N. Laverov Federal Centre for Integrated Arctic Research of Russian Academy of Sciences, 109 Severnoj Dviny Emb., Arkhangelsk 163000, Russia.
N. Laverov Federal Centre for Integrated Arctic Research of Russian Academy of Sciences, 109 Severnoj Dviny Emb., Arkhangelsk 163000, Russia.
Mar Pollut Bull. 2020 Nov;160:111571. doi: 10.1016/j.marpolbul.2020.111571. Epub 2020 Aug 28.
The article is devoted to the study of the activity values of natural radionuclides K, Th and Ra and technogenic radionuclide Cs in the bottom sediments of the Barents Sea, which is distinguished from the rest of the Arctic seas by the fact that the largest number of radiation objects are concentrated here. The activity levels of natural radionuclides were within the range of activity values corresponding to marine sediments around the world. The highest radionuclide activities were found within the deepwater shelf of the Barents Sea. The current level of activity of the technogenic radionuclide Cs is low and does not exceed 6.5 Bq·kg. However, due to global climatic changes, the secondary source of radiation pollution of the sea may be the Novaya Zemlya ice sheet, in which huge quantities of technogenic radionuclides were deposited during atmospheric tests of the 1950s and 1960s.
本文致力于研究巴伦支海底部沉积物中天然放射性核素 K、Th 和 Ra 以及人为放射性核素 Cs 的活度值，该海域与其他北极海域的不同之处在于，此处集中了数量最多的辐射源。天然放射性核素的活度水平处于与世界范围内海洋沉积物相对应的活度值范围内。在巴伦支海的深海陆架内发现了最高的放射性核素活度。人为放射性核素 Cs 的当前活度水平较低，不超过 6.5 Bq·kg。然而，由于全球气候变化，海洋辐射污染的次生来源可能是新地岛冰盖，在 20 世纪 50 年代和 60 年代的大气试验中，大量的人为放射性核素被沉积在那里。
