Text S1: Supplemental
background
Text S2: Field collection and data processing of Acoustic Doppler
Current Profiler (ADCP) supraglacial river discharge measurements
Text S3: Description of variables for full-resolution ADCP datafiles
Text S4: Field collection and data processing of GPS ice surface motion
measurements
Text S5: PROMICE KAN_M Automated Weather Station data and processing
Text S6: Proglacial river discharge data and processing
Text S7: Computation of subglacial water storage (S) and subglacial
water storage change (ΔS) proxies
Text S8: Supplemental discussion of ΔS and ice motion
Figure S1: Photograph 1 of ADCP discharge monitoring site
Figure S2: Photograph 2 of ADCP discharge monitoring site
Figure S3: Photograph 3 of ADCP discharge monitoring site
Figure S4: Photograph 4 of ADCP discharge monitoring site
Figure S5: Hourly time-series plot of ADCP supraglacial river discharge
Figure S6: Photograph of GPS data collection site
Figure S7: Correlations between calculated storage proxies and ice
motion
Table S1: Summary table of hourly ADCP supraglacial river discharge
measurements
Table S2: Summary table of minimum, maximum and diurnal range of
supraglacial river discharge measurements for each calendar day