600
ee
1
709
T
T
r
]
T
T
!
l
T
STRONTIUM- 90 CONCENTRATIONS
65,000 Ft.
60,000 Ft.
O
°
400r-
e
gr°° (dpm 1000 SCF)
e
Oo
e
300F-
O
a
A
a
A
100k
4
A
a
e
;
°°
4
e
0
200+ ©
e
Ls
A
e
e
.
@
e
4
A
e
°
oO
O
O
Oo
0
O
Oo
Oo
O
S
0
oO
ORF
|
]
L
N-0 | JF M-A M-v
1957
LL.
4
4
I
L
L
J-A S-O N-D]uU-F M-A M-JU
1958
ij
J-A
1959
\
S-0
L
|
}
Fig. 5 -- Strontium-90 concentrations (in dpm/1000 scf) at 60, 000,
65,000, and 70, 000 feet versus time for latitude band
t9
30°N~-30°S
|
NO | oF M-A M-d
1960