250
Ba!in Pittsburgh Fallout
200 +|
°
Pure tropospheric = 300 for Ba'*°/Sr°
:
%
Sr
*°/
Ba'
Pure stratospheric = O for
|
(NSEC Data)
Activity Ratio (Ba'49/ Sr 9°)
150
100
|
=
i
}
sn r
3!
:
| ! |
; ge
[8
¢
;
rr
t
3
§ 6
t
y
$
o§
o
e 2
“yg __* §otc ———*+
[Leo b | att te i _sfamoasoog_2o
APRIL
SEPT, OCT. . NOV. DEC,
JAK,
FER, MAR, “APRIL MAY JUNE SLY,
AUG. SEPT.
1957
1958
Figure 9
'y
r«
lof
ttttinal