title: Determination of the mean aerosol residence times in the atmosphere and additional210Po input on the base of simultaneous determination of7Be,22Na,210Pb,210Bi and210Po in urban air.
abstract: The significant differences in the activities of210Pb,210Bi,210Po and cosmogenic7Be and22Na radionuclides in the urban aerosol samples collected in the summers 2010 and 2011 in the Lodz city of Poland were observed. Simultaneous measurement of these radionuclides, after a simple modification of the one compartment model, allows us to calculate both: the corrected aerosol residence times in the troposphere (1 ÷ 25 days) and in the lower stratosphere (103 ÷ 205 days). The relative input of the additional sources (beside of the222Rn decay in the air) to the total activity concentrations of210Pb,210Bi and210Po radionuclides in the urban air, plays a substantial role (up to 97% of the total activity) only in the case of210Po.
authors.affiliation: Institute of Applied Radiation Chemistry, Technical University of Lodz, Zeromskiego Street 116, 90-924 Lodz, Poland.
authors.forename: Magdalena
authors.initials: M
authors.lastname: Długosz-Lisiecka
authors.affiliation: Institute of Applied Radiation Chemistry, Technical University of Lodz, Zeromskiego Street 116, 90-924 Lodz, Poland.
authors.forename: Henryk
authors.initials: H
authors.lastname: Bem
keywords: Aerosols; Radionuclides; Residence time