ABSTRACT
A world-wide network of gummed film stations was established
to monitor fallout following Operation Castle.
Although meteorologi-
cal data were poor, a general connection of tropospheric flow
patterns with observed fallout.wes evident. There was a tendency for
debris to remain in tropical latitudes, with incursions into the
temperate regions associated with meteorological disturbances of the
predominantly zonal flow. As the season advanced, such incursions
became more evident.
Outside of the tropics, the southwestern Uni ted
States received the greatest total fallout, about five times that
received in Japan.
The total world-wide fallout up to July 1, 195k,
from the Castle series qutside of the immediate test area, is
estimated to be about
of the total fission activity produced.
The maximum fallout on any day at an individual station,in the
United States, corrected to samoling day, was 200,000 d/m/ft2,
a
ret
It is concludedthat the probability of early fallout in
inhabited regions would be reduced by holding Pacific test series
in the winter months.
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