Impact of air masses on the distribution of 210Pb in the southeast of Iberian Peninsula air

Publication date: October 2017
Source:Journal of Environmental Radioactivity, Volume 177
Author(s): E. Chham, F. Piñero-García, P. González-Rodelas, M.A. Ferro-García
The current research has been developed in the southern of the Iberian Peninsula in order to better understand the atmospheric processes and also the influence of the air masses origin and pathways in the transport of ²¹⁰Pb-aerosols in the atmosphere. Simultaneous measurements of the radionuclides ⁷Be and ²¹⁰Pb on airborne have been routinely carried out at Granada (Spain 37.177N, 3.598 W, 687 m a.s.l.) from 2010 to 2014. The long term monitoring evolution on ²¹⁰Pb is discussed in this study and also the useful ratio ⁷Be/²¹⁰Pb.The maximum monthly activity concentration for ²¹⁰Pb at ground level in Granada was detected during summer and early autumn (September), whereas minimum activity was measured in the winter. The monthly mean activity concentration for ²¹⁰Pb was 617.8 ± 33.0 μBq·m⁻³. The results show that the annual average ²¹⁰Pb concentrations in samples collected during the same period were almost constant.The lowest activity concentration for ²¹⁰Pb are associated with maritime air masses coming from Atlantic and Norwest of Spain, while the highest activity concentrations for this radiotracers were positively correlated with the arrival of mineral dust linked to continental air masses coming from Mediterranean, Africa and Local area. The concentrations values show a nice agreement with the relevant reported results.



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