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ABSTRACT
‘The purpose of this report is to present ‘analysis of the
meteorological aspects of Operation IVY, to document the radiological data, and to interpret the analysis and data for guidance
J
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in future Pacific tests.
Fallout data was collected by the Atomic Energy Commscion
on a world-wide network of gummed paper stations, supplemented
_ by a few air filters, the radiological analysis being carried out
by the New York Operations Office of the AtomicEnergy Commission. ©
'. Documentation of this data is in the form of maps showing the
daily collections of beta activity at every sampling station used
during this. operation.
Meteorological analysis of the world-wide dispersion of
debris from the MIXE and KING tests is best presented by dividing
each cloud ‘into three separate layers - the trade wind layer
(surface to about 30,000 feet), the upper troposphere layer
(30,000 feet to 355000 feet) and the stratosphere layer (55,000
feet to cloud top).
Schematic diagrams showing daily outlines of
these layers as well as maps of daily radioactive surface deposi-
tion are presented and discussed.
The trade wind layer of both
clouds moved away from the test site toward the west, a southern
portion continuing westward while a segment from the’ northern edge
dbase i its
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split off to curve toward the north-and then eastward toward North
America. Direction of transport of the upper troposphere and
stratosphere layers of the debris was variable although movement
' . was essentially zonal (east and west)..
The effects of transport and diffusion are discussed and it
is concluded that no data positively requires fallout of particles
fron debristhat initially|stabilized in the> stratosphere.
- Average activity ‘of surface depositionis increased. by precipi_ tation, but the increase in the United States for this operation is
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