Fallout and concentration of aerosol-borne radioactivity over the Atlantic (Appendix)

Fallout was collected in a vessel of large area. Emphasis was on separation of "wet" and "dry" samples.

For strontium 90 a ratio of "wet" to "dry" fallout of 5:1 has been found independent of latitude. The total fallout was smaller than comparable values from continents because of very small amounts of rainfall in the equatorial zone. In order to achieve consistency in the global balance a better knowledge not only of radioactivity but also of precipitation over the ocean is required.