Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain
the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in
Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles
For each of the locations in Fig. 3, MHW metrics are shown on the basis of (i) daily SST anomalies used to define MHWs with a 90th-percentile threshold and a five-day minimum duration21, and (ii) monthly SST data used to define MHW with a 90th-percentile threshold and a one-month minimum duration. For the duration, intensity and thermal displacement, median values are shown, with the 25th–75th percentile range in parentheses.