Marine heatwaves: definition duel heats up
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Changing the commonly used definition of a marine heatwave from a fixed to a shifting temperature baseline (D. J. Amaya _et al_. _Nature_ 616, 29–32; 2023) would be inconsistent with current
trends and confuse communications relating to extreme conditions. A full list of co-signatories to this letter appears in Supplementary Information. COMPETING INTERESTS The author declares
no competing interests.