Validation of sea ice concentration - American sector
Bulletin date: 2023-12-07
Data source: OSI SAF N.H. AMSR sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2023-12-01:
| 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 |
2471 |
4921 |
334 |
456 |
63 |
21 |
8 |
0 |
| OW |
77 |
609 |
170 |
434 |
159 |
30 |
2 |
0 |
| VODI |
0 |
156 |
59 |
220 |
250 |
149 |
35 |
0 |
| ODI |
0 |
54 |
24 |
105 |
214 |
286 |
52 |
0 |
| CDI |
0 |
7 |
11 |
70 |
201 |
701 |
143 |
7 |
| VCDI |
0 |
0 |
0 |
17 |
292 |
2718 |
13908 |
16432 |
|
...date precedes bulletin
|
Date: 2023-12-03:
| 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 |
1460 |
4274 |
254 |
541 |
78 |
18 |
8 |
0 |
| OW |
37 |
1386 |
220 |
635 |
203 |
32 |
2 |
0 |
| VODI |
4 |
276 |
66 |
251 |
276 |
208 |
7 |
0 |
| ODI |
0 |
71 |
27 |
149 |
237 |
283 |
12 |
0 |
| CDI |
0 |
22 |
26 |
69 |
206 |
705 |
211 |
0 |
| VCDI |
0 |
0 |
5 |
51 |
409 |
2756 |
14484 |
15907 |
|
...date precedes bulletin
|
Date: 2023-12-05:
| 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 |
1722 |
5456 |
399 |
702 |
81 |
3 |
0 |
16 |
| OW |
26 |
295 |
110 |
360 |
95 |
29 |
0 |
8 |
| VODI |
5 |
81 |
61 |
257 |
308 |
102 |
10 |
7 |
| ODI |
0 |
19 |
18 |
108 |
323 |
247 |
33 |
2 |
| CDI |
0 |
3 |
2 |
43 |
212 |
640 |
188 |
0 |
| VCDI |
0 |
1 |
0 |
28 |
139 |
1928 |
14507 |
17292 |
|
...date precedes bulletin
|
Date: 2023-12-07:
| 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 |
1583 |
5127 |
307 |
465 |
60 |
5 |
0 |
13 |
| OW |
8 |
606 |
124 |
366 |
124 |
10 |
2 |
8 |
| VODI |
0 |
319 |
99 |
291 |
252 |
63 |
7 |
4 |
| ODI |
0 |
87 |
41 |
226 |
252 |
153 |
17 |
0 |
| CDI |
0 |
9 |
5 |
49 |
281 |
510 |
69 |
0 |
| VCDI |
0 |
1 |
3 |
13 |
140 |
2131 |
13058 |
18978 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
1583 |
5042 |
291 |
549 |
74 |
3 |
0 |
14 |
| OW |
8 |
682 |
129 |
244 |
101 |
3 |
1 |
6 |
| VODI |
0 |
281 |
90 |
251 |
243 |
73 |
4 |
5 |
| ODI |
0 |
129 |
57 |
267 |
228 |
145 |
14 |
0 |
| CDI |
0 |
12 |
9 |
85 |
301 |
439 |
75 |
0 |
| VCDI |
0 |
3 |
3 |
14 |
162 |
2209 |
13059 |
18978 |
|
Date: 2023-12-09:
| 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 |
1060 |
4169 |
235 |
390 |
121 |
0 |
0 |
7 |
| OW |
23 |
843 |
118 |
488 |
481 |
20 |
1 |
13 |
| VODI |
40 |
492 |
142 |
337 |
305 |
217 |
4 |
3 |
| ODI |
12 |
83 |
16 |
151 |
157 |
315 |
8 |
2 |
| CDI |
0 |
7 |
5 |
28 |
144 |
648 |
64 |
0 |
| VCDI |
0 |
3 |
4 |
18 |
92 |
1776 |
11319 |
21505 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
1070 |
4307 |
