Validation of sea ice concentration - American sector
Bulletin date: 2025-03-06
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-02-28:
| 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 |
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 |
1 |
0 |
0 |
0 |
| CDI |
0 |
0 |
0 |
4 |
15 |
24 |
27 |
19 |
| VCDI |
0 |
0 |
0 |
43 |
180 |
1290 |
11335 |
32928 |
|
...date precedes bulletin
|
Date: 2025-03-02:
| 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 |
5 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
4 |
58 |
25 |
0 |
| VCDI |
0 |
0 |
0 |
9 |
93 |
1446 |
10365 |
33861 |
|
...date precedes bulletin
|
Date: 2025-03-04:
| 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 |
0 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
0 |
1 |
4 |
0 |
0 |
| CDI |
0 |
0 |
1 |
0 |
1 |
78 |
17 |
2 |
| VCDI |
0 |
0 |
0 |
16 |
69 |
1551 |
9306 |
34820 |
|
...date precedes bulletin
|
Date: 2025-03-06:
| 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 |
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 |
1 |
1 |
9 |
4 |
0 |
| CDI |
0 |
0 |
1 |
3 |
10 |
86 |
59 |
29 |
| VCDI |
0 |
0 |
4 |
12 |
63 |
1590 |
13165 |
30829 |
|
|
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 |
1 |
2 |
9 |
5 |
0 |
| CDI |
0 |
0 |
2 |
3 |
10 |
84 |
66 |
10 |
| VCDI |
0 |
0 |
3 |
12 |
62 |
1592 |
13157 |
30848 |
|
Date: 2025-03-08:
| 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 |
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 |
1 |
5 |
0 |
| CDI |
0 |
0 |
2 |
7 |
15 |
56 |
66 |
29 |
| VCDI |
0 |
1 |
7 |
32 |
98 |
1300 |
14654 |
29593 |
|
|
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 |
1 |
0 |
0 |
3 |
15 |
0 |
| CDI |
0 |
0 |
1 |
7 |
14 |
39 |
64 |
27 |
| VCDI |
0 |
1 |
7 |
32 |
99 |
1315 |
14646 |
29595 |
|
Date: 2025-03-10:
| 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 |
1 |
1 |
0 |
0 |
0 |
0 |
0 |
| ODI |
0 |
5 |
3 |
5 |
11 |
17 |
4 |
0 |
| CDI |
0 |
6 |
5 |
20 |
48 |
164 |
93 |
1 |
| VCDI |
0 |
10 |
17 |
70 |
134 |
978 |
13099 |
31174 |
|
|
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 |
0 |
0 |
| ODI |
0 |
2 |
1 |
5 |
8 |
19 |
5 |
0 |
| CDI |
0 |
3 |
2 |
15 |
37 |
82 |
60 |
1 |
| VCDI |
0 |
17 |
23 |
75 |
147 |
1056 |
13131 |
31174 |
|
Date: 2025-03-12:
| 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 |
3 |
0 |
0 |
0 |
2 |
7 |
0 |
| CDI |
0 |
4 |
3 |
5 |
11 |
67 |
92 |
1 |
| VCDI |
0 |
2 |
7 |
46 |
97 |
1004 |
12315 |
32200 |
|
|
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 |
5 |
1 |
0 |
| CDI |
0 |
0 |
1 |
1 |
8 |
80 |
58 |
0 |
| VCDI |
0 |
9 |
9 |
50 |
100 |
988 |
12355 |
32201 |
|
Date: 2025-03-14:
| 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 |
5 |
1 |
0 |
1 |
6 |
7 |
0 |
| CDI |
0 |
10 |
0 |
0 |
3 |
65 |
53 |
12 |
| VCDI |
0 |
24 |
14 |
33 |
113 |
2274 |
14084 |
29161 |
|
|
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 |
1 |
14 |
5 |
0 |
| CDI |
0 |
1 |
1 |
0 |
3 |
72 |
44 |
1 |
| VCDI |
0 |
38 |
14 |
33 |
113 |
2259 |
14095 |
29172 |
|
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