Validation of sea ice concentration - Full domain
Bulletin date: 2025-07-31
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-07-25:
| 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 |
95598 |
14941 |
174 |
51 |
11 |
0 |
0 |
0 |
| OW |
1925 |
5201 |
1192 |
1326 |
108 |
2 |
0 |
0 |
| VODI |
2295 |
658 |
674 |
4026 |
2245 |
51 |
0 |
0 |
| ODI |
0 |
26 |
36 |
684 |
7950 |
2427 |
9 |
0 |
| CDI |
0 |
62 |
33 |
83 |
8130 |
24937 |
266 |
0 |
| VCDI |
0 |
6 |
18 |
96 |
979 |
4392 |
198 |
0 |
|
...date precedes bulletin
|
Date: 2025-07-27:
| 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 |
96677 |
15115 |
155 |
79 |
4 |
0 |
0 |
0 |
| OW |
2027 |
5056 |
1072 |
1315 |
127 |
2 |
0 |
0 |
| VODI |
2261 |
852 |
713 |
4138 |
2036 |
90 |
0 |
0 |
| ODI |
0 |
63 |
51 |
1016 |
7433 |
2135 |
31 |
0 |
| CDI |
0 |
88 |
42 |
108 |
8797 |
21618 |
891 |
0 |
| VCDI |
0 |
27 |
13 |
100 |
656 |
5400 |
622 |
0 |
|
...date precedes bulletin
|
Date: 2025-07-29:
| 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 |
98436 |
16422 |
270 |
80 |
5 |
0 |
0 |
0 |
| OW |
1964 |
4114 |
1441 |
1230 |
49 |
3 |
0 |
0 |
| VODI |
2008 |
135 |
419 |
4813 |
1550 |
7 |
0 |
0 |
| ODI |
0 |
44 |
22 |
786 |
11606 |
1945 |
8 |
0 |
| CDI |
0 |
41 |
31 |
93 |
5121 |
23408 |
671 |
0 |
| VCDI |
0 |
2 |
1 |
10 |
119 |
2697 |
1259 |
0 |
|
...date precedes bulletin
|
Date: 2025-07-31:
| 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 |
99307 |
15780 |
191 |
58 |
4 |
0 |
0 |
0 |
| OW |
1987 |
4397 |
1196 |
1122 |
62 |
3 |
0 |
0 |
| VODI |
1972 |
387 |
679 |
4426 |
2194 |
18 |
1 |
0 |
| ODI |
0 |
55 |
26 |
655 |
10967 |
4286 |
1 |
0 |
| CDI |
0 |
41 |
34 |
119 |
5416 |
19816 |
1266 |
0 |
| VCDI |
0 |
0 |
0 |
3 |
172 |
3509 |
660 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
99305 |
15919 |
207 |
67 |
3 |
0 |
0 |
0 |
| OW |
1987 |
4218 |
1159 |
1252 |
79 |
3 |
0 |
0 |
| VODI |
1974 |
428 |
705 |
4290 |
2175 |
26 |
1 |
0 |
| ODI |
0 |
52 |
16 |
641 |
10659 |
4389 |
7 |
0 |
| CDI |
0 |
43 |
39 |
130 |
5739 |
19633 |
1263 |
0 |
| VCDI |
0 |
0 |
0 |
3 |
160 |
3581 |
657 |
0 |
|
Date: 2025-08-02:
| 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 |
98525 |
16418 |
192 |
65 |
3 |
0 |
0 |
0 |
| OW |
2146 |
4803 |
1207 |
993 |
54 |
0 |
0 |
0 |
| VODI |
1927 |
786 |
949 |
4960 |
1784 |
97 |
0 |
0 |
| ODI |
0 |
79 |
58 |
1455 |
7301 |
7826 |
425 |
0 |
| CDI |
0 |
86 |
39 |
174 |
4373 |
14404 |
4974 |
125 |
| VCDI |
0 |
1 |
0 |
0 |
156 |
1765 |
2660 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
98529 |
16636 |
218 |
79 |
3 |
0 |
0 |
0 |
| OW |
2139 |
4555 |
