Seasonal variation of atmospheric concentrations of 210Pb and 7Be at Tsukuba, Japan, with a possible observation of 210Pb originating from the 1991 eruption of Pinatubo volcano, Philippines.

Po-210 and Pb-210 as atmospheric tracers and global atmospheric Pb-210 fallout: a Review

“…Monthly 210 Pb concentrations measured over a period of 12 years in Belgrade (Central Serbia) varied between 0.30 and 3.17 mBq m À3 . In Southeastern Spain the 210 Pb concentration varied between 0.28 and 0.92 mBq m À3 , with a geometric mean of 0.52 mBq m À3 and a large number of average values fall within a range of 0.2 to 1.2 mBq m À3 (0.58 mBq m À3 in New Haven, Connecticut, Turekian et al, 1983; 0.45 mBq m À3 om Tsukuba, Japan, Sato et al, 1994;0.74 mBq m À3 in Palermo, Italy, Cannizaro et al, 1999;0.57 mBq m À3 in South Germany, Winkler and Rosner, 2000;0.62 mBq m À3 in Grenade, Spain, Azahra et al, 2004b;1.15 mBq m À3 in Detroit, USA, McNeary and Baskaran, 2003). In Lisbon, Portugal the 210 Pb concentration varied between 0.036 and 0.524 mBq m À3 , with the lowest values corresponding to oceanic air masses (Carvalho, 1995).…”

Highly Time-Resolved Measurements of Airborne Radionuclides by Extremely Low Background ^|^gamma;-ray Spectrometry

“…A number of investigations have been made for explaining regional atmospheric processes with the use of atmospheric concentrations and/or deposition fluxes of 210 Pb (half-life: 22.3 y), which is a long-lived decay product of 222 Rn emanating from ground surface, and 7 Be (53.3 d) produced by the nuclear spallation reaction between secondary cosmic rays and nuclei in the upper atmosphere. [1][2][3][4][5][6] On the other hand, clarifications of advection and diffusion processes and removal processes of aerosol particles attaching the nuclides from the atmosphere have been attempted from variability analyses of short-lived 214 Pb and 212 Pb which are decay products of airborne 222 Rn and 220 Rn, respectively. [7][8][9][10][11] The behavior of aerosols depends largely on meteorological factors of ambient air, conditions of which change sensitively with atmospheric phenomena such as Kosa events and others.…”

Atmospheric deposition of35S

“…The spring peak of 7Be in aerosol and atmospheric deposition were reported previously. 4,5 In this study, however, such a peak is not clear on 35S, 32p and 7Be in deposition. The deposition rates of 35S look like lower in summer, possibly owing to the oceanic air mass from the Pacific Ocean.…”