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It has long been a source of disquiet among global warming skeptics that the Pentagon won't heed their conspiracy theories. For good reason, of course. The latest signal of the Department of Defense's impatience with shoddy analysis came earlier this month, in a report concluding that climate change presents an immediate threat to national security.
One small city in South Florida is willing to secede from the state if it means the threat of sea level rise will finally be taken seriously. The city commission of South Miami, FL - a city that sits just west of the University of Miami in Coral Gables - passed a resolution this week that calls for Florida to be split into a North Florida and a South Florida, a creation of an additional state that would allow South Florida to take climate change preparation and adaptation into its own hands.
Environmental Protection Agency (EPA) Administrator Gina McCarthy visited Miami Beach recently to raise awareness about the need to “stop global warming” in order to save the region from dangerous sea-level rise.

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News of Climate Change

The complete melt of the Greenland ice sheet could occur at lower global temperatures than previously thought, a study in the journal Nature Climate Change showed on Sunday, increasing the threat and severity of a rise in sea level. Substantial melting of land ice could contribute to long-term sea level rise of several meters, potentially threatening the lives of millions of people.
“Our study shows that a temperature threshold for melting the (ice sheet) exists and that this threshold has been overestimated until now,” said scientists at the Potsdam Institute for Climate Impact Research and the Universidad Complutense de Madrid, who used computer simulations of the ice sheet's evolution to predict its future behaviour. A complete ice sheet melt could happen if global temperatures rose between 0.8 and 3.2 degrees Celsius above pre-industrial levels, with a best estimate of 1.6 degrees, the scientists said. Previous research has suggested the ice sheet could melt in a range of a 1.9 to 5.1 degree temperature rise, with a best estimate of 3.1 degrees.

One-twentieth of the world's ice is in Greenland, which is about a quarter of the size of the United States and about 80 percent of it is covered by the ice sheet. If it all melted it would be equivalent to a 6.4 meter global sea level rise, previous research has shown. "If the global temperature significantly overshoots the threshold for a long time, the ice will continue melting and not regrow - even if the climate would, after many thousand years, return to its pre-industrial state,” said team leader Andrey Ganopolski at the Potsdam Institute for Climate Impact Research. Today, global warming of 0.8 degrees has already been recorded.

“The more we exceed the threshold, the faster it melts,” said Alexander Robinson, lead-author of the study. If the world takes no action to limit greenhouse gas emissions, the earth could warm by 8 degrees Celsius. “This would result in one fifth of the ice sheet melting within 500 years and a complete loss in 2,000 years,” he said. “This is not what one would call a rapid collapse. However, compared to what has happened in our planet's history, it is fast. And we might already be approaching the critical threshold. If temperature rise is limited to 2 degrees Celsius, a complete melt of the ice sheet could happen in 50,000 years, the study found.

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