Polar Portal

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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.

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Date      SMB(Gt/day)  SMBacc(Gt)
20170901 2.11576 2.11576
20170902 2.42226 4.53802
20170903 0.603324 5.14134
20170904 2.22696 7.36831
20170905 2.25341 9.62172
20170906 1.4569 11.0786
20170907 1.43509 12.5137
20170908 0.160404 12.6741
20170909 0.323831 12.9979
20170910 3.83088 16.8288
20170911 3.12068 19.9495
20170912 1.00194 20.9514
20170913 0.979738 21.9312
20170914 6.44348 28.3747
20170915 8.84685 37.2215
20170916 4.09128 41.3128
20170917 7.018 48.3308
20170918 1.48627 49.8171
20170919 0.936858 50.7539
20170920 0.625737 51.3796
20170921 1.52048 52.9001
20170922 1.27399 54.1741
20170923 1.3997 55.5738
20170924 6.1775 61.7513
20170925 6.06619 67.8175
20170926 5.67252 73.49
20170927 5.93331 79.4233
20170928 3.86514 83.2885
20170929 2.15322 85.4417
20170930 2.9787 88.4204
20171001 2.81142 91.2318
20171002 1.1778 92.4096
20171003 0.483393 92.893
20171004 0.923638 93.8167
20171005 2.46039 96.2771
20171006 1.65761 97.9347
20171007 2.65594 100.591
20171008 2.20829 102.799
20171009 1.05623 103.855
20171010 1.80378 105.659
20171011 2.5101 108.169
20171012 0.989686 109.159
20171013 1.35561 110.514
20171014 2.13722 112.652
20171015 1.91341 114.565
20171016 1.79595 116.361
20171017 5.36209 121.723
20171018 4.46888 126.192
20171019 4.45527 130.647
20171020 4.12188 134.769
20171021 3.09263 137.862
20171022 1.00927 138.871
20171023 0.698024 139.569
20171024 3.4609 143.03
20171025 4.1448 147.175
20171026 11.2657 158.44
20171027 5.42953 163.87
20171028 1.91755 165.787
20171029 6.4659 172.253
20171030 6.08376 178.337
20171031 1.96817 180.305
20171101 6.26214 186.567
20171102 3.16841 189.736
20171103 0.913604 190.649
20171104 0.620627 191.27
20171105 5.81386 197.084
20171106 2.9345 200.018
20171107 2.07966 202.098
20171108 1.55243 203.65
20171109 0.825993 204.476
20171110 0.377861 204.854
20171111 0.535958 205.39
20171112 4.38312 209.773
20171113 2.88583 212.659
20171114 1.37448 214.034
20171115 1.16745 215.201
20171116 1.45104 216.652
20171117 1.0675 217.72
20171118 0.585179 218.305
20171119 0.505167 218.81
20171120 0.144306 218.954
20171121 0.0568201 219.011
20171122 -0.156244 218.855
20171123 -0.00162031 218.853
20171124 1.80899 220.662
20171125 4.39532 225.058
20171126 1.29783 226.355
20171127 0.503489 226.859
20171128 2.26789 229.127
20171129 6.73726 235.864
20171130 4.66184 240.526
20171201 3.73767 244.264
20171202 2.40796 246.672
20171203 1.6099 248.281
20171204 0.830984 249.112
20171205 0.394094 249.506
20171206 0.943224 250.45
20171207 1.29323 251.743
20171208 2.41052 254.153
20171209 4.04571 258.199
20171210 2.4759 260.675
20171211 2.91737 263.592
20171212 2.01204 265.604
20171213 0.865495 266.47
20171214 0.676154 267.146
20171215 1.65155 268.798
20171216 3.36734 272.165
20171217 1.70487 273.87
20171218 3.16793 277.038
20171219 1.58015 278.618
20171220 0.827235 279.445
20171221 0.420707 279.866
20171222 0.464332 280.33
20171223 0.238591 280.569
20171224 0.49826 281.067
20171225 0.598637 281.666
20171226 0.301951 281.968
