Validation of sea ice concentration
Bulletin date: 2023-06-29
Model vs. observations, sea ice class contingency tables
Date: 2023-06-23:
| 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 |
16493 |
5613 |
1409 |
1633 |
704 |
131 |
105 |
0 |
| OW |
0 |
3 |
58 |
314 |
272 |
115 |
76 |
0 |
| VODI |
0 |
0 |
45 |
206 |
308 |
251 |
201 |
0 |
| ODI |
0 |
0 |
12 |
59 |
163 |
309 |
500 |
0 |
| CDI |
0 |
0 |
4 |
65 |
148 |
446 |
1845 |
0 |
| VCDI |
0 |
0 |
0 |
21 |
45 |
75 |
2954 |
3576 |
|
...date precedes bulletin
|
Date: 2023-06-27:
| 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 |
16817 |
5849 |
1495 |
1737 |
500 |
124 |
101 |
0 |
| OW |
0 |
0 |
48 |
253 |
194 |
99 |
51 |
0 |
| VODI |
0 |
0 |
14 |
173 |
326 |
236 |
173 |
0 |
| ODI |
0 |
0 |
6 |
79 |
230 |
432 |
508 |
0 |
| CDI |
0 |
0 |
2 |
91 |
152 |
345 |
1651 |
1 |
| VCDI |
0 |
0 |
3 |
10 |
31 |
163 |
3059 |
3206 |
|
...date precedes bulletin
|
Date: 2023-06-29:
| 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 |
17171 |
5610 |
1884 |
1276 |
580 |
175 |
110 |
0 |
| OW |
0 |
0 |
51 |
168 |
284 |
159 |
59 |
0 |
| VODI |
0 |
0 |
13 |
71 |
244 |
402 |
252 |
0 |
| ODI |
0 |
0 |
4 |
33 |
145 |
362 |
580 |
0 |
| CDI |
0 |
0 |
6 |
77 |
125 |
349 |
1747 |
0 |
| VCDI |
0 |
0 |
1 |
8 |
21 |
37 |
2585 |
3570 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
17171 |
5610 |
1895 |
1302 |
631 |
206 |
116 |
0 |
| OW |
0 |
0 |
43 |
143 |
227 |
148 |
62 |
0 |
| VODI |
0 |
0 |
11 |
73 |
243 |
384 |
250 |
0 |
| ODI |
0 |
0 |
3 |
32 |
149 |
360 |
580 |
0 |
| CDI |
0 |
0 |
4 |
73 |
124 |
348 |
1717 |
0 |
| VCDI |
0 |
0 |
3 |
10 |
25 |
38 |
2608 |
3570 |
|
Date: 2023-07-03:
| 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 |
17795 |
5485 |
2062 |
1024 |
506 |
128 |
122 |
0 |
| OW |
0 |
0 |
55 |
182 |
207 |
86 |
45 |
0 |
| VODI |
0 |
0 |
17 |
186 |
321 |
344 |
160 |
0 |
| ODI |
0 |
0 |
2 |
51 |
243 |
517 |
687 |
0 |
| CDI |
0 |
0 |
3 |
42 |
125 |
253 |
2211 |
62 |
| VCDI |
0 |
0 |
0 |
9 |
35 |
65 |
2157 |
2972 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
17795 |
5485 |
2052 |
1041 |
614 |
201 |
165 |
0 |
| OW |
0 |
0 |
47 |
171 |
190 |
164 |
94 |
0 |
| VODI |
0 |
0 |
27 |
156 |
256 |
309 |
201 |
0 |
| ODI |
0 |
0 |
8 |
51 |
150 |
287 |
394 |
0 |
| CDI |
0 |
0 |
3 |
66 |
190 |
346 |
1953 |
0 |
| VCDI |
0 |
0 |
2 |
9 |
37 |
86 |
2575 |
3034 |
|
Date: 2023-07-05:
| 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 |
18075 |
5599 |
1858 |
1135 |
457 |
105 |
119 |
0 |
| OW |
0 |
0 |
50 |
246 |
194 |
112 |
55 |
0 |
| VODI |
0 |
0 |
9 |
234 |
354 |
343 |
201 |
0 |
| ODI |
0 |
0 |
2 |
54 |
205 |
359 |
528 |
0 |
| CDI |
0 |
0 |
2 |
40 |
177 |
271 |
1953 |
21 |
| VCDI |
0 |
0 |
0 |
13 |
29 |
108 |
2279 |
2972 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
18075 |
5592 |
1801 |
1085 |
578 |
185 |
187 |
0 |
| OW |
0 |
5 |
73 |
273 |
175 |
115 |
75 |
0 |
| VODI |
0 |
2 |
39 |
225 |
224 |
241 |
193 |
0 |
| ODI |
0 |
0 |
6 |
60 |
152 |
275 |
337 |
0 |
| CDI |
0 |
0 |
1 |
63 |
249 |
327 |
1591 |
0 |
| VCDI |
0 |
0 |
1 |
16 |
38 |
155 |
2752 |
2993 |
|
Date: 2023-07-07:
| 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 |
18521 |
5736 |
1861 |
1067 |
127 |
81 |
95 |
0 |
| OW |
0 |
5 |
57 |
458 |
127 |
75 |
70 |
0 |
| VODI |
0 |
0 |
21 |
540 |
260 |
152 |
111 |
0 |
| ODI |
0 |
0 |
8 |
146 |
227 |
269 |
288 |
0 |
| CDI |
0 |
0 |
1 |
164 |
204 |
369 |
1789 |
30 |
| VCDI |
0 |
0 |
1 |
21 |
39 |
151 |
2307 |
2781 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
18521 |
5712 |
1756 |
1184 |
220 |
137 |
124 |
0 |
| OW |
0 |
18 |
125 |
406 |
90 |
55 |
64 |
0 |
| VODI |
0 |
7 |
48 |
397 |
166 |
103 |
108 |
0 |
| ODI |
0 |
4 |
10 |
149 |
173 |
189 |
251 |
0 |
| CDI |
0 |
0 |
9 |
236 |
290 |
421 |
1515 |
0 |
| VCDI |
0 |
0 |
1 |
24 |
45 |
192 |
2598 |
2811 |
|
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