Validation of sea ice concentration - Full domain
Bulletin date: 2025-05-29
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-05-23:
| 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 |
61535 |
13104 |
123 |
85 |
9 |
0 |
1 |
0 |
| OW |
846 |
3207 |
730 |
804 |
140 |
14 |
1 |
10 |
| VODI |
2271 |
1040 |
664 |
2356 |
1140 |
203 |
59 |
48 |
| ODI |
1316 |
211 |
187 |
1160 |
3086 |
1142 |
253 |
59 |
| CDI |
0 |
78 |
96 |
561 |
2561 |
9020 |
3957 |
103 |
| VCDI |
0 |
13 |
18 |
88 |
358 |
7610 |
45187 |
15356 |
|
...date precedes bulletin
|
Date: 2025-05-25:
| 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 |
60166 |
14722 |
108 |
124 |
2 |
0 |
0 |
0 |
| OW |
850 |
3301 |
697 |
769 |
117 |
27 |
20 |
0 |
| VODI |
2325 |
1167 |
693 |
2204 |
1153 |
275 |
127 |
48 |
| ODI |
1255 |
215 |
231 |
1240 |
3213 |
1351 |
359 |
89 |
| CDI |
0 |
104 |
105 |
556 |
2428 |
9378 |
3782 |
128 |
| VCDI |
0 |
27 |
21 |
136 |
494 |
9704 |
46943 |
10156 |
|
...date precedes bulletin
|
Date: 2025-05-27:
| 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 |
62421 |
14296 |
118 |
50 |
1 |
0 |
0 |
0 |
| OW |
852 |
3190 |
692 |
746 |
109 |
24 |
2 |
0 |
| VODI |
2379 |
875 |
718 |
2374 |
1009 |
208 |
28 |
0 |
| ODI |
1197 |
109 |
131 |
1148 |
3574 |
1313 |
94 |
0 |
| CDI |
0 |
77 |
58 |
354 |
2626 |
10059 |
2842 |
2 |
| VCDI |
0 |
11 |
15 |
130 |
698 |
9303 |
43841 |
13136 |
|
...date precedes bulletin
|
Date: 2025-05-29:
| 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 |
64744 |
12414 |
61 |
29 |
4 |
0 |
0 |
0 |
| OW |
869 |
3389 |
642 |
738 |
150 |
24 |
3 |
0 |
| VODI |
2433 |
1154 |
655 |
2157 |
1052 |
181 |
39 |
0 |
| ODI |
1125 |
197 |
190 |
1170 |
3153 |
1202 |
104 |
0 |
| CDI |
0 |
89 |
98 |
513 |
3407 |
9752 |
4057 |
1 |
| VCDI |
0 |
26 |
29 |
205 |
1267 |
9525 |
42253 |
11709 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
64744 |
12539 |
82 |
42 |
6 |
0 |
1 |
0 |
| OW |
869 |
3309 |
623 |
726 |
150 |
25 |
3 |
0 |
| VODI |
2433 |
1119 |
667 |
2197 |
1074 |
192 |
41 |
0 |
| ODI |
1125 |
175 |
172 |
1152 |
3077 |
1206 |
124 |
0 |
| CDI |
0 |
100 |
96 |
479 |
3447 |
9458 |
4261 |
9 |
| VCDI |
0 |
27 |
35 |
216 |
1279 |
9803 |
42026 |
11701 |
|
Date: 2025-05-31:
| 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 |
65000 |
12286 |
71 |
56 |
11 |
0 |
0 |
0 |
| OW |
898 |
3598 |
678 |
793 |
163 |
16 |
9 |
0 |
| VODI |
2515 |
1478 |
650 |
2078 |
1107 |
180 |
37 |
0 |
| ODI |
1031 |
341 |
217 |
1254 |
2879 |
1009 |
203 |
0 |
| CDI |
0 |
144 |
117 |
691 |
3278 |
9129 |
6290 |
6 |
| VCDI |
0 |
17 |
32 |
321 |
614 |
8777 |
40546 |
12290 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
65000 |
12431 |
88 |
76 |
13 |
