Validation of sea ice concentration - American sector
Bulletin date: 2023-07-27
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2023-07-21:
| 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 |
8863 |
5904 |
330 |
391 |
90 |
32 |
0 |
0 |
| OW |
0 |
318 |
211 |
616 |
216 |
17 |
0 |
0 |
| VODI |
0 |
98 |
117 |
1569 |
1487 |
63 |
4 |
0 |
| ODI |
0 |
2 |
13 |
1036 |
7885 |
482 |
17 |
0 |
| CDI |
0 |
2 |
0 |
47 |
4341 |
8079 |
127 |
0 |
| VCDI |
0 |
4 |
0 |
0 |
60 |
3400 |
45 |
0 |
|
...date precedes bulletin
|
Date: 2023-07-23:
| 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 |
7244 |
7827 |
407 |
413 |
104 |
25 |
5 |
0 |
| OW |
0 |
370 |
232 |
720 |
274 |
38 |
0 |
0 |
| VODI |
0 |
127 |
190 |
1972 |
1891 |
142 |
7 |
0 |
| ODI |
0 |
7 |
10 |
933 |
6474 |
1124 |
10 |
0 |
| CDI |
0 |
0 |
0 |
42 |
1527 |
11725 |
0 |
0 |
| VCDI |
0 |
4 |
0 |
0 |
25 |
1968 |
29 |
0 |
|
...date precedes bulletin
|
Date: 2023-07-25:
| 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 |
8084 |
7504 |
533 |
488 |
102 |
33 |
1 |
0 |
| OW |
0 |
313 |
256 |
582 |
194 |
35 |
0 |
0 |
| VODI |
0 |
86 |
202 |
2951 |
1687 |
53 |
4 |
0 |
| ODI |
0 |
4 |
5 |
505 |
7114 |
771 |
8 |
0 |
| CDI |
0 |
0 |
0 |
4 |
2273 |
11110 |
216 |
0 |
| VCDI |
0 |
4 |
0 |
2 |
7 |
735 |
0 |
0 |
|
...date precedes bulletin
|
Date: 2023-07-27:
| 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 |
8961 |
7236 |
513 |
464 |
140 |
24 |
0 |
0 |
| OW |
0 |
382 |
403 |
909 |
235 |
29 |
1 |
0 |
| VODI |
0 |
90 |
151 |
3445 |
1731 |
47 |
5 |
0 |
| ODI |
0 |
0 |
0 |
478 |
6451 |
573 |
3 |
0 |
| CDI |
0 |
0 |
0 |
5 |
2540 |
8365 |
1048 |
0 |
| VCDI |
0 |
4 |
0 |
2 |
24 |
915 |
692 |
0 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
8961 |
7254 |
519 |
543 |
172 |
30 |
0 |
0 |
| OW |
0 |
359 |
341 |
716 |
215 |
20 |
2 |
0 |
| VODI |
0 |
95 |
207 |
3464 |
1762 |
54 |
4 |
0 |
| ODI |
0 |
0 |
0 |
573 |
6334 |
542 |
3 |
0 |
| CDI |
0 |
0 |
0 |
5 |
2620 |
8562 |
1150 |
0 |
| VCDI |
0 |
4 |
0 |
2 |
18 |
745 |
590 |
0 |
|
Date: 2023-07-29:
| 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 |
9071 |
7638 |
515 |
494 |
144 |
36 |
3 |
0 |
| OW |
0 |
498 |
438 |
1408 |
273 |
33 |
4 |
0 |
| VODI |
0 |
67 |
104 |
3041 |
2312 |
60 |
2 |
0 |
| ODI |
0 |
2 |
2 |
247 |
5126 |
1406 |
2 |
0 |
| CDI |
0 |
0 |
0 |
8 |
1760 |
6775 |
2174 |
0 |
| VCDI |
0 |
4 |
1 |
2 |
20 |
1615 |
566 |
15 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
9071 |
7656 |
522 |
567 |
198 |
