60
60
40
50
20
1990-91
40
A6
0
B25
A1 Sensor
A28
1990-91
B4
1992-93
30
20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
a. 199091.
a. A1 sensor.
60
60
A30 Sensor
1990-91
1992-93
50
40
40
20
1991-92
A6
30
0
B25
A28
B4
20
20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
b. A30 sensor.
b. 199192.
60
60
B26 Sensor
1990-91
1992-93
40
50
20
1992-93
40
A6
0
B25
A28
B4
30
20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
10 20
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
c. 199293.
c. B26 sensor.
Figure 19. Temperatures 199091 vs. 199293.
Figure 20. Temperatures taken 2 ft below grade.
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