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| Main Authors: | , , , , |
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| Format: | Artículo científico |
| Language: | en |
| Published: |
Marine pollution bulletin
2026
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| Subjects: | |
| Online Access: | https://pubmed.ncbi.nlm.nih.gov/41719629/ |
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Table of Contents:
- Plutonium radioisotopes in the surface bottom sediments of the Norwegian and Barents seas. Paraskiv, A A V Yu, Proskurnin Tereshchenko, N N Vakhrushev, M O Gurov, K I Plutonium Geologic Sediments Norway Radiation Monitoring Water Pollutants, Radioactive Oceans and Seas This study investigates the spatial distribution and sources of plutonium radioisotopes (Pu and Pu) in the surface (0-5 cm) bottom sediments of the Norwegian and Barents Seas. The highest Pu activity concentrations were identified north of Novaya Zemlya archipelago and reached 2314 ± 178 mBq·kg. Notably, the activity concentration measured at the site of the nuclear submarine Komsomolets sinking (584 ± 45 mBq·kg) was consistent with background levels, showing no evidence of elevated plutonium content. The spatial distribution of plutonium radioisotopes is governed by proximity to sources, hydrological conditions, and seabed topography. The Pu/Pu activity ratios indicate that 87-98% of the plutonium radioisotope contamination in the bottom sediments of the Norwegian and Barents Seas is attributable to global radioactive fallout. Accumulation in troughs and depressions highlights the role of local sedimentary processes. These findings underscore the complex interplay of local and global sources in controlling plutonium distribution in Arctic marine sediments.