Radiocarbon age of last glacial Pacific deep water
Radiocarbon age of last glacial Pacific deep water
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DOI：
10.1038/335708a0
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发表时间：
1988-10
期刊：
影响因子：
64.8
通讯作者：
N. Shackleton;J. Duplessy;M. Arnold;P. Maurice;M. Hall;J. Cartlidge
中科院分区：
文献类型：
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作者：
N. Shackleton;J. Duplessy;M. Arnold;P. Maurice;M. Hall;J. Cartlidge
自从串联加速器质谱放射性碳测定的可能性出现以来，设想的最重要的项目之一就是调查深海放射性碳年龄的变化。实现这一目标的最初尝试2因生物扰动带来的困难而受阻，因为这些工作者使用的岩心V28-238的累积速率仅为1.5 cm kyr-1，因此强调需要在具有更高累积速率的岩心中工作。通过对TR 163 - 31 B岩芯冰川剖面的研究，我们发现，太平洋深水的通风年龄在末次冰期比现在大了约500年。
One of the most important projects envisaged ever since the possibility emerged of making tandem accelerator mass-spectrometric radiocarbon determinations has been that of investigating changes in the radiocarbon age of the deep ocean1. Initial attempts to achieve this2were thwarted by difficulties imposed by bioturbation, because these workers used core V28–238 with an accumulation rate of only ∼1.5 cm kyr−1, thus emphasizing the need to work in a core with a higher accumulation rate. Working in the glacial section of core TR163–31B with an accumulation of 10 cm kyr−1, we show here that the ventilation age of Pacific deep water was about 500 years greater in last glacial times than it is today.