Histories of accumulation, thickness and WAIS Divide location from radar layers using a new inverse approachEntry ID: Waddington_0440666
Abstract: This project used geophysical inverse theory and a 2.5D flowband ice-flow forward model to extract robust transient accumulation patterns from multiple deeper layers. Histories of divide migration and ice-surface evolution are also produced. The data used to solve the inverse problem, and the model solutions are provided. Waddington et al. (2007) demonstrated this inverse approach using a ... steady-state ice-flow forward model and data from Taylor Mouth, Antarctica. Internal layers, modern ice-surface velocities, and modern ice-sheet geometry at Taylor Mouth are available, as well as the pattern of accumulation inferred by Waddington et al. (2007). The new time-dependent approach will be applied with data in the vicinity of the Ross-Amundsen divide of the West Antarctica Ice Sheet. Internal layers that have been dated from the Byrd ice core (Neumann et al. 2008), as well as modern accumulation rate, modern surface velocities, and modern ice-sheet geometry (Conway and Rasmussen, 2009) are available. This project was supported by award 0440666 from the National Science Foundation.
ISO Topic Category
Data Set Progress
Phone: 206 543 4585
Fax: 206 543 0489
Email: edw at ess.washington.edu
University of Washington Dept. of Earth and Space Sciences Box 351310
Province or State: WA
Postal Code: 98195-1310
Waddington, E.D., T.A. Neumann, M.R. Koutnik, H.P. Marshall, and D.L. Morse. 2007. Inference of accumulation-rate patterns from deep layers in glaciers and ice sheets. Journal of Glaciology 53(183), 694-712.
Neumann, T.A., H. Conway, S.F. Price, E.D. Waddington, G.A. Catania, and D.L. Morse. 2008. Holocene accumulation and ice sheet dynamics in central West Antarctica. Journal of ... Geophysical Research 113, dio:10.1029/2007JF000764.
Conway, H. and L.A. Rasmussen. 2009. Recent thinning and migration of the Western Divide, central West Antarctica. Geophysical Research Letters 36, doi:10.1029/2009GL038072.
Steen-Larsen, H.C., E.D. Waddington, and M.R. Koutnik. In Press. Formulating an inverse problem to infer the accumulation-rate pattern from deep internal layering in an ice sheet using a Monte-Carlo approach. Journal of Glaciology.
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Creation and Review Dates
DIF Creation Date: 2010-03-04
Last DIF Revision Date: 2010-03-11