C53C-0799
Validation of Modelled Ice Dynamics of the Greenland Ice Sheet using Historical Forcing
Friday, 18 December 2015
Poster Hall (Moscone South)
Matthew J Hoffman1, Stephen F Price1, Ian M Howat2, Jennifer A Bonin3, Don P Chambers4, Irina Tezaur5, Joseph H Kennedy6, Jan Lenaerts7, William H Lipscomb1, Thomas Neumann8, Sophie Nowicki9, Mauro Perego5, Jack L Saba9 and Andrew Salinger5, (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)University of South Florida Tampa, Tampa, FL, United States, (5)Sandia National Laboratories, Albuquerque, NM, United States, (6)Oak Ridge National Laboratory, Oak Ridge, TN, United States, (7)Utrecht University, Utrecht, Netherlands, (8)NASA Goddard Space Flight Ctr, Greenbelt, MD, United States, (9)NASA Goddard Space Flight Center, Greenbelt, MD, United States
Abstract:
Although ice sheet models are used for sea level rise projections, the degree to which these models have been validated by observations is fairly limited, due in part to the limited duration of the satellite observation era and the long adjustment time scales of ice sheets. Here we describe a validation framework for the Greenland Ice Sheet applied to the Community Ice Sheet Model by forcing the model annually with flux anomalies at the major outlet glaciers (Enderlin et al., 2014, observed from Landsat/ASTER/Operation IceBridge) and surface mass balance (van Angelen et al., 2013, calculated from RACMO2) for the period 1991-2012. The ice sheet model output is compared to ice surface elevation observations from ICESat and ice sheet mass change observations from GRACE. Early results show promise for assessing the performance of different model configurations. Additionally, we explore the effect of ice sheet model resolution on validation skill.
