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SEPTEMBER AND OCTOBER
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|
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NOVEMBER AND DECEMBER
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JANUARY AND FEBRUARY
Z2/
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re
7
0}
a
|
l
JULY AND AUGUST
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O0
2
|
4
}
>
=
MAY AND JUNE
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e
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SEPTEMBER AND OCTOBER
~~
—
pot
£77
ZolLit1
ps
5
Zz
:
© |
tr
2 0
_
Z 3
g
a 2r
o
60°N
1
NOVEMBER AND DECEMBER
po
MAY AND JUNE
JANUARY AND FEBRUARY
--———__a
——-
tt
el
JULY AND AUGUST
l
40°N
7
—
|
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4
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Ss 3
|
MARCH AND APRIL
Ww
Hq
Lt
20°N
ee
MARCH AND APRIL
0
LATITUDE
Lo
20°S
|
—
l
40°S
4
|
60°S
Fig. 8—Relative "Sr concentrations in tropospheric air along the 80th
meridian (1962 and 1963 averages). The shaded areas represent excess
concentrations.