988
KRUGER, HOSLER, AND MILLER
so!
!
TT
CT
r
|
—_—
oO
om!
8s
|
8
|
ALTITUDE, 1000 FT
8
|
TROPOPAUSE _
L
i
T
PRECIPITATION RATE,
MM/ HR
1
1
T
—
20
|
~~
Oo
Se
|
T
|
—
906, CONCENTRATION,
DIS/MIN PER LITER
70
—a
—
10 -—
Oe
4
|
1230
1240
|
1250
.
|
1300
|
1310
TIME, EST
|
1320
9g
|
1330
1340
|
_
1350
Fig. 1—Time cross sections for the storm of June 24, 1962,
mixed stratospheric air, and the 88Sr of this debris had decayed to below
detectable levels. The showers sampled in 1962 involved air with Sr
debris of recent origin. The **Sr/"Sr ratios indicated an age consistent
with that of fission products from the late 1961 U.S.S.R. detonations
until the Sept. 10, 1962, showers, which also contained newer debris,
likely from the U. S. Dominic I detonations in the Pacific in the spring
of 1962. The peak Sr concentrations were about 40 times greater than
those in the 1961 showers. The four 1963 storms of April and May oc-