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|a Retreat of Pine Island Glacier controlled by marine ice-sheet instability |h [electronic resource] |y English. |
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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 Over the past 40 years Pine Island Glacier in West Antarctica
has thinned at an accelerating rate, so that at present it is
the largest single contributor to sea-level rise in Antarctica. In
recent years, the grounding line, which separates the grounded
ice sheet from the floating ice shelf, has retreated by tens
of kilometres. At present, the grounding line is crossing a
retrograde bedrock slope that lies well below sea level, raising
the possibility that the glacier is susceptible to the marine
ice-sheet instability mechanism. Here, using three state-ofthe-
art ice-flow models, we show that Pine Island Glacier’s
grounding line is probably engaged in an unstable 40 km
retreat. The associated mass loss increases substantially over
the course of our simulations from the average value of
20 Gt yr1 observed for the 1992–2011 period4, up to and above
100 Gt yr1, equivalent to 3.5–10mm eustatic sea-level rise
over the following 20 years. Mass loss remains elevated from
then on, ranging from 60 to 120 Gt yr1. |
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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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|a dpSobek |c Sea Level Rise |
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|u http://dpanther.fiu.edu/dpService/dpPurlService/purl/FI15062149/00001 |y Click here for full text |
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|a http://dpanther.fiu.edu/sobek/content/FI/15/06/21/49/00001/FI15062149thm.jpg |
