Frontal ablation estimates for 49 tidewater glaciers in Greenland

This dataset contains frontal ablation estimates for 49 tidewater glaciers in Greenland in ESRI shapefile, geopackage and NetCDF format, with the variables being defined as follows:

• Glacier name – Name of each glacier investigated in this study [unitless]
• F – Three-month-average frontal ablation estimates during time intervals [Gt/d]
• F_Uncertainty – three-month-average frontal ablation uncertainty for time intervals [Gt/d]
• F_Max_Uncertainty – Maximum uncertainty over total time period [Gt/d]
• Date – Midpoint of time intervals on which output data is defined [yyyy-mm-dd]
• D – Three-month-average discharge during time intervals [Gt/d]
• D_Uncertainty – Three-month-average discharge uncertainty for time interval [Gt/d]
• TMC – Terminus mass change (dM/dt) during time intervals [Gt/d]
• TMC _Uncertainty – Three-month-average terminus mass change uncertainty during time intervals [Gt/d]
• Rho – Ice density (constant) [kg/km3]
• L – Interpolated terminus change over time (L) [km]
• Delta_L_W – Delineation and terminus width uncertainty (constant) [km]
• H – Mean ice thickness along the centerline (H) [km]
• Delta H – Ice thickness uncertainty with constant ArcticDEM/AeroDEM uncertainties of 0.1 m and 6 m, respectively  [km]
• W – Terminus width (W) [km]
• Bedrock_U – Mean uncertainty in bedrock topography along the centerline [km]
• TI – Time interval over which data are averaged (t2 - t1; 90 days for the results presented here) 

The repository also includes figures for each investigated tidewater glacier to show the calculated frontal ablation estimates in relation with ice flow velocities and terminus positions change. The figures are available in the FA_Img folder.

The frontal ablation estimates have been derived using a processing chain which is described in Fahrner et al. (in prep.). The processing chain and further information can been found at 10.5281/zenodo.8414729. 

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When using this data set please use the citation provided in the repository.

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