title: Measurement of 210Pb atmospheric flux in the Pacific Northwest.
abstract: Monthly atmospheric flux of 210Pb in Seattle, WA, has been measured over a period of 7 yr. Direct correlation exists between monthly rainfall and the 210Pb deposition; however, for the same amount of rainfall the 210Pb deposition varies from year to year. The mean annual input of 210Pb is 0.44 dpm/cm2 and the standard error of the mean is +/- 0.24 dpm/cm2. A 4.4-fold fluctuation in the 210Pb annual flux was observed during this investigation.
mesh_terms: D007854:Lead / Q000032:analysis*; D011847:Radioactive Fallout / Q000032:analysis*; D011868:Radioisotopes / Q000032:analysis*; D011891:Rain; D012621:Seasons; D014861:Washington
chemical_list: D011847:Radioactive Fallout; D011868:Radioisotopes; D007854:Lead