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Anisotropy, Abrupt Climate Change, and the Deep Ice in West Antarctica Entry ID: waddington_0636996 |
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Summary
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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. |
Related URL
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Link:
VIEW PROJECT HOME PAGE
Description: The U.S research community is conducting a deep ice coring project in West Antarctica for studies of climate, ice sheet history and cryobiology. This project is collecting a deep ice core from the West Antarctic Ice Sheet (WAIS) ice flow divide and integrating approximately 20 separate but synergistic projects to analyze the ice and interpret the records. |
Geographic Coverage
| N: -75.0 | S: -85.0 | E: -105.0 | W: -165.0 |
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Location Keywords
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CONTINENT
> ANTARCTICA
GEOGRAPHIC REGION > POLAR |
Science Keywords
| CRYOSPHERE >GLACIERS/ICE SHEETS [Definition] |
| CRYOSPHERE >GLACIERS/ICE SHEETS >ABLATION ZONES/ACCUMULATION ZONES [Definition] |
| CRYOSPHERE >GLACIERS/ICE SHEETS >ICE SHEETS [Definition] |
| CRYOSPHERE >SNOW/ICE [Definition] |
| CRYOSPHERE >SNOW/ICE >SNOW/ICE TEMPERATURE [Definition] |
| CRYOSPHERE >GLACIERS/ICE SHEETS >FIRN [Definition] |
| CRYOSPHERE >SNOW/ICE >SNOW STRATIGRAPHY [Definition] |
ISO Topic Category
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CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
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Platform
| COMPUTERS [Information] |
Project
| WAISDIVIDE >West Antarctic Ice Sheet Divide Project |
Keywords
| Siple Dome |
| Antarctica |
| WAIS |
| Anisotropy |
| Abrupt Climate Change |
| ice core |
| accumulation rate |
| vertical velocity |
| ice thickness |
| ice temperature |
| firn |
| metamorphism |
Data Set Progress
| IN WORK |
Originating Center
| University of Washington |
Data Center
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National Snow and Ice Data Center
[Information]
Data Center URL: http://nsidc.org
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NSIDC Antarctic Glaciological Data Center
[Information]
Data Center URL: http://nsidc.org/agdc/
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Personnel
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EDWIN
D
WADDINGTON Role: INVESTIGATOR Phone: 206 543 4585 Fax: 206 543 0489 Email: edw at ess.washington.edu Contact Address: University of Washington Dept. of Earth and Space Sciences Box 351310 City: Seattle Province or State: WA Postal Code: 98195-1310 Country: USA |
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NSIDC AGDC
USER SERVICES Role: TECHNICAL CONTACT Phone: +1 (303) 492-6199 Fax: +1 (303) 492-2468 Email: nsidc at nsidc.org Contact Address: National Snow and Ice Data Center CIRES, 449 UCB University of Colorado City: Boulder Province or State: CO Postal Code: 80309-0449 Country: USA |
Publications/References
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
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