Great Barrier Reef bleaching correlates with global warming

Scientists in Australia have warned that the Great Barrier Reef is under severe threat due to the highest ocean temperatures in 400 years. Research published on Thursday indicates a significant rise in water temperatures surrounding the world’s largest reef, primarily attributed to human-induced climate change. This long-term study, which analyzed core samples from coral to track ocean temperatures since 1618, revealed a consistent warming trend starting in 1900.

The Great Barrier Reef, stretching 2,400 km off Queensland’s coast, has endured five summers of extensive coral bleaching since 2016. These events coincide with some of the warmest years recorded over the past four centuries. Benjamin Henley, a researcher from the University of Melbourne, described the ongoing damage to the reef as a global tragedy. He emphasized the recent findings from January to March of this year, noting these temperatures were unprecedentedly high.

In response to these findings, experts have highlighted the critical role coral reefs play in protecting shorelines and supporting marine biodiversity. They also generate significant tourism revenue, with the Great Barrier Reef alone contributing approximately US$4.2 billion annually to Australia’s economy. However, despite these benefits, the reef is not listed as endangered by UNESCO, although it has been recommended.

Countries around the globe have reported similar coral bleaching events, prompting calls for increased action against climate change. Lissa Schindler of the Australian Marine Conservation Society has urged Australia to escalate its efforts in reducing greenhouse gas emissions to safeguard this vital natural resource.