218 |
411 |
301 |
0 |
0 |
8 |
| OW |
16 |
655 |
107 |
389 |
261 |
34 |
0 |
11 |
| VODI |
31 |
461 |
146 |
364 |
262 |
175 |
3 |
4 |
| ODI |
18 |
164 |
39 |
158 |
195 |
284 |
4 |
2 |
| CDI |
0 |
10 |
6 |
72 |
190 |
595 |
66 |
0 |
| VCDI |
0 |
0 |
4 |
18 |
91 |
1888 |
11323 |
21505 |
|
Date: 2023-12-11:
| 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 |
812 |
3719 |
203 |
267 |
13 |
0 |
0 |
0 |
| OW |
21 |
505 |
152 |
325 |
102 |
1 |
0 |
0 |
| VODI |
3 |
154 |
101 |
478 |
429 |
27 |
0 |
0 |
| ODI |
0 |
8 |
9 |
144 |
1034 |
319 |
6 |
0 |
| CDI |
0 |
0 |
0 |
5 |
295 |
1215 |
197 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
68 |
1460 |
8926 |
24868 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
829 |
3212 |
202 |
399 |
77 |
8 |
2 |
0 |
| OW |
7 |
633 |
103 |
268 |
359 |
44 |
5 |
0 |
| VODI |
0 |
382 |
103 |
363 |
738 |
285 |
21 |
0 |
| ODI |
0 |
123 |
41 |
119 |
408 |
301 |
47 |
0 |
| CDI |
0 |
36 |
16 |
56 |
234 |
667 |
146 |
0 |
| VCDI |
0 |
0 |
0 |
14 |
125 |
1717 |
8908 |
24868 |
|
Date: 2023-12-13:
| 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 |
457 |
2778 |
189 |
336 |
110 |
14 |
0 |
0 |
| OW |
0 |
451 |
83 |
286 |
281 |
65 |
0 |
0 |
| VODI |
0 |
287 |
79 |
236 |
465 |
127 |
0 |
0 |
| ODI |
0 |
68 |
38 |
183 |
333 |
322 |
0 |
0 |
| CDI |
0 |
10 |
10 |
76 |
312 |
1153 |
48 |
2 |
| VCDI |
0 |
0 |
1 |
48 |
356 |
2572 |
10011 |
24079 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
457 |
2634 |
132 |
247 |
228 |
50 |
0 |
0 |
| OW |
0 |
447 |
101 |
307 |
253 |
89 |
0 |
2 |
| VODI |
0 |
350 |
96 |
287 |
462 |
500 |
5 |
17 |
| ODI |
0 |
142 |
44 |
164 |
307 |
648 |
21 |
3 |
| CDI |
0 |
20 |
26 |
92 |
213 |
575 |
86 |
3 |
| VCDI |
0 |
1 |
1 |
68 |
394 |
2391 |
9947 |
24056 |
|
Date: 2023-12-15:
| 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 |
319 |
2206 |
193 |
331 |
223 |
13 |
0 |
0 |
| OW |
0 |
406 |
147 |
223 |
363 |
71 |
0 |
0 |
| VODI |
0 |
184 |
76 |
201 |
466 |
243 |
1 |
0 |
| ODI |
0 |
36 |
26 |
112 |
324 |
313 |
3 |
0 |
| CDI |
0 |
73 |
17 |
73 |
307 |
731 |
50 |
0 |
| VCDI |
0 |
25 |
16 |
77 |
558 |
3142 |
8246 |
26071 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
301 |
1986 |
138 |
187 |
274 |
57 |
0 |
0 |
| OW |
18 |
458 |
79 |
193 |
321 |
102 |
0 |
0 |
| VODI |
0 |
310 |
134 |
242 |
381 |
367 |
6 |
15 |
| ODI |
0 |
69 |
82 |
144 |
344 |
598 |
11 |
7 |
| CDI |
0 |
83 |
29 |
157 |
358 |
650 |
50 |
5 |
| VCDI |
0 |
24 |
13 |
94 |
563 |
2739 |
8233 |
26044 |
|
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