NEWS: PISM version 0.7 is out
The Parallel Ice Sheet Model pism0.7 is an open source, parallel, high-resolution ice sheet model. Features:
|Interaction of marine ice-sheet instabilities in two drainage basins: simple scaling of geometry and transition time|
|investigators:||J. Feldmann and A. Levermann|
The marine ice-sheet instability generally comes from the ocean side of the ice sheet. Using a flow-line geometry in PISM, this paper investigates whether instability can be triggered from the direction of the ice divide. The authors find that the instability in one basin can induce a destabilization in the other. The underlying mechanism is dynamic thinning and consequent motion of the ice divide. They conclude that for the three-dimensional case, the possibility of drainage basin interaction on timescales on the order of 1 kyr or larger cannot be excluded and needs further investigation.
At the AGU Fall Meeting 2014, PISM simulations and results were featured in a number of posters and oral presentations.
PISM is jointly developed at the University of Alaska, Fairbanks (UAF) and the Potsdam Institute for Climate Impact Research (PIK). UAF developers, who are in the Glaciers Group at the GI, are supported by NASA's Modeling, Analysis, and Prediction and Cryospheric Sciences Programs (grants NAG5-11371, NNX09AJ38C, NNX13AM16G, NNX13AK27G) and by the Arctic Region Supercomputing Center.