The Pacific Decadal Oscillation describes the most important pattern of low-frequency climate variability in the North Pacific. An analysis of sea surface temperatures reveals that, since 2014, the Pacific Decadal Oscillation’s influence has been superseded by that of basin-wide warming, producing novel expressions of ocean variability and unexpected ecological impacts.
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References
Mantua, N. J., Hare, S. R., Zhang, Y., Wallace, J. M. & Francis, R. C. A Pacific interdecadal climate oscillation with impacts on salmon production. Bull. Am. Meteor. Soc. 78, 1069–1080 (1997). The paper that defined the PDO and describes its historical impact on North Pacific salmon fisheries.
Litzow, M. A. et al. Quantifying a novel climate through changes in PDO-climate and PDO-salmon relationships. Geophys. Res. Lett. 47, e2020GL087972 (2020). This paper reports changing correlations between the PDO and salmon production in the Gulf of Alaska in recent years.
Huang, B. et al. Extended Reconstructed Sea Surface Temperature version 5 (ERSSTv5), upgrades, validations, and intercomparisons. J. Clim. 29, 8179–8205 (2017). A paper that presents the long-term SST dataset used in our analysis.
Overland, J. E. & Wang, M. Future climate of the North Pacific Ocean. Eos 88, 178–182 (2007). This paper shows the importance of both warming and the PDO in climate projections extending to 2100.
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This is a summary of: Cluett, A. A. et al. Pan-basin warming now overshadows robust Pacific Decadal Oscillation. Nat. Clim. Change https://doi.org/10.1038/s41558-025-02482-z (2025).
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Warming overpowers low-frequency North Pacific climate variability. Nat. Clim. Chang. 15, 1279–1280 (2025). https://doi.org/10.1038/s41558-025-02495-8
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DOI: https://doi.org/10.1038/s41558-025-02495-8