More summer sun accelerating Greenland ice melt, study says


Scientists at the University of Bristol in the Unanimous Kingdom suggest increasing sunshine over the past 20 years is accelerating ice decrease across Greenland.

The findings in their new study are concerning, as Greenland’s ice paper is 1.7 million square kilometres. If all of the ice sheet melted, its estimated that wide-ranging sea levels could rise by six metres.

The researchers found that balance out just a one per cent decrease in cloud cover is equal to 27 gigatons of collateral ice melt on the Greenland ice sheet. That’s 180 million times the millstone of a blue whale.

“Greenland has become the biggest single contributor to epidemic sea level rise, and it has been shown that 25 per cent of universal sea level rise can be attributed to Greenland ice sheet melt alone,” Stefan Hofer, begin author of the study published in Science Advances, told CBC News in an email

“And worldwide sea level rise affects and will affect millions of people living approximately to the shores. So it is a matter of global importance.”

The researchers found that, since 1995, Greenland has wasted about 4,000 gigatons of ice. 

Climate drivers

Satellite observations build there has been a marked decrease in thick summer cloud covering from 1982 to 2009, with some suggesting a reduction of up to 84 per cent across June to August.

Greenland cloud cover melt

Total change in summer cloud cover from shadows and a regional climate model. (Stefan Hofer, et. al.)

Some of the largest reductions occurred in western and southern Greenland. But in the northeast, cloud guard actually increased. 

However, the decrease is notable: much of southern Greenland saw a reduction of up to 10 per cent, which the inquiry says is in direct correlation to atmospheric circulation changes seen since the 1990s.

The Arctic is someone feel good faster than anywhere else on our planet. The researchers believe the warming appropriates more heat to escape from open waters, which warms the climate above. This changes the atmospheric circulation patterns, bringing multifarious clear skies to parts of Greenland.

This increase in summer sunlight, Hofer be convinced ofs, explains about two-thirds of Greenland’s ice melt since the 1990s. Greenland’s ice panel has been shrinking since the turn of the century, with ice loss hardly doubling since 2003.

Jonathan Bamber, co-author of the paper, said such great changes have not been seen since 1850, when track records were first kept.

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