Validation of sea ice concentration - American sector
Bulletin date: 2025-02-20
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-02-14:
| 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 |
3 |
1 |
1 |
2 |
0 |
0 |
0 |
| ODI |
0 |
6 |
2 |
9 |
13 |
4 |
0 |
0 |
| CDI |
0 |
6 |
2 |
11 |
20 |
80 |
20 |
2 |
| VCDI |
0 |
2 |
18 |
51 |
131 |
2558 |
14871 |
28053 |
|
...date precedes bulletin
|
Date: 2025-02-16:
| 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 |
7 |
3 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
8 |
15 |
0 |
0 |
0 |
| CDI |
0 |
0 |
0 |
6 |
47 |
8 |
29 |
26 |
| VCDI |
0 |
0 |
0 |
24 |
266 |
1644 |
12339 |
31444 |
|
...date precedes bulletin
|
Date: 2025-02-18:
| 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 |
8 |
11 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
7 |
16 |
3 |
2 |
0 |
| CDI |
0 |
0 |
0 |
4 |
36 |
40 |
56 |
14 |
| VCDI |
0 |
0 |
0 |
9 |
139 |
1882 |
12538 |
31101 |
|
...date precedes bulletin
|
Date: 2025-02-20:
| 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 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
1 |
4 |
11 |
12 |
0 |
0 |
0 |
| ODI |
0 |
0 |
3 |
10 |
17 |
5 |
0 |
0 |
| CDI |
0 |
0 |
0 |
15 |
45 |
83 |
39 |
0 |
| VCDI |
0 |
0 |
0 |
16 |
305 |
1462 |
11525 |
32313 |
|
|
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 |
4 |
11 |
13 |
0 |
0 |
0 |
| ODI |
0 |
0 |
3 |
9 |
17 |
5 |
0 |
0 |
| CDI |
0 |
0 |
0 |
19 |
56 |
91 |
33 |
0 |
| VCDI |
0 |
0 |
0 |
13 |
293 |
1454 |
11531 |
32313 |
|
Date: 2025-02-22:
| 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 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| OW |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| VODI |
0 |
0 |
0 |
1 |
7 |
3 |
0 |
0 |
| ODI |
0 |
0 |
0 |
11 |
16 |
9 |
0 |
0 |
| CDI |
0 |
0 |
0 |
4 |
29 |
62 |
16 |
0 |
| VCDI |
0 |
0 |
2 |
32 |
197 |
1626 |
14846 |
29005 |
|
|
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 |
4 |
4 |
0 |
0 |
| ODI |
0 |
0 |
0 |
12 |
17 |
8 |
0 |
0 |
| CDI |
0 |
0 |
0 |
5 |
32 |
74 |
17 |
0 |
| VCDI |
0 |
0 |
2 |
31 |
196 |
1614 |
14845 |
29005 |
|
Date: 2025-02-24:
| 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 |
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 |
2 |
2 |
0 |
1 |
| CDI |
0 |
0 |
2 |
0 |
25 |
99 |
68 |
8 |
| VCDI |
0 |
0 |
2 |
24 |
115 |
1277 |
15042 |
29198 |
|
|
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 |
0 |
0 |
23 |
80 |
43 |
0 |
| VCDI |
0 |
0 |
5 |
24 |
119 |
1293 |
15066 |
29207 |
|
Date: 2025-02-26:
| 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 |
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 |
3 |
2 |
9 |
0 |
0 |
| CDI |
0 |
0 |
0 |
1 |
21 |
60 |
7 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
93 |
1149 |
8873 |
35648 |
|
|
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 |
5 |
0 |
0 |
| CDI |
0 |
0 |
0 |
2 |
9 |
38 |
11 |
0 |
| VCDI |
0 |
0 |
0 |
2 |
106 |
1175 |
8869 |
35648 |
|
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 |
|
|
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 |
3 |
0 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
17 |
17 |
5 |
0 |
| VCDI |
0 |
0 |
0 |
47 |
176 |
1297 |
11357 |
32947 |
|
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