Extreme lowering of deglacial seawater radiocarbon recorded by both epifaunal and infaunal benthic foraminifera in a wood-dated sediment core
Extreme lowering of deglacial seawater radiocarbon recorded by both epifaunal and infaunal benthic foraminifera in a wood-dated sediment core
复制标题
木年代沉积岩芯中动物区系和动物区系底栖有孔虫记录的冰下海水放射性碳的极端降低
作者：
P. Rafter;J. Herguera;J. Southon
抽象的。十多年来，海洋学家们一直在争论
沉积物微体化石记录的可靠性表明，
最后一次冰消期的海水放射性碳（14 C）-
这些观测表明海洋碳循环受到了严重破坏，
与大气中二氧化碳浓度的上升相一致。可能
这些记录中的缺陷包括年龄模型控制不佳，
底栖有孔虫物种和生物扰动。我们已经解决了这些问题，
利用冰川-间冰期表层底栖动物记录的关切
有孔虫14C的理想沉积年龄模型（木材校准
至大气14C）。我们的研究结果证实了--但有重要的警告--
这些微化石档案的真实性，并证实了以前的观察
高度枯竭的海水14 C在中间深度，
冰消期东北太平洋
Abstract. For over a decade, oceanographers have debated the interpretation
and reliability of sediment microfossil records indicating extremely low
seawater radiocarbon (14C) during the last deglaciation –
observations that suggest a major disruption in marine carbon cycling
coincident with rising atmospheric CO2 concentrations. Possible
flaws in these records include poor age model controls, utilization of mixed
infaunal foraminifera species, and bioturbation. We have addressed these
concerns using a glacial–interglacial record of epifaunal benthic
foraminifera 14C on an ideal sedimentary age model (wood calibrated
to atmosphere 14C). Our results affirm – with important caveats –
the fidelity of these microfossil archives and confirm previous observations
of highly depleted seawater 14C at intermediate depths in the
deglacial northeast Pacific.
影响因子：
16.6
作者：
Zhao N;Keigwin LD
通讯作者：
Keigwin LD
影响因子：
18.3
作者：
Barker, Stephen;Knorr, Gregor;Skinner, Luke C.
通讯作者：
Skinner, Luke C.