---------------------------------------------------------------------------- PARTITIONING OF ICE DISCHARGE ESTIMATES AND ASSOCIATED UNCERTAINTIES FOR SPI ---------------------------------------------------------------------------- AUTHOR: Johannes J. Fürst, johannes.fuerst@fau.de DATE: 21.11.2023 VERSION: 1.0.0 ---------------------------------------------------------------------------- NOTES ---------------------------------------------------------------------------- For details of the flux gate computation refer to Fürst et al. (2023). - Ice velocities are inferred from surface information as provided by Mouginot and Rignot (2015) - Apparent mass balance (AMB) is computed as the difference between the surface mass balance field from Schaefer et al. (2015) and DEM differencing of 2011/2016 TDX (Malz et al., 2018, Braun et al., 2019) and SRTM 2000 (Farr et al., 2007). - Frontal ice discharge values were computed as the difference between the flux-gate discharge and the AMB integrated downglacier (trunk AMB). Flux-gate discharge was computed pixelwise so values differ from a pure multiplication of gate width with average gate thickness and average gate speed. - FG Frontal Discharge values are computed using the flux-gate method in this study (Fuerst et al., 2023). - MB Frontal Discharge values are computed by integrating the AMB over the RGI drainage basins. ---------------------------------------------------------------------------- REFERENCES ---------------------------------------------------------------------------- Fürst et al. (2023) 'The Foundations of the Patagonian Icefields', Communications Earth & Environment. ---------------------------------------------------------------------------- DATA TABLE ---------------------------------------------------------------------------- Names FG Frontal Discharge MB Frontal Discharge Trunk AMB Trunk AMB Unc. Gate Width Gate Thickness Gate Thickness Unc. Gate Speed Gate Speed Unc. Names [km3/yr] [km3/yr] [km3/yr] [km3/yr] [m] [m] [m] [m/yr] [m/yr] Jorge Montt 1.9397 2.5456 -0.0353 0.0044 3692.6 225.6 67.6 1723.9 52.0 Ofhidro 0.0012 0.0981 -0.0133 0.0015 1264.6 116.6 16.7 96.8 52.0 Bernardo 0.2104 2.3201 -0.0463 0.0064 4227.2 261.8 196.3 207.6 52.0 Témpano 0.1010 0.5438 -0.0432 0.0052 3662.9 158.4 51.8 211.7 52.0 Occidental 0.0773 -0.6267 -0.0262 0.0020 2225.9 268.5 325.6 162.9 52.0 Greve 0.5133 1.0151 -0.0347 0.0031 5182.5 174.7 179.9 592.7 52.0 Pio XI 1.4757 4.1721 -0.3541 0.0215 14205.9 207.7 53.4 572.8 52.0 HPS 12 0.5205 1.2955 -0.0116 0.0026 1602.2 361.1 233.6 681.6 52.0 HPS 13 2.3464 2.4743 -0.0113 0.0087 11354.3 221.1 182.9 612.9 52.0 HPS 15 0.3920 0.6857 -0.0233 0.0036 8933.4 108.5 217.6 366.2 52.0 HPS 19 0.4761 1.2031 -0.0121 