Strontium-90 Deposition in New York City

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Science  16 Jun 1967:
Vol. 156, Issue 3781, pp. 1487-1489
DOI: 10.1126/science.156.3781.1487


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.