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) 20190901 0.677093 0.677093 20190902 0.617531 1.29462 20190903 0.477422 1.77205 20190904 0.622346 2.39439 20190905 0.808487 3.20288 20190906 2.88338 6.08625 20190907 3.7459 9.83215 20190908 1.93806 11.7702 20190909 0.372613 12.1428 20190910 0.617129 12.76 20190911 1.58956 14.3495 20190912 1.02966 15.3792 20190913 2.34006 17.7192 20190914 3.72281 21.4421 20190915 4.07034 25.5124 20190916 2.49402 28.0064 20190917 0.569197 28.5756 20190918 0.193281 28.7689 20190919 0.120693 28.8896 20190920 0.056653 28.9462 20190921 3.27981 32.226 20190922 5.86335 38.0894 20190923 7.98406 46.0734 20190924 5.52101 51.5945 20190925 2.33473 53.9292 20190926 1.17536 55.1045 20190927 0.766862 55.8714 20190928 -0.188585 55.6828 20190929 -0.509851 55.173 20190930 -0.177527 54.9954 20191001 0.686111 55.6816 20191002 2.77589 58.4574 20191003 3.81872 62.2762 20191004 5.05015 67.3263 20191005 6.41548 73.7418 20191006 5.99773 79.7395 20191007 1.77371 81.5132 20191008 0.58243 82.0957 20191009 0.51435 82.61 20191010 0.127301 82.7373 20191011 1.45876 84.1961 20191012 1.68229 85.8784 20191013 2.14526 88.0236 20191014 1.25332 89.2769 20191015 1.66496 90.9419 20191016 1.3476 92.2895 20191017 1.00254 93.292 20191018 2.45577 95.7478 20191019 3.55083 99.2987 20191020 1.61355 100.912 20191021 0.412634 101.325 20191022 0.0928579 101.418 20191023 0.256726 101.674 20191024 0.921499 102.596 20191025 4.16589 106.762 20191026 2.57794 109.34 20191027 1.6581 110.998 20191028 2.0766 113.074 20191029 0.836193 113.911 20191030 1.2135 115.124 20191031 1.63257 116.757 20191101 1.53194 118.289 20191102 0.369359 118.658 20191103 1.04197 119.7 20191104 1.32352 121.023 20191105 2.88668 123.91 20191106 1.87462 125.785 20191107 1.73426 127.519 20191108 4.50726 132.026 20191109 2.82465 134.851 20191110 6.77679 141.628 20191111 5.13672 146.764 20191112 3.80128 150.566 20191113 1.72948 152.295 20191114 10.0083 162.304 20191115 8.86725 171.171 20191116 2.14572 173.317 20191117 3.1139 176.43 20191118 3.29075 179.721 20191119 2.32693 182.048 20191120 2.44948 184.498 20191121 1.11953 185.617 20191122 0.40663 186.024 20191123 0.756267 186.78 20191124 3.65662 190.437 20191125 3.29373 193.73 20191126 3.15658 196.887 20191127 1.81646 198.703 20191128 0.85822 199.562 20191129 2.28845 201.85 20191130 2.40228 204.252 20191201 7.88591 212.138 20191202 6.24272 218.381 20191203 4.2897 222.671 20191204 3.10156 225.772 20191205 1.46496 227.237 20191206 0.659493 227.897 20191207 0.990458 228.887 20191208 0.724462 229.612 20191209 0.336689 229.948 20191210 0.567409 230.516 20191211 0.658419 231.174 20191212 2.0145 233.189 20191213 1.04704 234.236 20191214 1.38565 235.621 20191215 1.1867 236.808 20191216 0.685812 237.494 20191217 0.83139 238.325 20191218 -0.00873338 238.317 20191219 -0.00632976 238.31 20191220 0.417451 238.728 20191221 1.27698 240.005 20191222 0.986365 240.991 20191223 0.518107 241.509 