Equatorial Pacific seawater pCO2 variability since the last glacial period

TitleEquatorial Pacific seawater pCO2 variability since the last glacial period
Publication TypeJournal Article
Year of Publication2019
AuthorsKubota, K, Yokoyama, Y, Ishikawa, T, Sagawa, T, Ikehara, M, Yamazaki, T
JournalScientific Reports
Volume9
Issue1
Date PublishedJan-12-2019
Abstract

The ocean may have played a central role in the atmospheric pCO2 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 pCO2 reconstruction for the western equatorial Pacific Ocean based on boron isotope analysis—a seawater pCO2 proxy—using two species of near-surface dwelling foraminifera from the same marine sediment core. The results indicate that the region remained a modest CO2 sink throughout the last deglaciation.

URLhttp://www.nature.com/articles/s41598-019-49739-0
DOI10.1038/s41598-019-49739-0