Nature Climate Change, Published online: 13 February 2025; doi:10.1038/s41558-025-02263-8
Satellite observations suggest a slowdown in the decay of sea surface temperature anomalies over the past four decades, coinciding with an increase in the duration of marine heatwaves. This change is probably linked to factors such as stronger upper-ocean stratification, a deepening mixed layer and weakening oceanic forcing.