.
cane ee
aa dati cee 6 ak aNlele a etAEadeabl,
.
137
1.6
=
=
2
oe
oO
5
<
a
a
l4-—
—
io
—
SE ON
10
MARCH [8, 1969
—
os =
0.6 -—
MARCH 1/9, 1963
oe
s
Oo
0.4-—
.
0.2 -—
O
_L
1600
100
|
1200
1300
TIME
i400
i500
1600
(CST)
Fic. 98.—Solar radiation data at Argonne National Laboratory, March 18 and 19, 1969
ae
\
— 4500
°°
1200 °°
o
IN\
6
—oOo
Q
1000 [g—-
DATE _!! APRIL 1969
°
°
NI
oT
Ww
oO
NN
5 80075
Fi
-
° 4
°o
=W600
o
™
So
.
®
NN
\
6
—| 3500
AIRPORT
— 3000
"38°
re)
9
0.20
0.30
0.40
o
o
\
GROUND LEVEL-O—
SO. CONCENTRATION, ppm
—l2000 =
NN
o
0.10
+
—{2500 E|-
Ng
°°
0
P
°
o
IN
9
200
}
Oo
0 ota
{O°
>
a
time !020 cst
STATION: HINSDALE
Oo
E
ut
4000
-2
0
8
— 1500
°
N
7
a
9
°
+2
+4
+6
AIR TEMPERATURE, °C
1000.
— 500
°
+8
Fic. 99.—Vertical SO, and temperature profiles, Hinsdale Airport, April 11, 1969, 1020 CST
CST, when north winds at 14 mph were reported and
the temperature of the water in Lake Michigan was
near 0° C. This trajectory, of course, brought fresh,
clear air across the very cold lake over the lake-front
airport into the city. A very thin superadiabatiec layer
is observed at ground level. The air at Meigs a short
distance above the surface was 10°C cooler than the
air inland. This temperature difference is due to both
the change of air mass and cooling by thelake.
Midway reported NNE (10°) winds at 7 mph at
*
*,
rf