Great Barrier Reef: Australia confirms new mass bleaching event - BBC News

 

It is the fourth time in six years that such severe and widespread damage has been detected. which is caused by warm sea temperatures Only two bleaching incidents were recorded until 2016.

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Scientists say urgent action on climate change is needed if the world's largest coral reef system can survive.There is particular concern that the bleaching event occurred the same year as the La Niña weather phenomenon.

Usually in Australia, La Niña has cooler temperatures.Scientists fear the potential damage from the next El Niño.The announcement was made by the Great Barrier Reef Marine Park Authority, which conducted aerial surveys.

It recently warned that water temperatures in parts of the reef were 4C above the March average.The Great Barrier Reef stretches more than 2,300 km (1,400 miles) off the northeast coast of Australia. It is one of the most biodiverse ecosystems in the world.