ATLAS Sturm and others Snow Water Equivalence (SWE) data was taken each time we visited Ivotuk. Generally we measured SWE at the corners of the four vegetation type grids and sometimes along one or more of the longer transects Measurements were made with a Federal sampler having a cross sample area of 11.045 cm2. Samples were placed in plastic bags and weighed on a digital balance to +- 0.1g. Depths were measured with a probe to +- 0.5cm "Depths in cm, weight in g, density in g/cm3, SWE in cm " Locations of the vegetation grid corners: Corner UTM Northing UTM Easting Elevation Latitude Longitude Site1 NWcor 7599743.036 387734.621 546.489 68.48771087 155.7440758 Site1 NE cor 7599758.336 387833.362 540.74 68.48788736 155.7416823 Site1 SWcor 7599644.839 387750.757 543.267 68.48683761 155.7435751 Site1 SEcor 7599660.579 387848.686 539.857 68.48701771 155.741202 Site2 NWcor 7598812.964 387927.008 549.42 68.47945555 155.7383699 Site2 NEcor 7598753.795 388008.506 542.776 68.47895796 155.7363172 Site2 SWcor 7598729.911 387869.489 545.651 68.47868858 155.7396831 Site2 SWcor 7598673.349 387949.91 544.797 68.47821393 155.7376595 Site3 NWcor 7598875.65 388020.009 550.739 68.48005419 155.7361687 Site3 NEcor 7598816.596 388101.974 541.601 68.47955778 155.7341048 Site3 SWcor 7598793.487 387963 549.817 68.47929541 155.7374705 Site3 SEcor 7598736.106 388043.428 541.444 68.4788134 155.735446 Site4 NWcor 7598928.286 387696.379 552.839 68.48039664 155.7441224 Site4 NEcor 7598955.703 387761.573 551.567 68.48066829 155.7425615 Site4 SWcor 7598900.268 387631.042 557.78 68.48011953 155.7456862 Site4 SEcor 7598863.611 387724.173 554.276 68.47982835 155.7433739 Site 1: Shrubby tussock tundra grid Site 2: Willow/Shrub grid (contains three vegetation transects) Site 3: Moist non-acidic tundra grid Site 4: Mossy tundra grid Transects: Outhouse to Otuk line: (14 may 99) Start 387387.93 7599116.43 520.97 End 388798.11 7598728.10 488.00 Outhouse to Otuk stake line locations Stake name Distance from Outhouse end OO-1 38.719 OO-1A 61.367 OO-2 85.73 OO-2A 110.69 OO-3 OO-3A 178.538 OO-4 212.836 OO-5 298.688 OO-6 380.874 OO-7 448.841 OO-8 521.784 OO-9 587.045 OO-10 655.418 OO-11 722.963 OO-12 774.627 OO-13 796.182 OO-14 833.009 OO-15 888.433 OO-16 962.388 OO-17 1026.38 OO-18 1073.13 OO-19 1132.69 OO-19A 1168.92 OO-20 1196.86 OO-21 1248.15 OO-22 1294.59 OO-23 1336.61 OO-24 1379.01 OO-25 1442.84 OO-26 OO-27 1451.23 Outhouse to Iteriak: (21mar99) 387391.113 7599118.681 520.428 383645.418 7599276.811 508.065 SE lake line: (17 may 2000) 387389.64 7599116.79 521.94 390682.62 7594202.45 596.5 Kucher Creek Post locations (Nov 18 1998) UTM Easting Northing Elevation Post 395898.862 7617924.426 391.005 Kucher8 395874.706 7618044.446 393.202 Kucher7 395863.325 7618101.998 391.767 Kucher6 395859.867 7618120.695 392.539 Kucher5 395841.498 7618215.177 393.465 Kucher4 395823.506 7618306.944 391.602 Kucher3 395800.061 7618426.538 389.254 Kucher2 395759.567 7618631.984 391.537 Kucher1