Validation of sea ice concentration - American sector
Bulletin date: 2025-03-13
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-03-07:
| 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 |
0 |
1 |
4 |
10 |
77 |
79 |
10 |
| VCDI |
0 |
0 |
5 |
30 |
68 |
1620 |
14319 |
29632 |
|
...date precedes bulletin
|
Date: 2025-03-09:
| 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 |
0 |
0 |
5 |
0 |
0 |
0 |
| ODI |
0 |
1 |
1 |
7 |
9 |
15 |
7 |
0 |
| CDI |
0 |
3 |
2 |
11 |
14 |
52 |
62 |
1 |
| VCDI |
0 |
16 |
20 |
78 |
110 |
1169 |
12642 |
31640 |
|
...date precedes bulletin
|
Date: 2025-03-11:
| 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 |
4 |
4 |
1 |
3 |
5 |
12 |
0 |
| CDI |
0 |
6 |
3 |
6 |
32 |
96 |
123 |
1 |
| VCDI |
0 |
13 |
19 |
56 |
133 |
889 |
12800 |
31660 |
|
...date precedes bulletin
|
Date: 2025-03-13:
| 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 |
1 |
0 |
0 |
0 |
0 |
5 |
0 |
| CDI |
0 |
6 |
1 |
1 |
8 |
53 |
84 |
19 |
| VCDI |
0 |
8 |
10 |
30 |
117 |
1775 |
11041 |
32707 |
|
|
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 |
1 |
0 |
0 |
0 |
0 |
1 |
0 |
| CDI |
0 |
6 |
3 |
1 |
7 |
64 |
96 |
23 |
| VCDI |
0 |
8 |
8 |
30 |
118 |
1764 |
11033 |
32703 |
|
Date: 2025-03-15:
| 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 |
1 |
6 |
14 |
0 |
| CDI |
0 |
3 |
2 |
0 |
16 |
64 |
50 |
6 |
| VCDI |
0 |
14 |
9 |
29 |
188 |
2255 |
17923 |
25283 |
|
|
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 |
0 |
0 |
1 |
7 |
10 |
0 |
| CDI |
0 |
4 |
1 |
0 |
18 |
76 |
63 |
5 |
| VCDI |
0 |
14 |
10 |
29 |
186 |
2242 |
17914 |
25284 |
|
Date: 2025-03-17:
| 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 |
5 |
7 |
28 |
2 |
0 |
| CDI |
0 |
2 |
2 |
3 |
34 |
153 |
61 |
14 |
| VCDI |
0 |
4 |
3 |
17 |
189 |
3328 |
15898 |
26115 |
|
|
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 |
2 |
6 |
11 |
3 |
0 |
| CDI |
0 |
0 |
0 |
0 |
19 |
128 |
108 |
2 |
| VCDI |
0 |
6 |
6 |
23 |
205 |
3370 |
15850 |
26127 |
|
Date: 2025-03-19:
| 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 |
3 |
15 |
5 |
0 |
| ODI |
0 |
2 |
0 |
0 |
18 |
26 |
7 |
0 |
| CDI |
0 |
3 |
2 |
1 |
58 |
161 |
68 |
0 |
| VCDI |
0 |
9 |
7 |
37 |
227 |
3231 |
16751 |
25235 |
|
|
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 |
12 |
0 |
1 |
0 |
| CDI |
0 |
3 |
0 |
1 |
33 |
125 |
130 |
0 |
| VCDI |
0 |
11 |
9 |
37 |
261 |
3308 |
16700 |
25235 |
|
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 |
|
|
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 |
2 |
1 |
1 |
9 |
104 |
194 |
0 |
| VCDI |
0 |
17 |
13 |
30 |
140 |
2826 |
16131 |
26392 |
|
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