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Climate Variability & Change, Water & Energy Cycles

We propose a set of ice sheet model developments and associated numerical experiments that when combined with ICESat, Cryosat, or other remote altimetry data sets, promise to improve both attribution of observed changes to specific mechanisms and our ability to asses ice sheet vulnerability to specific forcings. Modeling work will take take place in three phases, beginning with extension of well validated and tested prototype models to include advanced treatment of basal water distribution and grounding line migration. In the second phase of the proposed research, the prototypes will be integrated into the Community Ice Sheet Model (CISM). Finally, tests of ice sheet sensitivity to marginal perturbations will be conducted, and provide assessment of sea level change. The proposed work extends current efforts to maintain and improve all aspects of the community based ice sheet model, CISM. The cost associated with these activities is offset by the benefits of community efforts to articulate standardized experiments, climate coupling, high performance computing, and a model steering and planning community. The objectives of the proposed work are relevant to NASA's strategic goal 3A.5, understanding the role of oceans, atmosphere, and ice in the climate system and improving predictive capability for its future evolution. We address three science questions in subgoal 3A: How is the global Earth system changing? What are the primary causes of change in the Earth system? How will the Earth system change in the future?

Project PI: Christina Hulbe/Portland State University

Portland State University Department of Geology Room 17 Cramer Hall 1721 SW Broadway Portland OR 97201

Phone: (503)725-3388

Email: chulbe@pdx.edu

http://web.pdx.edu/~chulbe/

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Started: Sep 27, 2010

Last Activity: Jan 04, 2011

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