Are ocean temperatures rising faster than their long-term trend?
Core argument: Global average sea surface temperatures have risen by just over 0.1C/0.2F per decade since 1970, about half the pace of atmospheric warming, with the increase over the past year closer to 0.2C/0.4F.
Average sea surface temperatures across the globe have been rising by just over 0.1C/0.2F per decade since 1970 — about half as fast as the atmosphere. The overall increase in the past year is closer to 0.2C/0.4F, with much more intense marine heatwaves in some regions. On August 1, average global sea surface temperatures reached an all-time high just short of 21C/70F, Europe’s Copernicus Climate Change Service says. This record is particularly disconcerting because March is usually the hottest month for the world’s oceans.



