Deep reefs provide corals little refuge from extreme ocean heat

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A new study finds that deep reefs, once considered refuges for corals from climate change, are also exposed to increasingly intense marine heat waves. The reefs examined lie roughly 90 to 150 meters below the surface.

Once regarded as potential safe havens for corals in a warming climate, deep reefs, which lie at depths between 90 and 150 meters (295 and 490 feet), are no longer sheltered from increasingly intense marine heat waves, according to a new study in Geophysical Research Letters.