Documentation for PISM, the Parallel Ice Sheet Model

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applications:201405 [2014/04/30 17:19] (current)
Ed Bueler created by copy of future_applications:201405
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 +====== May 2014 ======
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 +[[http://​www.igsoc.org/​journal/​60/​220/​j13J093.html |{{:​applications:​feldmanetal2014-again.png?​350|}}]]
  
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 +Click the image to go to the //Journal of Glaciology//​ page.
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 +| **Resolution-dependent performance of grounding line motion in a
 +shallow model compared with a full-Stokes model according to the
 +MISMIP3d intercomparison** ||
 +| **investigators**:​ | [[http://​www.pik-potsdam.de/​~johfeld/​|J. Feldmann]], T. Albrecht, C. Khroulev, F. Pattyn, and A. Levermann|
 +| **journal**:​ | [[http://​www.igsoc.org/​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.
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applications/201405.txt · Last modified: 2014/04/30 17:19 by Ed Bueler
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