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)
20180901 0.482261 0.482261
20180902 0.76814 1.2504
20180903 1.77703 3.02743
20180904 0.321425 3.34885
20180905 3.42908 6.77793
20180906 4.36128 11.1392
20180907 3.56444 14.7036
20180908 3.12055 17.8242
20180909 2.3511 20.1753
20180910 2.40043 22.5757
20180911 2.54748 25.1232
20180912 1.85147 26.9747
20180913 -0.0479079 26.9268
20180914 0.393238 27.32
20180915 0.570876 27.8909
20180916 0.439938 28.3308
20180917 1.2581 29.5889
20180918 0.93293 30.5218
20180919 -0.0879011 30.4339
20180920 -0.0133131 30.4206
20180921 0.148078 30.5687
20180922 0.299797 30.8685
20180923 2.48545 33.3539
20180924 1.98254 35.3365
20180925 0.808139 36.1446
20180926 1.02483 37.1694
20180927 5.52793 42.6974
20180928 6.8572 49.5546
20180929 1.71335 51.2679
20180930 4.60207 55.87
20181001 2.88379 58.7538
20181002 1.09633 59.8501
20181003 0.816566 60.6667
20181004 0.311578 60.9783
20181005 2.58705 63.5653
20181006 4.62651 68.1918
20181007 1.28584 69.4777
20181008 0.358508 69.8362
20181009 0.486045 70.3222
20181010 0.959127 71.2813
20181011 1.09791 72.3792
20181012 4.69225 77.0715
20181013 2.54603 79.6175
20181014 3.46424 83.0818
20181015 1.8255 84.9073
20181016 1.07422 85.9815
20181017 0.941121 86.9226
20181018 1.82101 88.7436
20181019 2.09009 90.8337
20181020 1.56244 92.3961
20181021 1.39148 93.7876
20181022 0.905564 94.6932
20181023 1.25391 95.9471
20181024 0.532405 96.4795
20181025 0.428238 96.9077
20181026 2.75274 99.6605
20181027 8.21559 107.876
20181028 2.33557 110.212
20181029 1.56444 111.776
20181030 0.991523 112.768
20181031 1.62138 114.389
20181101 2.06825 116.457
20181102 0.724859 117.182
20181103 0.819098 118.001
20181104 1.13989 119.141
20181105 1.21867 120.36
20181106 1.11761 121.477
20181107 0.967009 122.444
20181108 2.61872 125.063
20181109 2.5401 127.603
20181110 0.696841 128.3
20181111 0.274317 128.574
20181112 1.96831 130.543
20181113 1.01464 131.557
20181114 0.58941 132.147
20181115 1.05616 133.203
20181116 1.66609 134.869
20181117 10.1534 145.022
20181118 6.71691 151.739
20181119 3.96659 155.706
20181120 11.5948 167.301
20181121 3.51017 170.811
20181122 2.42271 173.234
20181123 1.90966 175.143
20181124 2.71617 177.859
20181125 2.65756 180.517
20181126 0.558677 181.076
20181127 0.18631 181.262
20181128 0.287527 181.549
20181129 1.38641 182.936
20181130 0.463013 183.399
20181201 0.745783 184.145
20181202 1.30946 185.454
20181203 0.737772 186.192
20181204 0.290808 186.483
20181205 0.787788 187.271
20181206 0.686136 187.957
20181207 1.45494 189.412
20181208 0.55344 189.965
20181209 0.397213 190.362
20181210 1.37485 191.737
20181211 4.03558 195.773
20181212 4.84386 200.617
20181213 3.64753 204.264
20181214 3.00334 207.267
20181215 0.306193 207.574
20181216 0.384935 207.959
20181217 1.41204 209.371
20181218 0.972733 210.343
20181219 1.88491 212.228
20181220 2.01789 214.246
20181221 1.11631 215.362
20181222 1.90251 217.265
20181223 7.97035 225.235
20181224 4.33119 229.566
20181225 1.71207 231.279
20181226 1.79093 233.069
20181227 1.08284 234.152
20181228 0.828179 234.98
20181229 0.75702 235.738
20181230 0.374731 236.112
