For 421 straight days, a marine heat wave in the North Atlantic broke — and sometimes shattered — daily temperature records.
The hot streak finally ended April 29, but scientists say the length of the marine heat wave wasn’t the only unsettling part. Another alarm bell was that daily temperature records often fell by a significant margin — on several occasions by more than 1 degree Fahrenheit.
“It’s not just that it was a consecutive string of 421 days,” said Brian McNoldy, an ocean scientist at the University of Miami. “But for so much of that time, it was breaking the records by a lot — not even close.”
And the North Atlantic is far from an outlier.
The world’s oceans — as a whole — are heating up. According to the European Union’s Copernicus Climate Change Service, monthly global sea surface temperatures have been at their warmest on record for 13 months in a row. Last year set a new annual record for global ocean heat.
Source: Record-Breaking Ocean Heat Wave Foreshadows a Dangerous Hurricane Season | Scientific American