Atmospheric deposition patterns of Pb-210 and Be-7 in Cienfuegos, Cuba

作者：Alonso Hernandez Carlos M^*; Morera Gomez Yasser; Cartas Aguila Hector; Guillen Arruebarrena Aniel

来源：Journal of Environmental Radioactivity, 2014, 138: 149-155.

DOI：10.1016/j.jenvrad.2014.08.023

• Be-7
• (PB)-P-210
• Atmospheric deposition
• Cienfuegos
• Cuba

The radiometric composition of bulk deposition samples, collected monthly for one year, February 2010 until January 2011, at a site located in Cienfuegos (22 degrees 03' N, 80 degrees 29' W) (Cuba), are analysed in this paper. Measurement of Be-7 and Pb-210 activity concentrations were carried out in 12 bulk deposition samples. The atmospheric deposition fluxes of Be-7 and Pb-210 are in the range of 13.2-132 and 1.24-8.29 Bq m(-2), and their mean values are: 56.6 and 3.97 Bq m(-2), respectively. The time variations of the different radionuclide have been discussed in relation with meteorological factors and the mean values have been compared to those published in recent literature from other sites located at different latitudes. The annual average flux of Pb-210 and Be-7 were 47 and 700 Bq m(-2) y(-1), respectively. Observed seasonal variations of deposition data are explained in terms of different environmental features. The atmospheric deposition fluxes of 7Be and 210Pb were moderately well correlated with precipitation and well correlated with one another. The Pb-210/Be-7 ratios in the monthly depositions samples varied in the range of 0.05 0.10 and showed a strong correlation with the number of rainy days.

• 出版日期2014-12