Evaluation of 7Be and 133Xe atmospheric radioactivity time series measured at four CTBTO radionuclide stations

Stefano Bianchi; Alessandro Longo; Wolfango Plastino; Pavel P Povinec

doi:10.1016/j.apradiso.2017.11.002

Evaluation of ⁷Be and ¹³³Xe atmospheric radioactivity time series measured at four CTBTO radionuclide stations

Appl Radiat Isot. 2018 Feb:132:24-28. doi: 10.1016/j.apradiso.2017.11.002. Epub 2017 Nov 2.

Authors

Stefano Bianchi¹, Alessandro Longo², Wolfango Plastino², Pavel P Povinec³

Affiliations

¹ Department of Mathematics and Physics, Roma Tre University, Via della Vasca Navale, 84, I-00146 Rome, Italy. Electronic address: stefano.bianchi@uniroma3.it.
² Department of Mathematics and Physics, Roma Tre University, Via della Vasca Navale, 84, I-00146 Rome, Italy.
³ Department of Nuclear Physics and Biophysics, Comenius University, Mlynska dolina F1, SK-84248 Bratislava, Slovakia.

PMID: 29145020
DOI: 10.1016/j.apradiso.2017.11.002

Abstract

Time series analysis of ⁷Be and ¹³³Xe atmospheric data and meteorological parameters measured at four CTBTO/IMS radionuclide stations have shown great variability in terms of noise structures, harmonic content, cross-correlation patterns and local Hurst exponent behaviour. This study focused on highlighting and characterising both differences and similarities expected for these radionuclides due to their different physical and chemical characteristics along with their different source terms. Detrended crosscorrelation analysis of different meteorological parameters influencing the residuals time series has shown that for Canadian and American stations the parameters mostly affecting radionuclide concentrations in the air seem to be wind direction and atmospheric pressure.