Documentation for PISM, the Parallel Ice Sheet Model

November 2014

Three cross sections (north, center, south) through the modeled initial states, at a 5 km resolution. Click the image to go to Journal of Glaciology journal.

Role of model initialization for projections of 21st-century Greenland ice sheet mass loss
investigators: G. Adalgeirsdottir and 6 others
journal: J. Glaciol.

This paper assesses the sensitivity of projections of Greenland ice sheet contribution to 21st-century sea-level rise to the model initial state. Four initialization methods are applied using PISM. The simulated contribution to sea-level rise by 2100 ranges from an equivalent of 0.2 to 6.8 cm. The largest uncertainties arise from different formulations of the regional climate models (0.8โ€“3.9 cm) and applied scenarios (0.65โ€“1.9 cm), but an important source of uncertainty is the initialization method (0.1โ€“0.8 cm). These model simulations do not account for the recently observed acceleration of outlet glaciers and consequent thinning rates, ocean forcing, or the feedback occurring between ice-sheet elevation changes and climate forcing. These results should be considered a lower limit of Greenland ice sheet contributions to sea-level rise, until such processes have been integrated into large-scale ice-sheet models.

applications/201411.txt ยท Last modified: 2014/11/05 16:40 by Andy Aschwanden
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