Validation of sea ice concentration - Full domain
Bulletin date: 2025-06-26
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-06-20:
| 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 |
71089 |
15694 |
109 |
48 |
3 |
0 |
0 |
0 |
| OW |
1170 |
5286 |
768 |
679 |
66 |
3 |
0 |
0 |
| VODI |
3281 |
1781 |
907 |
2724 |
1191 |
116 |
29 |
0 |
| ODI |
0 |
182 |
200 |
1255 |
3068 |
1047 |
236 |
0 |
| CDI |
0 |
56 |
74 |
514 |
3301 |
7268 |
3158 |
0 |
| VCDI |
0 |
3 |
7 |
42 |
1927 |
14596 |
31289 |
7643 |
|
...date precedes bulletin
|
Date: 2025-06-22:
| 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 |
71171 |
15998 |
92 |
46 |
5 |
0 |
0 |
0 |
| OW |
1232 |
5586 |
694 |
657 |
69 |
8 |
2 |
0 |
| VODI |
3263 |
2089 |
944 |
2428 |
1051 |
140 |
35 |
0 |
| ODI |
0 |
265 |
253 |
1167 |
3035 |
1398 |
148 |
0 |
| CDI |
0 |
77 |
85 |
655 |
3576 |
8218 |
2702 |
27 |
| VCDI |
0 |
4 |
10 |
42 |
2135 |
15701 |
26675 |
9127 |
|
...date precedes bulletin
|
Date: 2025-06-24:
| 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 |
73190 |
17149 |
146 |
53 |
6 |
1 |
0 |
0 |
| OW |
1154 |
5050 |
886 |
694 |
55 |
3 |
2 |
0 |
| VODI |
3225 |
787 |
749 |
2939 |
1375 |
139 |
20 |
0 |
| ODI |
0 |
53 |
74 |
1036 |
4425 |
1467 |
104 |
0 |
| CDI |
0 |
45 |
38 |
322 |
3093 |
13008 |
2639 |
0 |
| VCDI |
0 |
0 |
2 |
8 |
4901 |
12709 |
24966 |
4297 |
|
...date precedes bulletin
|
Date: 2025-06-26:
| 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 |
74953 |
16368 |
103 |
66 |
15 |
0 |
0 |
0 |
| OW |
1258 |
5055 |
726 |
649 |
63 |
7 |
0 |
0 |
| VODI |
3203 |
1143 |
866 |
2616 |
1074 |
345 |
25 |
0 |
| ODI |
0 |
120 |
140 |
1538 |
3500 |
1461 |
161 |
0 |
| CDI |
0 |
70 |
82 |
587 |
2965 |
14109 |
3256 |
0 |
| VCDI |
0 |
0 |
1 |
33 |
1629 |
18830 |
19568 |
4225 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
74957 |
16698 |
141 |
100 |
17 |
0 |
0 |
0 |
| OW |
1253 |
4682 |
664 |
612 |
51 |
11 |
1 |
0 |
| VODI |
3204 |
1162 |
875 |
2628 |
1081 |
335 |
25 |
0 |
| ODI |
0 |
149 |
153 |
1497 |
3383 |
1556 |
182 |
0 |
| CDI |
0 |
64 |
83 |
613 |
3064 |
13967 |
3733 |
28 |
| VCDI |
0 |
1 |
2 |
39 |
1650 |
18883 |
19069 |
4197 |
|
Date: 2025-06-28:
| 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 |
76015 |
16515 |
134 |
78 |
20 |
3 |
0 |
0 |
| OW |
1245 |
5206 |
630 |
569 |
95 |
14 |
1 |
0 |
| VODI |
3185 |
1518 |
815 |
2434 |
1064 |
255 |
30 |
0 |
| ODI |
0 |
293 |
275 |
2007 |
2584 |
1317 |
143 |
0 |
| CDI |
0 |
74 |
92 |
709 |
3971 |
13149 |
2112 |
0 |
| VCDI |
0 |
0 |
0 |
14 |
2076 |
20044 |
19913 |
2211 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
75973 |
16745 |
171 |
105 |
21 |
