Tag: coral bleaching

Coral colonies at Cheeca Rocks in the Florida Keys show evidence of bleaching. Image credit: NOAA

AOML Leads Research Efforts Across Caribbean to Improve Bleaching Predictions

For the third time in recorded history, a massive coral bleaching event is unfolding throughout the world’s oceans, stretching from the Indian Ocean to the Caribbean. Above average sea surface temperatures exacerbated by a strong El Niño could result in the planet losing up to 4,500 square miles of coral this year alone, according to NOAA. The global event is predicted to continue to impact reefs into the spring of 2016.

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Projected timing in years of the onset of annual severe bleaching for the Florida Reef Tract and the Bahamas at ~11 km resolution. Note that regions in red and orange, such as the Dry Tortugas, are projected to bleach annually starting in the early 2030s, while the more northern stretch of the Florida Keys near Biscayne Bay, are projected to bleach annually in the mid-2040s.

Study Provides Local-scale Projections of Coral Bleaching Over the Next 100 Years

In a new study published April 1 in Global Change Biology, NOAA oceanographers and colleagues have developed a new method to produce high-resolution projections of the range and onset of severe annual coral bleaching for reefs in the Gulf of Mexico and Caribbean

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Bleached colony of Meandrina meandrites at Emerald Reef, Key Biscayne, FL. Image credit: NOAA

The Science Behind Coral Bleaching in the Florida Keys

2014 was a relatively warm summer in South Florida, and local divers noticed the effects of this sustained weather pattern. Below the ocean surface, corals were bleaching. In the month of August, the Coral Bleaching Early Warning Network, jointly supported by Mote Marine Lab and NOAA’s Florida Keys National Marine Sanctuary, received 34 reports describing paling or partial bleaching and an additional 19 reports indicating significant bleaching. Scientists continue to monitor the impact of this severe bleaching event to determine the extent of coral mortality.

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Coral ecologist Ian Enochs dives in the carbon dioxide bubbles of Maug's coral reefs (credit: Stephani Gordon/Open Boat Films/NOAA)

Volcanic Island of Maug Provides Natural Lab for Ocean Acidification

Maug is a unique natural laboratory that allows us to study how ocean acidification affects coral reef ecosystems. We know of no other area like this in U.S. waters. Increasing carbon dioxide in seawater is a global issue because it makes it harder for animals like corals to build skeletons.

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