Validation of sea ice concentration - American sector
Bulletin date: 2025-03-27
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-03-21:
| 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 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
0 |
0 |
0 |
0 |
5 |
0 |
0 |
| ODI |
0 |
2 |
1 |
0 |
0 |
18 |
9 |
0 |
| CDI |
0 |
4 |
2 |
4 |
6 |
88 |
122 |
0 |
| VCDI |
0 |
13 |
11 |
27 |
143 |
2824 |
16195 |
26392 |
|
...date precedes bulletin
|
Date: 2025-03-23:
| 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 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
0 |
0 |
8 |
3 |
0 |
| CDI |
0 |
1 |
2 |
1 |
2 |
35 |
146 |
8 |
| VCDI |
0 |
7 |
12 |
22 |
62 |
2277 |
13931 |
29349 |
|
...date precedes bulletin
|
Date: 2025-03-25:
| 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 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
0 |
0 |
0 |
2 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
0 |
9 |
17 |
0 |
0 |
| CDI |
0 |
2 |
1 |
2 |
7 |
40 |
55 |
5 |
| VCDI |
0 |
0 |
3 |
25 |
49 |
977 |
13844 |
30828 |
|
...date precedes bulletin
|
Date: 2025-03-27:
| 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 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
0 |
0 |
0 |
0 |
2 |
0 |
0 |
| ODI |
0 |
0 |
0 |
0 |
3 |
21 |
0 |
0 |
| CDI |
0 |
1 |
3 |
4 |
6 |
70 |
43 |
7 |
| VCDI |
0 |
0 |
4 |
31 |
46 |
1390 |
13249 |
30986 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
0 |
0 |
0 |
0 |
2 |
0 |
0 |
| ODI |
0 |
0 |
0 |
1 |
3 |
22 |
1 |
0 |
| CDI |
0 |
1 |
4 |
5 |
10 |
85 |
62 |
10 |
| VCDI |
0 |
0 |
3 |
29 |
42 |
1374 |
13229 |
30983 |
|
Date: 2025-03-29:
| 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 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
0 |
0 |
0 |
0 |
2 |
0 |
0 |
| ODI |
0 |
0 |
0 |
0 |
1 |
23 |
0 |
0 |
| CDI |
0 |
3 |
5 |
4 |
6 |
53 |
68 |
7 |
| VCDI |
0 |
0 |
1 |
23 |
65 |
1583 |
12370 |
31652 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
| ODI |
0 |
0 |
0 |
0 |
1 |
21 |
1 |
0 |
| CDI |
0 |
3 |
5 |
9 |
7 |
64 |
82 |
9 |
| VCDI |
0 |
0 |
1 |
18 |
64 |
1575 |
12355 |
31650 |
|
Date: 2025-03-31:
| 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 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| ODI |
0 |
2 |
4 |
5 |
4 |
23 |
8 |
0 |
| CDI |
0 |
2 |
2 |
18 |
17 |
116 |
74 |
0 |
| VCDI |
0 |
0 |
0 |
3 |
85 |
1647 |
16921 |
26935 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
0 |
0 |
9 |
8 |
0 |
| CDI |
0 |
4 |
5 |
6 |
14 |
90 |
142 |
0 |
| VCDI |
0 |
0 |
1 |
20 |
92 |
1687 |
16853 |
26935 |
|
Date: 2025-04-02:
| 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 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
0 |
0 |
4 |
2 |
0 |
| CDI |
0 |
0 |
0 |
0 |
2 |
27 |
42 |
8 |
| VCDI |
0 |
0 |
0 |
0 |
85 |
1426 |
16823 |
27447 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
0 |
44 |
33 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
87 |
1413 |
16834 |
27455 |
|
Date: 2025-04-04:
| 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 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
0 |
0 |
0 |
1 |
2 |
6 |
0 |
| ODI |
0 |
0 |
0 |
0 |
5 |
22 |
25 |
0 |
| CDI |
0 |
0 |
0 |
0 |
5 |
83 |
162 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
66 |
1155 |
11224 |
33110 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
0 |
4 |
14 |
13 |
0 |
| CDI |
0 |
0 |
0 |
0 |
9 |
84 |
102 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
64 |
1164 |
11302 |
33110 |
|
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