Documentation for PISM, a parallel Ice Sheet Model

NEWS: GMD Discussion paper describes PISM's 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

July 2014

Click the image to go to The Cryosphere journal page.

The effect of climate forcing on numerical simulations of the Cordilleran ice sheet at the Last Glacial Maximum
investigators: J. Seguinot, C. Khroulev, I. Rogozhina, A. P. Stroeven, and Q. Zhang
journal: The Cryosphere

An ensemble of numerical simulations of the Cordilleran ice sheet in western North America during the Last Glacial Maximum (LGM) using the Parallel Ice Sheet Model. Temperature offsets to the present-day climatologies are applied from five different data sets. Surface mass balance is computed from precipitation and temperature using a positive degree-day model. We assess the model against a geomorphological reconstruction of the ice margin at the LGM. Modelled ice sheet outlines and volumes appear highly sensitive to the choice of climate forcing. For three of the four reanalysis data sets used, differences in precipitation are the major source for discrepancies between model results. Part of the mismatch is due to unresolved orographic precipitation effects caused by the coarse resolution of reanalysis data.

2014/06/30 22:10 · Ed Bueler

Latest News

Mass-conserving subglacial hydrology in PISM

In a Geoscientific Model Development Discussion paper, UAF author Ed Bueler and IMAU author Ward Van Pelt describe PISM's new mass conserving subglacial hydrology models.

For the PISM user with an interest in subglacial hydrology this paper provides a detailed description of all the subglacial hydrology models available in PISM versions v0.6 and above, along with a stability analysis, verification, and an application to the Greenland ice sheet.

2014/07/29 10:27 · Andy Aschwanden

PISM 0.6.1 has bug fixes

Only fixes and improvements that should not break existing functionality are included in this release. We recommend updating from v0.6 unless you have a good reason against it. Upgrade by doing “git pull” in the PISM source tree. (Or get a new tagged ”.tar.gz” or ”.zip” at github.com/pism/pism/releases.) Then do “make install” in the build directory.

For a full list of changes since v0.6, please see https://github.com/pism/pism/blob/stable0.6/CHANGES.md

Send email to help@pism-docs.org for help with any version of PISM.

2014/05/31 16:48 · 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: 2014/07/29 10:30 by Andy Aschwanden
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