Analysis of Factors Contributing to the Increase in 7Be Activity Concentrations in the Atmosphere
Journal: International Journal of Environmental Research and Public Health
Year: 2022

In March 2013, increased <sup>7</sup>Be activity concentrations in the atmosphere were observed for successive days in Dazaifu, western Japan. The daily <sup>7</sup>Be activity concentration ranged from 0.93 to 14 mBq/m<sup>3</sup>, with a monthly average of 8.3 mBq/m<sup>3</sup>. This average was the highest among the monthly averages observed between 1999 and 2015, and higher than the monthly average over this period (4.7 mBq/m<sup>3</sup>) plus twice the standard deviation. Also, this exceede