0 |
1 |
0 |
| OW |
898 |
3544 |
658 |
765 |
165 |
22 |
4 |
0 |
| VODI |
2515 |
1408 |
661 |
2121 |
1165 |
196 |
43 |
0 |
| ODI |
1031 |
301 |
214 |
1222 |
2784 |
1051 |
213 |
0 |
| CDI |
0 |
157 |
105 |
680 |
3281 |
8745 |
6091 |
6 |
| VCDI |
0 |
23 |
39 |
329 |
644 |
9097 |
40733 |
12290 |
|
Date: 2025-06-02:
| 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 |
64429 |
14031 |
155 |
75 |
3 |
3 |
8 |
0 |
| OW |
887 |
3746 |
927 |
836 |
95 |
14 |
19 |
0 |
| VODI |
2693 |
891 |
705 |
2825 |
1231 |
132 |
16 |
0 |
| ODI |
843 |
150 |
128 |
1122 |
4370 |
1340 |
90 |
0 |
| CDI |
0 |
42 |
44 |
301 |
2109 |
11572 |
3331 |
0 |
| VCDI |
0 |
11 |
11 |
112 |
718 |
6232 |
38220 |
16343 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
64429 |
12781 |
86 |
60 |
9 |
1 |
9 |
0 |
| OW |
886 |
3854 |
778 |
906 |
203 |
39 |
24 |
0 |
| VODI |
2626 |
1532 |
693 |
2103 |
1311 |
256 |
53 |
0 |
| ODI |
911 |
472 |
230 |
1291 |
2811 |
1253 |
346 |
0 |
| CDI |
0 |
203 |
152 |
738 |
3300 |
9022 |
6770 |
1 |
| VCDI |
0 |
29 |
31 |
173 |
892 |
8722 |
34482 |
16342 |
|
Date: 2025-06-04:
| 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 |
65477 |
13587 |
114 |
48 |
9 |
2 |
0 |
0 |
| OW |
895 |
4082 |
806 |
875 |
137 |
30 |
5 |
0 |
| VODI |
2868 |
977 |
801 |
2726 |
1330 |
148 |
29 |
0 |
| ODI |
656 |
89 |
131 |
1217 |
3831 |
1195 |
119 |
0 |
| CDI |
0 |
84 |
72 |
456 |
3145 |
11952 |
4131 |
6 |
| VCDI |
0 |
8 |
10 |
80 |
520 |
7456 |
33406 |
17300 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
65474 |
12129 |
86 |
80 |
11 |
1 |
0 |
0 |
| OW |
894 |
4182 |
679 |
1016 |
244 |
52 |
2 |
5 |
| VODI |
2769 |
1740 |
671 |
1857 |
1366 |
233 |
41 |
21 |
| ODI |
759 |
503 |
288 |
1358 |
2750 |
1194 |
354 |
48 |
| CDI |
0 |
234 |
174 |
934 |
3769 |
10331 |
6918 |
101 |
| VCDI |
0 |
39 |
36 |
157 |
832 |
8972 |
30375 |
17131 |
|
Date: 2025-06-06:
| 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 |
66932 |
12693 |
51 |
20 |
1 |
1 |
0 |
0 |
| OW |
907 |
4601 |
707 |
729 |
115 |
25 |
2 |
0 |
| VODI |
3511 |
1322 |
716 |
2369 |
1473 |
188 |
31 |
0 |
| ODI |
0 |
174 |
214 |
1339 |
3562 |
1301 |
232 |
0 |
| CDI |
0 |
69 |
65 |
543 |
3482 |
11633 |
4908 |
14 |
| VCDI |
0 |
26 |
25 |
58 |
472 |
4552 |
33589 |
18158 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
66997 |
11124 |
96 |
86 |
23 |
5 |
0 |
0 |
| OW |
978 |
4507 |
616 |
952 |
351 |
62 |
1 |
4 |
| VODI |
3086 |
2123 |
462 |
1479 |
1353 |
356 |
55 |
20 |
| ODI |
289 |
829 |
316 |
1158 |
2329 |
1335 |
307 |
49 |
| CDI |
0 |
257 |
248 |
1228 |
4074 |
10463 |
8342 |
631 |
| VCDI |
0 |
45 |
40 |
155 |
975 |
5479 |
30057 |
17468 |
|
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