Validation of sea ice concentration - Full domain
Bulletin date: 2025-05-08
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-05-02:
| 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 |
66609 |
15813 |
248 |
227 |
12 |
0 |
0 |
0 |
| OW |
10 |
1973 |
605 |
1245 |
209 |
1 |
0 |
24 |
| VODI |
2 |
145 |
247 |
2815 |
1556 |
91 |
23 |
60 |
| ODI |
1 |
10 |
6 |
550 |
2841 |
927 |
138 |
51 |
| CDI |
0 |
6 |
0 |
132 |
1804 |
5638 |
2378 |
153 |
| VCDI |
0 |
0 |
0 |
50 |
1014 |
6295 |
31961 |
48873 |
|
...date precedes bulletin
|
Date: 2025-05-04:
| 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 |
66924 |
15237 |
205 |
210 |
14 |
1 |
0 |
0 |
| OW |
40 |
2348 |
540 |
1388 |
224 |
13 |
0 |
4 |
| VODI |
5 |
377 |
355 |
2454 |
1685 |
176 |
17 |
80 |
| ODI |
1 |
7 |
34 |
686 |
2775 |
1136 |
117 |
65 |
| CDI |
0 |
0 |
5 |
177 |
2271 |
6510 |
2451 |
224 |
| VCDI |
0 |
0 |
0 |
33 |
744 |
6996 |
28295 |
49919 |
|
...date precedes bulletin
|
Date: 2025-05-06:
| 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 |
66971 |
16107 |
198 |
212 |
6 |
0 |
0 |
0 |
| OW |
48 |
2308 |
725 |
1019 |
143 |
1 |
0 |
1 |
| VODI |
3 |
116 |
229 |
3198 |
1266 |
52 |
6 |
20 |
| ODI |
0 |
1 |
7 |
524 |
3777 |
502 |
41 |
48 |
| CDI |
0 |
0 |
0 |
121 |
2918 |
7895 |
1135 |
258 |
| VCDI |
0 |
0 |
0 |
11 |
593 |
5443 |
26546 |
52294 |
|
...date precedes bulletin
|
Date: 2025-05-08:
| 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 |
67226 |
15841 |
206 |
215 |
5 |
1 |
0 |
0 |
| OW |
75 |
2623 |
634 |
996 |
182 |
18 |
1 |
14 |
| VODI |
14 |
256 |
303 |
3176 |
1499 |
108 |
16 |
44 |
| ODI |
0 |
28 |
12 |
655 |
3792 |
604 |
84 |
79 |
| CDI |
0 |
3 |
5 |
235 |
3371 |
6407 |
1816 |
189 |
| VCDI |
0 |
0 |
0 |
82 |
1161 |
7222 |
29487 |
46058 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
67207 |
15758 |
218 |
207 |
11 |
1 |
0 |
0 |
| OW |
92 |
2694 |
615 |
1017 |
197 |
18 |
2 |
19 |
| VODI |
16 |
266 |
304 |
3137 |
1559 |
124 |
18 |
43 |
| ODI |
0 |
30 |
18 |
673 |
3777 |
659 |
79 |
121 |
| CDI |
0 |
3 |
5 |
234 |
3326 |
6466 |
1956 |
167 |
| VCDI |
0 |
0 |
0 |
91 |
1140 |
7092 |
29349 |
46034 |
|
Date: 2025-05-10:
| 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 |
68880 |
14321 |
134 |
164 |
36 |
0 |
0 |
14 |
| OW |
120 |
3192 |
560 |
823 |
258 |
35 |
12 |
33 |
| VODI |
3 |
526 |
498 |
3157 |
1566 |
162 |
48 |
86 |
| ODI |
0 |
50 |
66 |
884 |
3253 |
741 |
145 |
96 |
| CDI |
0 |
105 |
111 |
436 |
3457 |
6038 |
2285 |
182 |
| VCDI |
0 |
9 |
22 |
267 |
1164 |
6314 |
28804 |
45686 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
68872 |
14255 |
128 |
176 |
59 |
0 |
0 |
23 |
| OW |
128 |
