Coral on the Great Barrier Reef has regrown strongly after the big losses of 2016 and 2017, when water temperatures were significantly above the long-term average. While this is good news, it’s largely luck. The reef experienced mass bleaching in 2020 and 2022, but temperatures cooled just in time to prevent extensive coral deaths.
But the reef’s luck may be about to run out. Hotter El Niño conditions are returning to the Pacific, driving warmer ocean temperatures. The past few months have seen global temperature records smashed. Already, reefs in Florida, the Caribbean and parts of the Pacific are bleaching. The looming southern summer is a significant concern.
Can anything be done? Keeping emissions under control is obviously vital. But we can also support the Great Barrier Reef’s resilience by speeding up natural adaptation processes.
