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Loss of Carbon from the Deep Sea Since the Last Glacial Maximum

Fig. S1b.  LGM carbonate ion concentration plot
Fig. S1b. LGM carbonate ion concentration
Loss of Carbon from the Deep Sea Since the Last Glacial Maximum

Vol. 330, pp. 1084-1087, 19 November 2010.
DOI: 10.1126/science.1193221

Jimin Yu1, Wally S. Broecker1, Harry Elderfield2, Zhangdong Jin3, Jerry McManus1, Fei Zhang3
1 Lamont-Doherty Earth Observatory of Columbia University, 61 Route 9W/Post Office Box 1000, Palisades, NY 10964-8000, USA.
2 The Godwin Laboratory for Palaeoclimate Research, Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK.
3 State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710075, China
Deep-ocean carbonate ion concentrations ([CO3 2-]) and carbon isotopic ratios (δ13C) place important constraints on past redistributions of carbon in the ocean-land-atmosphere system and hence provide clues to the causes of atmospheric CO2 concentration changes. However, existing deep-sea [CO3 2-] reconstructions conflict with one another, complicating paleoceanographic interpretations. Here, we present deep-sea [CO3 2-] for five cores from the three major oceans quantified using benthic foraminiferal boron/calcium ratios since the last glacial period. Combined benthic δ13C and [CO3 2-] results indicate that deep-sea-released CO2 during the early deglacial period (17.5 to 14.5 thousand years ago) was preferentially stored in the atmosphere, whereas during the late deglacial period (14 to 10 thousand years ago), besides contributing to the contemporary atmospheric CO2 rise, a substantial portion of CO2 released from oceans was absorbed by the terrestrial biosphere.
Download data from the WDC Paleo archive:
Deglacial Deep Ocean B/Ca Carbonate Ion Reconstructions, Text or Excel

To read or view the full study, please visit the Science website.
It was published in Science, Vol. 330, pp. 1084-1087, 19 November 2010. DOI: 10.1126/science.1193221
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