Climate.gov talks with scientific scuba diver and marine scientist Danielle Claar, an early career scientist with a passion for everything ocean—from tide pools to coral reefs.
As part of the State of the Climate in 2017 report, experts describe a record three-year-long episode of mass coral bleaching at tropical reefs worldwide. Previous global bleaching events required the presence of El Niño, but the devastating 2014–2017 event began before El Niño emerged and continued long after it ended—implicating human-caused global warming in the mass die offs.