20171227 2.02161 283.989
20171228 1.64449 285.634
20171229 0.687259 286.321
20171230 0.535197 286.856
20171231 0.753489 287.61
20180101 1.32783 288.938
20180102 0.876473 289.814
20180103 0.662928 290.477
20180104 0.840019 291.317
20180105 0.536822 291.854
20180106 0.838122 292.692
20180107 1.66118 294.353
20180108 1.51429 295.867
20180109 2.45877 298.326
20180110 6.72185 305.048
20180111 3.01363 308.062
20180112 2.74899 310.811
20180113 3.53975 314.35
20180114 2.44433 316.795
20180115 3.29681 320.091
20180116 3.49575 323.587
20180117 1.95832 325.546
20180118 1.108 326.654
20180119 0.48432 327.138
20180120 1.53048 328.668
20180121 1.85645 330.525
20180122 0.784927 331.31
20180123 0.562362 331.872
20180124 0.194633 332.067
20180125 1.39481 333.462
20180126 2.61972 336.081
20180127 1.07253 337.154
20180128 1.76447 338.918
20180129 1.39807 340.316
20180130 1.13424 341.451
20180131 0.44043 341.891
20180201 7.44852 349.34
20180202 4.77451 354.114
20180203 4.51033 358.624
20180204 4.89268 363.517
20180205 0.711478 364.228
20180206 3.54642 367.775
20180207 4.15809 371.933
20180208 0.779316 372.712
20180209 1.02372 373.736
20180210 1.01965 374.756
20180211 1.11969 375.875
20180212 1.7788 377.654
20180213 2.80712 380.461
20180214 2.76737 383.229
20180215 3.15796 386.387
20180216 5.69803 392.085
20180217 3.38762 395.472
20180218 2.51655 397.989
20180219 6.21857 404.207
20180220 6.20428 410.412
20180221 4.62327 415.035
20180222 6.85143 421.886
20180223 5.15255 427.039
20180224 13.4564 440.495
20180225 3.69749 444.193
20180226 4.48482 448.678
20180227 1.33362 450.011
20180228 0.563898 450.575
20180301 0.99557 451.571
20180302 3.07679 454.648
20180303 1.17396 455.822
20180304 0.499052 456.321
20180305 0.407152 456.728
20180306 0.206457 456.934
20180307 0.323784 457.258
20180308 1.37881 458.637
20180309 1.9303 460.567
20180310 1.61737 462.184
20180311 0.821006 463.005
20180312 0.610397 463.616
20180313 0.438892 464.055
20180314 0.791862 464.847
20180315 0.583196 465.43
20180316 0.208731 465.639
20180317 0.684174 466.323
20180318 3.00542 469.328
20180319 2.44315 471.771
20180320 1.78509 473.556
20180321 1.63533 475.192
20180322 1.07238 476.264
20180323 1.02834 477.292
20180324 2.34182 479.634
20180325 3.29212 482.926
20180326 4.81533 487.742
20180327 3.35657 491.098
20180328 1.00688 492.105
20180329 0.287891 492.393
20180330 0.497323 492.89
20180331 1.30639 494.197
20180401 0.52071 494.717
20180402 0.476839 495.194
20180403 0.504929 495.699
20180404 0.54318 496.242
20180405 0.463138 496.706
20180406 0.544714 497.25
20180407 2.69806 499.948
20180408 2.90997 502.858
20180409 2.03221 504.891
20180410 3.15435 508.045
20180411 3.66316 511.708
20180412 2.06626 513.774
20180413 1.86923 515.644
20180414 4.53948 520.183
20180415 1.72601 521.909
20180416 1.61093 523.52
20180417 1.14506 524.665
20180418 0.975901 525.641
20180419 0.752905 526.394
20180420 0.625464 527.019
20180421 0.905411 527.925
20180422 0.586124 528.511
20180423 0.360429 528.871
20180424 0.42053 529.292
20180425 0.60646 529.898
20180426 0.536064 530.434
20180427 0.354847 530.789
20180428 4.65086 535.44
20180429 1.5484 536.988
20180430 1.35987 538.348