0.0013 2773.1 126.0 7.2 979.5 52.0 Penguin 2.1258 4.1210 -0.0550 0.0079 26810.9 231.8 89.1 240.1 52.0 Europa 0.9953 2.4137 -0.0189 0.0025 3486.0 97.4 76.0 3024.9 52.0 Guilardi -0.0054 0.2579 -0.0168 0.0018 1110.5 138.1 41.3 71.9 52.0 HPS 31 0.1861 1.1564 -0.0274 0.0032 3291.7 125.1 67.0 482.8 52.0 Calvo 0.1376 1.1575 -0.0135 0.0019 10449.4 116.0 14.9 126.3 52.0 HPS 34 0.2240 1.4811 -0.0353 0.0044 5882.6 123.8 32.9 309.2 52.0 Asia 0.0819 0.3426 -0.0233 0.0030 2746.1 102.2 20.3 394.1 52.0 Amalia 0.0844 0.9273 -0.0305 0.0048 1778.5 103.5 39.4 600.4 52.0 Tyndall 0.2606 1.2064 -0.0156 0.0014 3023.7 305.8 205.3 232.1 52.0 Grey & Dickson 0.2056 1.6091 -0.0687 0.0071 7167.5 141.8 70.1 263.1 52.0 Perito Moreno 0.3657 1.0871 -0.0265 0.0017 4143.0 269.3 61.3 305.4 52.0 Spegazzini 0.0533 0.4019 -0.0085 0.0006 3592.7 135.8 42.4 134.8 52.0 Upsala & Cono 2.0311 4.2254 -0.0233 0.0017 3039.4 512.0 278.1 1062.4 52.0 Viedma 0.3723 1.9762 -0.0345 0.0022 3990.2 349.7 115.1 251.0 52.0 Chico 0.0166 -0.1003 -0.0235 0.0022 1940.5 123.9 18.2 163.8 52.0 O'Higgins 0.7316 2.3577 -0.0269 0.0022 2500.5 195.2 47.5 1247.0 52.0 Lucia 0.0434 0.2935 -0.0130 0.0010 1903.7 134.0 78.0 202.8 52.0 RGI60-17.05889 -0.0028 0.0275 -0.0034 0.0005 902.1 80.3 3.3 8.8 52.0 RGI60-17.05796 0.0266 0.1456 -0.0063 0.0010 3549.9 90.2 4.2 96.9 52.0 RGI60-17.05363 -0.0005 0.0084 -0.0040 0.0005 570.1 82.8 2.8 81.4 52.0 HPS 8 -0.0069 0.0414 -0.0086 0.0012 943.0 117.1 6.2 14.2 52.0 HPS 9 0.0202 0.2226 -0.0429 0.0046 2104.9 243.4 314.6 106.9 52.0 HPS 10 0.0140 0.2555 -0.0093 0.0009 1330.7 187.2 56.4 86.6 52.0 RGI60-17.05028 -0.0028 0.0446 -0.0046 0.0006 1923.9 87.1 2.4 11.5 52.0 RGI60-17.04991 -0.0019 0.0521 -0.0025 0.0003 503.6 82.7 46.7 12.9 52.0 RGI60-17.04995 -0.0033 0.0135 -0.0082 0.0009 2252.3 83.8 79.9 22.4 52.0 RGI60-17.04993 -0.0003 0.0079 -0.0030 0.0004 1435.5 108.1 3.3 19.2 52.0 RGI60-17.04982 0.0114 0.3001 -0.0139 0.0016 4303.3 131.8 18.1 43.2 52.0 RGI60-17.04963 0.0141 0.2396 -0.0072 0.0011 4268.7 110.7 14.9 51.0 52.0 RGI60-17.04926 0.0005 0.0604 -0.0042 0.0005 1156.5 135.8 325.6 29.5 52.0 RGI60-17.04904 -0.0032 0.0599 -0.0129 0.0027 1170.4 83.1 6.9 100.4 52.0 RGI60-17.04901 -0.0026 0.0103 -0.0037 0.0004 408.2 93.5 1.7 30.2 52.0 RGI60-17.04910 -0.0026 -0.0085 -0.0050 0.0005 724.9 95.8 4.9 38.5 52.0 RGI60-17.04909 -0.0009 0.0174 -0.0012 0.0001 206.6 98.8 0.0 14.3 52.0 RGI60-17.04915 -0.0030 0.1696 -0.0047 0.0005 727.5 102.4 13.8 25.4 52.0 HPS 28 0.0981 0.2613 -0.0056 0.0006 1367.1 118.7 12.9 765.5 52.0 HPS 29 0.0531 0.4554 -0.0099 0.0010 1525.0 87.5 69.9 534.3 52.0 RGI60-17.04891 -0.0034 0.0061 -0.0043 0.0005 414.6 103.9 52.0 21.2 52.0 RGI60-17.04890 -0.0028 0.0312 -0.0041 0.0005 750.5 126.5 15.4 15.0 52.0 RGI60-17.04884 