Validation of sea ice concentration
Bulletin date: 2023-06-22
Model vs. observations, sea ice class contingency tables
Date: 2023-06-16:
| 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 |
16025 |
5879 |
1376 |
1299 |
404 |
162 |
82 |
0 |
| OW |
0 |
6 |
113 |
277 |
362 |
208 |
47 |
0 |
| VODI |
0 |
0 |
67 |
222 |
307 |
270 |
146 |
0 |
| ODI |
0 |
0 |
33 |
96 |
123 |
306 |
369 |
0 |
| CDI |
0 |
0 |
42 |
107 |
181 |
470 |
2505 |
0 |
| VCDI |
0 |
0 |
2 |
9 |
22 |
22 |
2456 |
4164 |
|
...date precedes bulletin
|
Date: 2023-06-20:
| 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 |
16242 |
5688 |
1369 |
1617 |
492 |
126 |
99 |
0 |
| OW |
0 |
5 |
64 |
358 |
347 |
97 |
52 |
0 |
| VODI |
0 |
0 |
29 |
218 |
359 |
216 |
115 |
0 |
| ODI |
0 |
0 |
2 |
98 |
203 |
464 |
318 |
0 |
| CDI |
0 |
0 |
0 |
60 |
116 |
594 |
1817 |
0 |
| VCDI |
0 |
0 |
0 |
15 |
41 |
182 |
3552 |
3204 |
|
...date precedes bulletin
|
Date: 2023-06-22:
| 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 |
16482 |
5522 |
1433 |
1665 |
632 |
109 |
107 |
0 |
| OW |
0 |
4 |
61 |
348 |
291 |
95 |
76 |
0 |
| VODI |
0 |
0 |
52 |
204 |
332 |
211 |
164 |
0 |
| ODI |
0 |
0 |
11 |
89 |
152 |
359 |
468 |
0 |
| CDI |
0 |
0 |
3 |
62 |
149 |
433 |
1845 |
0 |
| VCDI |
0 |
0 |
0 |
21 |
45 |
83 |
3028 |
3623 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
16482 |
5523 |
1425 |
1769 |
691 |
127 |
119 |
0 |
| OW |
0 |
3 |
59 |
243 |
259 |
77 |
61 |
0 |
| VODI |
0 |
0 |
59 |
209 |
288 |
217 |
174 |
0 |
| ODI |
0 |
0 |
14 |
87 |
163 |
365 |
476 |
0 |
| CDI |
0 |
0 |
2 |
60 |
155 |
427 |
1817 |
0 |
| VCDI |
0 |
0 |
1 |
21 |
45 |
77 |
3041 |
3623 |
|
Date: 2023-06-26:
| 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 |
16848 |
5981 |
1724 |
1328 |
345 |
112 |
91 |
0 |
| OW |
0 |
0 |
77 |
276 |
179 |
74 |
39 |
0 |
| VODI |
0 |
0 |
23 |
227 |
333 |
227 |
85 |
0 |
| ODI |
0 |
0 |
8 |
87 |
254 |
572 |
438 |
0 |
| CDI |
0 |
0 |
2 |
80 |
137 |
500 |
1675 |
0 |
| VCDI |
0 |
0 |
2 |
20 |
54 |
219 |
3272 |
2870 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
16848 |
5981 |
1643 |
1438 |
465 |
124 |
113 |
0 |
| OW |
0 |
0 |
111 |
244 |
180 |
122 |
61 |
0 |
| VODI |
0 |
0 |
72 |
181 |
294 |
325 |
264 |
0 |
| ODI |
0 |
0 |
6 |
47 |
128 |
307 |
303 |
0 |
| CDI |
0 |
0 |
2 |
91 |
181 |
596 |
1604 |
0 |
| VCDI |
0 |
0 |
2 |
17 |
54 |
230 |
3255 |
2870 |
|
Date: 2023-06-28:
| 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 |
16626 |
5881 |
1831 |
1505 |
571 |
211 |
103 |
0 |
| OW |
0 |
0 |
47 |
171 |
249 |
135 |
49 |
0 |
| VODI |
0 |
0 |
9 |
85 |
288 |
426 |
168 |
0 |
| ODI |
0 |
0 |
4 |
33 |
172 |
453 |
507 |
0 |
| CDI |
0 |
0 |
4 |
84 |
156 |
346 |
1698 |
2 |
| VCDI |
0 |
0 |
2 |
9 |
25 |
45 |
2662 |
3602 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
16626 |
5881 |
1759 |
1504 |
702 |
265 |
147 |
0 |
| OW |
0 |
0 |
94 |
191 |
211 |
192 |
94 |
0 |
| VODI |
0 |
0 |
35 |
66 |
229 |
378 |
332 |
0 |
| ODI |
0 |
0 |
3 |
21 |
96 |
286 |
337 |
0 |
| CDI |
0 |
0 |
3 |
97 |
194 |
445 |
1797 |
25 |
| VCDI |
0 |
0 |
3 |
8 |
29 |
50 |
2480 |
3579 |
|
Date: 2023-06-30:
| 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 |
17440 |
5563 |
1869 |
1253 |
414 |
226 |
134 |
0 |
| OW |
0 |
0 |
63 |
244 |
193 |
194 |
66 |
0 |
| VODI |
0 |
0 |
19 |
122 |
180 |
375 |
305 |
0 |
| ODI |
0 |
0 |
7 |
52 |
99 |
333 |
534 |
0 |
| CDI |
0 |
0 |
3 |
80 |
100 |
375 |
1806 |
5 |
| VCDI |
0 |
0 |
1 |
9 |
20 |
48 |
2453 |
3574 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
17440 |
5563 |
1839 |
1306 |
466 |
305 |
182 |
0 |
| OW |
0 |
0 |
88 |
215 |
145 |
198 |
155 |
0 |
| VODI |
0 |
0 |
27 |
117 |
181 |
287 |
351 |
0 |
| ODI |
0 |
0 |
4 |
23 |
67 |
250 |
311 |
0 |
| CDI |
0 |
0 |
3 |
91 |
123 |
445 |
1889 |
13 |
| VCDI |
0 |
0 |
1 |
8 |
24 |
66 |
2410 |
3566 |
|
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