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|a Limits in detecting acceleration of ice sheet mass loss due to climate variability |h [electronic resource]. |
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|a [S.l.] : |b Macmillan Publishers Limited, |c 2013. |
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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 The Greenland and Antarctic ice sheets have been reported
to be losing mass at accelerating rates. If sustained, this
accelerating mass loss will result in a global mean sea-level
rise by the year 2100 that is approximately 43 cm greater
than if a linear trend is assumed. However, at present
there is no scientific consensus on whether these reported
accelerations result from variability inherent to the ice-sheet–
climate system, or reflect long-term changes and thus permit
extrapolation to the future. Here we compare mass loss trends
and accelerations in satellite data collected between January
2003 and September 2012 from the Gravity Recovery and
Climate Experiment to long-term mass balance time series
from a regional surface mass balance model forced by reanalysis
data. We find that the record length of spaceborne
gravity observations is too short at present to meaningfully
separate long-term accelerations from short-term ice sheet
variability. We also find that the detection threshold of mass
loss acceleration depends on record length: to detect an
acceleration at an accuracy within -10 Gt yr2, a period of 10
years or more of observations is required for Antarctica and
about 20 years for Greenland. Therefore, climate variability
adds uncertainty to extrapolations of future mass loss and
sea-level rise, underscoring the need for continuous long-term
satellite monitoring. |
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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 Limits in detecting acceleration of ice sheet mass loss due to climate variability |
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|a dpSobek |c Sea Level Rise |
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|u http://dpanther.fiu.edu/dpService/dpPurlService/purl/FI15062063/00001 |y Click here for full text |
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|3 FULL TEXT- Limits in detecting acceleration of ice sheet mass loss due to climate variability |u http://www.nature.com/ngeo/journal/v6/n8/full/ngeo1874.html |y Limits in detecting acceleration of ice sheet mass loss due to climate variability |
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|a http://dpanther.fiu.edu/sobek/content/FI/15/06/20/63/00001/FI15062063_thm.jpg |
