Figure 2 (Figura 2)
Average Hemispheric Concentrations of Gross Gamma Activity
in Surface Air
“(Promedio de Concentraciones de Actividad en los Hemisferios)
Northern
Hemisphere
Southern Hemisphere ----~
10
+
a
ao
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1
f
it
1
i
3
é.
10
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SY
=
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\
10
2
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f
5
1
=
ose
.
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/
WN,
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<=
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10
1
—
io
_———_
LATE TILER EEE
13
5
79FU
1963
——
——
—
LPAI ATT A ELI IED I
1357
.
1964
FUN
t3
SS
FRUII1
1965
3BS5
79
1966
——
—w
IE I I I It
WIS
FS
Fs<su+s
1967
3B5
ET
FRV—NI'
1968
el
3S
e
eat
579N
1969
=
LILVIE EIT ED
3°95
7 91
1970
1