7Be concentration in the near-surface layer of the air in Bialystok (north-eastern Poland) in the years 1992–2010

Publication date: July 2018
Source:Journal of Environmental Radioactivity, Volume 187
Author(s): Jacek Kapała, Maria Karpińska, Stanisław Mnich, Anna Gromotowicz-Popławska, Grzegorz Kulesza
Weekly measurements of air ⁷Be concentrations (n = 769) were performed in the years 1992–2010 in Bialystok (north-eastern Poland) using gamma spectrometry. The arithmetic mean (AM) concentration of ⁷Be was 2.51 mBq m⁻³, and the median (M) was 2.24 mBq m⁻³ (range 0.47–7.81 mBq m⁻³). The observed ⁷Be concentrations were within the range of levels recorded in Europe. Typical seasonal variability was observed. Concentrations of ⁷Be in the warm season (May, June, July) were almost twice as high as those in the cold season (November, December, January).A correlation was found between weekly ⁷Be concentrations and mean weekly values of relative humidity, temperature, and wind speed throughout the observation period. Pearson's correlation coefficients were −0.63, p < 0.001; 0.477, p < 0.001; −0.288, p < 0.001, respectively.The correlation coefficient between sunspot number and mean annual ⁷Be concentrations in the air in the years 1992–2010 was −0.609.



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