1247 |
1149 |
54 |
0 |
0 |
0 |
| VODI |
1930 |
815 |
887 |
4640 |
2003 |
143 |
1 |
0 |
| ODI |
0 |
75 |
48 |
1597 |
6977 |
7169 |
674 |
0 |
| CDI |
0 |
91 |
45 |
182 |
4490 |
14844 |
4640 |
124 |
| VCDI |
0 |
1 |
0 |
0 |
144 |
1936 |
2744 |
1 |
|
Date: 2025-08-04:
| 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 |
101883 |
15204 |
166 |
74 |
10 |
0 |
0 |
0 |
| OW |
2062 |
4868 |
1721 |
1152 |
32 |
0 |
0 |
0 |
| VODI |
1917 |
88 |
230 |
6124 |
1317 |
2 |
0 |
0 |
| ODI |
0 |
10 |
9 |
529 |
9918 |
800 |
0 |
0 |
| CDI |
0 |
7 |
10 |
47 |
3116 |
20617 |
471 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
11 |
1321 |
6588 |
506 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
101816 |
13336 |
161 |
93 |
7 |
0 |
0 |
0 |
| OW |
2148 |
5187 |
979 |
1131 |
48 |
0 |
0 |
0 |
| VODI |
1898 |
1424 |
893 |
5009 |
1896 |
127 |
0 |
0 |
| ODI |
0 |
128 |
65 |
1418 |
6994 |
7708 |
418 |
0 |
| CDI |
0 |
96 |
29 |
253 |
5371 |
14336 |
3798 |
367 |
| VCDI |
0 |
6 |
9 |
22 |
88 |
569 |
2843 |
139 |
|
Date: 2025-08-06:
| 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 |
103031 |
14357 |
197 |
129 |
19 |
1 |
0 |
0 |
| OW |
2208 |
4782 |
1313 |
1271 |
90 |
1 |
0 |
0 |
| VODI |
1883 |
400 |
511 |
5137 |
1799 |
72 |
5 |
0 |
| ODI |
0 |
11 |
27 |
737 |
7772 |
2046 |
609 |
0 |
| CDI |
0 |
6 |
6 |
77 |
4728 |
17494 |
3395 |
0 |
| VCDI |
0 |
0 |
1 |
4 |
8 |
1419 |
4861 |
403 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
102892 |
12411 |
201 |
158 |
21 |
1 |
0 |
0 |
| OW |
2380 |
5210 |
911 |
1134 |
116 |
0 |
0 |
0 |
| VODI |
1850 |
1669 |
769 |
4572 |
2230 |
343 |
49 |
0 |
| ODI |
0 |
183 |
129 |
1173 |
6344 |
8028 |
798 |
0 |
| CDI |
0 |
80 |
41 |
296 |
5655 |
12252 |
6265 |
209 |
| VCDI |
0 |
3 |
4 |
22 |
50 |
409 |
1758 |
194 |
|
Date: 2025-08-08:
| 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 |
103997 |
13960 |
188 |
95 |
10 |
0 |
0 |
0 |
| OW |
2206 |
5125 |
1030 |
1025 |
118 |
3 |
0 |
0 |
| VODI |
1845 |
820 |
852 |
4599 |
1731 |
250 |
0 |
0 |
| ODI |
0 |
35 |
54 |
1045 |
8010 |
2053 |
116 |
0 |
| CDI |
0 |
4 |
16 |
144 |
4472 |
17068 |
4590 |
0 |
| VCDI |
0 |
1 |
4 |
4 |
15 |
170 |
3555 |
1600 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
103824 |
11823 |
185 |
108 |
7 |
0 |
0 |
0 |
| OW |
2409 |
5511 |
802 |
1120 |
160 |
2 |
0 |
0 |
| VODI |
1815 |
2235 |
959 |
4016 |
2311 |
319 |
0 |
0 |
| ODI |
0 |
268 |
142 |
1267 |
5895 |
7643 |
1206 |
0 |
| CDI |
0 |
106 |
49 |
383 |
5958 |
11478 |
6063 |
1033 |
| VCDI |
0 |
2 |
7 |
18 |
25 |
102 |
992 |
567 |
|
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