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|a A spurious jump in the satellite record |h [electronic resource] |b has Antarctic sea ice expansion been overestimated?. |
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|a [S.l.] : |b Copernicus Publications. |
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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 Recent estimates indicate that the Antarctic sea
ice cover is expanding at a statistically significant rate with
a magnitude one-third as large as the rapid rate of sea ice
retreat in the Arctic. However, during the mid-2000s, with
several fewer years in the observational record, the trend
in Antarctic sea ice extent was reported to be considerably
smaller and statistically indistinguishable from zero. Here,
we show that much of the increase in the reported trend occurred
due to the previously undocumented effect of a change
in the way the satellite sea ice observations are processed
for the widely used Bootstrap algorithm data set, rather than
a physical increase in the rate of ice advance. Specifically, we
find that a change in the intercalibration across a 1991 sensor
transition when the data set was reprocessed in 2007 caused a
substantial change in the long-term trend. Although our analysis
does not definitively identify whether this change introduced
an error or removed one, the resulting difference in
the trends suggests that a substantial error exists in either the
current data set or the version that was used prior to the mid-
2000s, and numerous studies that have relied on these observations
should be reexamined to determine the sensitivity
of their results to this change in the data set. Furthermore,
a number of recent studies have investigated physical mechanisms
for the observed expansion of the Antarctic sea ice
cover. The results of this analysis raise the possibility that
much of this expansion may be a spurious artifact of an error
in the processing of the satellite observations |
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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/FI15061020/00001 |y Click here for full text |
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|a http://dpanther.fiu.edu/sobek/content/FI/15/06/10/20/00001/Eisenman et al_2014_A spurious jump in the satellite recordthm.jpg |
