Sediment dynamics play an important role in various aspects of earth system modeling. In this study, we developed a global sediment dynamics model that considers suspended sediment and bedload at short timescales. We validated suspended sediment from four observation stations in the Amazon River basin and over 60 observation stations from around the world based on a variable criteria such as availability of data samples. Our model was able to effectively reproduce seasonality and spatial distribution of suspended sediment flow. However, our global estimate of approximately 4 Bt/a was significantly lower than previous estimates; therefore, we discuss potential causes of this discrepancy, including target time period and discrepancies with previous extrapolated methods. Our newly developed sediment dynamics model could provide a better understanding of global sediment transfer and contributes to various related research fields such as coastal modeling and natural disasters.

泥沙动力学在地球系统建模的各个方面都起着重要作用。在这项研究中，我们开发了一个全球泥沙动力学模型，该模型考虑了短时间范围内的悬浮泥沙和床荷。我们根据可变的标准（例如数据样本的可用性）验证了来自亚马逊河流域四个观测站和来自全球60多个观测站的悬浮沉积物。我们的模型能够有效地再现悬浮泥沙流量的季节性和空间分布。但是，我们对全球约4 Bt / a的估计大大低于先前的估计；因此，我们讨论了这种差异的潜在原因，包括目标时间段和以前推断的方法之间的差异。