20181231 0.158159 236.27
20190101 2.89785 239.168
20190102 4.07366 243.242
20190103 3.58182 246.824
20190104 6.37619 253.2
20190105 3.69975 256.9
20190106 1.119 258.019
20190107 1.10741 259.126
20190108 6.34953 265.476
20190109 5.67167 271.147
20190110 1.26884 272.416
20190111 0.806346 273.222
20190112 0.779901 274.002
20190113 0.958245 274.961
20190114 0.321493 275.282
20190115 1.02104 276.303
20190116 2.20502 278.508
20190117 1.1907 279.699
20190118 3.02125 282.72
20190119 4.10506 286.825
20190120 1.64799 288.473
20190121 1.38855 289.862
20190122 2.45569 292.317
20190123 1.92459 294.242
20190124 0.866834 295.109
20190125 0.467768 295.577
20190126 1.45917 297.036
20190127 3.41896 300.455
20190128 1.44722 301.902
20190129 0.400058 302.302
20190130 0.245884 302.548
20190131 0.173291 302.721
20190201 0.90706 303.628
20190202 2.87828 306.506
20190203 1.21773 307.724
20190204 1.1258 308.85
20190206 0.366774 310.218
20190207 0.813778 311.032
20190208 0.624627 311.656
20190209 0.463653 312.12
20190210 0.891753 313.012
20190211 1.63267 314.644
20190212 0.653679 315.298
20190213 0.493331 315.791
20190214 0.516657 316.308
20190215 0.618123 316.926
20190216 0.392445 317.319
20190217 0.524205 317.843
20190218 2.7091 320.552
20190219 3.15184 323.704
20190220 3.75014 327.454
20190221 6.75858 334.212
20190222 4.38703 338.6
20190223 2.15017 340.75
20190224 1.11791 341.868
20190225 3.06753 344.935
20190226 0.799367 345.735
20190227 1.40236 347.137
20190228 3.43194 350.569
20190301 4.52942 355.098
20190302 1.52273 356.621
20190303 1.0442 357.665
20190304 0.378512 358.044
20190305 0.355126 358.399
20190306 0.833511 359.232
20190307 2.08407 361.316
20190308 1.1547 362.471
20190309 0.459245 362.93
20190310 0.35279 363.283
20190311 0.244903 363.528
20190312 0.968607 364.497
20190313 1.11141 365.608
20190314 0.73184 366.34
20190315 0.884845 367.225
20190316 1.03643 368.261
20190317 1.59424 369.855
20190318 3.35953 373.215
20190319 1.95234 375.167
20190320 2.97979 378.147
20190321 1.42037 379.567
20190322 1.83136 381.399
20190323 0.659923 382.059
20190324 1.15793 383.217
20190325 4.61749 387.834
20190326 2.93228 390.766
20190327 0.958766 391.725
20190328 0.938532 392.664
20190329 0.473431 393.137
20190330 1.80711 394.944
20190331 1.40745 396.352
20190401 0.47322 396.825
20190402 5.29721 402.122
20190403 7.15712 409.279
20190404 1.50155 410.781
20190405 0.817565 411.598
20190406 3.97479 415.573
20190407 4.5519 420.125
20190408 3.36113 423.486
20190409 2.41778 425.904
20190410 2.18764 428.092
20190411 3.29329 431.385
20190412 7.17178 438.557
20190413 7.94356 446.5
20190414 8.29704 454.797
20190415 5.71728 460.515
20190416 2.65859 463.173
20190417 3.77621 466.949
20190418 2.76932 469.719
20190419 2.92631 472.645
20190420 1.89565 474.541
20190421 1.22518 475.766
20190422 1.56899 477.335
20190423 1.52711 478.862
20190424 4.69508 483.557
20190425 6.46605 490.023
20190426 3.24127 493.264
20190427 2.91996 496.184
20190428 1.10727 497.292
20190429 1.82026 499.112
20190430 2.85405 501.966
20190501 0.606008 502.572
20190502 1.9651 504.537
20190503 1.25018 505.787
