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) 20240901 6.098 6.1 20240902 0.936 7.0 20240903 1.766 8.8 20240904 1.479 10.3 20240905 0.695 11.0 20240906 3.587 14.6 20240907 2.747 17.3 20240908 0.903 18.2 20240909 0.443 18.7 20240910 0.215 18.9 20240911 0.163 19.0 20240912 -0.155 18.9 20240913 -0.073 18.8 20240914 -0.220 18.6 20240915 -0.007 18.6 20240916 0.323 18.9 20240917 0.623 19.5 20240918 1.670 21.2 20240919 2.281 23.5 20240920 0.221 23.7 20240921 2.777 26.5 20240922 6.026 32.5 20240923 3.960 36.5 20240924 0.877 37.3 20240925 0.886 38.2 20240926 0.983 39.2 20240927 3.161 42.4 20240928 5.500 47.9 20240929 6.184 54.0 20240930 7.178 61.2 20241001 1.805 63.0 20241002 0.897 63.9 20241003 4.410 68.3 20241004 2.512 70.9 20241005 0.537 71.4 20241006 0.459 71.8 20241007 2.252 74.1 20241008 2.242 76.3 20241009 1.613 78.0 20241010 0.654 78.6 20241011 1.076 79.7 20241012 0.484 80.2 20241013 0.351 80.5 20241014 0.169 80.7 20241015 0.299 81.0 20241016 0.163 81.2 20241017 0.139 81.3 20241018 0.489 81.8 20241019 1.313 83.1 20241020 1.227 84.3 20241021 0.932 85.3 20241022 0.803 86.1 20241023 0.521 86.6 20241024 4.355 90.9 20241025 4.565 95.5 20241026 1.396 96.9 20241027 1.191 98.1 20241028 1.125 99.2 20241029 0.766 100.0 20241030 1.269 101.2 20241031 1.644 102.9 20241101 4.036 106.9 20241102 3.598 110.5 20241103 5.175 115.7 20241104 5.203 120.9 20241105 4.865 125.8 20241106 5.973 131.7 20241107 1.464 133.2 20241108 1.815 135.0 20241109 5.634 140.6 20241110 4.008 144.7 20241111 5.985 150.6 20241112 4.390 155.0 20241113 4.502 159.5 20241114 3.678 163.2 20241115 2.059 165.3 20241116 0.921 166.2 20241117 0.533 166.7 20241118 0.557 167.3 20241119 0.345 167.6 20241120 1.094 168.7 20241121 2.205 170.9 20241122 2.008 172.9 20241123 2.875 175.8 20241124 3.077 178.9 20241125 4.231 183.1 20241126 1.858 185.0 20241127 0.814 185.8 20241128 1.749 187.5 20241129 0.895 188.4 20241130 0.380 188.8 20241201 1.119 189.9 20241202 2.775 192.7 20241203 1.081 193.8 20241204 1.071 194.9 20241205 0.392 195.3 20241206 0.265 195.5 20241207 3.709 199.2 20241208 3.292 202.5 20241209 3.101 205.6 20241210 1.139 206.8 20241211 1.956 208.7 20241212 1.862 210.6 20241213 5.936 216.5 20241214 3.298 219.8 20241215 0.969 220.8 20241216 0.524 221.3 20241217 1.077 222.4 20241218 2.488 224.9 20241219 2.800 227.7 20241220 0.545 228.2 20241221 1.069 229.3 20241222 2.023 231.3 20241223 2.442 233.7 20241224 2.702 236.4 20241225 4.224 240.7 20241226 2.704 243.4 20241227 0.791 244.2 20241228 0.764 244.9 20241229 1.004 245.9 20241230 0.827 246.8 20241231 1.287 248.0 20250101 0.418 248.5 20250102 3.334 251.8 20250103 3.237 255.0 20250104 1.327 256.4 20250105 0.995 257.4 20250106 1.394 258.8 20250107 2.083 260.8 20250108 2.603 263.4 20250109 0.815 264.3 20250110 0.141 264.4 20250111 0.441 264.8 20250112 4.469 269.3 20250113 2.062 271.4 20250114 1.918 273.3 20250115 0.347 273.6 20250116 0.536 274.2 20250117 0.390 274.6 20250118 0.298 274.9 20250119 0.594 275.5 20250120 2.230 277.7 20250121 5.633 283.3 20250122 7.013 290.3 20250123 3.746 294.1 20250124 5.133 299.2 20250125 3.779 303.0 20250126 1.382 304.4 20250127 0.863 305.2 20250128 0.971 306.2 20250129 3.491 309.7 20250130 5.406 315.1 20250131 5.952 321.0 20250201 9.386 330.4 20250202 3.242 333.7 20250203 2.680 336.4 20250204 7.195 343.6 20250205 2.637 346.2 20250206 1.624 347.8 20250207 0.773 348.6 20250208 1.255 349.8 20250209 5.182 355.0 20250210 1.261 356.3 20250211 4.827 361.1 20250212 9.563 370.7 20250213 7.001 377.7 20250214 1.650 379.3 20250215 2.115 381.4 20250216 3.506 384.9 20250217 0.968 385.9 20250218 0.458 386.4 20250219 1.935 388.3 20250220 2.018 390.3 20250221 0.812 391.1 20250222 0.943 392.1 20250223 0.428 392.5 20250224 0.992 393.5 20250225 2.450 395.9 20250226 2.675 398.6 20250227 3.293 401.9 20250228 