Fukushima-derived radionuclides in ground-level air of Central Europe: A comparison with simulated forward and backward trajectories

摘要

Results of forward and backward modeling of air mass transport from Fukushima Daiichi nuclear power plant to Slovakia were compared with aerosol radioactivity measurements. Several radionuclide maxima (~(131)I, 134Cs and ~(137)Cs) were observed in the Bratislava ground-level air in March-April 2011. The ~(131)I/~(137)Cs activity ratio records showed the presence of two different fresh air masses in the Bratislava air, supported by simulations of forward and backward trajectories between Fukushima and Bratislava.