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|a High-resolution carbon dioxide concentration record 650,000-800,000 years before present |h [electronic resource]. |
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|a [S.l.] : |b Nature Publishing Group, |c 2008-05-18. |
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|a Nature Magazine Volume 453 |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 past atmospheric carbon dioxide concentrations can
be determined by measuring the composition of air trapped in ice
cores from Antarctica. So far, the Antarctic Vostok and EPICA
Dome C ice cores have provided a composite record of atmospheric
carbon dioxide levels over the past 650,000 years1–4. Here
we present results of the lowest 200m of the Dome C ice core,
extending the record of atmospheric carbon dioxide concentration
by two complete glacial cycles to 800,000 yr before present. From
previously published data1–8 and the present work, we find that
atmospheric carbon dioxide is strongly correlated with Antarctic
temperature throughout eight glacial cycles but with significantly
lower concentrations between 650,000 and 750,000 yr before present.
Carbon dioxide levels are below 180 parts per million by
volume (p.p.m.v.) for a period of 3,000 yr during Marine Isotope
Stage 16, possibly reflecting more pronounced oceanic carbon
storage. We report the lowest carbon dioxide concentration measured
in an ice core, which extends the pre-industrial range of
carbon dioxide concentrations during the late Quaternary by
about 10 p.p.m.v. to 172–300 p.p.m.v. |
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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. |z Vostok, Lake (Antarctica) |
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|a dpSobek |c Sea Level Rise |
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|u http://dpanther.fiu.edu/dpService/dpPurlService/purl/FI15052521/00001 |y Click here for full text |
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|a http://dpanther.fiu.edu/sobek/content/FI/15/05/25/21/00001/FI15052521_thm.jpg |