Predicting Ice Sheet and Climate Evolution at Extreme Scales (PISCEES)

Funding Program: 

Melting of the Greenland and Antarctic ice sheets is accelerating and the resulting fresh water input into the oceans will be the dominant contribution to future sea level rise as the Earth’s climate changes. The PISCEES project is developing better computer models of large ice sheets to improve future sea level rise projections. In particular, multi-scale formulations of ice sheet dynamics are being implemented to represent the wide range of spatial scales in a robust, accurate and scalable manner. In addition, PISCEES scientists are creating new tools and techniques for validating ice sheet simulation results against observations and providing estimates of the uncertainty surrounding future projections.

Project Term: 
2012 to 2017
Project Type: 
Laboratory Funded Research

Publications:

A Comparison of Two Stokes Ice Sheet Models Applied to the Marine Ice Sheet Model Intercomparison Project for Plan View Models (MISMIP3d)
A Computational Framework For Infinite-Dimensional Bayesian Inverse Problems, Part II: Stochastic Newton MCMC With Application To Ice Sheet Flow Inverse Problems
A Matrix Dependent/Algebraic Multigrid Approach for Extruded Meshes With Applications to Ice Sheet Modeling
Albany/FELIX: a parallel, scalable and robust, finite element, first-order Stokes approximation ice sheet solver built for advanced analysis
An Ice Sheet Model Validation Framework for the Greenland Ice Sheet
Direct observations of evolving subglacial drainage beneath the Greenland Ice Sheet
Greenland subglacial drainage evolution regulated by weakly connected regions of the bed
Inversion of Geothermal Heat Flux in a Thermo-Mechanically Coupled Nonlinear Stokes Ice Sheet Model
Land Ice Verification and Validation (LIVV) Toolkit 1.0 Software Release
North Atlantic Warming and the Retreat of Greenland's Outlet Glaciers
Parameter and State Estimation with a Time-Dependent Adjoint Marine Ice Sheet Models
Parameterization of Basal Friction Near Grounding Lines in a One-Dimensional Ice Sheet Model
Procedia Computer Science, ICCS 2015 International Conference on Computational Science
Scalable and efficient algorithms for the propagation of uncertainty from data through inference to prediction for large-scale problems, with application to flow of the Antarctic ice sheet
Thermomechanically Coupled Modelling for Land-Terminating Glaciers: A comparison of two-dimensional, first-order and three-dimensional, full-Stokes approaches

Research Highlights:

A Comparison of 2D, First-Order and 3d, full-Stokes Modeling of Land Terminating Glaciers Highlight Presentation
A Matrix Dependent/Algebraic Multigrid Approach for Extruded Meshes With Applications to Ice Sheet Modeling Highlight Presentation
Albany/FELIX: A Parallel, Scalable and Robust, Finite Element, First-Order Stokes Approximation Ice Sheet Solver Highlight Presentation
An Ice Sheet Model Validation Framework for the Greenland Ice Sheet Highlight Presentation
Comparison of Stokes Ice Sheet Models for Marine Ice Sheet Experiments Highlight Presentation
Constraining Transient Ice Sheet Models with Sparse, Diverse Observations Highlight Presentation
Direct Observations of Evolving Subglacial Drainage Beneath the Greenland Ice Sheet Highlight Presentation
Inference & Prediction for the Antarctic Ice Sheet using Gaussian Approximations Highlight Presentation
Inversion of geothermal flux in a thermo-mechanically coupled nonlinear Stokes ice sheet model Highlight Presentation
Land Ice Verification and Validation (LIVV) Toolkit 1.0 Software Release Highlight Presentation
Leaky plumbing impedes Greenland Ice Sheet flow Highlight Presentation
North Atlantic Warming and the Retreat of Greenland’s Outlet Glaciers Highlight Presentation
Scalability of the Albany/FELIX dynamical core for large-scale Greenland and Antarctica simulations Highlight Presentation
Stochastic Newton MCMC for an Inverse Ice Sheet Model Problem Highlight Presentation