Equatorial Pacific seawater pCO2 variability since the last glacial period
Equatorial Pacific seawater pCO2 variability since the last glacial period
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DOI：
10.1038/s41598-019-49739-0
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发表时间：
2019-09-25
影响因子：
4.6
通讯作者：
Yamazaki, Toshitsugu
中科院分区：
文献类型：
--
作者：
Kubota, Kaoru;Yokoyama, Yusuke;Yamazaki, Toshitsugu
在最后一次冰消期，海洋可能在大气pCO（2）上升中发挥了核心作用。然而，这一时期海洋和大气之间碳交换的证据仍然缺乏，阻碍了我们对冰川-间冰期时间尺度上全球碳循环的理解。在这里，我们报告了一个新的表面海水pCO（2）重建的基础上，硼同位素分析的海水pCO（2）代理使用两种近地表居住的有孔虫从同一海洋沉积物的核心。结果表明，该地区仍然是一个温和的CO2汇在整个最后一次冰消期。
The ocean may have played a central role in the atmospheric pCO(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 pCO(2) reconstruction for the western equatorial Pacific Ocean based on boron isotope analysis-a seawater pCO(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 CO2 sink throughout the last deglaciation.