Nature Climate Change, Published online: 13 November 2025; doi:10.1038/s41558-025-02495-8The 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An analysis of sea surface temperatures reveals that, since 2014, the Pacific Decadal Oscillation’s influence has been superseded by that of basin-wide warming, producing novel expressions of ocean variability and unexpected ecological impacts.

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