Modeling the Dynamics of Surface-Slope Reversals and Their Role in the Formaiton and Stability of Subglacial LakesEntry ID: Dupont_0814241
Abstract: This is a metadata entry for an NSF-funded project to examine the ice and basal-hydrologic dynamics associated with reversals in the ice/air surface slope. This project, NSF ANT 0814241, was a multi-year (2007-2011) effort directly involving Todd K. Dupont and Richard B. Alley. It was a modeling study which involved simulating (a) the formation of surface-slope reversals in ice-stream/ice-shelf ... systems, and (b) the ability of subglacial lakes to be produced with the help of these reversals. Beyond this, ice/bed hydraulic coupling was examined. In all cases a key premise was that ice/air surface gradient controls the subglacial hydrologic potential, and thus the flow of water beneath the ice. This work has implications for understanding how subglacial lakes, and more ephemeral water pockets, form and evolve, and for assessing coupling between ice and its subglacial lubricant. Gauging the potential for an ice-stream/ice-shelf system to produce outburst floods, was a key motivator for this endeavor. Included here are references of publications resulting from this work.
Data Set Progress
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
Phone: 814 863-1700
Email: ralley at geosc.psu.edu
Pennsylvania State University Department of Geosciences 517 Deike Building
City: University Park
Province or State: PA
Postal Code: 16802
Walker, RT; Dupont, TK; Holland, DM; Parizek, BR; Alley, RB, "Initial effects of oceanic warming on a coupled ocean-ice shelf-ice stream system", EARTH AND PLANETARY SCIENCE LETTERS, vol. 287, (2009), p. 483., 10.1016/j.epsl.2009.08.03
Little, C.M., M. Oppenheimer, R.B. Alley, V. Balaji, G.K.C. Clarke, et al., "Toward a New Generation of Ice Sheet Models", EOS, Transactions, American Geophysical Union, vol. 88, (2007), p. 578.
Byron R. Parizek, Richard B. Alley, Todd K. Dupont, Ryan T. Walker, and Sridhar Anandakrishnan, "Effect of Orbital-Scale Climate Cycling and Meltwater Drainage on Ice-Sheet Grounding-Line Migration", Journal of Geophysical Research - Earth Surface, vol. 115, (2010), p. ., 10.1029/2009JF001325
Alley, RB; Horgan, HJ; Joughin, I; Cuffey, KM; Dupont, TK; Parizek, BR; Anandakrishnan, S; Bassis, J, "A Simple Law for Ice-Shelf Calving", SCIENCE, vol. 322, (2008), p. 1344., 10.1126/science.116254
Walker, RT; Dupont, TK; Parizek, BR; Alley, RB, "Effects of basal-melting distribution on the retreat of ice-shelf grounding lines", GEOPHYSICAL RESEARCH LETTERS, vol. 35, (2008), p. ., 10.1029/2008GL03494
Das, SB; Alley, RB, "Rise in frequency of surface melting at Siple Dome through the Holocene: Evidence for increasing marine influence on the climate of West Antarctica", JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, vol. 113, (2008), p. ., 10.1029/2007JD00879
Jonathan T. Overpeck, Bette L. Otto-Bliesner, Gifford H. Miller, Daniel R. Muhns, Richard B. Alley, and Jeffery T. Kiehl, "Paleoclimatic Evidence for Future Ice-Sheet Instability and Rapid Sea-Level Rise", Science, vol. 311, (2006), p. 1747
Todd K. Dupont and Richard B. Alley, "The Role of Small Ice Shelves in Sea-Level Rise", Geophysical Research Letters, vol. 33, (2006), p. L09503.
Richard B. Alley, Peter U. Clark, Philippe Huybrechts, and Ian Joughin, "Ice-Sheet and Sea-Level Changes", Science, vol. 310, (2005), p. 456.
Creation and Review Dates
DIF Creation Date: 2012-03-21
Last DIF Revision Date: 2012-03-23