Ocean warming may well turn out to be the greatest hidden challenge of our generation. This report represents the most comprehensive review to date on ocean warming. To build up the report, leading scientists from around the world were invited to join with colleagues to contribute individual chapters.  It contains many recommendations from the scientists on capability gaps and research issues that need to be resolved if we are to tackle the impacts of ocean warming with greater confidence in the future.

The devastating impacts of climate change are already being felt around the globe, threatening sustainable development and resilience, impairing socioeconomic development and reinforcing cycles of poverty. Scientists are increasingly able to confidently attribute the increased intensity and frequency of extreme weather events – such as droughts, heatwaves, floods and cyclones – to human-induced climate change.