Appearance of a Spring Maximum in Nuclear Test Debris in 1960

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Science  17 Feb 1961:
Vol. 133, Issue 3451, pp. 460-461
DOI: 10.1126/science.133.3451.460


The existence of a spring maximum in fallout deposition due to the disruption of the tropopause in middle latitudes has been debated for the past several years. Evidence obtained from air filters indicates elevated levels of radioactivity from nuclear tests in surface air during April through July 1960.