(in.)
Time
(h)
(m)
320
400 440 0
320
400
0
40
80
120
160
200
240
280
360
40
80
120
160
200
240
280
360
440
0
a
b
2
F
0 ros
C
tL
?
Is
ot ine
0.1
4
he
rm
?
?
6
?
0.2
8
10
Ta ≤ 0C
Ta ≤ 0C
0.3
12
14
0
0
c
d
2
0.1
4
6
0.2
8
?
10
?
?
Ta ≤ 0C
Ta ≤ 0C
0.3
12
14
a--RG C, FTC1; b--RG D, FTC1; c--RG C, FTC2; d--RG D, FTC2.
Figure 20. Frost penetration and thaw in soil bin.
FTC1
FTC2
FTC1
FTC2
0.4
0.3
0.2
0.1
#6
#3
1.53.5 cm
1.53.5 cm
0
0.4
0.3
0.2
0.1
#5
#2
2022 cm
1820 cm
0
0.4
0.3
0.2
0.1
#4
#1
3739 cm
35.538 cm
0
145
150
155
160
165
170
175
180
145
150
155
160
165
170
175
Julian Days
Figure 21. Volumetric soil water (%) measured by the Hydra probes at 0600 each day.
22
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