Validation of sea ice concentration - American sector
Bulletin date: 2024-04-25
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2024-04-19:
| 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 |
3 |
1 |
3 |
1 |
0 |
0 |
0 |
| VODI |
0 |
20 |
5 |
19 |
5 |
2 |
0 |
0 |
| ODI |
0 |
36 |
9 |
25 |
9 |
12 |
1 |
0 |
| CDI |
0 |
66 |
26 |
74 |
118 |
128 |
166 |
1 |
| VCDI |
0 |
105 |
62 |
251 |
519 |
2191 |
14377 |
27631 |
|
...date precedes bulletin
|
Date: 2024-04-21:
| 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 |
2 |
0 |
0 |
0 |
0 |
| OW |
0 |
6 |
0 |
9 |
2 |
0 |
0 |
0 |
| VODI |
0 |
23 |
10 |
22 |
20 |
3 |
0 |
0 |
| ODI |
0 |
22 |
17 |
20 |
21 |
8 |
0 |
0 |
| CDI |
0 |
38 |
15 |
61 |
109 |
99 |
68 |
0 |
| VCDI |
0 |
37 |
24 |
182 |
608 |
1836 |
15160 |
27444 |
|
...date precedes bulletin
|
Date: 2024-04-23:
| 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 |
1 |
2 |
0 |
0 |
| VODI |
0 |
0 |
5 |
21 |
12 |
8 |
0 |
0 |
| ODI |
0 |
1 |
5 |
18 |
20 |
20 |
0 |
0 |
| CDI |
0 |
9 |
13 |
38 |
143 |
111 |
54 |
0 |
| VCDI |
0 |
3 |
3 |
31 |
260 |
1707 |
13748 |
29633 |
|
...date precedes bulletin
|
Date: 2024-04-25:
| 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 |
2 |
2 |
0 |
0 |
0 |
| VODI |
0 |
3 |
0 |
7 |
17 |
0 |
0 |
0 |
| ODI |
0 |
3 |
2 |
15 |
21 |
6 |
3 |
0 |
| CDI |
0 |
7 |
13 |
55 |
100 |
150 |
95 |
28 |
| VCDI |
0 |
6 |
8 |
65 |
357 |
2111 |
16255 |
26535 |
|
|
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 |
1 |
2 |
0 |
0 |
0 |
| VODI |
0 |
3 |
0 |
9 |
21 |
0 |
0 |
0 |
| ODI |
0 |
3 |
4 |
14 |
22 |
7 |
3 |
1 |
| CDI |
0 |
7 |
11 |
56 |
103 |
158 |
120 |
30 |
| VCDI |
0 |
6 |
8 |
64 |
349 |
2102 |
16230 |
26532 |
|
Date: 2024-04-27:
| 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 |
2 |
0 |
0 |
0 |
| ODI |
0 |
0 |
2 |
14 |
34 |
19 |
9 |
0 |
| CDI |
0 |
12 |
14 |
96 |
207 |
195 |
153 |
12 |
| VCDI |
0 |
4 |
7 |
58 |
792 |
3570 |
16118 |
24548 |
|
|
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 |
0 |
0 |
0 |
| ODI |
0 |
1 |
2 |
17 |
34 |
21 |
12 |
0 |
| CDI |
0 |
11 |
18 |
107 |
251 |
269 |
179 |
15 |
| VCDI |
0 |
4 |
3 |
44 |
747 |
3494 |
16089 |
24545 |
|
Date: 2024-04-29:
| 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 |
6 |
0 |
4 |
12 |
1 |
0 |
0 |
| ODI |
0 |
7 |
1 |
24 |
48 |
17 |
23 |
0 |
| CDI |
0 |
11 |
10 |
56 |
378 |
286 |
225 |
3 |
| VCDI |
0 |
1 |
2 |
46 |
401 |
2482 |
16569 |
25253 |
|
|
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 |
2 |
7 |
3 |
2 |
0 |
| ODI |
0 |
0 |
0 |
9 |
34 |
23 |
28 |
0 |
| CDI |
0 |
17 |
5 |
48 |
226 |
214 |
336 |
3 |
| VCDI |
0 |
8 |
8 |
71 |
572 |
2546 |
16451 |
25253 |
|
Date: 2024-05-01:
| 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 |
2 |
0 |
| VODI |
0 |
4 |
0 |
1 |
6 |
11 |
21 |
0 |
| ODI |
0 |
6 |
5 |
14 |
32 |
44 |
52 |
0 |
| CDI |
0 |
25 |
14 |
79 |
263 |
310 |
430 |
0 |
| VCDI |
0 |
0 |
3 |
45 |
581 |
2382 |
14577 |
26959 |
|
|
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 |
1 |
0 |
| VODI |
0 |
0 |
0 |
0 |
5 |
6 |
11 |
0 |
| ODI |
0 |
0 |
0 |
5 |
36 |
48 |
49 |
0 |
| CDI |
0 |
11 |
10 |
51 |
201 |
267 |
463 |
5 |
| VCDI |
0 |
24 |
12 |
83 |
640 |
2426 |
14558 |
26954 |
|
Date: 2024-05-03:
| 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 |
1 |
1 |
1 |
1 |
2 |
0 |
| VODI |
0 |
5 |
3 |
10 |
31 |
12 |
12 |
0 |
| ODI |
0 |
28 |
4 |
15 |
51 |
41 |
27 |
0 |
| CDI |
0 |
86 |
17 |
96 |
319 |
510 |
481 |
0 |
| VCDI |
0 |
81 |
30 |
141 |
553 |
2353 |
15709 |
25245 |
|
|
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 |
1 |
2 |
0 |
1 |
0 |
0 |
| VODI |
0 |
9 |
3 |
13 |
16 |
14 |
3 |
0 |
| ODI |
0 |
17 |
4 |
23 |
44 |
45 |
26 |
1 |
| CDI |
0 |
59 |
10 |
83 |
209 |
424 |
520 |
34 |
| VCDI |
0 |
115 |
37 |
142 |
686 |
2433 |
15682 |
25210 |
|
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