Fig. 1: June 2023 marine heatwave characteristics from long-record satellite-based sea surface temperature dataset. | Communications Earth & Environment

Fig. 1: June 2023 marine heatwave characteristics from long-record satellite-based sea surface temperature dataset.

From: Exceptional atmospheric conditions in June 2023 generated a northwest European marine heatwave which contributed to breaking land temperature records

Fig. 1

a OSTIA SSTs for 1982–2023, mean climatologies (1982–2002 in full line and 2003–2022 in dotted line), 10th–90th centiles (anomalies smoothed with 31-day moving average), Shading: Category I, Category II, Category III marine heatwaves using Hobday et al.1 averaged over the NWS (NWS=thick black contour in (c)). b Same as a, but zoomed over the MHW, dashed red line is 2023-last 20-year trend c map of average OSTIA SST anomaly during peak week (19–25 June 2023) (relative to 1982–2012 mean), thin plain black contour: category II MHW, hashes: category III MHW, yellow contour: category IV MHW. d Normalised probability distribution of 7-day SST trends on the northwest European shelf—June 2023 maximum trend is in red (2.4 °C). It is the second highest trend after purple maximum trend (2.6 °C).

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