Validation of sea ice concentration - American sector
Bulletin date: 2025-01-16
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-01-10:
| Best estimate |
Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
7 |
815 |
36 |
72 |
39 |
0 |
0 |
0 |
| OW |
4 |
163 |
44 |
135 |
88 |
92 |
5 |
0 |
| VODI |
2 |
51 |
26 |
140 |
220 |
303 |
81 |
0 |
| ODI |
0 |
0 |
4 |
60 |
225 |
167 |
124 |
0 |
| CDI |
0 |
4 |
10 |
32 |
163 |
242 |
348 |
1 |
| VCDI |
0 |
0 |
0 |
7 |
56 |
841 |
12889 |
28370 |
|
...date precedes bulletin
|
Date: 2025-01-12:
| Best estimate |
Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
651 |
32 |
34 |
8 |
0 |
0 |
0 |
| OW |
0 |
133 |
40 |
85 |
101 |
29 |
6 |
0 |
| VODI |
0 |
64 |
24 |
106 |
176 |
101 |
130 |
0 |
| ODI |
0 |
1 |
8 |
71 |
250 |
83 |
329 |
0 |
| CDI |
0 |
2 |
2 |
84 |
254 |
143 |
360 |
51 |
| VCDI |
0 |
2 |
7 |
28 |
135 |
787 |
14327 |
27222 |
|
...date precedes bulletin
|
Date: 2025-01-14:
| Best estimate |
Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
510 |
28 |
13 |
0 |
0 |
0 |
0 |
| OW |
0 |
124 |
66 |
131 |
20 |
1 |
0 |
0 |
| VODI |
0 |
25 |
17 |
92 |
147 |
28 |
11 |
0 |
| ODI |
0 |
2 |
1 |
38 |
149 |
111 |
43 |
0 |
| CDI |
0 |
0 |
3 |
13 |
343 |
500 |
302 |
0 |
| VCDI |
0 |
14 |
13 |
44 |
133 |
1080 |
16973 |
24891 |
|
...date precedes bulletin
|
Date: 2025-01-16:
| Best estimate |
Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
250 |
2 |
4 |
0 |
0 |
0 |
0 |
| OW |
0 |
201 |
32 |
41 |
8 |
0 |
0 |
0 |
| VODI |
0 |
45 |
43 |
138 |
110 |
16 |
0 |
0 |
| ODI |
0 |
0 |
0 |
43 |
128 |
88 |
10 |
0 |
| CDI |
0 |
0 |
0 |
10 |
154 |
403 |
222 |
0 |
| VCDI |
0 |
0 |
0 |
8 |
191 |
1213 |
14176 |
28330 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
307 |
12 |
6 |
0 |
0 |
0 |
0 |
| OW |
0 |
164 |
26 |
54 |
26 |
0 |
0 |
0 |
| VODI |
0 |
25 |
39 |
141 |
100 |
21 |
0 |
0 |
| ODI |
0 |
0 |
0 |
29 |
148 |
125 |
22 |
0 |
| CDI |
0 |
0 |
0 |
8 |
171 |
424 |
385 |
1 |
| VCDI |
0 |
0 |
0 |
6 |
146 |
1150 |
14001 |
28329 |
|
Date: 2025-01-18:
| Best estimate |
Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
105 |
1 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
135 |
41 |
51 |
2 |
0 |
0 |
0 |
| VODI |
0 |
93 |
26 |
150 |
84 |
10 |
8 |
0 |
| ODI |
0 |
12 |
16 |
76 |
156 |
64 |
10 |
0 |
| CDI |
0 |
1 |
4 |
14 |
147 |
283 |
99 |
0 |
| VCDI |
0 |
0 |
0 |
31 |
220 |
1880 |
13928 |
28219 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
170 |
8 |
1 |
0 |
0 |
0 |
0 |
| OW |
0 |
105 |
40 |
70 |
9 |
0 |
0 |
0 |
| VODI |
0 |
69 |
32 |
139 |
96 |
14 |
10 |
0 |
| ODI |
0 |
2 |
6 |
73 |
170 |
102 |
29 |
0 |
| CDI |
0 |
0 |
2 |
14 |
131 |
369 |
203 |
0 |
| VCDI |
0 |
0 |
0 |
25 |
203 |
1752 |
13803 |
28219 |
|
Date: 2025-01-20:
| Best estimate |
Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
14 |
1 |
3 |
4 |
0 |
0 |
0 |
| OW |
0 |
107 |
13 |
7 |
1 |
0 |
0 |
0 |
| VODI |
0 |
145 |
74 |
139 |
30 |
1 |
0 |
0 |
| ODI |
0 |
12 |
16 |
117 |
187 |
30 |
3 |
0 |
| CDI |
0 |
0 |
0 |
9 |
187 |
370 |
115 |
0 |
| VCDI |
0 |
3 |
3 |
38 |
293 |
2970 |
17008 |
23966 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
58 |
12 |
12 |
4 |
0 |
0 |
0 |
| OW |
0 |
85 |
18 |
15 |
9 |
0 |
0 |
0 |
| VODI |
0 |
109 |
42 |
83 |
41 |
11 |
9 |
0 |
| ODI |
0 |
25 |
29 |
118 |
143 |
86 |
25 |
0 |
| CDI |
0 |
1 |
4 |
44 |
149 |
283 |
285 |
0 |
| VCDI |
0 |
3 |
2 |
41 |
356 |
2991 |
16807 |
23966 |
|
Date: 2025-01-22:
| Best estimate |
Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
0 |
0 |
0 |
7 |
3 |
0 |
0 |
| ODI |
0 |
3 |
8 |
18 |
91 |
32 |
1 |
0 |
| CDI |
0 |
4 |
12 |
45 |
233 |
264 |
113 |
2 |
| VCDI |
0 |
0 |
1 |
31 |
286 |
2410 |
18628 |
23674 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
0 |
0 |
0 |
6 |
2 |
0 |
0 |
| VODI |
0 |
0 |
0 |
6 |
10 |
16 |
0 |
0 |
| ODI |
0 |
7 |
14 |
25 |
38 |
78 |
20 |
0 |
| CDI |
0 |
0 |
7 |
44 |
230 |
216 |
171 |
26 |
| VCDI |
0 |
0 |
0 |
19 |
333 |
2397 |
18551 |
23650 |
|
Date: 2025-01-24:
| Best estimate |
Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
| ODI |
0 |
0 |
0 |
2 |
25 |
31 |
2 |
0 |
| CDI |
0 |
0 |
0 |
3 |
128 |
226 |
130 |
1 |
| VCDI |
0 |
0 |
0 |
21 |
322 |
2406 |
15701 |
26867 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
0 |
11 |
11 |
11 |
0 |
| CDI |
0 |
0 |
0 |
3 |
57 |
146 |
85 |
1 |
| VCDI |
0 |
0 |
0 |
23 |
407 |
2507 |
15737 |
26867 |
|
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