Fig. 3

Plumes identified by Tsuruta et al. (2014). Horizontal bars show the period with high ¹³⁷Cs concentrations (>10 Bq m⁻³). Closed and open circles indicate areas in the Hamadori, Nakadori, and Kantou regions where the concentrations were larger or smaller, respectively, than 100 Bq m⁻²