20180501 3.29004 541.638
20180502 3.13475 544.773
20180503 3.70274 548.476
20180504 4.27183 552.748
20180505 2.83855 555.586
20180506 2.75494 558.341
20180507 0.585282 558.927
20180508 0.099674 559.026
20180509 0.828478 559.855
20180510 0.606859 560.462
20180511 1.08246 561.544
20180512 2.92527 564.469
20180513 3.9152 568.385
20180514 2.87918 571.264
20180515 1.65791 572.922
20180516 3.36782 576.289
20180517 5.21662 581.506
20180518 2.66502 584.171
20180519 0.685392 584.856
20180520 0.814257 585.671
20180521 0.49305 586.164
20180522 2.42724 588.591
20180523 2.17028 590.761
20180524 1.53261 592.294
20180525 0.983704 593.278
20180526 3.67343 596.951
20180527 2.06544 599.016
20180528 0.146108 599.163
20180529 0.286011 599.449
20180530 1.83914 601.288
20180531 3.11379 604.401
20180601 5.37504 609.777
20180602 4.55895 614.336
20180603 2.18157 616.517
20180604 3.1023 619.619
20180605 3.13761 622.757
20180606 3.25875 626.016
20180607 2.57167 628.587
20180608 1.64287 630.23
20180609 0.218665 630.449
20180610 -0.454022 629.995
20180611 -0.368911 629.626
20180612 -0.975995 628.65
20180613 0.177961 628.828
20180614 1.24076 630.069
20180615 -0.172917 629.896
20180616 -0.898724 628.997
20180617 -0.540917 628.456
20180618 0.463812 628.92
20180619 0.687889 629.608
20180620 0.0650315 629.673
20180621 0.522787 630.196
20180622 0.0827965 630.279
20180623 0.0305972 630.309
20180624 -0.414625 629.894
20180625 -1.3174 628.577
20180626 -1.25848 627.319
20180627 -1.94402 625.375
20180628 -0.228592 625.146
20180629 -0.473614 624.672
20180630 -0.822662 623.85
20180701 1.3591 625.209
20180702 0.428945 625.638
20180703 -2.24692 623.391
20180704 -2.38637 621.004
20180705 -2.01357 618.991
20180706 -2.83551 616.155
20180707 -2.51238 613.643
20180708 -0.637132 613.006
20180709 -1.60767 611.398
20180710 -1.05151 610.347
20180711 -0.266987 610.08
20180712 -1.10747 608.972
20180713 -1.02429 607.948
20180714 0.523313 608.471
20180715 -4.2772 604.194
20180716 -1.06212 603.132
20180717 -1.42198 601.71
20180718 -3.70875 598.001
20180719 -3.0815 594.92
20180720 -4.21463 590.705
20180721 -4.39808 586.307
20180722 -2.80997 583.497
20180723 -3.17981 580.317
20180724 -1.48451 578.833
20180725 -2.80319 576.03
20180726 -0.841451 575.188
20180727 0.427412 575.616
20180728 -1.77716 573.838
20180729 -0.654714 573.184
20180730 -3.28824 569.895
20180731 -4.4638 565.432
20180801 -4.24802 561.184
20180802 -0.234769 560.949
20180803 -2.44534 558.504
20180804 -3.06344 555.44
20180805 -4.24459 551.196
20180806 -4.82747 546.368
20180807 -2.73562 543.633
20180808 -1.25668 542.376
20180809 -2.99801 539.378
20180810 -3.72045 535.657
20180811 -4.24707 531.41
20180812 -3.19512 528.215
20180813 -3.37819 524.837
20180814 -3.23394 521.603
20180815 -3.67398 517.929
20180816 -2.38341 515.546
20180817 -2.7611 512.785
20180818 -2.69062 510.094
20180819 -2.4496 507.644
20180820 -2.38562 505.259
20180821 -0.495589 504.763
20180822 0.115872 504.879
20180823 -0.501489 504.378
20180824 0.206174 504.584
20180825 1.90607 506.49
20180826 -0.462665 506.027
20180827 -0.466557 505.561
20180828 -0.183928 505.377
20180829 0.32256 505.699
20180830 7.27862 512.978
20180831 3.58492 516.563