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

Validation of sea ice concentration - Full domain

Bulletin date: 2022-02-24

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

Model vs. observations, sea ice class contingency tables

Date: 2022-02-18:

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 66917 14727 192 947 399 58 24 0 OW 54 508 57 445 354 43 24 0 VODI 0 320 26 359 627 94 32 0 ODI 0 143 13 168 606 171 56 0 CDI 0 143 23 175 826 788 188 37 VCDI 0 405 35 432 1163 6605 22126 66738	...date precedes bulletin

Date: 2022-02-20:

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 67416 13873 175 948 394 109 26 0 OW 69 484 51 437 325 75 20 0 VODI 4 326 37 290 664 135 30 0 ODI 0 139 16 175 563 202 56 0 CDI 0 93 13 135 670 738 188 21 VCDI 0 333 34 272 1157 7882 23683 64790	...date precedes bulletin

Date: 2022-02-22:

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 67462 13587 166 810 291 86 18 0 OW 80 517 53 474 294 53 18 0 VODI 7 305 31 371 591 95 23 0 ODI 0 110 17 173 657 192 56 7 CDI 0 71 10 144 777 877 260 52 VCDI 0 157 25 270 1395 6750 25833 63883	...date precedes bulletin

Date: 2022-02-24:

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 67633 13446 152 807 371 128 22 0 OW 73 575 52 349 294 97 16 0 VODI 11 361 38 320 495 170 21 0 ODI 0 171 20 187 460 210 40 0 CDI 0 117 22 189 583 474 151 10 VCDI 0 190 26 239 1075 5605 23006 68842	observations Ice free Ice free near MIZ OW VODI ODI CDI VCDI near MIZ VCDI m o d e l Ice free 67633 13432 152 796 386 134 21 0 OW 71 600 56 345 294 89 18 0 VODI 13 358 33 328 505 175 23 0 ODI 0 174 27 201 438 207 44 0 CDI 0 102 14 188 568 493 194 10 VCDI 0 194 28 233 1087 5586 22956 68842

Date: 2022-02-26:

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 67304 13518 140 815 618 117 4 0 OW 75 575 47 366 275 98 7 0 VODI 9 410 33 303 450 200 15 0 ODI 0 226 21 192 529 235 27 0 CDI 0 139 12 151 790 559 98 9 VCDI 0 341 35 344 2031 7018 25512 63400	observations Ice free Ice free near MIZ OW VODI ODI CDI VCDI near MIZ VCDI m o d e l Ice free 67300 13524 139 802 622 116 5 0 OW 78 584 44 364 262 101 9 0 VODI 10 399 35 341 469 191 14 0 ODI 0 224 25 175 528 245 26 0 CDI 0 130 10 147 770 579 85 9 VCDI 0 348 35 342 2042 6995 25524 63400

Date: 2022-02-28:

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 67306 13685 154 762 569 163 2 0 OW 81 495 66 446 256 109 4 0 VODI 5 267 41 433 553 174 11 0 ODI 0 120 15 165 658 281 29 0 CDI 0 102 12 112 766 975 108 28 VCDI 0 191 23 185 1051 6512 23358 66775	observations Ice free Ice free near MIZ OW VODI ODI CDI VCDI near MIZ VCDI m o d e l Ice free 67314 13303 147 811 664 264 7 0 OW 72 524 60 365 296 162 11 0 VODI 6 373 34 340 444 253 37 0 ODI 0 218 24 173 470 273 45 0 CDI 0 174 14 155 604 787 158 20 VCDI 0 268 32 259 1375 6475 23254 66783

Date: 2022-03-02:

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 67036 14123 134 707 521 112 24 0 OW 55 487 56 467 267 44 17 0 VODI 0 256 56 453 517 74 25 0 ODI 0 102 9 212 664 169 74 0 CDI 0 94 15 133 889 652 180 25 VCDI 0 175 20 232 1381 6604 22239 67748	observations Ice free Ice free near MIZ OW VODI ODI CDI VCDI near MIZ VCDI m o d e l Ice free 67037 13691 123 791 732 171 42 0 OW 54 543 52 353 305 81 24 0 VODI 0 383 52 388 437 149 61 0 ODI 0 177 20 203 499 233 85 1 CDI 0 177 11 158 687 679 233 62 VCDI 0 266 32 311 1579 6342 22114 67710

Date: 2022-03-04:

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 66760 14230 147 810 442 154 86 0 OW 55 510 53 384 329 40 35 0 VODI 0 280 44 351 607 76 51 0 ODI 0 117 17 188 603 184 52 0 CDI 0 82 19 142 700 832 217 16 VCDI 0 140 25 229 1099 5711 19979 71252	observations Ice free Ice free near MIZ OW VODI ODI CDI VCDI near MIZ VCDI m o d e l Ice free 66760 13855 146 852 629 202 111 0 OW 55 588 42 317 379 69 50 0 VODI 0 355 39 305 469 141 87 0 ODI 0 181 22 162 509 227 99 7 CDI 0 186 21 159 586 736 247 27 VCDI 0 194 35 309 1208 5622 19826 71234

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