Articles | Volume 14, issue 8
Geosci. Model Dev., 14, 5107–5124, 2021
Geosci. Model Dev., 14, 5107–5124, 2021

Development and technical paper 17 Aug 2021

Development and technical paper | 17 Aug 2021

An iterative process for efficient optimisation of parameters in geoscientific models: a demonstration using the Parallel Ice Sheet Model (PISM) version 0.7.3

Steven J. Phipps et al.

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Cited articles

Albrecht, T., Martin, M., Haseloff, M., Winkelmann, R., and Levermann, A.: Parameterization for subgrid-scale motion of ice-shelf calving fronts, The Cryosphere, 5, 35–44,, 2011. a
Albrecht, T., Aschwanden, A., Brown, J., Bueler, E., DellaGiustina, D., Feldman, J., Fischer, B., Habermann, M., Haseloff, M., Hock, R., Khroulev, C., Levermann, A., Lingle, C., Martin, M., Mengel, M., Maxwell, D., van Pelt, W., Seguinot, J., Winkelmann, R., and Ziemen, F.: PISM User's Manual, manual date 30 June 2015, based on PISM revision stable v0.7.1-2-g79b8840, 2015. a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p
An, M., Wiens, D. A., Zhao, Y., Feng, M., Nyblade, A., Kanao, M., Li, Y., Maggi, A., and Lévêque, J.: Temperature, lithosphere-asthenosphere boundary, and heat flux beneath the Antarctic Plate inferred from seismic velocities, J. Geophys. Res.-Sol. Ea., 120, 8720–8742,, 2015. a
Aschwanden, A. and Blatter, H.: Mathematical modeling and numerical simulation of polythermal glaciers, J. Geophys. Res., 114, F01027,, 2009. a
Aschwanden, A., Bueler, E., Khroulev, C., and Blatter, H.: An enthalpy formulation for glaciers and ice sheets, J. Glaciol., 58, 441–457,, 2012. a, b
Short summary
Simplified schemes, known as parameterisations, are sometimes used to describe physical processes within numerical models. However, the values of the parameters are uncertain. This introduces uncertainty into the model outputs. We develop a simple approach to identify plausible ranges for model parameters. Using a model of the Antarctic Ice Sheet, we find that the value of one parameter can depend on the values of others. We conclude that a single optimal set of parameter values does not exist.