Validation of sea ice concentration - European sector
Bulletin date: 2025-11-27
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-11-21:
| 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 |
80461 |
5871 |
43 |
43 |
7 |
0 |
0 |
0 |
| OW |
1105 |
440 |
92 |
93 |
40 |
0 |
0 |
0 |
| VODI |
3296 |
148 |
65 |
182 |
119 |
8 |
0 |
0 |
| ODI |
0 |
34 |
44 |
107 |
181 |
87 |
0 |
0 |
| CDI |
0 |
1 |
6 |
67 |
327 |
437 |
89 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
53 |
1729 |
7630 |
57 |
|
...date precedes bulletin
|
Date: 2025-11-23:
| 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 |
80048 |
6175 |
54 |
51 |
6 |
0 |
0 |
0 |
| OW |
1108 |
456 |
71 |
92 |
56 |
2 |
0 |
0 |
| VODI |
3307 |
201 |
66 |
155 |
105 |
19 |
0 |
0 |
| ODI |
0 |
57 |
39 |
90 |
120 |
113 |
10 |
0 |
| CDI |
0 |
7 |
15 |
85 |
189 |
503 |
85 |
0 |
| VCDI |
0 |
0 |
0 |
9 |
43 |
1243 |
8080 |
202 |
|
...date precedes bulletin
|
Date: 2025-11-25:
| 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 |
79481 |
6708 |
56 |
37 |
0 |
0 |
0 |
0 |
| OW |
1038 |
544 |
126 |
155 |
30 |
4 |
0 |
0 |
| VODI |
3316 |
118 |
70 |
206 |
83 |
10 |
0 |
0 |
| ODI |
0 |
28 |
24 |
110 |
141 |
18 |
0 |
0 |
| CDI |
0 |
17 |
26 |
82 |
231 |
467 |
40 |
0 |
| VCDI |
0 |
0 |
0 |
7 |
53 |
2163 |
7058 |
415 |
|
...date precedes bulletin
|
Date: 2025-11-27:
| 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 |
78962 |
7047 |
51 |
34 |
9 |
0 |
0 |
0 |
| OW |
1027 |
536 |
135 |
128 |
60 |
27 |
0 |
0 |
| VODI |
3330 |
189 |
87 |
163 |
143 |
34 |
0 |
0 |
| ODI |
0 |
54 |
28 |
111 |
114 |
43 |
0 |
0 |
| CDI |
0 |
27 |
39 |
87 |
233 |
479 |
18 |
0 |
| VCDI |
0 |
0 |
5 |
46 |
77 |
2058 |
7290 |
191 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
78964 |
6986 |
48 |
29 |
2 |
0 |
0 |
0 |
| OW |
1025 |
592 |
130 |
119 |
58 |
26 |
0 |
0 |
| VODI |
3330 |
190 |
87 |
168 |
132 |
35 |
0 |
0 |
| ODI |
0 |
51 |
38 |
120 |
126 |
36 |
0 |
0 |
| CDI |
0 |
34 |
36 |
85 |
237 |
473 |
21 |
0 |
| VCDI |
0 |
0 |
6 |
48 |
81 |
2071 |
7287 |
191 |
|
Date: 2025-11-29:
| 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 |
78416 |
6844 |
185 |
147 |
36 |
0 |
0 |
0 |
| OW |
1081 |
558 |
117 |
175 |
118 |
21 |
0 |
0 |
| VODI |
3343 |
283 |
91 |
159 |
210 |
57 |
0 |
0 |
| ODI |
0 |
90 |
49 |
145 |
122 |
48 |
0 |
0 |
| CDI |
0 |
68 |
75 |
100 |
287 |
423 |
13 |
0 |
| VCDI |
0 |
7 |
27 |
95 |
211 |
2398 |
6861 |
2 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
78416 |
6775 |
190 |
156 |
