This work provides a novel data set on accumulations of both anthropogenic (¹³⁷Cs, ²³⁸Pu, ^239+240Pu, ²⁴¹Am) and natural (²¹⁰Pb, ²²⁶Ra, ²³²Th) radionuclides and an element (K). Sampling of soils and lake sediments was accomplished in 1999 during Tundra Northwest (TNW-99) international expedition to a remote region of the Canadian Arctic. The sediment ages and sedimentation rates were determined. The obtained results overall indicated a high geographical diversity of contamination levels and trends. Accumulation rates were also differential, and a sediment focusing contribution was distinctly visible. Radioactive pollution was found to be lower relative to temperate counterparts. The activity ratios of anthropogenic radionuclides corresponded to global fallout as a prevailing source in the entire examined area. The post-Chernobyl radiocaesium was observed for the westernmost lake only. The elevated level of ¹³⁷Cs and ^239+240Pu in the topmost sediment at the northern and eastern Arctic Archipelago was attributed to recent resuspension and subsequent redistribution of radionuclides.

这项工作提供了有关人为（¹³⁷ Cs，²³⁸ Pu，^{239 + 240} Pu，²⁴¹ Am）和天然（²¹⁰ Pb，²²⁶ Ra，²³²）积累的新颖数据集Th）放射性核素和元素（K）。对土壤和湖泊沉积物的采样是在1999年Tundra Northwest（TNW-99）国际探险队到加拿大北极偏远地区进行的。确定了沉积物的年龄和沉积速率。总体而言，所获得的结果表明污染水平和趋势存在高度的地理差异。累积速率也不同，并且沉积物聚焦作用明显可见。发现放射性污染物相对于温带污染物较低。人为放射性核素的活度比值相当于在整个检查区域中作为主要污染源的全球辐射。后切尔诺贝利放射性铯仅在最西端的湖泊中观察到。¹³⁷ Cs和^{239 + 240}的升高水平北极群岛北部和东部最顶层沉积物中的Pu归因于放射性核素最近的重新悬浮和随后的重新分布。