| We develop and maintain the Parallel Ice Sheet
Model (PISM).
It
simulates the thickness, temperature, velocity and age
of ice
sheets. It uses newly-developed techniques to
model fast ice
dynamics, earth deformation, and conservation of
energy in the
two-phase fluid. It is well-documented and
verifiable. PISM's primary purpose is to simulate the Antarctic and Greenland ice sheets over both complete ice-age cycles and the next few centuries. Century-scale simulations are the basis for estimates of sea-level changes caused by ice dynamics in response to changing climate. We contribute to the SeaRISE assessment process. PISM has a growing user base. PISM users have done simulations on 1 to 4000 processors on these problems: Greenland ice sheet, Antarctica ice sheet, Svalbard glaciers, Storglaciaren (Sweden), Antarctic ice shelves, and Greenland outlet glaciers. Paleo simulations include Laurentide, North American Cordilleran, and New Zealand paleo-ice-sheets. PISM is jointly developed at the University of Alaska, Fairbanks (UAF) and the Potsdam Institute for Climate Impact Research (PIK). UAF developers are based in the Glaciers Group at the Geophysical Institute and in the Department of Mathematics and Statistics. Development is supported by NASA Modeling, Analysis, and Prediction (MAP; grant #NNX09AJ38G, 2009–2013), and by a grant of resources from the Arctic Region Supercomputing Center. left-hand figure: Observed (left; Joughin et al, submitted) and PISM-modeled (right; Bueler et al, submitted) surface speed for the Greenland ice sheet. From a 3km model grid. right-hand figure: PISM-modeled (red arrows) versus observed (black arrows) ice-flow speed for Ross Ice Shelf, Antarctica. |
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