t
.
ao
oe
vw
*
te
wa
<—
yy
vot
Pep
ABLE Ta.
DEPOSITION FROM TROPOSPHERIC FLLLOUT
FROM SURFACE AIR FILTER D.TA
DATE
Fission Product
Strontium-90
Data*
Data
1957
July
August
-O7 MT
.08
~11
1h
-O7
013
10
23
September
13
November
December
»05
205
October
.O9 MT
.06
--
C7
O09
1958
January
February
March
April
May
June
July
.07
18
232
-16
.16
August
-13 Southern Hemisphere
-l2 Northern Hemisphere
-LO Northern Hemisphere
September
.OA Northern Hemisphere
.08 Southern Hemisphere
.O4 Southern Hemisphere
15
---
-~
---
--
--
--
Filter Efficiency 100% (assumed)
Lower 10,000 feet 50% atmospheric residence time 3 days
Troposphere (80% atmospheric) 30 day residence time
* (20 KT = 25 dpm/CuM at equator)
.t
ee