(Table S3b) 14C ages measured on Globigerinoides sacculifer of sediment core GeoB3910-1

#Jaeschke et al.. 2007; 14C ages from GeoB 3910-2. depths are correlated based on tuned Ti/Ca ratios (see Table S2).14C ages, 14C plateaus, and age conversion into calendar ages in three sediment cores from the tropical and subtropical South Atlantic. The ages of plateau boundaries were tuned to the calendar ages of (Suigetsu) atmospheric plateau boundaries. In between, calendar ages were deduced by linear interpolation. Beyond our suite of 14C plateaus 14C ages (marked with a star) were converted using Calib 7.0.4 [Stuiver and Reimer, 1993] with the Marine13 dataset [Reimer et al., 2013] and extrapolating the reservoir age of the next closest 14C plateau up- or downcore (accepting potential errors of this extrapolation). Note that our raw 14C ages were measured in three different 14C laboratories on closely spaced neighbor samples over an interval of almost two decades. Since neighbor ages closely agree, the ages probably reflect true 14C concentrations.Radiocarbon samples were analyzed at the facility for accelerator mass spectrometry (AMS) of the Leibniz Laboratory, University of Kiel, Germany (KIA numbers), and the Keck Carbon Cycle AMS facility (UCIAMS numbers), University of California, Irvine, USA.

Jaeschke等，2007；GeoB 3910-2岩芯的碳14年龄（14C ages）。深度基于调谐后的钛钙比（Ti/Ca ratios）进行关联（详见表S2）。热带及亚热带南大西洋三个沉积岩芯（sediment cores）中的碳14年龄、碳14平台期（14C plateaus）及年龄向日历年龄（calendar ages）的转换。平台期边界的年龄已校准至（诹访湖）大气平台期边界的日历年龄；其间的日历年龄通过线性插值（linear interpolation）推导得出。对于超出本研究碳14平台期序列的碳14年龄（以星号标记），使用Calib 7.0.4软件[Stuiver和Reimer，1993]结合Marine13数据集[Reimer等，2013]进行转换，并外推最接近的下一个碳14平台期的储库年龄至岩芯上部或下部（接受该外推的潜在误差）。需注意，我们的原始碳14年龄由三家不同的碳14实验室在近二十年的时间里对紧密相邻的样本进行测量；由于相邻样本的年龄高度一致，这些年龄可能反映了真实的碳14浓度。放射性碳样本在德国基尔大学莱布尼茨实验室的加速器质谱法（AMS）设施（KIA编号）及美国加州大学欧文分校的凯克碳循环AMS实验室（UCIAMS编号）进行分析。