41 |
2 |
0 |
| OW |
0 |
430 |
344 |
1073 |
213 |
27 |
5 |
0 |
| VODI |
0 |
118 |
188 |
3238 |
2290 |
52 |
2 |
0 |
| ODI |
0 |
1 |
5 |
312 |
4935 |
1401 |
2 |
0 |
| CDI |
0 |
0 |
0 |
8 |
1980 |
7117 |
2230 |
0 |
| VCDI |
0 |
4 |
1 |
2 |
19 |
1287 |
510 |
15 |
|
Date: 2023-07-31:
| 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 |
9155 |
8446 |
498 |
480 |
93 |
18 |
0 |
0 |
| OW |
0 |
304 |
323 |
730 |
112 |
17 |
0 |
0 |
| VODI |
0 |
76 |
250 |
3618 |
763 |
35 |
0 |
0 |
| ODI |
0 |
2 |
3 |
779 |
6656 |
90 |
2 |
0 |
| CDI |
0 |
0 |
3 |
11 |
1499 |
5105 |
14 |
0 |
| VCDI |
0 |
5 |
0 |
2 |
10 |
2468 |
4286 |
13 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
9155 |
8270 |
518 |
762 |
138 |
23 |
0 |
0 |
| OW |
0 |
460 |
400 |
1758 |
321 |
32 |
0 |
0 |
| VODI |
0 |
94 |
149 |
2851 |
2086 |
42 |
0 |
0 |
| ODI |
0 |
4 |
7 |
225 |
4191 |
1374 |
6 |
0 |
| CDI |
0 |
0 |
3 |
21 |
2316 |
5507 |
2877 |
0 |
| VCDI |
0 |
5 |
0 |
3 |
81 |
755 |
1419 |
13 |
|
Date: 2023-08-02:
| 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 |
9232 |
8933 |
589 |
689 |
133 |
1 |
0 |
0 |
| OW |
0 |
299 |
339 |
1090 |
143 |
11 |
0 |
0 |
| VODI |
0 |
83 |
195 |
3266 |
1405 |
17 |
0 |
0 |
| ODI |
0 |
4 |
0 |
585 |
4869 |
583 |
18 |
0 |
| CDI |
0 |
7 |
7 |
11 |
1802 |
3557 |
1148 |
0 |
| VCDI |
0 |
4 |
0 |
10 |
50 |
342 |
4820 |
1624 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
9232 |
8712 |
618 |
1076 |
193 |
3 |
0 |
0 |
| OW |
0 |
528 |
374 |
2058 |
439 |
19 |
0 |
0 |
| VODI |
0 |
73 |
127 |
2186 |
2040 |
42 |
4 |
0 |
| ODI |
0 |
6 |
2 |
300 |
3908 |
1079 |
65 |
0 |
| CDI |
0 |
7 |
9 |
27 |
1749 |
3272 |
5148 |
358 |
| VCDI |
0 |
4 |
0 |
4 |
73 |
96 |
769 |
1266 |
|
Date: 2023-08-04:
| 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 |
9714 |
8961 |
527 |
694 |
101 |
1 |
0 |
0 |
| OW |
0 |
409 |
391 |
1198 |
142 |
23 |
1 |
0 |
| VODI |
0 |
85 |
168 |
3276 |
1479 |
44 |
2 |
0 |
| ODI |
0 |
2 |
1 |
278 |
4502 |
553 |
13 |
0 |
| CDI |
0 |
11 |
9 |
17 |
1390 |
3855 |
1548 |
0 |
| VCDI |
0 |
3 |
1 |
4 |
30 |
2027 |
4174 |
232 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
9714 |
8808 |
603 |
1392 |
201 |
28 |
0 |
0 |
| OW |
0 |
564 |
390 |
2045 |
406 |
30 |
3 |
0 |
| VODI |
0 |
81 |
89 |
1815 |
1967 |
82 |
0 |
0 |
| ODI |
0 |
3 |
3 |
184 |
3533 |
1266 |
245 |
0 |
| CDI |
0 |
12 |
11 |
27 |
1521 |
4775 |
4004 |
0 |
| VCDI |
0 |
3 |
1 |
4 |
16 |
322 |
1486 |
232 |
|
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