Polar Portal ########################################################## Daily and accumulated surface mass budget and melt area is calculated using output from the DMI HARMONIE-AROME IGB model. This model is run daily for weather prediction purposes and the SMB model output is provided here purely for information purposes. While we do strive to provide data in near real-time, DMI takes no responsibility for any errors, gaps or other data deficiencies or any losses suffered as a result of these. The surface mass balance model is described in Langen et al., 2017 Liquid Water Flow and Retention on the Greenland Ice Sheet in the Regional Climate Model HIRHAM5: Local and Large-Scale Impacts , Frontiers in Earth Science, 4  (https://www.frontiersin.org/article/10.3389/feart.2016.00110). PLEASE NOTE: Surface mass balance is a model product augmented with observations. In an initial set-up ("assimilation") step, the HARMONIE-AROME model makes a short term forecast which is compared to meteorological observations and, if necessary, slightly corrected. This observation-enhanced model field is then used as a basis to run the dedicated surface mass balance model. This implies that the real-time calculated surface mass balance depends on the underlying operational weather model. Operational models are routinely updated, and even though the results based on the different models resemble each other, they are not identical. As a consequence, time series of the calculated surface mass balances or the comparison of results from different years should be treated with some caution. Note that the long-term climatology used in the polarportal plots (the average period from 1981-2010) are based on similar output from a different climate model, HIRHAM5 also run at DMI using the ERA-Interim reanalysis (Mottram et al., 2017 Surface mass balance of the Greenland ice sheet in the regional climate model HIRHAM5: Present state and future prospects, Journal of Low Temperature Science, 75, 105-115: https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/65106/1/12_105-115.pdf). However, the same SMB model is used to calculate melt and SMB for the background period so that the variables are comparable. Data from this constant version is also freely available to download (see: http://www.prudence.dmi.dk/data/temp/RUM/HIRHAM/Greenland/ERAI). Please acknowledge DMI/Polar Portal if you use this data in published works. We recommend that you contact us before working with the data to avoid possible misinterpretation. Many more variables are available and we can supply further data for scientific purposes. Please contact info@polarportal.dk. ########################################################## Date SMB(Gt/day) SMBacc(Gt) 20220901 0.878 0.9 20220902 0.770 1.6 20220903 4.783 6.4 20220904 0.036 6.5 20220905 -0.471 6.0 20220906 0.419 6.4 20220907 -0.380 6.0 20220908 1.191 7.2 20220909 1.320 8.5 20220910 0.821 9.4 20220911 5.375 14.7 20220912 3.255 18.0 20220913 1.135 19.1 20220914 1.144 20.3 20220915 4.318 24.6 20220916 2.201 26.8 20220917 4.206 31.0 20220918 4.906 35.9 20220919 2.403 38.3 20220920 2.030 40.3 20220921 2.167 42.5 20220922 4.284 46.8 20220923 8.062 54.9 20220924 9.522 64.4 20220925 0.731 65.1 20220926 2.793 67.9 20220927 3.385 71.3 20220928 1.466 72.8 20220929 0.899 73.7 20220930 1.496 75.1 20221001 2.779 77.9 20221002 3.212 81.1 20221003 2.862 84.0 20221004 1.293 85.3 20221005 1.487 86.8 20221006 0.807 87.6 20221007 0.667 88.3 