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|a Persistent link between solar activity and Greenland climate during the Last Glacial Maximum |h [electronic resource]. |
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|a [S.l.] : |b Macmillan Publishers Limited, |c 2014. |
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|a Nature Geoscience |b Letters. |
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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 solar activity have previously been proposed to
cause decadal- to millennial-scale fluctuations in both the
modern and Holocene climates1. Direct observational records
of solar activity, such as sunspot numbers, exist for only the
past few hundred years, so solar variability for earlier periods
is typically reconstructed from measurements of cosmogenic
radionuclides such as 10Be and 14C from ice cores and tree
rings2,3. Here we present a high-resolution 10Be record from
the ice core collected from central Greenland by the Greenland
Ice Core Project (GRIP). The record spans from 22,500 to
10,000 years ago, and is based on new and compiled data4–6.
Using 14C records7,8 to control for climate-related influences
on 10Be deposition, we reconstruct centennial changes in solar
activity. We find that during the Last Glacial Maximum, solar
minima correlate with more negative o18O values of ice and
are accompanied by increased snow accumulation and sea-salt
input over central Greenland. We suggest that solar minima
could have induced changes in the stratosphere that favour
the development of high-pressure blocking systems located
to the south of Greenland, as has been found in observations
and model simulations for recent climate9,10.We conclude that
the mechanism behind solar forcing of regional climate change
may have been similar under both modern and Last Glacial
Maximum climate conditions. |
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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/FI15042619/00001 |y Click here for full text |
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|a http://dpanther.fiu.edu/sobek/content/FI/15/04/26/19/00001/FI15042619_thm.jpg |
