Table 6. Accumulated freezing and thawing degree-days at Anchorage, Alaska, and calculated sea
ice growth and melt in Cook Inlet. The degree-day data were provided by AFCCC and are for
January 1973 to December 1997, inclusive. (These differ from the values shown in LaBelle et al.
because of their incorrect derivation and/or application of Equation 3.)
Oct
Nov
Dec
Jan
Feb
Mar
Apr
Season
FDD
TDD
FDD
TDD
FDD
TDD
FDD
TDD
FDD
TDD
FDD
TDD
FDD
TDD
1972-73
473
1
279
5
131
35
0
124
1973-74 31
84
291
0
224
11
404
0
255
2
170
53
1
153
1974-75
7
104
157
28
205
3
337
18
301
8
165
11
23
84
1975-76 41
142
268
1
329
7
255
18
292
17
129
19
12
113
1976-77 44
121
46
61
142
6
27
76
23
73
113
17
17
128
1977-78 11
181
243
0
343
2
174
14
103
38
57
51
2
172
1978-79
3
191
86
32
168
19
142
5
301
0
31
71
0
168
1979-80
0
217
34
103
343
3
312
18
84
38
93
42
0
178
1980-81
7
153
67
26
531
3
41
60
127
39
11
94
3
129
1981-82
6
128
176
16
263
8
419
0
254
11
116
37
33
93
1982-83 107
47
178
9
193
27
265
2
159
12
67
42
6
147
1983-84 17
110
112
14
248
2
232
23
191
4
10
129
0
167
1984-85 22
128
193
5
220
11
49
44
281
11
93
21
103
70
1985-86 90
102
289
4
102
52
114
12
164
23
139
24
76
88
1986-87 13
179
126
41
88
47
160
22
94
17
123
50
1
151
1987-88 15
187
78
17
231
7
231
4
141
23
29
44
8
136
1988-89 30
87
179
2
180
18
474
3
224
3
151
21
1
171
1989-90 41
117
242
17
137
23
284
17
428
3
88
37
1
189
1990-91 34
83
346
0
288
1
287
23
196
18
141
19
3
144
1991-92 38
91
119
27
192
1
186
12
256
3
146
47
33
123
1992-93 42
72
103
46
290
14
282
4
174
18
62
28
0
198
1993-94
9
172
132
51
131
17
174
17
233
16
141
52
17
170
1994-95 46
111
257
6
264
5
270
4
174
19
244
23
0
192
1995-96
2
162
173
15
219
7
438
1
247
1
68
38
13
167
1996-97 140
56
205
4
314
1
278
16
33
39
125
2
3
159
1997-98 37
62
78
43
238
6
Mean
33
123
167
23
235
12
252
17
201
18
106
40
14
145
St. Dev. 33
46
83
24
93
13
125
18
92
17
54
27
24
34
Oct
Nov
Dec
Jan
Feb
Mar
Apr
Season
Ig
Im
Ig
Im
Ig
Im
Ig
Im
Ig
Im
Ig
Im
Ig
Im
1972-73
39.4
1.0
5.9
4.7
2.2
32.6
0.0
115.7
1973-74
0.0
78.0
26.8
0.0
21.4
10.3
34.9
0.0
5.4
2.1
3.3
49.1
0.0
142.1
1974-75
0.0
97.1
15.1
26.4
19.7
3.1
30.3
17.1
6.4
7.8
3.2
10.3
0.0
78.5
1975-76
1.1
131.8
25.0
0.5
29.7
6.2
24.0
17.1
6.2
15.5
2.2
17.6
0.0
105.4
1976-77
1.7
112.6
1.9
56.8
13.7
5.2
0.0
70.3
0.0
68.2
1.7
16.0
0.0
118.8
1977-78
0.0
168.4
23.0
0.0
30.7
1.6
16.9
12.9
1.4
35.7
0.0
47.5
0.0
160.2
1978-79
0.0
177.7
7.3
29.5
16.2
17.6
13.6
4.7
6.4
0.0
0.0
66.1
0.0
156.6
1979-80
0.0
201.5
0.1
95.6
30.7
3.1
28.4
17.1
0.8
35.1
1.1
39.3
0.0
165.3
1980-81
0.0
142.6
4.9
23.8
42.9
3.1
1.1
55.8
2.1
36.2
0.0
87.8
0.0
120.4
1981-82
0.0
119.4
17.0
15.0
24.6
7.2
35.9
0.0
5.4
9.8
1.8
34.1
0.0
86.8
1982-83
9.9
43.9
17.2
8.8
18.6
24.8
24.8
1.6
3.0
11.4
0.2
38.8
0.0
136.4
1983-84
0.0
102.3
10.4
12.9
23.4
2.1
22.0
21.7
3.8
3.6
0.0
119.9
0.0
155.5
1984-85
0.0
118.8
18.6
4.7
21.0
10.3
2.4
40.8
6.0
9.8
1.1
19.1
1.4
65.1
1985-86
7.8
94.6
26.7
3.6
9.2
48.6
10.6
10.9
3.1
21.2
2.5
22.2
0.5
81.6
1986-87
0.0
166.4
12.0
38.2
7.6
43.4
15.5
20.7
1.1
16.0
2.0
46.5
0.0
140.5
1987-88
0.0
174.1
6.4
15.5
22.0
6.7
21.9
4.1
2.5
21.2
0.0
40.8
0.0
126.6
1988-89
0.0
80.6
17.3
2.1
17.4
17.1
39.5
2.6
4.7
3.1
2.8
19.6
0.0
158.6
1989-90
1.2
109.0
22.9
16.0
13.1
21.2
26.3
16.0
8.9
2.6
0.9
34.6
0.0
175.7
1990-91
0.2
77.0
30.9
0.0
26.6
1.0
26.5
21.2
4.0
16.5
2.5
18.1
0.0
133.8
1991-92
0.8
84.7
11.2
25.3
18.5
1.0
17.9
11.4
5.4
3.1
2.6
43.9
0.0
114.7
1992-93
1.4
67.2
9.4
42.4
26.8
12.9
26.1
4.1
3.4
17.1
0.1
26.4
0.0
184.5
1993-94
0.0
159.7
12.6
47.0
12.5
16.0
16.9
16.0
4.9
14.5
2.5
48.6
0.0
158.1
1994-95
2.0
103.3
24.1
5.2
24.7
4.7
25.2
3.6
3.4
18.1
5.1
21.2
0.0
178.3
1995-96
0.0
150.4
16.8
14.0
21.0
6.2
37.2
0.5
5.2
0.5
0.3
35.7
0.0
155.0
1996-97
13.4
51.7
19.7
4.1
28.6
0.5
25.8
14.5
0.0
36.2
2.1
2.1
0.0
148.3
1997-98
0.6
57.4
6.3
39.8
22.6
5.2
Mean
1.6
114.8
15.3
21.1
21.7
11.2
22.5
15.4
4.0
16.4
1.6
37.5
0.1
134.5
St. Dev.
3.4
42.6
8.2
22.2
7.6
12.2
11.0
17.0
2.2
15.5
1.3
24.7
0.3
32.0
19
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