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) 20210901 0.203 0.2 20210902 2.705 2.9 20210903 0.694 3.6 20210904 0.759 4.4 20210905 3.293 7.7 20210906 0.794 8.4 20210907 1.893 10.3 20210908 2.824 13.2 20210909 2.481 15.6 20210910 1.985 17.6 20210911 2.015 19.6 20210912 9.516 29.2 20210913 7.709 36.9 20210914 3.411 40.3 20210915 1.848 42.1 20210916 1.306 43.4 20210917 1.501 44.9 20210918 2.225 47.2 20210919 0.511 47.7 20210920 0.095 47.8 20210921 1.008 48.8 20210922 2.149 50.9 20210923 0.944 51.9 20210924 0.645 52.5 20210925 0.366 52.9 20210926 0.465 53.3 20210927 0.435 53.8 20210928 0.328 54.1 20210929 0.999 55.1 20210930 0.912 56.0 20211001 2.877 58.9 20211002 1.251 60.1 20211003 0.448 60.6 20211004 0.484 61.1 20211005 0.587 61.7 20211006 0.166 61.8 20211007 -0.025 61.8 20211008 -0.092 61.7 20211009 0.157 61.9 20211010 2.305 64.2 20211011 2.792 67.0 20211012 2.582 69.6 20211013 0.939 70.5 20211014 5.790 76.3 20211015 1.603 77.9 20211016 0.529 78.4 20211017 0.502 78.9 20211018 0.623 79.5 20211019 0.485 80.0 20211020 3.563 83.6 20211021 1.712 85.3 20211022 1.497 86.8 20211023 2.428 89.2 20211024 3.846 93.1 20211025 3.555 96.6 20211026 1.449 98.1 20211027 1.510 99.6 20211028 0.988 100.6 20211029 0.956 101.5 20211030 1.030 102.6 20211031 3.744 106.3 20211101 2.652 109.0 20211102 4.309 113.3 20211103 5.337 118.6 20211104 2.820 121.4 20211105 0.568 122.0 20211106 0.391 122.4 20211107 0.552 122.9 20211108 0.689 123.6 20211109 0.652 124.3 20211110 0.911 125.2 20211111 1.150 126.3 20211112 0.627 127.0 20211113 2.623 129.6 20211114 5.532 135.1 20211115 2.410 137.5 20211116 1.643 139.2 20211117 0.581 139.7 20211118 0.787 140.5 20211119 0.536 141.1 20211120 4.789 145.9 20211121 3.525 149.4 20211122 1.925 151.3 20211123 0.484 151.8 20211124 7.958 159.8 20211125 3.870 163.6 20211126 5.877 169.5 20211127 5.530 175.0 20211128 4.687 179.7 20211129 3.999 183.7 20211130 2.689 186.4 20211201 6.809 193.2 20211202 4.597 197.8 20211203 1.919 199.7 20211204 3.897 203.6 20211205 9.023 212.6 20211206 4.118 216.8 20211207 1.896 218.7 20211208 3.693 222.4 20211209 2.245 224.6 20211210 1.071 225.7 20211211 2.524 228.2 20211212 3.500 231.7 20211213 2.427 234.1 20211214 1.774 235.9 20211215 0.402 236.3 20211216 2.437 238.7 20211217 1.274 240.0 20211218 2.048 242.1 20211219 3.249 245.3 20211220 1.388 246.7 20211221 2.030 248.7 20211222 1.056 249.8 20211223 -0.083 249.7 20211224 0.654 250.4 20211225 0.458 250.8 20211226 0.831 251.6 20211227 0.172 251.8 20211228 -0.038 251.8 20211229 0.116 251.9 20211230 0.373 252.3 20211231 0.110 252.4 20220101 -0.032 252.3 20220102 0.214 252.6 20220103 1.730 254.3 20220104 5.434 259.7 20220105 4.606 264.3 20220106 5.283 269.6 20220107 4.900 274.5 20220108 2.543 277.1 20220109 4.809 281.9 20220110 3.768 285.6 20220111 2.402 288.0 20220112 2.067 290.1 20220113 1.036 291.1 20220114 0.707 291.8 20220115 1.539 293.4 20220116 5.053 298.4 20220117 3.214 301.6 20220118 0.609 302.3 20220119 4.895 307.2 20220120 9.804 317.0 20220121 7.492 324.4 20220122 2.988 327.4 20220123 0.788 328.2 20220124 0.969 329.2 20220125 1.746 330.9 20220126 1.126 332.1 20220127 1.270 