The retreat of Arctic sea ice has been so dramatic over the last few years thatatlases are being change . Now it turns out Greenland ’s meth sheet are also melting quicker than we thought — not on the seeable surface , but due to currents deep below the ocean .
While the loss of polar sea frappe is perturbing , the hidden melting of Greenland ’s ice is of greater concern . That ’s because these continental ice sheets and glacier hold up to 90 percent of our fresh water on Earth . NASA put together a video today to foreground how their research worker discovered the nuclear meltdown .
As Greenland ’s ice warms in the summer , it pushes its manner down through fjords and towards the sea , where some of it breaks off into the sea . This is , of trend , befall at an accelerated charge per unit , too — aniceberg the size of Manhattancalved off of Greenland last workweek . When the ice hits the ocean at ocean floor , it does n’t unfreeze that quickly — the water is literally internal-combustion engine - insensate . But as NASA glaciologists bet deeper beneath the water , they saw that the thicker methamphetamine sheets were being carved away quicker and more dramatically than they expected by tender current fight up from the tropics .
Yesterday we learned that the Earth ’s sea story are locked into aninevitable 3 - foot riseeven without any intervention . lose all of Greenland ’s ice would mechanically bring up the sea spirit level another 23 feet . Oceans Melting Greenland(yep , OMG ) is a new NASA enterprise that will take the way that mood modification is affect Greenland ’s ice — and how we can terminate its devastation .
[ NASA ]
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