Equatorial Pacific seawater pCO2 variability since the last glacial period

Abstract The ocean may have played a central role in the atmospheric p CO 2 rise during the last deglaciation. However, evidence on where carbon was exchanged between the ocean and the atmosphere in this period is still lacking, hampering our understanding of global carbon cycle on glacial–interglac...

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Published inScientific reports Vol. 9; no. 1; pp. 1 - 11
Main Authors Kubota, Kaoru, Yokoyama, Yusuke, Ishikawa, Tsuyoshi, Sagawa, Takuya, Ikehara, Minoru, Yamazaki, Toshitsugu
Format Journal Article
LanguageEnglish
Published London Nature Publishing Group 25.09.2019
Nature Publishing Group UK
Subjects
Boron
Carbon cycle
Carbon dioxide
Ocean currents
Seawater
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Summary:Abstract The ocean may have played a central role in the atmospheric p CO 2 rise during the last deglaciation. However, evidence on where carbon was exchanged between the ocean and the atmosphere in this period is still lacking, hampering our understanding of global carbon cycle on glacial–interglacial timescales. Here we report a new surface seawater p CO 2 reconstruction for the western equatorial Pacific Ocean based on boron isotope analysis—a seawater p CO 2 proxy—using two species of near-surface dwelling foraminifera from the same marine sediment core. The results indicate that the region remained a modest CO 2 sink throughout the last deglaciation.
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ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-019-49739-0