Summary of different models and date ranges for the Last Voyage (LV) Boundary.

The table shows the 68.3% and 95.4% hpd calendar date BCE (Cal BCE) ranges for the TPQ Boundary (Models 1A to 1C only) and LV Boundary from each of Models 1A-1C and 2A-2C, and the Difference query for the time period between the TPQ and the LV for Models 1A to 1C, along with OxCal Amodel (Am) and Aoverall (Ao) values across the 6 models, and comparing the values achieved with the new AMSAdjustedIntCal20 14C dataset (with curve resolution set at 5 years) versus those from IntCal20 (with curve resolution set a 1 year) in grey shading. The Am/Ao values for Model 1B are unsatisfactory (<60), indicating that this model’s assumptions are not compatible with the 14C data and the 14C calibration curve. For Model 1C, as an example, we also list the results if the AMSAdjustedIntCal20 14C dataset is used but with 1 year curve resolution (bold text). While the 1-year resolution model results overall are noisier (see S8 Fig), the findings for the TPQ and LV Boundaries are very similar to the 5-year resolution models. For Model 1C we list also the results employing the GrM and European oak adjusted overall dataset (see Fig 4B), ‘AMSAdjustedIntCal20_GrMbased’, in underlined text (see S9 Fig). Finally, for Model 1C, we list the results if the two apparently (subjectively) somewhat older 14C ages, for OxA-30953 and OxA-31033 (both have individual OxCal Agreement values <60, respectively 47 and 51: Fig 9), are excluded from the analysis (italicized text). This makes little difference. Since neither date is an outlier within the model (outlier probabilities respectively 4% and 3%, both <5%: Fig 9) we leave them in.

本表格展示了仅针对模型1A至1C的年代最前边界（TPQ Boundary）以及全部模型1A-1C、2A-2C的最晚边界（LV Boundary）的68.3%与95.4%最高后验密度（HPD）校准公元前（Cal BCE）日历年代区间，同时列出了模型1A至1C的年代最前边界与最晚边界之间时段的差值计算结果，以及6个模型的OxCal Amodel（Am）与Aoverall（Ao）值；并以灰色阴影对比了采用新型AMSAdjustedIntCal20 14C数据集（曲线分辨率设为5年）与采用IntCal20数据集（曲线分辨率设为1年）时得到的计算结果。模型1B的Am/Ao值未达要求（<60），表明该模型的假设与14C数据及14C校正曲线不兼容。以模型1C为例，我们还列出了采用AMSAdjustedIntCal20 14C数据集但曲线分辨率设为1年时的结果（以粗体标注）；尽管1年分辨率模型的整体结果噪声更大（详见补充材料图S8），但年代最前边界与最晚边界的结果与5年分辨率模型的结果极为相似。针对模型1C，我们还以下划线标注了采用GrM与欧洲栎校正的整体数据集（详见图4B）即"AMSAdjustedIntCal20_GrMbased"的结果（详见补充材料图S9）。最后，针对模型1C，我们以斜体标注了剔除两个经主观判断偏老的14C测年数据OxA-30953与OxA-31033（二者各自的OxCal一致性值分别为47与51，均<60，详见图9）后的分析结果；该操作对结果影响极小，由于这两个测年数据在模型中均不属于异常值（异常值概率分别为4%与3%，均<5%，详见图9），因此我们保留了这两个数据。