Auxiliary material for this article contains a text file describing the scaling method used to estimate discharge from measurements at the glacier centerline, a table, and seven figures.

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grl28119-sup-0001-readme.txtplain text document4Kreadme.txt
grl28119-sup-0002-txts01.txtplain text document2KText S1. Description of scaling method used to estimate discharge from measurements at the glacier centerline.
grl28119-sup-0003-ts01.txtplain text document1KTable S1. Flux gate discharge and centerline scaling parameters for each glacier.
grl28119-sup-0004-fs01.tifTIFF image698KFigure S1. Profiles of Helheim Glacier average summer flowspeed and surface and bed elevation for the fluxgate shown in Figure 1.
grl28119-sup-0005-fs02.tifTIFF image698KFigure S2. Same as Figure S1 but for Kangerdlugssuaq Glacier.
grl28119-sup-0006-fs03.tifTIFF image698KFigure S3. Same as Figure S1 but for Jakobshavn Isbrae South Branch.
grl28119-sup-0007-fs04.tifTIFF image698KFigure S4. Same as Figure S1 but for Jakobshavn Isbrae Rumple and North Branch.
grl28119-sup-0008-fs05.tifTIFF image568KFigure S5. Helheim Glacier ice flow speed from RIFT and combined InSAR and speckle-tracking methods, ice thickness with observations, ice discharge and mass change, and modeled monthly surface mass balance rate summed over the glacier catchment with 12-month retrospective average.
grl28119-sup-0009-fs06.tifTIFF image563KFigure S6. Same as Figure S5 but for Kangerdlugssuaq Glacier.
grl28119-sup-0010-fs07.tifTIFF image573KFigure S7. Same as Figure S5 but for Jakobshavn Isbrae.

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