title: Strontium-90 deposition in New York City.
abstract: Measurements of strontium-90 deposited in New York City over the past 12 years make for broader understanding of the fallout phenomenon. The data indicate a stratospheric half-residence time of 8 to 10 months. The seasonal oscillation of strontium-90 fallout is very symmetrical and consistent from year to year and completely independent of the timing and magnitude of nuclear tests. The predicted fallout of strontium-90 in 1970 is less than 1 percent of that during the peak year 1963.
mesh_terms: D049673:History, 20th Century; D009519:New York City; D011847:Radioactive Fallout / Q000266:history*; D012987:Soil / Q000032:analysis; D013325:Strontium Isotopes / Q000032:analysis*; D013997:Time Factors
chemical_list: D011847:Radioactive Fallout; D012987:Soil; D013325:Strontium Isotopes