6.752 408.7 20250301 3.926 412.6 20250302 4.828 417.4 20250303 1.792 419.2 20250304 2.385 421.6 20250305 1.963 423.6 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.246 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.247 424.8 20250306 1.248 424.8 20250306 1.248 424.8 20250307 0.215 425.0 20250308 2.839 427.9 20250309 4.943 432.8 20250310 4.174 437.0 20250311 5.176 442.2 20250312 2.384 444.5 20250313 3.658 448.2 20250314 4.836 453.0 20250315 4.720 457.8 20250316 8.050 465.8 20250317 2.236 468.0 20250318 1.416 469.5 20250319 3.505 473.0 20250320 4.278 477.2 20250321 1.934 479.2 20250322 1.952 481.1 20250323 1.228 482.4 20250324 2.372 484.7 20250325 0.919 485.6 20250208 1.258 349.8 20250209 5.184 355.0 20250210 1.263 356.3 20250211 4.829 361.1 20250212 9.566 370.7 20250213 7.004 377.7 20250214 1.653 379.3 20250215 2.118 381.5 20250216 3.509 385.0 20250217 0.971 385.9 20250218 0.460 386.4 20250219 1.937 388.3 20250220 2.020 390.4 20250221 0.814 391.2 20250222 0.945 392.1 20250223 0.430 392.5 20250224 0.994 393.5 20250225 2.452 396.0 20250226 2.678 398.7 20250227 3.296 402.0 20250228 6.755 408.7 20250301 3.929 412.7 20250302 4.831 417.5 20250303 1.795 419.3 20250304 2.388 421.7 20250305 1.965 423.6 20250306 1.248 424.9 20250307 0.216 425.1 20250308 2.840 427.9 20250309 4.944 432.9 20250310 4.176 437.1 20250311 5.177 442.2 20250312 2.385 444.6 20250313 3.660 448.3 20250314 4.836 453.1 20250315 4.721 457.8 20250316 8.051 465.9 20250317 2.237 468.1 20250326 0.675 486.3 20250327 0.542 486.9 20250328 0.616 487.5 20250329 0.554 488.0 20250330 0.700 488.7 20250210 1.264 356.3 20250208 1.259 349.8 20250209 5.185 355.0 20250210 1.264 356.3 20250211 4.830 361.1 20250212 9.567 370.7 20250213 7.005 377.7 20250331 0.278 489.0 20250331 0.278 489.0 20250401 0.382 489.4 20250402 0.534 489.9 20250402 0.534 489.9 20250403 2.369 492.3 20250404 5.268 497.6 20250405 5.389 503.0 20250406 4.856 507.8 20250407 1.085 508.9 20250408 7.202 516.1 20250409 6.592 522.7 20250410 5.422 528.1 20250411 4.266 532.4 20250412 1.200 533.6 20250413 0.577 534.2 20250414 0.259 534.4 20250415 0.335 534.7 20250416 0.396 535.1 20250417 0.438 535.6 20250418 0.469 536.1 20250419 0.520 536.6 20250420 0.767 537.3 20250421 0.493 537.8 20250422 0.039 537.9 20250423 0.390 538.3 20250423 0.387 538.3 20250424 1.481 539.7 20250425 1.814 541.6 20250426 1.692 543.2 20250427 1.819 545.1 20250428 2.901 548.0 20250429 2.978 550.9 20250430 2.225 553.2 20250501 2.134 555.3 20250502 1.260 556.6 20250503 3.638 560.2 20250504 2.608 562.8 20250505 4.573 567.4 20250506 2.486 569.9 20250507 5.104 575.0 20250508 3.370 578.3 20250509 2.277 580.6 20250510 2.207 582.8 20250511 1.968 584.8 20250512 1.653 586.4 20250513 3.486 589.9 20250514 3.383 593.3 20250515 3.211 596.5 20250516 4.361 600.9 20250517 5.634 606.5 20250518 4.229 610.8 20250519 0.863 611.6 20250520 1.363 613.0 20250521 0.757 613.7 20250522 2.056 615.8 20250523 3.602 619.4 20250524 2.283 621.7 20250525 1.461 623.1 20250526 -0.115 623.0 20250527 -0.145 622.9 20250528 0.896 623.8 20250529 0.624 624.4 20250530 -0.042 624.4 20250531 1.615 626.0 20250601 3.406 629.4 20250602 -0.070 629.3 20250603 -0.673 628.6 20250604 -0.676 628.0 20250605 0.256 628.2 20250606 0.522 628.7 20250607 0.554 629.3 20250608 0.881 630.2 20250609 0.492 630.7 20250610 -0.596 630.1 20250611 0.130 630.2 20250612 1.479 631.7 20250613 1.431 633.1 20250614 0.953 634.1 20250615 -1.004 633.1 20250616 -1.080 632.0 20250617 -1.098 630.9 20250618 -0.939 629.9 20250619 -1.980 628.0 20250620 -2.412 625.5 20250621 -2.132 623.4 20250622 -2.781 620.6 20250623 -2.819 617.8 20250624 -2.470 615.3 20250625 -1.388 614.0 20250626 -1.146 612.8 20250627 -1.577 611.2 20250628 -1.147 610.1 20250629 -1.679 608.4 20250630 -0.988 607.4 20250701 -0.302 607.1 20250702 -2.083 605.0