Simmone Shah in Time Magazine:
The exact moment when Earth will reach its tipping points—moments at which human-induced climate change will trigger irreversible planetary changes—has long been a source of debate for scientists. But they might be closer than we think. A report published today says that the Earth has passed its first climate tipping point. The second “Global Tipping Points” report published by the University of Exeter found that warm-water coral reefs are passing their tipping point. Rising ocean temperatures, acidification, overfishing, and pollution are combining to cause coral bleaching and mortality, meaning that a large number of coral reefs will be lost unless the global temperature returns towards 1°C warming or below.
“We’re in a new climate reality,” said Tim Lenton, founding director at the Global Systems Institute at the University of Exeter, who led the report. “We’ve crossed a tipping point in the climate system, and we’re now sure we’re going to carry on through 1.5°C of global warming above the prior industrial level, and that’s going to put us in the danger zone for crossing more climate tipping points.” The planet is predicted to cross the 1.5°C threshold within the next 5 years, according to a report from the World Meteorological Organization. Once that threshold is reached, the planet will see more frequent and intense extreme weather and strains on food production and water access—impacts many nations vulnerable to climate change are already seeing.
More here.
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