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|a Antarctic ice-sheet loss driven by basal melting of ice shelves |h [electronic resource] |y English. |
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|a [S.l.] : |b Macmillan Publishers Limited, |c 2012-04-26. |
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|a Nature Magazine Volume 484. |
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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 Accurate prediction of global sea-level rise requires that we
understand the cause of recent, widespread and intensifying1,2
glacier acceleration along Antarctic ice-sheet coastal margins3.
Atmospheric and oceanic forcing have the potential to reduce the
thickness and extent of floating ice shelves, potentially limiting
their ability to buttress the flow of grounded tributary glaciers4.
Indeed, recent ice-shelf collapse led to retreat and acceleration of
several glaciers on the Antarctic Peninsula5. But the extent and
magnitude of ice-shelf thickness change, the underlying causes of
such change, and its link to glacier flow rate are so poorly understood
that its future impact on the ice sheets cannot yet be predicted3.
Here we use satellite laser altimetry and modelling of the
surface firn layer to reveal the circum-Antarctic pattern of ice-shelf
thinning through increased basal melt. We deduce that this
increased melt is the primary control of Antarctic ice-sheet loss,
through a reduction in buttressing of the adjacent ice sheet leading
to accelerated glacier flow2. The highest thinning rates occur where
warm water at depth can access thick ice shelves via submarine
troughs crossing the continental shelf. Wind forcing could explain
the dominant patterns of both basal melting and the surface melting
and collapse of Antarctic ice shelves, through ocean upwelling
in the Amundsen6 and Bellingshausen7 seas, and atmospheric
warming on the Antarctic Peninsula8. This implies that climate
forcing through changing winds influences Antarctic ice-sheet
mass balance, and hence global sea level, on annual to decadal
timescales. |
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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 Antarctic ice-sheet loss driven by basal melting of ice shelves |
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|a dpSobek |c Sea Level Rise |
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|u http://dpanther.fiu.edu/dpService/dpPurlService/purl/FI15061814/00001 |y Click here for full text |
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|3 Host material |u http://www.nature.com/nature/journal/v484/n7395/full/nature10968.html |y Antarctic ice-sheet loss driven by basal melting of ice shelves |
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|a http://dpanther.fiu.edu/sobek/content/FI/15/06/18/14/00001/FI15061814_thm.jpg |
