Documentation for PISM, the Parallel Ice Sheet Model


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applications:201612 [2016/12/12 21:50] (current)
Ed Bueler created by copy of future_applications:201612
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 +====== December 2016 ======
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 +| **[[http://​​71/​173/​2016/​|Last Glacial Maximum precipitation pattern in the Alps inferred from glacier modelling]]** ||
 +| **investigators**:​ | [[http://​​en/​people/​person-detail.html?​persid=190326|P. Becker]] and others|
 +| **journal**:​ | [[http://​​index.html|Geographica Helvetica]] |
 +During the Last Glacial Maximum (LGM), glaciers in the Alps reached a maximum extent well-beyond their current coverage (red line). ​ This study models the ice cap using PISM and parameterized forms of the uncertain LGM precipitation pattern. ​ Constraints on the model come from geomorphological reconstruction of ice extent based on interpretation of moraines, trimlines and erratic boulders. ​ The model is forced using different temperature cooling and precipitation reduction factors. ​ Use of the present-day precipitation pattern leads to a systematic overestimation of the ice cover on the northern part of the Alps relative to the southern part.  A more severe decrease in precipitation in the north was required to reproduce the LGM extent. ​ This result supports a southwesterly advection of atmospheric moisture to the Alps, sustained by a southward shift of the North Atlantic storm track during the LGM.
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applications/201612.txt ยท Last modified: 2016/12/12 21:50 by Ed Bueler
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