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Cracks are snaking in two directions across the Brunt Ice Shelf on the northern coast of Antarctica . The fracturing ice shelf could shortly let go an iceberg lettuce about twice the sizing of New York City .
The future of the rest of the frappe ledge is n’t looking too promising , either .
Antarctica’s Brunt Ice Shelf could soon release a giant iceberg.
On Feb. 20,NASAEarth Observatory sharedimages of the ice shelf , comparing a satellite horizon from Jan. 23 to another image taken on Jan. 30 , 1986 . In the 2019 photograph , a recollective crack can be seen meandering south to north and spanning most of the shelf .
Another rift — dubbed " the Halloween crack " after its appearance in October 2016 — extends from west to east along the top of the persona . But the northward - traveling crack is more worrisome , as it is presently lengthening by about 3 mi ( 4 kilometers ) each class , Earth Observatory said . [ In exposure : Huge Icebergs Break Off Antarctica ]
That fracture has just a few stat mi to go before it reaches the Halloween crack . Once that befall , the shelf will put out an crisphead lettuce quantify roughly 660 hearty miles ( 1,700 straight km ) , more than twice the area of New York City ’s five borough and the biggest berg to separate from Brunt Ice Shelf since 1915 , according to Earth Observatory .
depend on where the cracks fuse , the constancy of the intact ledge could be jeopardized , Joe MacGregor , a glaciologist at NASA ’s Goddard Space Flight Center , told Earth Observatory .
jump global temperature have accelerated water ice loss in Antarctica , with the frozen continent spawning many hefty berg in recent years . One loom berg that separated from the Larsen C Ice Shelf in July 2017 was calculate to be aboutthe size of it of Delaware , and aneven bountiful icebergbroke off Pine Island Glacier in September of the same year .
Then , in October 2018 , Pine Island Glacier birthedanother massive iceberg , this one about five times as big as Manhattan . While the Pine Island Glacier is known for regularly dumping huge quantity of ice into the ocean , these events are now go on more ofttimes , raising concerns about how the calving could affect ocean - level rise in a warming world , Live Sciencepreviously reported .
Originally put out onLive Science .
