Documentation for PISM, the Parallel Ice Sheet Model


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applications:201703 [2017/03/20 21:26] (current)
Ed Bueler created by copy of future_applications:201703
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 +====== March 2017 ======
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 +| **[[http://​​10.1002/​2016GL072422|East Antarctic ice sheet most vulnerable
 +to Weddell Sea warming]]** ||
 +| **investigators**:​ | [[http://​​antarctic/​about/​staff/​nick-golledge|N. Golledge]] and others|
 +| **journal**:​ | [[http://​​hub/​journal/​10.1002/​(ISSN)1944-8007|Geophysical Research Letters]] |
 +In practice, ice sheet models need to be re-run many times with slightly-altered parameters. ​ This short paper describes the results of an ensemble of 42 PISM runs for the entire Antarctic ice sheet (AIS), starting from present-day conditions, each for 10,000 model years, to see which sectors of the continent are most affected by warming. ​ The runs vary only in atmospheric (air temperature anomaly) and oceanic (sea surface temperature anomaly) warming.
 +The results are clear and consistent when examined at [[http://​​imbie-2016/​drainage-basins/​|drainage basin scale (Zwally et al 2012)]]. ​ The basins of the West Antarctic Ice Sheet (WAIS) show strong sensitivity to a modest amount of ocean warming, with a 0.5 C anomaly generating an essentially-complete collapse of WAIS, just as expected from other observational and simulation evidence. ​ In the East (EAIS), however, the Recovery ice stream basin stands out as sensitive to //both// kinds of warming. ​ Other EAIS basins such as Wilkes and Aurora are sensitive to atmospheric heat inputs but much less so to oceanic inputs.
 +<WRAP clear></​WRAP>​
applications/201703.txt ยท Last modified: 2017/03/20 21:26 by Ed Bueler
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