HR: 0830h
AN: C11C-0822    [PDF]
TI: Intergrating Numerical Modeling and Field Observations with GIS to Determine the Paleotopography of the Fennoscandian Ice Sheet Through the Last Glacial Cycle.
AU: * Napieralski, J A
EM: jnapiera@purdue.edu
AF: Purdue University, Civil Engineering Building 550 Stadium Mall Drive, West Lafayette, IN 47907
AU: Hubbard, A
EM: alh@geo.ed.ac.uk
AF: University of Edinburgh, Drummond Street, Edinburgh, EH89XP United Kingdom
AU: Harbor, J
EM: jharbor@purdue.edu
AF: Purdue University, Civil Engineering Building 550 Stadium Mall Drive, West Lafayette, IN 47907
AU: Stroeven, A P
EM: arjen.stroeven@geo.su.se
AF: Stockholm University, SE-106 91, Stockholm, SE10691 Sweden
AB: Major limitations in the successful use of ice sheet models for climate research arise from limited field data for model calibration. The end results may be unrealistic simulations of ice sheet inception, growth, and decay. There is, however, an abundance of empirical data in Fennoscandia that can be used to verify and refine a model of the Fennoscandian Ice Sheet (FIS) through the last glacial cycle. A high resolution, three-dimensional, thermomechanical model is being used to simulate the FIS through a glacial cycle while field evidence, such as end moraines, ice flow characteristics (e.g., flow orientation and magnitude), and cosmogenic dates, will be compiled into a Geographic Information Systems (GIS) database and used to verify the model results. Modeled simulations for the Last Glacial Maximum (LGM) and 1,000 year time slices are being statistically compared against field observations (digitized maps from prior research) using an iterative process in order to determine the "goodness of fit". The end results will be FIS reconfiguration maps illustrating the paleotopography and dynamics of the FIS during the inception, growth, and decay. As a result, the ice dynamics under which the geomorphic landforms were formed will be suggested, as well as a new reconstruction of the timing and dynamics of the advance of the FIS.
DE: 1824 Geomorphology (1625)
DE: 1827 Glaciology (1863)
DE: 5416 Glaciation
DE: 9335 Europe
SC: Cryosphere [C]
MN: 2003 Fall Meeting