Fig. 4
From: Longer and more frequent marine heatwaves over the past century
Marine heatwave properties at six sites with century-long daily in situ temperature records. Shown are a–f the number of marine heatwaves (MHW) in each year, g–l average annual MHW intensity, m–r average annual MHW duration at Pacific Grove, Scripps Pier, Newport Beach (USA), Arendal (Norway), Port Erin (UK) and Race Rocks (Canada). Red lines show means over 1925–1954 and 1984–2013 and red text indicates differences between these periods (a star indicates statistical significance at the 5% level)
