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A coral, severely bleached to white

NOAA Coral Reef Watch Provides Critical Early Warnings for the 2022 Mass Coral Bleaching Event on the Great Barrier Reef

For more than 20 years, NOAA Coral Reef Watch (CRW) has been the world’s leader in observing, predicting, and communicating changes in the coral reef environment to a diverse, global user community. In mid-December 2021, CRW’s daily global 5km-resolution satellite coral bleaching heat stress products detected a significant build-up of oceanic heat stress on the Great Barrier Reef (GBR), Australia. This signified the GBR was starting its 2021-2022 summer season with a much earlier onset of accumulated heat stress than ever recorded before. At the same time, CRW’s modeled Four-Month Coral Bleaching Heat Stress Outlook indicated the significant heat stress would continue, leading to a potential mass coral bleaching event on the GBR (following on the heels of confirmed mass bleaching events in 2016, 2017, and 2020).

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