Modelling Distribution and Estimation Of 137Cs Stock in the Black Sea after the Chernobyl Accident

Proceedings of the International Symposium "Engineering and Earth Sciences: Applied and Fundamental Research" dedicated to the 85th anniversary of H.I. Ibragimov (ISEES 2019) Pub Date : 2019-08-01 DOI:10.2991/ISEES-19.2019.10

S. Demyshev, A. Zapevalov, O. Dymova

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Abstract

The results of comparing the model fields of Cs concentration in the Black Sea and the data of observations after the Chernobyl accident are presented. Several radiological surveys were used, during which Cs concentrations in the upper sea layer were measured for a year after the accident. Simulation of evolution of the caesium concentration field is performed taking into account atmospheric precipitation. A power function of time is proposed to describe the change in the radionuclide flux from the atmosphere. It was found that there is good compliance between observations and the results of calculations (the discrepancy is less than 30%) concerning the Black Sea Rim Current and the Western Cyclonic Gyre. The maximum differences occur in the areas of anticyclonic vortices. The Cs stock in the Black sea was estimated for the period from 1986 to 1991. It is shown that the total content of radioactive caesium corresponds to real data according to the calculation results.

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切尔诺贝利事故后黑海137Cs存量的建模、分布和估计

本文介绍了黑海Cs浓度模型场与切尔诺贝利事故后观测资料的比较结果。研究人员使用了几次放射学调查，在此期间测量了事故发生一年后上层海洋中的铯浓度。模拟了大气降水条件下铯浓度场的演变过程。提出了一个时间的幂函数来描述来自大气的放射性核素通量的变化。结果表明，黑海环流和西部气旋环流的观测结果与计算结果吻合较好(误差小于30%)。最大的差异出现在反气旋涡旋区域。黑海的Cs种群是在1986年至1991年期间估计的。计算结果表明，放射性铯的总含量与实际数据相符。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of the International Symposium "Engineering and Earth Sciences: Applied and Fundamental Research" dedicated to the 85th anniversary of H.I. Ibragimov (ISEES 2019)

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