Anisotropy, Abrupt Climate Change, and the Deep Ice in West AntarcticaEntry ID: waddington_0636996
Abstract: This record includes two datasets and accompanying code.
The anisotropic flow dataset provides velocity and fabric evolution of anisotropic ice for several numerical experiments. The experiments examine how differing stress regimes and initial c-axis crystal fabrics can affect flow. Contained are VTU format files of finite element output of velocity (m/yr) as well as the second order fabric ... orientation tensor, in addition to the beginning fabric orientation tensor. VTU files are readable with the open-source ParaView package.
Also included are python2 and Fortran 90 codes for computation of various fabric parameters, as well as to compute the time derivatives of the A and B fabric tensors for computation of the material derivative of the fabric evolution equation.
The snow and firn anisotropy dataset includes snow and firn properties corresponding to several steady-state and time-varying climate histories representing different sites on the Antarctic continent. The model divides the firn pack into layers, each of which has an individual density, age, mass, temperature, grain size distribution, and grain orientation distribution.
The record also includes the model's Matlab code, tested on Matlab versions 2007b and 2009a. The code can take advantage of parallel processors but does not require them.
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
Role: TECHNICAL CONTACT
Phone: +1 (303) 492-6199
Fax: +1 (303) 492-2468
Email: nsidc at nsidc.org
National Snow and Ice Data Center CIRES, 449 UCB University of Colorado
Province or State: CO
Postal Code: 80309-0449
Pettit, E.C., E.D. Waddington, W.D. Harrison, Throstur Thorsteinsson, D. Elsberg, J. Morack, M.A. Zumberge. "The crossover stress, anisotropy, and the flow law at Siple Dome, West Antarctica," Journal of Glaciology, v.57, 2011, p. 39.
Creation and Review Dates
DIF Creation Date: 2012-03-16
Last DIF Revision Date: 2012-09-04