3232 |
553 |
854 |
283 |
43 |
15 |
37 |
| VODI |
3 |
551 |
516 |
3104 |
1505 |
172 |
47 |
79 |
| ODI |
0 |
49 |
66 |
884 |
3310 |
788 |
140 |
97 |
| CDI |
0 |
100 |
94 |
425 |
3399 |
6250 |
2261 |
216 |
| VCDI |
0 |
16 |
34 |
288 |
1178 |
6037 |
28831 |
45645 |
|
Date: 2025-05-12:
| 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 |
69923 |
14857 |
122 |
150 |
14 |
0 |
0 |
5 |
| OW |
33 |
2968 |
823 |
1015 |
79 |
8 |
3 |
19 |
| VODI |
0 |
113 |
176 |
4458 |
1169 |
72 |
13 |
39 |
| ODI |
0 |
8 |
19 |
725 |
5367 |
471 |
39 |
83 |
| CDI |
0 |
0 |
0 |
183 |
3288 |
7781 |
1014 |
157 |
| VCDI |
0 |
0 |
0 |
43 |
344 |
4229 |
32326 |
42607 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
69854 |
13617 |
119 |
179 |
24 |
2 |
1 |
76 |
| OW |
102 |
3266 |
397 |
1101 |
219 |
25 |
7 |
50 |
| VODI |
0 |
839 |
426 |
3046 |
1629 |
235 |
67 |
58 |
| ODI |
0 |
100 |
99 |
1280 |
3146 |
885 |
192 |
79 |
| CDI |
0 |
124 |
90 |
694 |
4243 |
5534 |
3178 |
339 |
| VCDI |
0 |
0 |
9 |
274 |
1000 |
5880 |
29950 |
42308 |
|
Date: 2025-05-14:
| 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 |
71474 |
13895 |
120 |
108 |
0 |
0 |
1 |
10 |
| OW |
24 |
3601 |
735 |
783 |
133 |
7 |
2 |
31 |
| VODI |
0 |
736 |
539 |
3454 |
1338 |
96 |
43 |
77 |
| ODI |
0 |
153 |
57 |
1021 |
4054 |
618 |
169 |
57 |
| CDI |
0 |
8 |
6 |
343 |
3684 |
7671 |
2229 |
160 |
| VCDI |
0 |
0 |
0 |
26 |
351 |
10675 |
49127 |
17127 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
71302 |
12784 |
85 |
108 |
14 |
1 |
1 |
94 |
| OW |
196 |
3673 |
562 |
766 |
156 |
7 |
8 |
46 |
| VODI |
0 |
1546 |
554 |
2602 |
1515 |
188 |
105 |
50 |
| ODI |
0 |
226 |
131 |
1338 |
2971 |
1052 |
302 |
40 |
| CDI |
0 |
164 |
103 |
682 |
4190 |
6771 |
3707 |
150 |
| VCDI |
0 |
0 |
22 |
239 |
714 |
11048 |
47448 |
17082 |
|
Date: 2025-05-16:
| 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 |
70729 |
14767 |
143 |
163 |
17 |
0 |
0 |
19 |
| OW |
29 |
3995 |
657 |
912 |
151 |
10 |
6 |
41 |
| VODI |
0 |
651 |
618 |
3753 |
1292 |
84 |
70 |
75 |
| ODI |
0 |
106 |
81 |
1513 |
3407 |
585 |
238 |
71 |
| CDI |
0 |
32 |
22 |
613 |
3948 |
7093 |
2800 |
193 |
| VCDI |
0 |
114 |
15 |
148 |
923 |
6178 |
37699 |
30782 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
70572 |
13922 |
155 |
219 |
33 |
3 |
0 |
113 |
| OW |
182 |
3786 |
516 |
1074 |
174 |
18 |
20 |
38 |
| VODI |
4 |
1324 |
551 |
2803 |
1340 |
167 |
130 |
49 |
| ODI |
0 |
259 |
154 |
1691 |
2592 |
1010 |
386 |
43 |
| CDI |
0 |
284 |
104 |
980 |
4595 |
6871 |
3972 |
195 |
| VCDI |
0 |
90 |
56 |
335 |
1004 |
5881 |
36305 |
30743 |
|
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