Siberia occupies a significant part of the Eurasian continent and environmental changes in this region can have an important impact on the climate system of the Northern Hemisphere. The sediment flux of Siberian rivers is sensitive to changes in physical, chemical, and biological processes taking place on the continent, and these changes can be recorded in marine sediments on the Siberian Arctic Shelf. This paper presents data on grain-size distribution of the sediments, the sedimentation rates, and the mass accumulation rates on the shelf over the past 100 years. Age models are based on the decay rate of excess lead isotope ²¹⁰Pb, taking into account the sorption capacity of the marine sediments, and the presence of cesium isotope ¹³⁷Cs peaks in the sediment cores. The highest sedimentation and mass accumulation rates were observed prior to the 1920–40 and coincide with larger particle sizes, indicate a period of active sediment-laden sea ice and iceberg melt. Systematic decrease in the sedimentation and mass accumulation rates against the background of an increase in the proportion of silt fractions in the shelf sediments in the second half of the 20th century can be explained by an acceleration of the arctic hydrological cycle.

西伯利亚占据欧亚大陆的很大一部分，该地区的环境变化会对北半球的气候系统产生重要影响。西伯利亚河流的沉积物通量对大陆上发生的物理、化学和生物过程的变化很敏感，这些变化可以记录在西伯利亚北极大陆架的海洋沉积物中。本文介绍了过去 100 年来陆架上沉积物的粒度分布、沉积速率和质量积累速率的数据。年龄模型基于过量铅同位素²¹⁰ Pb 的衰变率，同时考虑到海洋沉积物的吸附能力以及铯同位素^137的存在沉积物岩心中的 Cs 峰。在 1920-40 年之前观察到最高的沉积率和质量积累率，并且与较大的粒径相吻合，表明一段时期充满沉积物的海冰和冰山融化。在 20 世纪下半叶陆架沉积物中淤泥部分比例增加的背景下，沉积和质量积累率的系统性下降可以用北极水文循环的加速来解释。