0.0019 0.0855 -0.0022 0.0002 1972.1 82.0 181.8 28.7 52.0 RGI60-17.04881 0.0008 0.0101 -0.0014 0.0002 1351.6 138.1 2.6 12.8 52.0 RGI60-17.04879 0.0530 0.1013 -0.0055 0.0008 2218.1 95.3 3.2 257.3 52.0 RGI60-17.15792 -0.0020 -0.0186 -0.0027 0.0003 502.7 74.8 12.2 18.2 52.0 RGI60-17.15793 -0.0003 -0.0038 -0.0010 0.0002 837.8 79.9 17.8 10.2 52.0 HPS 38 0.0081 0.1051 -0.0118 0.0029 2769.8 157.7 31.9 50.5 52.0 RGI60-17.04863 -0.0077 0.3122 -0.0083 0.0009 926.9 160.8 7.0 4.2 52.0 HPS 41 0.1164 0.3339 -0.0188 0.0025 1506.3 294.7 20.2 306.4 52.0 Snowy -0.0076 0.0178 -0.0153 0.0030 2000.1 173.7 11.6 22.2 52.0 RGI60-17.04785 -0.0037 0.0894 -0.0059 0.0009 4881.3 111.3 4.6 17.4 52.0 Balmaceda 0.0465 0.1966 -0.0133 0.0017 1862.5 144.1 237.5 218.7 52.0 RGI60-17.04846 0.0014 0.0495 -0.0008 0.0002 1667.7 62.3 14.8 24.1 52.0 Pingo -0.0051 0.3177 -0.0134 0.0013 2255.2 122.5 140.7 33.6 52.0 RGI60-17.04878 0.0063 0.0549 -0.0052 0.0005 907.7 89.0 317.6 129.7 52.0 Frias 0.0110 0.0019 -0.0107 0.0014 1541.1 139.6 8.4 99.0 52.0 Ameghino 0.0215 0.0603 -0.0046 0.0005 1307.7 133.2 31.6 142.8 52.0 Mayo 0.0176 0.1061 -0.0143 0.0011 1350.9 141.4 46.6 163.3 52.0 RGI60-17.04906 -0.0010 -0.0071 -0.0030 0.0003 705.9 130.2 3.5 23.5 52.0 RGI60-17.04916 -0.0019 0.1531 -0.0037 0.0004 521.8 115.5 9.2 29.6 52.0 Seco -0.0017 -0.0086 -0.0022 0.0002 675.6 96.9 1.7 8.7 52.0 Heim -0.0018 -0.0033 -0.0026 0.0003 662.5 98.7 1.0 12.1 52.0 Onelli 0.0206 0.1939 -0.0045 0.0003 1928.0 153.3 6.6 97.6 52.0 Bolados 0.0159 0.1528 -0.0034 0.0002 2135.2 145.3 20.7 98.7 52.0 Agassiz 0.0305 0.2547 -0.0053 0.0004 1853.5 145.0 86.6 154.8 52.0 RGI60-17.04959 -0.0007 0.0435 -0.0049 0.0005 904.4 100.3 5.1 46.8 52.0 RGI60-17.15759 -0.0000 0.0006 -0.0000 0.0000 118.2 71.1 0.3 3.6 52.0 RGI60-17.15761 -0.0000 -0.0004 -0.0001 0.0000 115.0 58.6 0.0 5.2 52.0 RGI60-17.15760 -0.0002 -0.0005 -0.0003 0.0000 266.2 68.8 0.4 5.0 52.0 RGI60-17.05024 -0.0008 -0.0166 -0.0024 0.0003 1430.1 88.2 1.4 12.2 52.0 Grande del Torre -0.0024 -0.0896 -0.0096 0.0010 1636.9 134.9 37.2 32.6 52.0 RGI60-17.05128 -0.0002 -0.0138 -0.0034 0.0005 913.9 112.0 2.8 32.7 52.0 RGI60-17.05140 0.0019 -0.0116 -0.0014 0.0001 830.5 100.9 2.9 39.7 52.0 RGI60-17.05167 0.0016 -0.0153 -0.0015 0.0001 650.6 60.8 94.8 78.6 52.0 RGI60-17.05201 0.0000 -0.0079 -0.0011 0.0002 998.2 74.6 0.6 17.1 52.0 RGI60-17.05338 -0.0043 -0.0477 -0.0129 0.0013 1222.9 146.4 6.8 44.5 52.0 RGI60-17.05505 -0.0040 0.0174 -0.0048 0.0004 629.2 107.6 31.5 11.9 52.0 Bravo 0.0021 0.3245 -0.0106 0.0007 1273.7 162.0 9.6 57.3 52.0 Mellizo Sur 0.0008 0.2032 -0.0192 0.0017 1251.8 90.7 10.0 198.9 52.0 Oriental 0.0110 0.0599 -0.0129 0.0013 1350.4 186.5 17.2 87.0 52.0 RGI60-17.05995 -0.0036 -0.0082 -0.0036 0.0004 315.0 92.1 4.6 3.1 52.0