A Historical Forcing Ice Sheet Model Validation Framework for Greenland

Friday, 19 December 2014: 4:15 PM
Stephen F Price1, Matthew J Hoffman1, Ian M Howat2, Jennifer A Bonin3, Don P Chambers3, Irina Kalashnikova4, Thomas Neumann5, Sophie Nowicki5, Mauro Perego4 and Andy Salinger6, (1)Los Alamos National Laboratory, Los Alamos, NM, United States, (2)OH St Univ-Earth Sciences, Columbus, OH, United States, (3)University of South Florida, St. Petersburg, FL, United States, (4)Sandia National Laboratories, Albuquerque, NM, United States, (5)NASA Goddard Space Flight Ctr, Greenbelt, MD, United States, (6)Sandia National Laboratory, Albuquerque, NM, United States
We propose an ice sheet model testing and validation framework for Greenland for the years 2000 to the present. Following Perego et al. (2014), we start with a realistic ice sheet initial condition that is in quasi-equilibrium with climate forcing from the late 1990’s. This initial condition is integrated forward in time while simultaneously applying (1) surface mass balance forcing (van Angelen et al., 2013) and (2) outlet glacier flux anomalies, defined using a new dataset of Greenland outlet glacier flux for the past decade (Enderlin et al., 2014). Modeled rates of mass and elevation change are compared directly to remote sensing observations obtained from GRACE and ICESat. Here, we present a detailed description of the proposed validation framework including the ice sheet model and model forcing approach, the model-to-observation comparison process, and initial results comparing model output and observations for the time period 2000-2013.