"For many decades, the world's #oceans have been the Earth's 'get-out-of-jail card' when it comes to #ClimateChange.
Not only do they absorb around a quarter of the carbon dioxide that humans produce, they also soak up around 90% of the excess heat.
But over the past year, the oceans have displayed the most concerning evidence yet that they are struggling to cope, with the sea surface particularly feeling the heat."
