RELATIVE Sr CONCENTRATIONS IN SURFACE AIR
MONTHLY CONCENTRATIONS OF Sr/ AVERAGE ANNUAL CONCENTRATIONS OF ™Sr
SEPTEMBER AND OCTOBER
eT
oL_p
ot
MARCH AND APRIL
2b
ib
ol
{1
|
_
No _
poy
Lo
2e
Te
0
60°N
|
~UCUdLE LL
|
l
40°N
|
|
20°N
|
|
0
i
20°S
|
|
40°S
—
|
60°S
LATITUDE
Fig. 7—Relative 9Sr concentrations in tropospheric air along the 80th
meridian (1962 and 1963 averages). The shaded areas represent excess
concentrations.
625