Description of algorithm
Full domain
  Ice concntr, edge pos
  Contingency tables
American sector
European sector
Asian sector

Validation of sea ice concentration - Full domain

Bulletin date: 2025-01-23

Data source: OSI SAF N.H. AMSR sea ice concentration

Model vs. observations, sea ice class contingency tables

Date: 2025-01-17:

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 62918 14026 162 157 11 2 3 0
OW 804 1373 197 295 138 37 7 0
VODI 1814 595 183 397 328 147 52 0
ODI 1875 199 72 236 434 292 128 0
CDI 0 148 70 240 562 1178 1073 33
VCDI 0 28 33 104 484 2434 26595 60946
...date precedes bulletin

Date: 2025-01-19:

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 62633 13730 180 117 15 2 0 0
OW 967 1152 170 311 139 34 0 0
VODI 1823 638 131 409 354 131 7 0
ODI 1887 266 93 278 411 283 41 1
CDI 0 151 97 268 600 1091 831 8
VCDI 0 5 18 140 533 3689 28917 58259
...date precedes bulletin

Date: 2025-01-21:

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 62492 13993 268 82 14 1 0 0
OW 825 918 218 307 93 20 2 0
VODI 1796 325 156 454 429 87 14 0
ODI 1903 175 88 256 520 379 47 0
CDI 0 59 37 193 567 1625 1164 2
VCDI 0 1 6 40 255 4135 34699 52165
...date precedes bulletin

Date: 2025-01-23:

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 62356 13661 94 89 27 3 0 0
OW 844 1006 234 225 76 26 6 0
VODI 1794 469 141 431 304 84 18 0
ODI 1919 230 63 193 487 361 86 0
CDI 0 129 63 202 610 1555 1216 5
VCDI 0 33 17 67 464 3602 33883 53737
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 62370 13754 107 94 22 2 0 0
OW 832 940 226 241 89 27 6 0
VODI 1793 464 135 413 318 91 16 0
ODI 1918 214 63 196 470 375 90 0
CDI 0 120 60 194 603 1596 1292 7
VCDI 0 36 21 69 466 3540 33805 53735

Date: 2025-01-25:

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 60376 15193 112 90 27 10 1 0
OW 792 1219 210 231 80 28 24 0
VODI 1795 638 146 403 370 83 23 0
ODI 1923 244 90 207 423 373 71 0
CDI 0 127 61 200 465 1416 1343 0
VCDI 0 25 39 147 496 4326 40378 46605
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 60378 15266 121 100 29 8 1 0
OW 789 1192 205 239 91 35 26 0
VODI 1797 610 139 388 366 91 20 0
ODI 1922 244 92 211 429 391 76 0
CDI 0 111 64 196 463 1416 1418 2
VCDI 0 23 37 144 483 4295 40299 46603

Date: 2025-01-27:

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 59832 15790 181 175 27 20 3 0
OW 679 1355 148 178 88 41 34 0
VODI 1774 735 201 333 272 106 33 0
ODI 1933 221 103 269 348 237 90 0
CDI 0 154 72 251 576 1077 943 0
VCDI 0 15 40 196 522 4643 37795 49320
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 59832 15512 165 149 26 22 6 0
OW 679 1514 158 192 66 36 36 0
VODI 1771 795 203 347 284 103 35 0
ODI 1936 285 104 287 379 274 92 0
CDI 0 143 69 242 560 1047 823 0
VCDI 0 21 46 185 518 4642 37906 49320

Date: 2025-01-29:

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 61449 14764 156 111 22 11 0 0
OW 728 1515 198 267 70 41 11 0
VODI 1777 748 204 486 284 64 15 0
ODI 1930 153 98 297 349 160 74 0
CDI 0 47 41 176 550 784 814 0
VCDI 0 27 24 125 424 3598 35685 52533
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 61448 13887 142 117 30 17 10 0
OW 725 1496 140 192 72 38 20 0
VODI 1762 1054 169 404 244 81 33 0
ODI 1949 501 99 232 308 226 125 0
CDI 0 241 113 305 447 597 745 0
VCDI 0 75 58 212 598 3699 35666 52533

Date: 2025-01-31:

Best estimate Forecast
...observations not yet available ...observations not yet available


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