Glare, a GIS tool to reconstruct the 3D surface of palaeoglaciers

Ramon Pellitero-Ondicol, Brice R Rea, Matteo Spagnolo, Jostein Bakke, Susan Ivy-Ochs, Craig R Frew, Philip Hughes, Adriano Ribolini, Sven Lukas, Hans Renssen

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Abstract

Glacier reconstructions are widely used in palaeoclimatic studies and this paper presents a new semi-automated method for generating glacier reconstructions: GlaRe, is a toolbox coded in Python and operating in ArcGIS. This toolbox provides tools to generate the ice thickness from the bed topography along a palaeoglacier flowline applying the standard flow law for ice, and generates the 3D surface of the palaeoglacier using multiple interpolation methods. The toolbox performance has been evaluated using two extant glaciers, an icefield and a cirque/valley glacier from which the subglacial topography is known, using the basic reconstruction routine in GlaRe. Results in terms of ice surface, ice extent and equilibrium line altitude show excellent agreement that confirms the robustness of this procedure in the reconstruction of palaeoglaciers from glacial landforms such as frontal moraines.
Original languageEnglish
Pages (from-to)77-85
Number of pages9
JournalComputers & Geosciences
Volume94
Early online date11 Jun 2016
DOIs
Publication statusPublished - Sep 2016

Keywords

  • glacier reconstruction
  • flowline equilibrium profile
  • GIS
  • python

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    Pellitero-Ondicol, R., Rea, B. R., Spagnolo, M., Bakke, J., Ivy-Ochs, S., Frew, C. R., Hughes, P., Ribolini, A., Lukas, S., & Renssen, H. (2016). Glare, a GIS tool to reconstruct the 3D surface of palaeoglaciers. Computers & Geosciences, 94, 77-85. https://doi.org/10.1016/j.cageo.2016.06.008