Results of Marine Radioecological Study of Fjords of Western Spitsbergen

Matishov, Gennady G; Ilyin, G.V.; Usyagina, I. S.; Valuyskaya, D. A.; Deryabin, Alexey

doi:10.1134/s1028334x18050252

Cited by 2 publications

(1 citation statement)

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“…The considered model can be a tool for estimating contamination and corresponding dose estimates in the event of potential accidents related to sunken submarines and dumped radioactive material. An important model application is predicting contamination due to climate warming when radionuclides buried in glaciers leak into the sea as a result of glacial melting (Miroshnikov et al, 2017;Zaborska, 2017;Matishov et al, 2018). In addition, significant changes in the circulation and corresponding transport of radionuclides in the North Atlantic and Arctic oceans should be expected (Johannessen et al, 2010) due to climate warming.…”

Section: Discussionmentioning

confidence: 99%

Transport and Fate of 137Cs Released From Multiple Sources in the North Atlantic and Arctic Oceans

Maderich

Kim

Jung³

et al. 2021

Front. Mar. Sci.

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The North Atlantic and Arctic oceans, along with the North Pacific, are the main reservoirs of anthropogenic radionuclides introduced in the past 75 years. The POSEIDON-R compartment model was applied to the North Atlantic and Arctic oceans to reconstruct 137Cs contamination in 1945–2020 due to multiple sources: global fallout, exchange flows with other oceans, point-source inputs in the ocean from reprocessing plants and other nuclear facilities, the impact of the Chernobyl accident and secondary contamination resulting from river runoff and redissolution from bottom sediments. The model simulated the marine environment as a system of 3D compartments comprising the water column, bottom sediment, and biota. The dynamic model described the transfer of 137Cs through the pelagic and benthic food chains. The simulation results were validated using the marine database MARIS. The calculated concentrations of 137Cs in the seaweed and non-piscivorous and piscivorous pelagic fish mostly followed the concentration of 137Cs in water. The concentration in coastal predator fish lagged behind the concentration in water as a result of a diet that includes both pelagic and benthic organisms. The impact of each considered source on the total concentration of 137Cs in non-piscivorous fish in the regions of interest was analyzed. Whereas the contribution from global fallout dominated in 1960–1970, in 1970–1990, the contribution of 137Cs released from reprocessing plants exceeded the contributions from other sources in almost all considered regions. Secondary contamination due to river runoff was less than 4% of ocean influx. The maximum total inventory of 137Cs in the Arctic Ocean (31,122 TBq) was reached in 1988, whereas the corresponding inventory in the bottom sediment was approximately 6% of the total. The general agreement between simulated and observed 137Cs concentrations in water and bottom sediment was confirmed by the estimates of geometric mean and geometric standard deviation, which varied from 0.89 to 1.29 and from 1.22 to 1.87, respectively. The approach used is useful to synthesize measurement and simulation data in areas with observational gaps. For this purpose, 13 representative regions in the North Atlantic and Arctic oceans were selected for monitoring by using the “etalon” method for classification.

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