East Antarctic ice sheet most vulnerable to Weddell Sea warming

Published: Mar 1, 2017 by The PISM Authors

Title East Antarctic ice sheet most vulnerable to Weddell Sea warming
Authors N. Golledge and others
Venue 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 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.


Latest news

Version 1.2

We are pleased to announce the release of the Parallel Ice Sheet Model (PISM) v1.2.

MPI-M Hamburg, Germany: open postdoc for coupled atmosphere-ocean-ice sheet model

The Max Planck Institute for Meteorology (MPI-M) contributes to the BMBF project “From the Last Interglacial to the Anthropocene: Modeling a Complete Glacial Cycle” (PalMod, www.palmod.de), which aims at simulating the climate from the peak of the last interglacial up to the present using comprehensive Earth System Models. Phase II of this project has an open position Postdoctoral Scientist (W073). The successful candidate will be part of a local team performing and analysing long-term transient simulations covering the last glacial and the transition into the Holocene with an interactively coupled atmosphere-ocean-ice sheet model. Additionally, the candidate will contribute to the continued development of this model. The model system consists of the MPI-Earth system model, the ice sheet model PISM, and the solid-earth model VILMA.

AWI PostDoc: Antarctic Ice Sheets in warming climates

Dr. Lohmann’s group at AWI is seeking a postdoc to work with PISM and the multi-scale Earth system model AWI-ESM. See