Wet depositional fluxes of 7 Be and 210 Pb and their influencing factors at two characteristic cities of China.

The atmospheric depositional fluxes of 7 Be and 210 Pb in Yueyang and Hengyang were measured by the γ spectrum analysis method and their influencing factors were discussed. Results are summarized as follows: the variation ranges and average values of 7 Be depositional fluxes are very close to each other in the two characteristic sampling regions, but not for 210 Pb. In the same sampling region, there is a strong positive linear correlation between the depositional fluxes of two nuclides and their monthly variations are synchronous. Correlation coefficients between atmospheric depositional fluxes and different factors suggest that rainfall is the most important influencing factor, but in Hengyang sampling region, the source has great effect on the depositional fluxes of 210 Pb.