Validation of sea ice concentration
Bulletin date: 2023-07-06
Model vs. observations, sea ice class contingency tables
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 |
|
...date precedes bulletin
|
Date: 2023-07-04:
| 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 |
17796 |
5583 |
2017 |
1094 |
558 |
109 |
118 |
0 |
| OW |
0 |
0 |
43 |
184 |
225 |
89 |
50 |
0 |
| VODI |
0 |
0 |
10 |
196 |
352 |
348 |
182 |
0 |
| ODI |
0 |
0 |
4 |
45 |
158 |
540 |
588 |
0 |
| CDI |
0 |
0 |
2 |
41 |
161 |
273 |
2073 |
28 |
| VCDI |
0 |
0 |
0 |
10 |
28 |
84 |
2185 |
2985 |
|
...date precedes bulletin
|
Date: 2023-07-06:
| 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 |
18422 |
5620 |
1642 |
1189 |
332 |
109 |
114 |
0 |
| OW |
0 |
3 |
50 |
323 |
172 |
83 |
78 |
0 |
| VODI |
0 |
0 |
16 |
406 |
325 |
201 |
196 |
0 |
| ODI |
0 |
0 |
7 |
99 |
249 |
260 |
377 |
0 |
| CDI |
0 |
0 |
1 |
128 |
175 |
282 |
1828 |
25 |
| VCDI |
0 |
0 |
0 |
21 |
46 |
116 |
2334 |
2930 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
18422 |
5622 |
1646 |
1202 |
346 |
121 |
123 |
0 |
| OW |
0 |
1 |
46 |
311 |
152 |
70 |
77 |
0 |
| VODI |
0 |
0 |
16 |
404 |
326 |
196 |
182 |
0 |
| ODI |
0 |
0 |
6 |
103 |
242 |
248 |
370 |
0 |
| CDI |
0 |
0 |
2 |
125 |
186 |
299 |
1865 |
38 |
| VCDI |
0 |
0 |
0 |
21 |
47 |
117 |
2310 |
2917 |
|
Date: 2023-07-10:
| 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 |
18387 |
6367 |
1784 |
1089 |
154 |
65 |
118 |
0 |
| OW |
0 |
2 |
63 |
349 |
75 |
43 |
40 |
0 |
| VODI |
0 |
0 |
33 |
383 |
217 |
205 |
65 |
0 |
| ODI |
0 |
0 |
10 |
231 |
321 |
632 |
147 |
0 |
| CDI |
0 |
0 |
6 |
72 |
137 |
559 |
1957 |
1381 |
| VCDI |
0 |
0 |
1 |
12 |
22 |
153 |
1998 |
1081 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
18387 |
6362 |
1663 |
1075 |
161 |
80 |
127 |
0 |
| OW |
0 |
6 |
134 |
439 |
114 |
75 |
48 |
0 |
| VODI |
0 |
1 |
62 |
333 |
225 |
258 |
55 |
0 |
| ODI |
0 |
0 |
25 |
87 |
196 |
422 |
104 |
0 |
| CDI |
0 |
0 |
13 |
188 |
172 |
567 |
1592 |
4 |
| VCDI |
0 |
0 |
0 |
14 |
58 |
255 |
2399 |
2458 |
|
Date: 2023-07-12:
| 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 |
18937 |
6526 |
1255 |
1119 |
228 |
57 |
93 |
0 |
| OW |
0 |
10 |
60 |
221 |
136 |
49 |
49 |
0 |
| VODI |
0 |
3 |
51 |
226 |
303 |
295 |
49 |
0 |
| ODI |
0 |
0 |
13 |
117 |
305 |
461 |
184 |
0 |
| CDI |
0 |
0 |
1 |
79 |
127 |
412 |
1978 |
1348 |
| VCDI |
0 |
0 |
2 |
9 |
28 |
287 |
2094 |
1047 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
18937 |
6492 |
1153 |
1059 |
267 |
63 |
96 |
0 |
| OW |
0 |
38 |
127 |
251 |
190 |
109 |
41 |
0 |
| VODI |
0 |
7 |
59 |
202 |
248 |
285 |
51 |
0 |
| ODI |
0 |
2 |
22 |
84 |
179 |
340 |
123 |
0 |
| CDI |
0 |
0 |
19 |
163 |
207 |
447 |
1543 |
71 |
| VCDI |
0 |
0 |
2 |
12 |
36 |
317 |
2593 |
2324 |
|
Date: 2023-07-14:
| 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 |
19200 |
6577 |
1200 |
917 |
252 |
97 |
75 |
0 |
| OW |
0 |
17 |
58 |
275 |
167 |
62 |
17 |
0 |
| VODI |
0 |
2 |
47 |
194 |
386 |
227 |
57 |
0 |
| ODI |
0 |
0 |
17 |
97 |
269 |
308 |
242 |
0 |
| CDI |
0 |
0 |
0 |
63 |
174 |
363 |
1902 |
1372 |
| VCDI |
0 |
0 |
1 |
14 |
32 |
284 |
2157 |
1037 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
19200 |
6529 |
1114 |
926 |
302 |
110 |
75 |
0 |
| OW |
0 |
55 |
109 |
259 |
204 |
90 |
14 |
0 |
| VODI |
0 |
9 |
64 |
152 |
258 |
191 |
58 |
0 |
| ODI |
0 |
3 |
23 |
106 |
193 |
216 |
169 |
0 |
| CDI |
0 |
0 |
12 |
104 |
288 |
444 |
1662 |
173 |
| VCDI |
0 |
0 |
1 |
13 |
35 |
290 |
2472 |
2236 |
|
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