Soil depth (cm) Freezing (month/day) Completely frozen (month/day) Thawing (month/day) Completely thawed (month/day)
0-20 11/10 12/31 3/16 4/25
20-40 11/19 12/31 4/7 4/25
40-60 11/24 12/31 4/15 4/27
60-80 12/8 2/5 4/17 4/30
80-100 12/13 2/18 4/22 5/23
100-120 12/21 2/20 4/20 5/26
120-140 12/28 2/23 4/25 5/28
140-160 1/3 2/23 4/29 5/27
160-180 1/10 2/24 4/27 5/28
180-200 1/11 2/27 4/30 5/30