20191224 0.144283 241.653 20191225 0.26418 241.918 20191226 0.276889 242.194 20191227 0.23973 242.434 20191228 1.2138 243.648 20191229 1.3915 245.039 20191230 1.71285 246.752 20191231 1.61189 248.364 20200101 0.995981 249.36 20200102 1.25471 250.615 20200103 1.22174 251.837 20200104 2.31779 254.154 20200105 1.87233 256.027 20200106 2.87778 258.905 20200107 3.91413 262.819 20200108 4.0269 266.846 20200109 4.28523 271.131 20200110 1.23824 272.369 20200111 0.940656 273.31 20200112 1.35398 274.664 20200113 0.842084 275.506 20200114 0.260006 275.766 20200115 0.130824 275.897 20200116 1.03305 276.93 20200117 2.3171 279.247 20200118 1.36464 280.611 20200119 4.80376 285.415 20200120 1.65584 287.071 20200121 2.44612 289.517 20200122 5.17596 294.693 20200123 2.73221 297.425 20200124 1.724 299.149 20200125 1.36847 300.518 20200126 1.53967 302.057 20200127 1.22413 303.281 20200128 1.03639 304.318 20200129 1.94639 306.264 20200130 2.00066 308.265 20200131 1.96341 310.228 20200201 1.45611 311.684 20200202 0.629669 312.314 20200203 0.494781 312.809 20200204 2.01422 314.823 20200205 2.11907 316.942 20200206 6.95778 323.9 20200207 2.47685 326.377 20200208 6.45805 332.835 20200209 2.53927 335.374 20200210 0.757893 336.132 20200211 1.27952 337.412 20200212 1.68549 339.097 20200213 2.08825 341.185 20200214 2.06751 343.253 20200215 1.56977 344.823 20200216 0.867444 345.69 20200217 1.40454 347.095 20200218 1.6166 348.711 20200219 1.01754 349.729 20200220 0.350167 350.079 20200221 0.313962 350.393 20200222 0.455823 350.849 20200223 0.666124 351.515 20200224 0.293784 351.809 20200225 0.119299 351.928 20200226 0.12535 352.053 20200227 0.492065 352.545 20200228 0.157028 352.702 20200229 0.433735 353.136 20200301 2.26547 355.402 20200302 5.3304 360.732 20200303 4.1269 364.859 20200304 0.892932 365.752 20200305 0.236013 365.988 20200306 0.814723 366.802 20200307 0.760191 367.563 20200308 0.943021 368.506 20200309 1.71878 370.224 20200310 1.362 371.586 20200311 0.217947 371.804 20200312 0.362603 372.167 20200313 0.471659 372.639 20200314 0.405832 373.045 20200315 0.834197 373.879 20200316 0.291241 374.17 20200317 0.177752 374.348 20200318 0.27393 374.622 20200319 3.07886 377.701 20200320 3.65151 381.352 20200321 1.07518 382.427 20200322 0.492918 382.92 20200323 0.342709 383.263 20200324 0.456755 383.72 20200325 1.42259 385.142 20200326 0.896396 386.039 20200327 1.18773 387.226 20200328 6.06756 393.294 20200329 9.63855 402.932 20200330 4.08771 407.02 20200331 1.28692 408.307 20200401 0.644116 408.951 20200402 1.62781 410.579 20200403 0.991415 411.57 20200404 1.60263 413.173 20200405 1.54802 414.721 20200406 0.872402 415.593 20200407 0.62898 416.222 20200408 0.543951 416.766 20200409 0.356764 417.123 20200410 0.408823 417.532 20200411 -0.191638 417.34 20200412 5.39875 422.739 20200413 6.18986 428.929 20200414 2.16137 431.09 20200415 1.08464 432.175 20200416 3.68807 435.863 20200417 7.67304 443.536 