Documentation for PISM, a parallel Ice Sheet Model

NEWS: PISM's new mass conserving subglacial hydrology models.

The Parallel Ice Sheet Model pism0.6 is an open source, parallel, high-resolution ice sheet model. Features:

  • hierarchy of available stress balances
  • marine ice sheet physics, dynamic calving fronts
  • polythermal, enthalpy-based conservation of energy scheme
  • subglacial hydrology and till model
  • extensible coupling to atmospheric and ocean models
  • inversion toolbox in Python
  • verification and validation tools
  • complete documentation for users and developers
  • uses MPI and PETSc for parallel simulations
  • reads and writes CF-compliant NetCDF

PISM Application of the Month

May 2014

Click the image to go to the Journal of Glaciology page.

Resolution-dependent performance of grounding line motion in a shallow model compared with a full-Stokes model according to the MISMIP3d intercomparison
investigators: J. Feldmann, T. Albrecht, C. Khroulev, F. Pattyn, and A. Levermann
journal: J. Glaciol.

By using MISMIP3d simulations across a range of resolutions, this paper shows that the SIA+SSA hybrid stress balance in PISM can model grounding line motion in a perturbed ice-sheet–shelf system. The key improvements, all included in pism0.6, are: linear interpolation of the grounding line, locally-interpolated basal friction, and an improved driving-stress computation across the grounding line. The reversibility of the grounding line, after a local perturbation of basal resistance comes and goes, is captured by the model even at medium and low horizontal resolutions (> 10 km). The transient model response is qualitatively-similar to that of higher-order models, though with higher sensitivity to perturbations on very short timescales. Our findings support the application of PISM to the Antarctic ice sheet from regional up to continental scales and even at relatively-low spatial resolutions.

2014/04/30 09:19 · Ed Bueler

Latest News

PISM stable0.6 is out

See the stable version page to check out a copy of the PISM stable0.6 source code. If you have already checked out the prerelease version, just do git pull and then make install in your build directory. Send email to help@pism-docs.org for help with any version of PISM.

Changes since stable0.5 include

Basal strength and basal hydrology

Click here to see the list

Marine ice sheet modeling

Click here to see the list

Climate inputs and ocean inputs

Click here to see the list

Inverse modeling tools are a part of this release

Please see the PISM's Python Documentation.

Energy and mass model improvements

Click here to see the list

Improved User's Manual examples

Click here to see the list

Usability

Click here to see the list

Under the hood

Click here to see the list

2014/02/13 18:18 · Constantine Khroulev

The first seven PISM PhDs

Since 2012 there have been seven Ph.D. students who have completed their degrees using PISM as a major tool in their research. The new year is a good time to feature their accomplishments on the PISM front page!

Dr. Torsten Albrecht

A dynamic memory of fracture processes in ice shelves, Ph.D. Potsdam University 2013; advisor A. Levermann; publications including Albrecht et al. (2011) and Albrecht and Levermann (2012); personal webpage

Dr. Marijke Habermann

Basal shear strength inversions for ice sheets with an application to Jakobshavn Isbrae, Greenland, Ph.D. University of Alaska Fairbanks 2013; advisor M. Truffer; publications including Habermann, Truffer, and Maxwell (2013); personal webpage

Dr. Maria Martin

Numerical simulation of the Antarctic ice sheet and its dynamic response to external perturbation, Ph.D. Potsdam University 2012; advisor A. Levermann; publications including Martin et al. (2011); personal webpage

Dr. Ward van Pelt

Modelling the dynamics and boundary processes of Svalbard glaciers, Ph.D. Universiteit Utrecht 2014; advisor J. Oerlemans; publications including van Pelt and Oerlemans (2012) and van Pelt et al. (2013); personal webpage

Dr. Anne Solgaard

Large-scale modeling of the Greenland Ice Sheet on long timescales, Ph.D. University Copenhagen 2012; advisors C. Hvidberg and G. Adalgeirsdottir; publications including Solgaard et al. (2011), Solgaard and Langen (2012), and Solgaard et al. (2013); personal webpage

Dr. Ricarda Winkelmann

The future sea-level contribution from Antarctica: Projections of solid ice discharge, Ph.D. Potsdam University 2012; advisors S. Rahmstorf and A. Levermann; publications including Winkelmann et al. (2011), Winkelmann et al. (2012), Winkelmann and Levermann (2013); personal webpage

Dr. Florian Ziemen

Glacial climate variability, Ph.D. Universität Hamburg 2013; advisor U. Mikolajewicz; personal webpage

2014/01/08 20:24 · Ed Bueler

PISM team

PISM is jointly developed at the University of Alaska, Fairbanks (UAF) and the Potsdam Institute for Climate Impact Research (PIK). UAF developers, who are in the Glaciers Group at the GI, are supported by NASA's Modeling, Analysis, and Prediction and Cryospheric Sciences Programs (grants NAG5-11371, NNX09AJ38C, NNX13AM16G, NNX13AK27G) and by the Arctic Region Supercomputing Center.

home.txt · Last modified: 2014/08/03 09:02 by Ed Bueler
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