Chronologies are an essential tool to place natural archives of environmental changes on a calendar scale. Because of this, studies that compare and assess the accuracy and precision of available dating models are essential. ²¹⁰Pb is a radioactive isotope which is used to date recent sediments (<150 yr). Here we contrast the chronologies resulting from two different ²¹⁰Pb dating models: the Constant Flux model (also known as the Constant Rate of Supply model) and the recently developed Bayesian Plum model. This comparison was implemented by using four sediment cores from contrasting environmental settings, and showed several benefits of using a Bayesian approach. This allows to infer variables, such as the supported levels of ²¹⁰Pb, crucial to the chronology and commonly estimated through either samples where an asymptotic behaviour is observed or through ²²⁶Ra measurements, which themselves contain some level of uncertainty. Another step of traditional methods is the selection of the equilibrium depth in order to calculate total inventories, which carries strong consequences for the resulting age depth model. Plum, on the other hand, infers the ²¹⁰Pb flux, which eliminates the need to select an equilibrium depth and allows for dating cores with incomplete inventory. When traditional methods address cores with missing inventory, ¹³⁷Cs time markers are commonly used to correct the chronology, but Plum can use these time markers to improve the chronology and to reduce the uncertainty. These aspects show that the Bayesian approach results in more robust and objective chronologies, and thus in better reconstructions of environmental change over the past centuries.

年表是将自然环境变化档案保存在日历范围内的重要工具。因此，比较和评估可用约会模型的准确性和精确性的研究至关重要。²¹⁰ Pb是一种放射性同位素，可用于记录最近的沉积物（<150年）。在这里，我们对比了两种不同的²¹⁰ Pb测年模型产生的时间顺序：恒定通量模型（也称为恒定供给速率模型）和最近开发的贝叶斯梅花模型。通过使用来自不同环境设置的四个沉积物岩心进行了此比较，并显示了使用贝叶斯方法的一些好处。这允许推断变量，例如²¹⁰的支持级别Pb对时序至关重要，通常通过观察到渐近行为的样本或通过²²⁶ Ra测量值（通常包含不确定性水平）来估算。传统方法的另一步骤是选择平衡深度以计算总库存量，这对所得的年龄深度模型会产生重大影响。另一方面，Plum推断出²¹⁰ Pb的通量，这消除了选择平衡深度的需要，并允许对不完整存量的岩心进行测年。当传统方法处理缺少库存的内核时，通常使用¹³⁷ Cs时间标记来更正年代，但是Plum可以使用这些时间标记来改善时间顺序并减少不确定性。这些方面表明，贝叶斯方法产生了更健壮和客观的时间顺序，从而在过去几个世纪中对环境变化进行了更好的重构。