METEOROLOGICAL INFLUENCES UPON 2°Sr FALLOUT
CONCENTRATION IN PRECIPITATION:
PART 2. CONVECTIVE ACTIVITY AND
EXTRATROPICAL CYCLONES”
PAUL KRUGER,{ CHARLES L. HOSLER,t+t and ALBERT MILLER$§
Hazeiton-Nuclear Science Corporation, Palo Alto, California
ABSTRACT
The meteorological effects upon Sr fallout deposition from convective
activity and from extratropical cyclones were examined in several locations. Data from 14 convective shower storms in Pennsylvania showed
that the changes in “Sr concentration inthe precipitation were in accord
with the life cycle of convective cells; the time of peak concentration
coincided with the time of maximum radar-echo cloud-top heights. For
the large-scale uplift associated with extratropical cyclones, the
slower changing Sr concentrations were associated with evaporation
effects upon the rainfall, the precipitation-growth mechanism, the
passage of fronts and trough lines, and the stratification of nuclear
debris in the atmosphere.
INTRODUCTION
Our presentation at the previous AEC fallout conference covered
the first part of our program, the role of large-scale uplift! on "Sr
*Part 1, Large-scale Uplift, was presented at the previous AEC fallout con-
ference.!
+Also at Stanford University, Stanford, Calif.
tAlso at Pennsylvania State University, University Park, Pa.
§Also at San Jose State College, San Jose, Calif,
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