James E. Hansen wiped sweat from his brow. Outside it was a record-high 98 degrees on June 23, 1988, as the NASA scientist testified before the Senate Committee on Energy and Natural Resources during a prolonged heat wave, which he decided to cast as a climate event of cosmic significance. He expressed to the senators his “high degree of confidence” in “a cause-and-effect relationship between the greenhouse effect and observed warming.” With that testimony and an accompanying paper in the Journal of Geophysical Research,... … [Read more...] about Thirty Years On, How Well Do Global Warming Predictions Stand Up?
Global warming predictions
Polar bears and other marine species could be wiped out within 40 years as global warming continues to rapidly heat the world’s oceans, new research warns. Experts have called for emergency action to cut emissions and use cleaner energy in a bid to save treasured wildlife from destruction. The research predicts affected oceans will warm by 2.8C by 2100. But life in Marine Protected Areas could start becoming extinct as early as 2050. MPAs were set up as havens for threatened species such as polar bears and penguins. But if emissions continue at the rate they are now, the areas will become “uninhabitable” because of a lack of food and living space. Coral reefs also face destruction. Study chief Professor John Bruno, of the University of North Carolina at Chapel Hill, said: “With warming of this magnitude, we expect to lose many, if not most, animal species from Marine Protected Areas by the next century. “To avoid the worst … [Read more...] about Polar bears will be extinct in 40 years thanks to global warming, study warns
Global warming is set to wipe out “many if not most” of the animals living in protected parts of the world’s oceans by the end of the century, scientists predict.Polar bears and penguins are among the species under greatest threat, even if carbon emission trends remain unchanged.Current “business-as-usual” projections suggest that by 2100 Marine Protected Areas (MPAs) will be 2.8C warmer than they are today.That is enough to make the conservation zones uninhabitable for many of the fish, mammals, birds and invertebrates now dwelling within them, say the researchers.There are 8,236 MPAs around the world, covering 4% of the total surface of the oceans.They were set up to provide safe havens for wildlife and conserve endangered habitats by restricting human activities such as fishing, mining and tourism.The new study published in the journal Nature Climate Change suggests that without drastic action MPAs will be “devastated” by rapid global … [Read more...] about Global warming raises fears of extinction in Marine Protected Areas
Two years after a long-lasting undersea heat wave scalded large sections of the Great Barrier Reef, scientists have now found that because so many corals died, much of the reef has likely been altered "forever." "What we just experienced is one hell of a natural selection event," said Terry Hughes, director of the Australian Research Council Center of Excellence for Coral Reef Studies at James Cook University in Queensland. In a notably blunt study in the journal Nature - laden with words like "unprecedented," "radical" and "catastrophic" - Hughes and 15 colleagues report that in 2016 alone, about 30 percent of the Great Barrier Reef's corals were lost, with the most severe damage in the isolated northern sector. (In 2017, another ocean heat wave claimed another roughly 20 percent of corals, Hughes said.) Many corals died faster than expected and at a lower level of sustained heat than had been predicted to be deadly. The researchers add that since losses in certain species were much … [Read more...] about Global warming has changed the Great Barrier Reef ‘forever,’ scientists say
WASHINGTON – Global warming is likely slowing the main Atlantic Ocean circulation, which has plunged to its weakest level on record, according to a new study. The slowdown in the circulation — a crucial part of Earth's climate — had been predicted by computer models, but researchers said they can now observe it. It could make for more extreme weather across the Northern Hemisphere, especially Europe, and could increase sea level rise along the U.S. East Coast, they said. The slowdown also raises the prospect of a complete circulation shutdown, which would be a dangerous "tipping point," according to a study in Wednesday's journal Nature . Such a shutdown was the premise of the scientifically inaccurate 2004 disaster movie "The Day After Tomorrow." Study authors said a collapse is at least decades away but would be a catastrophe. "We know somewhere out there is a tipping point where this current system is likely to break down," said study co-author Stefan Rahmstorf, a … [Read more...] about Study: Global warming is weakening key ocean circulation