J., Cullen, J. T., and Anderlini, T.: Water property variability into a semi-enclosed sea dominated by dynamics, modulated by properties, Biogeosciences, 22, 7309–7336, https://doi.org/10.5194/bg-22-7309-2025, 2025. 
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Short summary
We used a biophysical model to examine the impacts of the 2014–2017 Northeast Pacific Marine Heatwave on plankton in the Salish Sea. Warming was strongest in the Juan de Fuca Strait, increasing phytoplankton growth. The Strait of Georgia showed stronger links to the North Pacific Gyre Oscillation with warming beyond 2017 and a reduction in large phytoplankton. Results highlight that multiple marine heatwaves can overlap within one waterbody, each with distinct effects on the local food web.
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