美国国家海洋和大气管理局 (NOAA) 预测，由于气候变化和厄尔尼诺现象，将出现第四次大规模珊瑚白化事件，威胁大堡礁。 4th mass coral bleaching event predicted by NOAA due to climate change and El Niño, threatening the Great Barrier Reef.

据美国国家海洋和大气管理局（NOAA）称，世界可能面临第四次大规模珊瑚白化事件。 The world faces a potential fourth mass coral bleaching event, according to the US National Oceanic and Atmospheric Administration (NOAA). 由于气候变化和厄尔尼诺气候模式导致破纪录的海洋高温，海洋生物学家处于高度戒备状态。 Marine biologists are on high alert due to record-breaking ocean heat caused by climate change and the El Niño climate pattern. 南半球可能会经历大范围的白化，威胁大堡礁。 The Southern Hemisphere may experience widespread bleaching, threatening the Great Barrier Reef. NOAA 的珊瑚礁观察是珊瑚白化风险的全球监测机构。 NOAA's Coral Reef Watch serves as the global monitoring authority on coral bleaching risk.