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Melting Antarctic ice is slowing Earth ’s strongest ocean current , fit in to a new study .
The inflow of cold meltwater could slow the Antarctic Circumpolar Current by up to 20 % by 2050 , researcher reported March 3 in the journalEnvironmental Research Letters . The slowdown could regard ocean temperatures , sea level hike and Antarctica ’s ecosystem , the team articulate .
The Antarctic Circumpolar Current is the strongest ocean current on Earth.
The Antarctic Circumpolar Current , which swirls clockwise around Antarctica , transports around a billion liters ( 264 million gal ) of water system per second . It keeps warmer pee away from the Antarctic Ice Sheet and connects the Atlantic , Pacific , Indian and southerly ocean , providing a pathway for warmth exchange between these bodies of water .
Climate changehas caused Antarctic ice to melt rapidly in recent years , adding an influx of reinvigorated , cold water system to the Southern Ocean . To research how this inflow will impress the Antarctic Circumpolar Current ’s strong point and circulation , Bishakhdatta Gayen , a fluid mechanist at the University of Melbourne in Australia , and his colleagues used Australia ’s fast supercomputer and mood simulator to pose interactions between the sea and the ice sheet .
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Fresh , insensate meltwater in all likelihood de-escalate the current , the squad found . The meltwater dilute the surrounding seawater and slow up convection between surface water supply and deep body of water near the methamphetamine hydrochloride bed sheet . Over clip , the inscrutable Southern Ocean will warm up as convection brings less dusty pee from the open . Meltwater also makes its way far north before drop down . Together , these change affect the density profile of the world ’s oceans , which drives the lag .
Such a retardation could let more warm water to reach the Antarctic Ice Sheet , thereby exacerbating the thawing that ’s already been observed . In addition to kick in to sea spirit level wage increase , this could add even more meltwater to the Southern Ocean and weaken the Antarctic Circumpolar Current further .
The Antarctic Circumpolar Current also acts as a roadblock against invasive species by train non - native plants — and any animal hitching a ride on them — forth from the continent . If the current slows or weakens , this barrier could become less effective .
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" It ’s like a merry - go - round . It keep on moving around and around , so it takes a long time to come back to Antarctica , " Gayen enjoin . " If it slow down down , what will happen is , matter can transmigrate very quickly to the Antarctic coastline . "
It ’s hard to say when we ’ll start to feel the effects — if we have n’t started feel them already . The Antarctic Circumpolar Current has n’t been monitor very long because it ’s in such a remote location , Gayen told Live Science . To better differentiate warming - induced changes from baseline condition , " we need a long - term record , " he said .
The core of the lag will be felt even in other oceans . " This is where the ocean tenderness sit , " Gayen aver . " If something stop there , or something unlike is go on , it ’s going to bear upon each and every sea circulation . "
Antarctica quiz:Test your knowledge on Earth’s frozen continent
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