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Natural decrease of the intensity level of artificial radioactive isotopes in the Barents Sea

Natural decrease of the intensity level of artificial radioactive isotopes in the Barents Sea The results of radioecological investigations carried out within the framework of the Russian-Finnish high-latitude expedition in 2007 are presented. The characteristics of the present-day accumulation level of the significant radioecological isotopes 137 Cs, 90 Sr and 239,240 Pu in the Barents Sea are described. The comparative analysis is performed for the radiation pollution of the environment in the 1980s and 1990s and in the first decade of the 21st century. Natural purification processes in the marine environment are the main factors of the decrease in the intensity level of artificial radioactive isotopes. These processes include repeated dilution, nuclear decay, occlusion by sediments and suspended solid material, and accumulation by aquatic inhabitants. A stable decreasing trend is observed for the intensity level of artificial radioactive isotopes in the Barents Sea. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Doklady Earth Sciences Springer Journals
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