30 |
0 |
0 |
0 |
| OW |
1074 |
622 |
108 |
153 |
104 |
19 |
0 |
0 |
| VODI |
3350 |
276 |
97 |
172 |
211 |
53 |
0 |
0 |
| ODI |
0 |
85 |
44 |
140 |
135 |
60 |
0 |
0 |
| CDI |
0 |
82 |
79 |
100 |
298 |
418 |
12 |
0 |
| VCDI |
0 |
10 |
26 |
100 |
206 |
2397 |
6862 |
2 |
|
Date: 2025-12-01:
| 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 |
78086 |
7115 |
110 |
94 |
8 |
0 |
0 |
0 |
| OW |
1039 |
831 |
157 |
130 |
61 |
6 |
0 |
0 |
| VODI |
3346 |
311 |
67 |
264 |
163 |
33 |
0 |
0 |
| ODI |
0 |
77 |
23 |
98 |
272 |
63 |
0 |
0 |
| CDI |
0 |
59 |
31 |
95 |
264 |
765 |
67 |
0 |
| VCDI |
0 |
18 |
12 |
43 |
81 |
2319 |
6751 |
3 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
78010 |
6755 |
112 |
100 |
35 |
0 |
0 |
0 |
| OW |
1108 |
843 |
94 |
147 |
88 |
37 |
0 |
0 |
| VODI |
3353 |
378 |
78 |
157 |
221 |
74 |
0 |
0 |
| ODI |
0 |
207 |
53 |
110 |
149 |
92 |
0 |
0 |
| CDI |
0 |
117 |
17 |
100 |
257 |
682 |
80 |
0 |
| VCDI |
0 |
111 |
46 |
110 |
99 |
2301 |
6738 |
3 |
|
Date: 2025-12-03:
| 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 |
77752 |
7317 |
114 |
68 |
4 |
0 |
0 |
0 |
| OW |
1004 |
890 |
133 |
193 |
70 |
12 |
0 |
0 |
| VODI |
3363 |
224 |
141 |
231 |
170 |
79 |
2 |
0 |
| ODI |
0 |
43 |
47 |
198 |
134 |
47 |
0 |
0 |
| CDI |
0 |
5 |
35 |
153 |
238 |
561 |
186 |
0 |
| VCDI |
0 |
0 |
3 |
103 |
165 |
1736 |
7432 |
9 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
77753 |
6864 |
101 |
78 |
15 |
0 |
0 |
0 |
| OW |
999 |
982 |
126 |
176 |
113 |
53 |
2 |
0 |
| VODI |
3367 |
442 |
97 |
140 |
118 |
47 |
0 |
0 |
| ODI |
0 |
102 |
86 |
213 |
132 |
67 |
1 |
0 |
| CDI |
0 |
63 |
33 |
210 |
215 |
478 |
215 |
0 |
| VCDI |
0 |
26 |
30 |
129 |
188 |
1790 |
7402 |
9 |
|
Date: 2025-12-05:
| 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 |
76455 |
8254 |
98 |
88 |
21 |
0 |
0 |
0 |
| OW |
985 |
743 |
174 |
282 |
94 |
41 |
0 |
0 |
| VODI |
2903 |
145 |
142 |
307 |
162 |
92 |
4 |
0 |
| ODI |
479 |
13 |
34 |
208 |
236 |
44 |
1 |
0 |
| CDI |
0 |
5 |
7 |
133 |
380 |
447 |
305 |
0 |
| VCDI |
0 |
0 |
1 |
22 |
127 |
1144 |
7733 |
553 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
76450 |
7816 |
96 |
128 |
39 |
0 |
0 |
0 |
| OW |
982 |
841 |
127 |
228 |
124 |
83 |
4 |
0 |
| VODI |
2861 |
379 |
138 |
248 |
160 |
67 |
0 |
0 |
| ODI |
529 |
79 |
58 |
187 |
211 |
53 |
2 |
0 |
| CDI |
0 |
33 |
24 |
176 |
340 |
391 |
211 |
0 |
| VCDI |
0 |
12 |
13 |
73 |
146 |
1174 |
7826 |
553 |
|
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