Marine heatwaves are human made

This data image shows the monthly average sea surface temperature for May 2015.
This data image shows the monthly average sea surface temperature for May 2015. Between 2013 and 2016, a large mass of unusually warm ocean water - nicknamed the Blob - dominated the North Pacific, indicated here by red, pink, and yellow colors signifying temperatures as much as three degrees Celsius higher than average. Data are from the NASA Multi-scale Ultra-high Resolution Sea Surface Temperature (MUR SST) Analysis product. © Courtesy NASA Physical Oceanography Distributed Active Archive Center
This data image shows the monthly average sea surface temperature for May 2015. Between 2013 and 2016, a large mass of unusually warm ocean water - nicknamed the Blob - dominated the North Pacific, indicated here by red, pink, and yellow colors signifying temperatures as much as three degrees Celsius higher than average. Data are from the NASA Multi-scale Ultra-high Resolution Sea Surface Temperature (MUR SST) Analysis product. Courtesy NASA Physical Oceanography Distributed Active Archive Center - Heatwaves in the world's oceans have become over 20 times more frequent due to human influence. This is what researchers from the Oeschger Centre for Climate Research at the University of Bern are now able to prove. Marine heatwaves destroy ecosystems and damage fisheries. A marine heatwave (ocean heatwave) is an extended period of time in which the water temperature in a particular ocean region is abnormally high.
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