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|a Ice plug prevents irreversible discharge from East Antarctica |h [electronic resource]. |
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|a [S.l.] : |b Macmillan Publishers Limited, |c 2014. |
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|a Nature Climate Change. |
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|a Please contact the owning institution for licensing and permissions. It is the user's responsibility to ensure use does not violate any third party rights. |
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|a Changes in ice discharge from Antarctica constitute the largest
uncertainty in future sea-level projections, mainly because of
the unknown response of its marine basins1. Most of West
Antarctica’s marine ice sheet lies on an inland-sloping bed
and is thereby prone to a marine ice sheet instability. A
similar topographic configuration is found in large parts of
East Antarctica, which holds marine ice equivalent to 19m
of global sea-level rise, that is, more than five times that
of West Antarctica. Within East Antarctica, the Wilkes Basin
holds the largest volume of marine ice that is fully connected
by subglacial troughs. This ice body was significantly reduced
during the Pliocene epoch. Strong melting underneath adjacent
ice shelves with similar bathymetry indicates the ice
sheet’s sensitivity to climatic perturbations. The stability of
the Wilkes marine ice sheet has not been the subject of any
comprehensive assessment of future sea level. Using recently
improved topographic data6 in combination with ice-dynamic
simulations,we showhere that the removal of a specific coastal
ice volume equivalent to less than 80mm of global sea-level
rise at the margin of theWilkes Basin destabilizes the regional
ice flow and leads to a self-sustained discharge of the entire
basin and a global sea-level rise of 3–4 m. Our results are robust
with respect to variation in ice parameters, forcing details and
model resolution as well as increased surface mass balance,
indicating that East Antarctica may become a large contributor
to future sea-level rise on timescales beyond a century. |
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|a Electronic reproduction. |c Florida International University, |d 2015. |f (dpSobek) |n Mode of access: World Wide Web. |n System requirements: Internet connectivity; Web browser software. |
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|t Ice plug prevents irreversible discharge from East Antarctica |
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|a dpSobek |c Sea Level Rise |
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|u http://dpanther.fiu.edu/dpService/dpPurlService/purl/FI15062111/00001 |y Click here for full text |
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|3 FULL TEXT- Ice plug prevents irreversible discharge from East Antarctica |u http://www.nature.com/nclimate/journal/v4/n6/full/nclimate2226.html |y Ice plug prevents irreversible discharge from East Antarctica |
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|a http://dpanther.fiu.edu/sobek/content/FI/15/06/21/11/00001/FI15062111_thm.jpg |