20200418 6.631 450.2 20200419 1.714 451.9 20200420 2.676 454.6 20200421 4.259 458.8 20200422 3.040 461.9 20200423 2.589 464.4 20200424 0.174 464.6 20200425 1.905 466.5 20200426 1.389 467.9 20200427 4.193 472.1 20200428 3.105 475.2 20200429 0.294 475.5 20200430 0.846 476.3 20200501 1.056 477.4 20200502 1.906 479.3 20200503 5.937 485.2 20200504 3.111 488.4 20200505 0.765 489.1 20200506 0.875 490.0 20200507 0.549 490.5 20200508 0.286 490.8 20200509 0.527 491.4 20200510 1.460 492.8 20200511 1.562 494.4 20200512 1.567 496.0 20200513 0.428 496.4 20200514 0.459 496.8 20200515 0.369 497.2 20200516 0.002 497.2 20200517 -0.123 497.1 20200518 -0.216 496.9 20200519 -0.400 496.5 20200520 -0.512 496.0 20200521 0.319 496.3 20200522 0.514 496.8 20200523 0.708 497.5 20200524 -0.023 497.5 20200525 0.529 498.0 20200526 1.058 499.1 20200527 0.663 499.7 20200528 0.522 500.2 20200529 2.345 502.6 20200530 3.054 505.6 20200531 0.214 505.9 20200601 -0.429 505.4 20200602 1.821 507.3 20200603 4.181 511.4 20200604 0.413 511.8 20200605 1.444 513.3 20200606 1.500 514.8 20200607 0.726 515.5 20200608 1.039 516.6 20200609 -0.003 516.6 20200610 4.691 521.2 20200611 3.466 524.7 20200612 3.259 528.0 20200613 2.369 530.3 20200614 2.611 532.9 20200615 2.288 535.2 20200616 1.523 536.8 20200617 -1.052 535.7 20200618 0.213 535.9 20200619 -0.216 535.7 20200620 -1.490 534.2 20200621 -0.610 533.6 20200622 -3.146 530.5 20200623 -1.324 529.1 20200624 -2.173 527.0 20200625 -2.934 524.0 20200626 -3.627 520.4 20200627 -4.068 516.3 20200628 -2.228 514.1 20200629 -2.040 512.1 20200630 -3.712 508.4 20200701 -5.586 502.8 20200702 -4.360 498.4 20200703 -5.008 493.4 20200704 -4.128 489.3 20200705 -4.753 484.5 20200706 -5.422 479.1 20200707 -5.678 473.4 20200708 -5.826 467.6 20200709 -3.606 464.0 20200710 -1.970 462.0 20200711 -4.406 457.6 20200712 -3.536 454.1 20200713 -4.189 449.9 20200714 -4.570 445.3 20200715 -5.579 439.7 20200716 -6.156 433.6 20200717 -6.575 427.0 20200718 -5.719 421.3 20200719 -4.768 416.5 20200720 -5.407 411.1 20200721 -6.794 404.3 20200722 -7.331 397.0 20200723 -6.793 390.2 20200724 -4.966 385.2 20200725 -2.204 383.0 20200726 -2.050 381.0 20200727 -2.867 378.1 20200728 -1.840 376.3 20200729 -4.284 372.0 20200730 -4.851 367.1 20200731 -4.533 362.6 20200801 -1.850 360.7 20200802 -2.514 358.2 20200803 -3.121 355.1 20200804 -2.299 352.8 20200805 -1.999 350.8 20200806 -1.573 349.2 20200807 -0.181 349.1 20200808 -0.114 348.9 20200809 0.840 349.8 20200810 4.000 353.8 20200811 2.281 356.1 20200812 5.359 361.4 20200813 1.349 362.8 20200814 0.163 362.9 20200815 -1.358 361.6 20200816 0.650 362.2 20200817 -2.519 359.7 20200818 -3.834 355.9 20200819 -2.898 353.0 20200820 -3.462 349.5 20200821 -3.540 346.0 20200822 -2.803 343.2 20200823 -0.813 342.4 20200824 -0.409 342.0 20200825 1.302 343.3 20200826 2.346 345.6 20200827 1.406 347.0 20200828 0.673 347.7 20200829 3.116 350.8 20200830 -0.572 350.2 20200831 -0.533 349.7