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<DIV id=slugline jQuery1328238082537="3"><CITE><SPAN
class="slug-metadata-note ahead-of-print">Published Online <SPAN
class=slug-ahead-of-print-date>December 15 2011</SPAN><BR></SPAN><ABBR
class=slug-jnl-abbrev title=Science>Science</ABBR><SPAN class=slug-pub-date> 3
February 2012: </SPAN><BR><SPAN class=slug-vol>Vol. 335 </SPAN><SPAN
class=slug-issue>no. 6068 </SPAN><SPAN class=slug-pages>pp. 557-561
</SPAN><BR>DOI: <SPAN class=slug-doi
title=10.1126/science.1208163>10.1126/science.1208163 </SPAN></CITE></DIV>
<DIV> </DIV>
<DIV class="article abstract-view" jQuery1328238082537="5" sizset="0"
sizcache="1"><SPAN
class=highwire-journal-article-marker-start></SPAN> </DIV>
<DIV id=article-title-1><FONT size=4>The Southern Ocean’s Role in Carbon
Exchange During the Last Deglaciation</FONT></DIV>
<DIV id=contrib-1 class=contributor jQuery1328238082537="5" sizset="0"
sizcache="0"><SPAN class=name><A class=name-search
href="http://www.sciencemag.org/search?author1=Andrea+Burke&sortspec=date&submit=Submit">Andrea
Burke</A></SPAN><A id=xref-aff-1-1 class=xref-aff
href="http://www.sciencemag.org/content/335/6068/557.short#aff-1"
jQuery1328238082537="20"><SUP>1</SUP></A><SPAN class=xref-sep>,</SPAN><A
id=xref-aff-2-1 class=xref-aff
href="http://www.sciencemag.org/content/335/6068/557.short#aff-2"
jQuery1328238082537="21"><SUP>2</SUP></A><SPAN class=xref-sep>,</SPAN><A
id=xref-corresp-1-1 class=xref-corresp
href="http://www.sciencemag.org/content/335/6068/557.short#corresp-1">*</A>,
<SPAN class=name><A class=name-search
href="http://www.sciencemag.org/search?author1=Laura+F.+Robinson&sortspec=date&submit=Submit">Laura
F. Robinson</A></SPAN><A id=xref-aff-2-2 class=xref-aff
href="http://www.sciencemag.org/content/335/6068/557.short#aff-2"
jQuery1328238082537="22"><SUP>2</SUP></A><SPAN class=xref-sep>,</SPAN><A
id=xref-aff-3-1 class=xref-aff
href="http://www.sciencemag.org/content/335/6068/557.short#aff-3"
jQuery1328238082537="23"><SUP>3</SUP></A></DIV>
<DIV class=contributor jQuery1328238082537="5" sizset="0"
sizcache="0"><SUP>1</SUP>Massachusetts Institute of Technology/Woods Hole
Oceanographic Institution Joint Program in Oceanography, Mailstop 24, Woods
Hole, MA 02543, USA. <SUP>2</SUP>Department of Marine Chemistry and
Geochemistry, Woods Hole Oceanographic Institution, Mailstop 25, Woods Hole, MA
02543, USA. <SUP>3</SUP>School of Earth Sciences, University of Bristol, Wills
Memorial Building, Queen’s Road, Bristol BS8 1RJ, UK. E-mail: <A
href="mailto:aburke@whoi.edu">aburke@whoi.edu</A></DIV>
<DIV class=contributor jQuery1328238082537="5" sizset="0"
sizcache="0"> </DIV>
<DIV class="article abstract-view" jQuery1328238082537="5" sizset="0"
sizcache="1"><STRONG>Abstract</STRONG></DIV>
<DIV class="section abstract" jQuery1328238082537="5" sizset="0" sizcache="1">
<P id=p-3>Changes in the upwelling and degassing of carbon from the Southern
Ocean form one of the leading hypotheses for the cause of glacial-interglacial
changes in atmospheric carbon dioxide. We present a 25,000-year-long Southern
Ocean radiocarbon record reconstructed from deep-sea corals, which shows
radiocarbon-depleted waters during the glacial period and through the early
deglaciation. This depletion and associated deep stratification disappeared by
~14.6 ka (thousand years ago), consistent with the transfer of carbon from the
deep ocean to the surface ocean and atmosphere via a Southern Ocean ventilation
event. Given this evidence for carbon exchange in the Southern Ocean, we show
that existing deep-ocean radiocarbon records from the glacial period are
sufficiently depleted to explain the ~190 per mil drop in atmospheric
radiocarbon between ~17 and 14.5 ka. </P></DIV></FONT><BR>
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