20190504 1.3307 507.118
20190505 2.06352 509.181
20190506 0.588581 509.77
20190507 -0.351027 509.419
20190508 -0.18349 509.235
20190509 -0.199646 509.036
20190510 -0.19628 508.84
20190511 -0.235717 508.604
20190512 -0.29254 508.311
20190513 -0.26992 508.041
20190514 2.04233 510.084
20190515 2.56748 512.651
20190516 0.690175 513.341
20190517 0.144224 513.486
20190518 0.597939 514.083
20190519 0.927635 515.011
20190520 0.275645 515.287
20190521 0.0477552 515.334
20190522 -0.0713638 515.263
20190523 -0.603322 514.66
20190524 -0.927854 513.732
20190525 -1.08062 512.651
20190526 -1.29616 511.355
20190527 -0.661383 510.694
20190528 -1.0968 509.597
20190529 -0.698071 508.899
20190530 -0.0312961 508.868
20190531 -0.331821 508.536
20190601 -0.687193 507.849
20190602 -0.758325 507.09
20190603 -0.780693 506.31
20190604 -0.0918583 506.218
20190605 -0.59996 505.618
20190606 -0.454684 505.163
20190607 -0.28083 504.882
20190608 -0.784791 504.097
20190609 -1.07856 503.019
20190610 -1.5594 501.46
20190611 0.101127 501.561
20190612 -0.619115 500.942
20190613 -2.41822 498.523
20190614 -1.98694 496.536
20190615 -1.77869 494.758
20190616 -2.76508 491.993
20190617 -3.75143 488.241
20190618 -3.71493 484.526
20190619 -1.50091 483.025
20190620 -1.47101 481.554
20190621 -1.74893 479.805
20190622 -0.190154 479.615
20190623 -0.16001 479.455
20190624 1.03831 480.494
20190625 -0.549971 479.944
20190626 -1.47129 478.472
20190627 -1.17804 477.294
20190628 -2.472 474.822
20190629 -4.26493 470.557
20190630 -3.3493 467.208
20190701 -4.2217 462.986
20190702 -4.18891 458.797
20190703 -4.09089 454.707
20190704 -5.89858 448.808
20190705 -6.56972 442.238
20190706 -7.12771 435.111
20190707 -7.96563 427.145
20190708 -7.39566 419.749
20190709 -7.46856 412.281
20190710 -6.86733 405.413
20190711 -6.6953 398.718
20190712 -7.26667 391.451
20190713 -7.65521 383.796
20190714 -8.08301 375.713
20190715 -7.96193 367.751
20190716 -7.41325 360.338
20190717 -6.8538 353.484
20190718 -7.48238 346.002
20190719 -5.36548 340.636
20190720 -6.10134 334.535
20190721 -5.47857 329.056
20190722 -5.59444 323.462
20190723 -7.90085 315.561
20190724 -7.96101 307.6
20190725 -6.93998 300.66
20190726 -5.26966 295.39
20190727 -4.35249 291.038
20190728 -1.507 289.531
20190729 -2.35241 287.179
20190730 -7.20833 279.97
20190731 -10.5526 269.418
20190801 -11.0894 258.328
20190802 -10.1954 248.133
20190803 -8.50434 239.628
20190804 -7.61809 232.01
20190805 -6.86 225.15
20190806 -6.09043 219.06
20190807 -5.2067 213.853
20190808 -4.51612 209.337
20190809 -4.61231 204.725
20190810 -4.35008 200.375
20190811 -4.38564 195.989
20190812 -4.01449 191.975
20190813 -3.89809 188.077
20190814 -3.86481 184.212
20190815 -3.23351 180.978
20190816 -2.7383 178.24
20190817 -2.23507 176.005
20190818 -1.36605 174.639
20190819 -1.88024 172.759
20190820 -1.60384 171.155
20190821 -1.34839 169.806
20190822 -0.867952 168.938
20190823 0.0625894 169.001
20190824 0.280176 169.281
20190825 -0.458973 168.822
20190826 -0.379294 168.443
20190827 0.152509 168.595
20190828 0.522686 169.118
20190829 1.07924 170.197
20190830 -0.884101 169.313
20190831 -0.0188566 169.294