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COMeteorologists of Joint Task Force SEVEN have analyzed weather
conditions following each of the explosions, and conclude:
"Aside
from local increases in middle and high altitude cloudiness and possibly a
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few induced showers in the immediate area, thera is no evidence that
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the Pacific testa produced any noticeable effect on the weather at
or near the Pacific Proving Ground. There is no basia for believing
that these slight local disturbances in weather which aristed at the
PPG during the test propagated outside the immediate area,"
As e@ result of observations of the dust from the Fraketoa
volcanic explosion, which took place in the tropics in 1883, and
from observations of the upper air flow pattern, it is expected
that the heaviest concentrations of the dust will circumnavigate
the globe in the tropice with minor northward and southward excursions
of the cloud and slow mixing toward the temperate latitudes of both
hemispheres.
Inspection of rainfall records in the tropice indicates
no unusual amounts, although the year-to-year variability is small and
abnormalities would readily stand out.
There is no evidence of
widespread heavy tropical rainfall depleting the supplies of mofsture
for drought-stricken areas of the United States or elsewhere.
Turning next to the United Jtates, a study of deposited radio-
United States agna whole has had much less radioactive dust settle
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active dust collected during the Spring of 1954 indicates that the
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REPRODUCED AT THE DWIGHTD.
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the recent Pacific test series on the weather.