Validation of sea ice concentration - Full domain
Bulletin date: 2025-05-22
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
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 |
|
...date precedes bulletin
|
Date: 2025-05-18:
| 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 |
71285 |
14182 |
143 |
180 |
12 |
1 |
0 |
18 |
| OW |
46 |
4206 |
518 |
1191 |
110 |
16 |
0 |
35 |
| VODI |
0 |
875 |
594 |
3599 |
1256 |
98 |
22 |
80 |
| ODI |
0 |
127 |
97 |
1449 |
3506 |
607 |
276 |
125 |
| CDI |
0 |
4 |
27 |
799 |
4247 |
6965 |
2621 |
995 |
| VCDI |
0 |
0 |
0 |
47 |
773 |
5896 |
33247 |
34468 |
|
...date precedes bulletin
|
Date: 2025-05-20:
| 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 |
71505 |
16084 |
195 |
242 |
17 |
1 |
1 |
13 |
| OW |
7 |
3318 |
1024 |
1355 |
134 |
10 |
0 |
15 |
| VODI |
0 |
205 |
311 |
4434 |
1324 |
66 |
3 |
49 |
| ODI |
0 |
16 |
16 |
839 |
4745 |
632 |
73 |
65 |
| CDI |
0 |
0 |
0 |
278 |
2991 |
8923 |
1691 |
189 |
| VCDI |
0 |
0 |
0 |
26 |
354 |
6558 |
32322 |
34712 |
|
...date precedes bulletin
|
Date: 2025-05-22:
| 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 |
72470 |
15323 |
195 |
320 |
12 |
8 |
0 |
2 |
| OW |
134 |
3072 |
913 |
1632 |
130 |
26 |
2 |
15 |
| VODI |
0 |
351 |
367 |
4192 |
1359 |
112 |
27 |
58 |
| ODI |
0 |
33 |
49 |
1025 |
4543 |
603 |
130 |
80 |
| CDI |
0 |
0 |
2 |
414 |
3542 |
9338 |
2793 |
617 |
| VCDI |
0 |
0 |
0 |
18 |
335 |
6083 |
29352 |
35066 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
72419 |
15366 |
197 |
358 |
22 |
12 |
1 |
7 |
| OW |
185 |
3038 |
897 |
1508 |
127 |
24 |
0 |
19 |
| VODI |
0 |
347 |
380 |
4261 |
1419 |
104 |
27 |
52 |
| ODI |
0 |
28 |
50 |
1013 |
4498 |
661 |
149 |
80 |
| CDI |
0 |
0 |
2 |
443 |
3500 |
9342 |
2777 |
544 |
| VCDI |
0 |
0 |
0 |
18 |
355 |
6027 |
29350 |
35136 |
|
Date: 2025-05-24:
| 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 |
73608 |
14550 |
169 |
201 |
25 |
5 |
0 |
0 |
| OW |
12 |
3519 |
905 |
1490 |
156 |
28 |
7 |
2 |
| VODI |
0 |
600 |
587 |
3784 |
1473 |
183 |
71 |
7 |
| ODI |
0 |
32 |
82 |
1141 |
4558 |
731 |
193 |
3 |
| CDI |
0 |
0 |
3 |
486 |
3839 |
9603 |
2777 |
158 |
| VCDI |
0 |
0 |
0 |
52 |
472 |
7193 |
26741 |
35297 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
73547 |
14557 |
174 |
247 |
37 |
6 |
2 |
0 |
| OW |
73 |
3504 |
924 |
1392 |
149 |
24 |
16 |
4 |
| VODI |
0 |
603 |
566 |
3835 |
1531 |
182 |
85 |
4 |
| ODI |
0 |
37 |
77 |
1097 |
4475 |
766 |
195 |
3 |
| CDI |
0 |
0 |
5 |
531 |
3863 |
9774 |
2920 |
114 |
| VCDI |
0 |
0 |
0 |
52 |
468 |
6991 |
26571 |
35342 |
|
Date: 2025-05-26:
| 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 |
75811 |
14622 |
163 |
137 |
24 |
1 |
1 |
0 |
| OW |
0 |
2901 |
1242 |
1262 |
107 |
15 |
4 |
0 |
| VODI |
0 |
101 |
102 |
4643 |
1099 |
58 |
15 |
6 |
| ODI |
0 |
5 |
5 |
575 |
5954 |
467 |
48 |
19 |
| CDI |
0 |
9 |
0 |
120 |
2838 |
12475 |
1145 |
172 |
| VCDI |
0 |
12 |
0 |
15 |
242 |
5272 |
35511 |
27545 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
75751 |
13007 |
147 |
202 |
51 |
3 |
1 |
0 |
| OW |
60 |
3673 |
745 |
1294 |
187 |
37 |
13 |
3 |
| VODI |
0 |
822 |
524 |
3494 |
1669 |
241 |
54 |
64 |
| ODI |
0 |
111 |
85 |
1163 |
4059 |
1120 |
309 |
86 |
| CDI |
0 |
24 |
11 |
559 |
3605 |
9253 |
5326 |
238 |
| VCDI |
0 |
13 |
0 |
40 |
693 |
7634 |
31021 |
27351 |
|
Date: 2025-05-28:
| 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 |
75954 |
14987 |
174 |
161 |
8 |
4 |
1 |
0 |
| OW |
1 |
3144 |
996 |
1443 |
168 |
24 |
1 |
0 |
| VODI |
0 |
287 |
433 |
3895 |
1249 |
89 |
11 |
0 |
| ODI |
0 |
24 |
21 |
990 |
4875 |
509 |
50 |
0 |
| CDI |
0 |
7 |
0 |
307 |
4143 |
10972 |
2789 |
10 |
| VCDI |
0 |
5 |
0 |
102 |
2342 |
5147 |
30090 |
29330 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
75953 |
13299 |
129 |
195 |
15 |
4 |
1 |
0 |
| OW |
2 |
3823 |
718 |
1598 |
257 |
23 |
1 |
0 |
| VODI |
0 |
1048 |
582 |
3021 |
1813 |
229 |
47 |
0 |
| ODI |
0 |
190 |
167 |
1261 |
3787 |
1140 |
377 |
0 |
| CDI |
0 |
85 |
28 |
690 |
4078 |
9260 |
6501 |
584 |
| VCDI |
0 |
9 |
0 |
133 |
2835 |
6089 |
26015 |
28756 |
|
Date: 2025-05-30:
| 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 |
76881 |
14285 |
148 |
176 |
11 |
6 |
0 |
0 |
| OW |
44 |
3644 |
868 |
1202 |
174 |
9 |
3 |
0 |
| VODI |
1 |
690 |
521 |
3637 |
1262 |
96 |
24 |
0 |
| ODI |
0 |
77 |
65 |
1048 |
4500 |
668 |
103 |
0 |
| CDI |
0 |
5 |
7 |
463 |
4589 |
9689 |
4429 |
78 |
| VCDI |
0 |
0 |
0 |
237 |
824 |
9361 |
28378 |
26540 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
76828 |
12586 |
138 |
236 |
103 |
6 |
1 |
0 |
| OW |
98 |
3918 |
644 |
1658 |
342 |
29 |
7 |
0 |
| VODI |
0 |
1652 |
495 |
2554 |
1805 |
275 |
52 |
0 |
| ODI |
0 |
394 |
242 |
1205 |
3468 |
1461 |
261 |
0 |
| CDI |
0 |
151 |
90 |
828 |
4428 |
8903 |
7109 |
606 |
| VCDI |
0 |
0 |
0 |
282 |
1214 |
9155 |
25507 |
26012 |
|
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