Glacier Bed Topography version 2 IIT Bombay (GlabTop2_IITB)
Glacier Bed Topography (GlabTop2_IITB) is an independently implemented GlabTop2 ice thickness model based on the concept of Shallow Ice Approximation (SIA) and the assumption of perfect plasticity. To estimate glacier ice thickness, this model approach requires only the Digital Elevation Model (DEM), surface Slope, and glacier Mask. The GlabTop2_IITB version includes a graphical user interface (GUI) written in the MATLAB programming language. The GUI was designed with the goal of making it usable by people who are not programmers. In addition, a simple method is proposed for estimating an optimal/near-optimal model parameterization of shape factor, which is one of the model inputs. The proposed glacier parametrization method was validated using field measurements, which demonstrated its robustness on glaciers lacking field ice thickness measurements. Overall, the GlabTop2_IITB version is semi-automated, features novel shape factor parametrization, and is applicable to any valley glacier.
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