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