20221008 0.680 88.9 20221009 0.681 89.6 20221010 2.437 92.1 20221011 2.840 94.9 20221012 1.912 96.8 20221013 0.567 97.4 20221014 3.247 100.6 20221015 1.177 101.8 20221016 4.889 106.7 20221017 7.231 113.9 20221018 5.940 119.9 20221019 4.188 124.0 20221020 1.836 125.9 20221021 4.814 130.7 20221022 4.712 135.4 20221023 3.357 138.8 20221024 2.542 141.3 20221025 2.050 143.4 20221026 1.590 144.9 20221027 4.302 149.2 20221028 5.248 154.5 20221029 6.572 161.1 20221030 2.352 163.4 20221031 2.510 165.9 20221101 1.902 167.8 20221102 0.908 168.7 20221103 0.799 169.5 20221104 3.429 173.0 20221105 3.711 176.7 20221106 2.337 179.0 20221107 1.401 180.4 20221108 2.008 182.4 20221109 1.156 183.6 20221110 1.424 185.0 20221111 2.713 187.7 20221112 2.563 190.3 20221113 4.552 194.8 20221114 6.482 201.3 20221115 3.402 204.7 20221116 2.188 206.9 20221117 4.642 211.5 20221118 4.173 215.7 20221119 3.112 218.8 20221120 4.092 222.9 20221121 5.505 228.4 20221122 4.115 232.5 20221123 1.332 233.9 20221124 0.376 234.3 20221125 2.149 236.4 20221126 1.375 237.8 20221127 0.478 238.3 20221128 1.654 239.9 20221129 2.473 242.4 20221130 7.989 250.4 20221201 7.500 257.9 20221202 2.917 260.8 20221203 8.828 269.6 20221204 2.038 271.7 20221205 1.065 272.7 20221206 1.627 274.3 20221207 1.899 276.2 20221208 1.038 277.3 20221209 3.481 280.8 20221210 2.959 283.7 20221211 0.843 284.6 20221212 0.031 284.6 20221213 0.864 285.5 20221214 0.968 286.4 20221215 2.069 288.5 20221216 1.913 290.4 20221217 0.123 290.5 20221218 0.544 291.1 20221219 1.614 292.7 20221220 1.011 293.7 20221221 0.350 294.1 20221222 0.088 294.1 20221223 0.110 294.3 20221224 0.261 294.5 20221225 0.291 294.8 20221226 0.276 295.1 20221227 0.579 295.7 20221228 0.695 296.4 20221229 0.815 297.2 20221230 0.556 297.7 20221231 0.745 298.5 20230101 2.924 301.4 20230102 3.270 304.7 20230103 2.718 307.4 20230104 1.173 308.6 20230105 0.948 309.5 20230106 0.322 309.8 20230107 0.503 310.3 20230108 0.499 310.8 20230109 0.385 311.2 20230110 0.347 311.6 20230111 0.243 311.8 20230112 0.301 312.1 20230113 0.284 312.4 20230114 1.650 314.0 20230115 1.183 315.2 20230116 1.319 316.5 20230117 0.573 317.1 20230118 0.557 317.7 20230119 1.790 319.5 20230120 2.943 322.4 20230121 3.017 325.4 20230122 3.397 328.8 20230123 1.536 330.4 20230124 1.121 331.5 20230125 3.935 335.4 20230126 5.089 340.5 20230127 2.265 342.8 20230128 2.845 345.6 20230129 0.772 346.4 20230130 0.594 347.0 20230131 0.735 347.7 20230201 1.342 349.0 20230202 1.326 350.4 20230203 2.848 353.2 20230204 4.374 357.6 20230205 5.602 363.2 20230206 2.660 365.9 20230207 1.254 367.1 20230208 1.171 368.3 20230209 1.377 369.7 20230210 2.066 371.7 20230211 2.162 373.9 20230212 1.243 375.1 20230213 3.564 378.7 20230214 3.521 382.2 20230215 0.888 383.1 20230216 0.644 383.7 20230217 0.816 384.6 20230218 2.733 387.3 20230219 2.092 389.4 20230220 1.123 390.5 20230221 0.882 391.4 20230222 2.095 393.5 20230223 1.885 395.4 20230224 11.322 406.7 20230225 5.671 412.4 20230226 1.806 414.2 20230227 9.284 423.5 20230228 8.043 431.5 20230301 3.165 434.7 20230302 1.563 436.2 20230303 2.280 438.5 20230304 2.294 440.8 20230305 1.881 442.7 20230306 2.295 445.0 20230307 0.572 445.6 20230308 1.063 446.6 20230309 1.101 447.7 20230310 0.725 448.4 20230311 0.555 449.0 20230312 0.660 449.7 20230313 0.143 449.8 20230314 0.050 449.8 20230315 0.783 450.6 20230316 0.736 451.4 20230317 0.431 451.8 20230318 0.550 452.3 20230319 0.546 452.9 20230320 0.260 453.2 20230321 0.086 453.2 20230322 0.158 