Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet SystemEntry ID: parizek_0758274
Abstract: This NSF-ANT award supports a three-year study to isolate essential physical processes affecting Thwaites Glacier (TG) in the Amundsen Sea Embayment (ASE) of West Antarctica using a suite of existing numerical models in conjunction with existing and International Polar Year (IPY)-proposed data sets.
Purpose: Four different models will be utilized to explore the effects of embayment geometry, ice-shelf buttressing, basal-stress distribution, surface mass balance, surface climate, and inland dynamic perturbations on the present and future dynamics of TG. This particular collection of models is ideally suited for the broad nature of this investigation, as they incorporate efficient and complementary ... simplifications of the stress field (shallow-ice, shelf-stream, and higher-order), system geometry (1-d and 2-d plan-view and flowline; depth-integrated and depth-dependent), and mass-momentum-energy coupling (mechanical and thermo-mechanical). The models will be constrained and validated by data sets (including regional maps of ice thickness, surface elevation, basal topography, ice surface velocity, and potential fields) and geophysical data analyses (including increasing the spatial resolution of surface elevations, improving regional estimates of geothermal flux, and characterizing the sub-glacial interface of grounded ice as well as the grounding-zone transition between grounded and floating ice).
(Click for Interactive Map)
Start Date: 1973-01-01Stop Date: 2591-12-31
ISO Topic Category
Phone: 814 375 4834
Email: parizek at psu.edu
Penn State DuBois Mathematics and Geosciences 181 Smeal Building, College Place
Province or State: PA
Postal Code: 15801
Phone: (512) 471-0489
Fax: (512) 471-8844
Email: blank at ig.utexas.edu
J.J. Pickle Research Campus, Bldg. 196 | 10100 Burnet Rd.
Province or State: TX
Postal Code: 78758
Phone: +1 949.824.9934
Fax: +1 949.824.3874
Email: tdupont at uci.edu
University of California Department of Earth System Science 3218 Croul Hall Mail Code 3100
Province or State: California
Postal Code: 92697
Email: jack at ig.utexas.edu
Institute for Geophysics University of Texas at Austin 4412 Spicewood Springs Rd. #600
Province or State: TX
Postal Code: 78759-8500
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
Ackert, RP; Mukhopadhyay, S; Parizek, BR; Borns, HW, "Ice elevation near the West Antarctic Ice Sheet divide during the Last Glaciation", GEOPHYSICAL RESEARCH LETTERS, p. , vol. 34, 10.1029/2007GL03141, 2007.
Vaughan, D.G., J.W. Holt, and D.D. Blankenship, "West Antarctic Links to Sea Level Estimation", EOS, Transactions, American Geophysical Union, p. 485, vol. 88, 2007.
Little, C.M., M. Oppenheimer, R.B. Alley, V. Balaji, G.K.C. Clarke, and fifteen others, "Toward a New Generation of Ice Sheet Models", EOS, Transactions, American Geophysical Union, p. 578, vol. 88, 2007.
Alley, RB; Horgan, HJ; Joughin, I; Cuffey, KM; Dupont, TK; Parizek, BR; Anandakrishnan, S; Bassis, J, "A Simple Law for Ice-Shelf Calving", SCIENCE, p. 1344, vol. 322, 10.1126/science.116254, 2008.
Walker, RT; Dupont, TK; Parizek, BR; Alley, RB, "Effects of basal-melting distribution on the retreat of ice-shelf grounding lines", GEOPHYSICAL RESEARCH LETTERS, p. , vol. 35, 10.1029/2008GL03494, 2008.
Walker, R.T., T.K. Dupont, D.M. Holland, B.R. Parizek, and R.B. Alley, "Initial effects of oceanic warming on a coupled ocean-ice shelf-ice stream system", EARTH AND PLANETARY SCIENCE LETTERS, p. 483, vol. 287, 10.1016/j.epsl.2009.08.032, 2009.
Parizek, B.R., R.B. Alley, T.K. Dupont, R.T. Walker, and S. Anandakrishnan, "Effect of Orbital-Scale Climate Cycling and Meltwater Drainage on Ice-Sheet Grounding-Line Migration", JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE, p. F010, vol. 115, 10.1029/2009JF001325, 2010.
Parizek, B.R., "Sliding to sea", NATURE GEOSCIENCE, v. 3, no. 6, 385-386, doi:10.1038/ngeo879, 2010.
Parizek, B.R. and R.T. Walker, "Implications of initial conditions and ice-ocean coupling on grounding-line evolution", EARTH AND PLANETARY SCIENCE LETTERS, p. 351, vol. 300, 10.1016/j.epsl.2010.10.016, 2010.
Walker, R.T., K. Christianson, B.R. Parizek, S. Anandakrishnan, and R.B. Alley, "A viscoelastic flowline model applied to tidal forcing of Bindschadler Ice Stream, West Antarctica", EARTH AND PLANETARY SCIENCE LETTERS, 319-320C, 128-132, doi:10.1016/j.epsl.2011.12.019, 2012.
Walker, R.T., B.R. Parizek, R.B. Alley, S. Anandakrishnan, K.L. Wilson, and K. Christianson, "Ice-shelf tidal flexure and subglacial pressure variations", In review, JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE, 2012JF002429.
Lampkin, D.J., N. Amador, B.R. Parizek, K. Farness, and K. Jezek, "Investigating the impact of melt water drainage from water-filled crevasses on ice mass flux along the margins of Jakobshavn Isbrae", Submitted, JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE, 2012JF002502.
Parizek, B.R., K. Christianson, S. Anandakrishnan, R.B. Alley, R.T. Walker, R.A. Edwards, D.S. Wolfe, G.T. Bertini, S.K. Rinehart, R.A. Bindschadler, and S.M.J. Nowicki, "Dynamic (In)stability of Thwaites Glacier, West Antarctica", Submitted, JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE, 2012JF002509.
Creation and Review Dates
DIF Creation Date: 2012-05-15
Last DIF Revision Date: 2012-06-07