Validation of sea ice concentration - American sector
Bulletin date: 2025-03-20
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
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 |
|
...date precedes bulletin
|
Date: 2025-03-16:
| 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 |
0 |
0 |
1 |
0 |
0 |
| ODI |
0 |
0 |
0 |
0 |
3 |
14 |
3 |
0 |
| CDI |
0 |
4 |
0 |
1 |
19 |
88 |
89 |
0 |
| VCDI |
0 |
38 |
29 |
214 |
585 |
2749 |
16530 |
25499 |
|
...date precedes bulletin
|
Date: 2025-03-18:
| 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 |
0 |
8 |
1 |
1 |
0 |
| ODI |
0 |
0 |
0 |
0 |
25 |
19 |
3 |
0 |
| CDI |
0 |
0 |
0 |
0 |
41 |
161 |
47 |
0 |
| VCDI |
0 |
8 |
8 |
15 |
185 |
3299 |
16554 |
25491 |
|
...date precedes bulletin
|
Date: 2025-03-20:
| 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 |
0 |
0 |
0 |
0 |
10 |
7 |
0 |
| ODI |
0 |
2 |
2 |
1 |
7 |
22 |
11 |
0 |
| CDI |
0 |
5 |
1 |
3 |
40 |
153 |
99 |
0 |
| VCDI |
0 |
15 |
12 |
37 |
220 |
2868 |
16341 |
26010 |
|
|
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 |
11 |
7 |
0 |
| ODI |
0 |
2 |
2 |
2 |
6 |
24 |
13 |
0 |
| CDI |
0 |
9 |
2 |
2 |
39 |
158 |
100 |
2 |
| VCDI |
0 |
11 |
11 |
37 |
222 |
2860 |
16338 |
26008 |
|
Date: 2025-03-22:
| 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 |
0 |
0 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
0 |
0 |
19 |
1 |
0 |
| CDI |
0 |
5 |
2 |
2 |
2 |
78 |
131 |
0 |
| VCDI |
0 |
12 |
12 |
25 |
109 |
2637 |
15578 |
27253 |
|
|
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 |
1 |
1 |
0 |
0 |
19 |
1 |
0 |
| CDI |
0 |
5 |
3 |
4 |
4 |
87 |
145 |
2 |
| VCDI |
0 |
11 |
10 |
23 |
107 |
2627 |
15564 |
27251 |
|
Date: 2025-03-24:
| 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 |
1 |
0 |
0 |
0 |
| ODI |
0 |
0 |
2 |
2 |
3 |
21 |
0 |
0 |
| CDI |
0 |
0 |
4 |
4 |
10 |
56 |
50 |
7 |
| VCDI |
0 |
0 |
3 |
17 |
36 |
1629 |
13866 |
30155 |
|
|
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 |
0 |
0 |
0 |
| ODI |
0 |
0 |
0 |
0 |
1 |
17 |
1 |
0 |
| CDI |
0 |
0 |
0 |
1 |
2 |
40 |
75 |
9 |
| VCDI |
0 |
0 |
9 |
22 |
46 |
1649 |
13840 |
30153 |
|
Date: 2025-03-26:
| 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 |
1 |
2 |
0 |
0 |
| ODI |
0 |
0 |
0 |
0 |
6 |
19 |
2 |
0 |
| CDI |
0 |
1 |
3 |
3 |
10 |
42 |
49 |
12 |
| VCDI |
0 |
2 |
4 |
22 |
47 |
1056 |
11715 |
32870 |
|
|
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 |
3 |
0 |
0 |
| ODI |
0 |
0 |
0 |
0 |
5 |
16 |
0 |
0 |
| CDI |
0 |
0 |
0 |
0 |
8 |
31 |
40 |
26 |
| VCDI |
0 |
3 |
7 |
25 |
50 |
1069 |
11726 |
32856 |
|
Date: 2025-03-28:
| 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 |
2 |
0 |
0 |
| ODI |
0 |
0 |
0 |
0 |
0 |
23 |
1 |
0 |
| CDI |
0 |
0 |
2 |
7 |
5 |
59 |
68 |
7 |
| VCDI |
0 |
0 |
0 |
25 |
42 |
1488 |
13176 |
30961 |
|
|
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 |
3 |
0 |
0 |
| ODI |
0 |
0 |
0 |
0 |
0 |
17 |
1 |
1 |
| CDI |
0 |
0 |
1 |
5 |
7 |
61 |
58 |
23 |
| VCDI |
0 |
0 |
1 |
27 |
40 |
1491 |
13186 |
30944 |
|
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