5 |
1 |
0 |
| OW |
1286 |
4946 |
606 |
539 |
74 |
15 |
1 |
0 |
| VODI |
3186 |
1517 |
777 |
2423 |
997 |
269 |
31 |
0 |
| ODI |
0 |
317 |
278 |
1858 |
2918 |
1484 |
154 |
0 |
| CDI |
0 |
81 |
114 |
864 |
3648 |
12966 |
2333 |
0 |
| VCDI |
0 |
0 |
0 |
22 |
2152 |
20043 |
19679 |
2211 |
|
Date: 2025-06-30:
| 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 |
75809 |
19826 |
150 |
114 |
10 |
4 |
0 |
0 |
| OW |
1223 |
5101 |
1421 |
1069 |
52 |
6 |
0 |
0 |
| VODI |
3126 |
168 |
423 |
3768 |
1270 |
22 |
4 |
0 |
| ODI |
0 |
13 |
24 |
643 |
4826 |
787 |
24 |
0 |
| CDI |
0 |
2 |
3 |
109 |
4392 |
17786 |
608 |
0 |
| VCDI |
0 |
0 |
0 |
33 |
1095 |
15234 |
19843 |
1822 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
75688 |
17879 |
149 |
122 |
19 |
8 |
0 |
0 |
| OW |
1299 |
4858 |
585 |
638 |
113 |
11 |
2 |
0 |
| VODI |
3171 |
1706 |
743 |
2302 |
1109 |
292 |
28 |
0 |
| ODI |
0 |
509 |
412 |
1844 |
3229 |
1418 |
126 |
0 |
| CDI |
0 |
158 |
130 |
766 |
4995 |
12473 |
1951 |
0 |
| VCDI |
0 |
0 |
2 |
64 |
2180 |
19637 |
18372 |
1822 |
|
Date: 2025-07-02:
| 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 |
78116 |
18173 |
155 |
98 |
9 |
0 |
1 |
0 |
| OW |
1209 |
5169 |
1296 |
1147 |
116 |
27 |
3 |
0 |
| VODI |
3108 |
581 |
630 |
2804 |
1211 |
96 |
5 |
0 |
| ODI |
0 |
49 |
74 |
879 |
4902 |
990 |
29 |
0 |
| CDI |
0 |
12 |
45 |
289 |
6632 |
15293 |
1148 |
0 |
| VCDI |
0 |
1 |
1 |
2 |
1174 |
17104 |
17395 |
837 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
78035 |
15996 |
138 |
80 |
15 |
0 |
1 |
0 |
| OW |
1253 |
4861 |
635 |
587 |
190 |
46 |
2 |
0 |
| VODI |
3145 |
2168 |
812 |
2060 |
1114 |
300 |
21 |
0 |
| ODI |
0 |
810 |
466 |
1613 |
3505 |
1797 |
56 |
0 |
| CDI |
0 |
148 |
141 |
820 |
6854 |
10758 |
2045 |
0 |
| VCDI |
0 |
2 |
9 |
59 |
2366 |
20609 |
16456 |
837 |
|
Date: 2025-07-04:
| 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 |
80183 |
16784 |
151 |
114 |
41 |
6 |
0 |
0 |
| OW |
1403 |
5551 |
1043 |
1039 |
158 |
50 |
0 |
0 |
| VODI |
2964 |
883 |
620 |
2218 |
1328 |
168 |
10 |
0 |
| ODI |
0 |
158 |
106 |
1178 |
4799 |
1641 |
41 |
0 |
| CDI |
0 |
46 |
79 |
418 |
6178 |
12633 |
1205 |
0 |
| VCDI |
0 |
1 |
1 |
5 |
4252 |
17574 |
15780 |
1 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
79914 |
14663 |
156 |
89 |
16 |
1 |
0 |
0 |
| OW |
1485 |
4809 |
572 |
577 |
256 |
65 |
7 |
0 |
| VODI |
3131 |
2656 |
707 |
1785 |
1209 |
301 |
10 |
0 |
| ODI |
10 |
1087 |
356 |
1475 |
3854 |
1620 |
98 |
0 |
| CDI |
10 |
205 |
202 |
983 |
6560 |
10432 |
1593 |
0 |
| VCDI |
0 |
3 |
7 |
63 |
4861 |
19653 |
15328 |
1 |
|
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