453.4 20230323 0.225 453.6 20230324 0.084 453.7 20230325 0.131 453.8 20230326 0.035 453.9 20230327 0.058 453.9 20230328 0.004 453.9 20230329 0.028 454.0 20230330 0.984 454.9 20230331 1.773 456.7 20230401 1.668 458.4 20230402 0.399 458.8 20230403 0.745 459.5 20230404 1.159 460.7 20230405 0.709 461.4 20230406 0.649 462.1 20230407 1.697 463.7 20230408 7.206 471.0 20230409 6.260 477.2 20230410 6.643 483.9 20230411 1.421 485.3 20230412 0.585 485.9 20230413 0.966 486.8 20230414 0.346 487.2 20230415 0.126 487.3 20230416 0.488 487.8 20230417 3.291 491.1 20230418 2.971 494.1 20230419 1.805 495.9 20230420 0.597 496.5 20230421 0.290 496.7 20230422 0.985 497.7 20230423 1.743 499.5 20230424 0.920 500.4 20230425 0.992 501.4 20230426 1.902 503.3 20230427 0.314 503.6 20230428 0.255 503.9 20230429 0.395 504.2 20230430 -0.259 504.0 20230501 -0.366 503.6 20230502 -0.287 503.3 20230503 0.203 503.5 20230504 2.625 506.2 20230505 0.670 506.8 20230506 0.934 507.8 20230507 0.767 508.5 20230508 1.251 509.8 20230509 1.111 510.9 20230510 1.287 512.2 20230511 4.423 516.6 20230512 1.881 518.5 20230513 0.488 519.0 20230514 0.612 519.6 20230515 0.682 520.3 20230516 1.865 522.1 20230517 1.172 523.3 20230518 0.898 524.2 20230519 6.075 530.3 20230520 4.226 534.5 20230521 2.470 537.0 20230522 2.324 539.3 20230523 2.625 541.9 20230524 1.517 543.4 20230525 0.748 544.2 20230526 1.332 545.5 20230527 2.954 548.5 20230528 0.997 549.5 20230529 1.524 551.0 20230530 2.614 553.6 20230531 4.887 558.5 20230601 5.007 563.5 20230602 2.973 566.5 20230603 1.692 568.2 20230604 1.162 569.3 20230605 1.087 570.4 20230606 1.604 572.0 20230607 2.142 574.2 20230608 1.543 575.7 20230609 1.637 577.3 20230610 3.645 581.0 20230611 3.458 584.4 20230612 2.244 586.7 20230613 3.871 590.6 20230614 4.522 595.1 20230615 4.405 599.5 20230616 1.632 601.1 20230617 1.883 603.0 20230618 0.130 603.1 20230619 -0.494 602.6 20230620 0.999 603.6 20230621 3.754 607.4 20230622 3.266 610.7 20230623 0.921 611.6 20230624 2.775 614.4 20230625 1.757 616.1 20230626 2.431 618.5 20230627 0.834 619.4 20230628 -0.746 618.6 20230629 -1.389 617.2 20230630 -1.545 615.7 20230701 -1.922 613.8 20230702 -5.011 608.8 20230703 -6.404 602.4 20230704 -6.117 596.2 20230705 -5.212 591.0 20230706 -3.466 587.6 20230707 -3.047 584.5 20230708 -4.278 580.2 20230709 -6.537 573.7 20230710 -7.096 566.6 20230711 -6.351 560.3 20230712 -8.376 551.9 20230713 -8.585 543.3 20230714 -7.553 535.7 20230715 -6.495 529.2 20230716 -5.704 523.5 20230717 -5.313 518.2 20230718 -5.808 512.4 20230719 -6.194 506.2 20230720 -6.584 499.6 20230721 -4.965 494.7 20230722 -6.058 488.6 20230723 -7.190 481.4 20230724 -5.972 475.5 20230725 -5.973 469.5 20230726 -6.688 462.8 20230727 -6.275 456.5 20230728 -4.690 451.8 20230729 -3.421 448.4 20230730 -3.337 445.1 20230731 -1.945 443.1 20230801 -0.548 442.6 20230802 -0.448 442.1 20230803 -2.528 439.6 20230804 -3.620 436.0 20230805 -3.199 432.8 20230806 -2.523 430.3 20230807 -2.898 427.4 20230808 -2.176 425.2 20230809 -2.188 423.0 20230810 -1.961 421.0 20230811 -1.608 419.4 20230812 -1.332 418.1 20230813 -2.602 415.5 20230814 -1.583 413.9 20230815 -1.958 412.0 20230816 -2.132 409.8 20230817 -2.666 407.2 20230818 -2.566 404.6 20230819 -2.842 401.7 20230820 0.917 402.7 20230821 -0.607 402.1 20230822 -4.429 397.6 20230823 -6.347 391.3 20230824 -0.188 391.1 20230825 -0.558 390.5 20230826 -1.110 389.4 20230827 0.214 389.6 20230828 1.881 391.5 20230829 0.678 392.2 20230830 2.091 394.3 20230831 3.459 397.8