Volume 13, No. 2, April 2013, Pages 537-544 PDF(2 MB)
Regional Dispersal of Fukushima-Derived Fission Nuclides by East-Asian Monsoon: A Synthesis and Review
Chih-An Huh1, Chuan-Yao Lin2, Shih-Chieh Hsu2
1 Institute of Earth Sciences, Academia Sinica, Taipei 115, Taiwan
2 Research Center for Environmental Changes, Academia Sinica, Taipei 115, Taiwan
The WRF/Chem tracer model is employed to simulate the dispersal of radiation plumes from Japan following the 12 March 2011 Fukushima Daiichi Nuclear Power Plant accident. From a direct comparison between the model simulation and the time-series of Fukushima-derived fission nuclides monitored around southeast Asia, we can distinguish between global transport by the Westerlies in the free troposphere and regional transport by the northeast monsoon in the planetary boundary layer. In general, regional (mainly meridional) transport carried more weight than global (mainly zonal) transport in contributing Fukushima-derived radioactivity to the area covered in this review, particularly at the ground-level sites.
Atmospheric aerosols; Dispersion modeling; Free tropospheric aerosols; Long-Range transport; Radioactive aerosol.