Abstract
Atmospheric concentrations of 7Be and 210Pb obtained by a high-volume air sampler with a cascade impactor were measured from September 2016 to November 2017 in Astana, Kazakhstan. The levels and seasonal variations of atmospheric 7Be and 210Pb concentrations were investigated together with their activity size distributions. Typical seasonal variability was observed with higher concentrations of 7Be occurring in the warm summer and that of 210Pb towards the cold winter. These trends may be attributed to the increased vertical mixing within the troposphere during the warm summer season and the frequent inversion conditions of the surface layers during the cold winter season.
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Acknowledgements
We are grateful to Dr. K. Sakata for his useful advices on the samplings. We thank for Ms. M. Shimote for transferring the all filter samples to each laboratory, and we also thank for Ms. M. Nasu for the preparations of sampling filters. This research was supported by a Grant-in Aid for Scientific Research from the Ministry of Education, Science, Sports and Culture, Japan (Numbers: 26257501 and 19H01149).
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Sambayev, Y.K., Zhumalina, A.G., Zhumadilov, K.S. et al. Temporal variation of atmospheric 7Be and 210Pb concentrations and their activity size distributions at Astana, Kazakhstan in Central Asia. J Radioanal Nucl Chem 323, 663–674 (2020). https://doi.org/10.1007/s10967-019-06968-x
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DOI: https://doi.org/10.1007/s10967-019-06968-x