Greenland Ice Sheet, mass balance, CryoSat‐2, GRACE, altimetry, Climate change, Ice, Global warming, Sea level, Glaciation, Climate, Correlation, High resolution, Monthly, Balances (scales), Bias, Variability, Spatial discrimination, Altimeters, Properties, Airborne sensing, Elevation, Annual, Evolution, Temporal resolution, Modelling, Records, Aid, Fluctuat...