Greenland melts faster than scientists who were previously believed, since istabet is increasing four times since 2003, new research has found.
Huge glaciers in Greenland deposit increasingly larger pieces of ice in the Atlantic where it melts. But researchers have found that the largest istab in the decade of 2003 actually originated in the southwestern part of the island, which is largely glacier-free.
This suggests that surface ice simply melts as global temperatures rise and causes migratory rivers of melt water to flow into the sea and push the sea levels up. Southwest Greenland, which was not previously considered as the source of the coastal towns, must "become an important future contributor to the rise in sea level", the research states.
"We knew we had a big problem raising rates for ice discharge from some major drainage boards," said Michael Bevis, the lead author of the paper and a professor of geodynamics at Ohio State University. "But now we recognize another serious problem: increasingly large quantities of ice mass will go like melt water as rivers flowing into the sea."
The research provides new evidence of the dangers of vulnerable coastal sites as diverse as Miami, Shanghai, Bangladesh and various Pacific islands, as climate change shrinks the world's land-based ice.
"All we can do is adapt and mitigate further global warming – it's too late because there is no effect," says Evidence. "This will lead to further sea rise. We see the ice hit a tipping point.
" We will see faster and faster sea level rise in the foreseeable future. Once you hit this tip, the only question is: How serious is it? "
The study, published in the Proceedings of the National Academy of Sciences, used data from Nasa's gravity recovery and climate experiment (known as Grace) and GPS stations scattered across Greenland to analyze changes in ice mass.
showed that Greenland lost about 280 billion tons of ice per year between 2002 and 2016, enough to raise the world's sea level by 0.03 inches annually.If the whole of Greenland's large ice, 3 km thick in places, had to melt, the world's sea level rise by seven meters or more than 20ft that drowns most coastal settlements.
The loss figure has not been uniform, where the ice melts four times faster in 2013 compared to 2003. The researchers said this was driven by rising global temperatures from man-made climate change as well as the North Atlantic Oscillation, a periodic weather phenomenon that brings warmer air to western Greenland 19659002] The fate of Greenland's great glaciers in the southeast and The northwest is long regarded as a key factor in the rise in global sea level, but the Ohio-led research suggests that the ice fields in the southwest of the island may prove to be an unexpectedly large source of melt water.
Researchers have gained a greater understanding of how the two massive ice masses on the planet, in Greenland and Antarctica, react to a warm sea and an atmosphere.
Arctic ice-cream ss have tripled since the 1980s with melting in places like Greenland and Alaska, giving the greatest incentive to the rise in sea level, while destabilizing the soil itself below the feet of four million people.
Antarctica becomes an increasing concern, however, with disappearing ice with the fastest speed in the recorded history. The world's largest ice volume is now losing around € 219 billion. Ice ice a year, a path that will contribute more than 25 cm to the overall global sea level rise in 2070. Should the whole of the West Antarctic ice collapse, sea levels would balloon by about 3.5 m, albeit over a longer timeframe.
"We heat the planet, it melts ice and it raises the sea level," said Richard Alley, geologist and glacier expert at Pennsylvania State University. Alley added that while there are uncertainties about future sea level rise "if the major ice sheets are changing faster than expected, they can run faster or much faster than expected."