333.3 20220128 0.327 333.7 20220129 1.615 335.3 20220130 1.095 336.4 20220131 2.883 339.3 20220201 0.664 339.9 20220202 0.562 340.5 20220203 0.803 341.3 20220204 2.701 344.0 20220205 1.530 345.5 20220206 1.995 347.5 20220207 2.370 349.9 20220208 0.338 350.2 20220209 0.456 350.7 20220210 1.237 351.9 20220211 0.448 352.4 20220212 2.126 354.5 20220213 1.986 356.5 20220214 3.305 359.8 20220215 4.625 364.4 20220216 4.911 369.3 20220217 2.724 372.0 20220218 2.020 374.1 20220219 2.163 376.2 20220220 0.785 377.0 20220221 1.573 378.6 20220222 2.126 380.7 20220223 0.904 381.6 20220224 0.874 382.5 20220225 2.399 384.9 20220226 1.887 386.8 20220227 2.074 388.8 20220228 2.168 391.0 20220301 1.278 392.3 20220302 5.130 397.4 20220303 3.836 401.3 20220304 1.840 403.1 20220305 7.194 410.3 20220306 3.542 413.8 20220307 2.316 416.1 20220308 1.246 417.4 20220309 2.246 419.6 20220310 1.720 421.4 20220311 4.180 425.5 20220312 5.994 431.5 20220313 4.419 435.9 20220314 10.141 446.1 20220315 5.601 451.7 20220316 2.085 453.8 20220317 1.085 454.9 20220318 0.930 455.8 20220319 0.423 456.2 20220320 0.247 456.5 20220321 0.109 456.6 20220322 0.102 456.7 20220323 0.523 457.2 20220324 -0.008 457.2 20220325 0.715 457.9 20220326 1.175 459.1 20220327 1.052 460.1 20220328 1.107 461.2 20220329 1.725 463.0 20220330 1.488 464.4 20220331 1.132 465.6 20220401 1.668 467.2 20220402 3.485 470.7 20220403 1.525 472.3 20220404 0.275 472.5 20220405 0.439 473.0 20220406 1.375 474.3 20220407 1.377 475.7 20220408 0.860 476.6 20220409 0.633 477.2 20220410 0.255 477.5 20220411 0.526 478.0 20220412 0.625 478.6 20220413 1.408 480.0 20220414 1.682 481.7 20220415 4.445 486.2 20220416 3.781 489.9 20220417 0.980 490.9 20220418 1.364 492.3 20220419 2.672 495.0 20220420 0.874 495.8 20220421 4.982 500.8 20220422 4.529 505.3 20220423 1.656 507.0 20220424 1.371 508.4 20220425 1.102 509.5 20220426 0.783 510.2 20220427 2.421 512.7 20220428 3.348 516.0 20220429 3.256 519.3 20220430 1.576 520.9 20220501 0.202 521.1 20220502 0.082 521.1 20220503 1.002 522.1 20220504 0.805 522.9 20220505 0.493 523.4 20220506 1.174 524.6 20220507 0.328 524.9 20220508 0.577 525.5 20220509 0.365 525.9 20220510 1.883 527.8 20220511 1.095 528.9 20220512 1.462 530.3 20220513 0.132 530.5 20220514 -0.022 530.4 20220515 0.646 531.1 20220516 2.079 533.2 20220517 1.124 534.3 20220518 0.695 535.0 20220519 1.018 536.0 20220520 0.596 536.6 20220521 -0.330 536.3 20220522 2.901 539.2 20220523 3.163 542.3 20220524 1.127 543.4 20220525 0.524 544.0 20220526 0.321 544.3 20220527 0.505 544.8 20220528 4.928 549.7 20220529 5.301 555.0 20220530 2.176 557.2 20220531 3.004 560.2 20220601 0.906 561.1 20220602 1.419 562.5 20220603 1.483 564.0 20220604 1.164 565.2 20220605 1.927 567.1 20220606 0.311 567.4 20220607 -0.235 567.2 20220608 0.398 567.6 20220609 1.469 569.0 20220610 0.951 570.0 20220611 0.228 570.2 20220612 1.780 572.0 20220613 1.949 574.0 20220614 4.291 578.2 20220615 2.010 580.3 20220616 1.223 581.5 20220617 1.991 583.5 20220618 6.580 590.1 20220619 2.400 592.5 20220620 0.427 592.9 20220621 1.261 594.1 20220622 2.615 596.8 20220623 0.074 596.8 20220624 -0.386 596.4