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Post-stagnation behavior in the upstream regions of Ice Stream C, West Antarctica

  • S. F. Price (a1), R. A. Bindschadler (a2), C. L. Hulbe (a3) and I. R. Joughin (a4)
Abstract

The region where two active tributaries feed into the now stagnant Ice Stream C (ISC), West Antarctica, is thickening. In this region, we observe a correlation between faster ice flow (the tributaries) and elevated topography. We conclude that stagnation of ISC resulted in compression and thickening along the tributaries, eventually forming a “bulge” on the ice-sheet surface. Modern hydraulic potential gradients would divert basal meltwater from ISC to Ice Stream B (ISB). These gradients are primarily controlled by the bulge topography, and so likely formed subsequent to trunk stagnation. As such, we argue against “water piracy” as being the cause for ISC’s stagnation. Kinematic-wave theory suggests that thickness perturbations propagate downstream over time, but that kinematic-wave speed decreases near the stagnant trunk. This and modest diffusion rates combine to trap most of the tributary-fed ice in the bulge region. Using interfero-metric synthetic aperture radar velocity measurements, we observe that half of the ice within ISC’s southern tributary flows into ISB. That flow pattern and other observations of non-steady flow in the region likely result from stagnation-induced thickening along upper ISC combined with a longer period of thinning on upper ISB. If current trends in thickness change continue, more ice from upper ISC will be diverted to ISB.

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References
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Alley, R. B., Anandakrishnan, S., Bentley, C. R. and Lord, N.. 1994. Awater-piracy hypothesis for the stagnation of Ice Stream C, Antarctica. Ann. Glaciol., 20, 187194.
Anandakrishnan, S., Blankenship, D. D., Alley, R. B. and Stoffa, P. L.. 1998. Influence of subglacial geology on the position of a West Antarctic ice stream from seismic observations. Nature, 394(6688), 6265.
Anandakrishnan, S., Alley, R. B., Jacobel, R. W. and Conway, H.. 2001. The flow regime of Ice Stream C and hypotheses concerning its recent stagnation. In Alley, R. B. and Bindschadler, R. A., eds. The West Antarctic ice sheet: behavior and environment. Washington, DC, American Geophysical Union, 283294. (Antarctic Research Series 77.)
Bamber, J. L. and Bindschadler, R. A.. 1997. An improved elevation dataset for climate and ice-sheet modelling: validation with satellite imagery. Ann. Glaciol., 25, 439444.
Bindschadler, R. 1997. Actively surging West Antarctic ice streams and their response characteristics. Ann. Glaciol, 24, 409414.
Bindschadler, R. and Vornberger, P.. 1998. Changes in the West Antarctic ice sheet since 1963 from declassified satellite photography. Science, 279(5351), 689692.
Bindschadler, R., Vornberger, P., Blankenship, D., Scambos, T. and Jacobel, R.. 1996. Surface velocity and mass balance of Ice Streams D and E, West Antarctica. J. Glaciol., 42(142), 461475.
Bougamont, M. H. and Tulaczyk, S.. 2000. Stoppage of Ice Stream C: an exception or the rule? [Abstract.] EOS, 81(48), Fall Meeting Supplement, F401-F402.
Butkov, E. 1968. Mathematical physics. Menlo Park, CA, Addison-Wesley Publishing Co.
Clarke, T. S., Chen, L., Lord, N. E. and Bentley, C. R.. 2000. Evidence for a recently abandoned shear margin adjacent to Ice Stream B2, Antarctica, from ice-penetrating radar measurements. J. Geophys. Res., 105(B6), 13,40913,422.
Echelmeyer, K. A. and Harrison, W. D.. 1999. Ongoing margin migration of Ice Stream B, Antarctica. J. Glaciol., 45(150), 361369.
Gudmundsson, G. H., Raymond, C. F. and Bindschadler, R.. 1998. The origin and longevity of flow stripes on Antarctic ice streams. Ann. Glaciol., 27, 145152.
Hamilton, G. S., Whillans, I. M. and Morgan, P. J.. 1998. First point measurements of ice-sheet thickness change in Antarctica. Ann. Glaciol., 27, 125129.
Hodge, S. M. and Doppelhammer, S. K.. 1996. Satellite imagery of the onset of streaming flow of Ice Streams C and D, West Antarctica. J. Geophys. Res., 101(C3), 66696677.
Hooke, R. LeB. 1998. Principles of glacier mechanics. Upper Saddle River, NJ, Prentice Hall.
Hulbe, C. L. and Whillans, I. M.. 1997. Weak bands within Ice Stream B, West Antarctica. J. Glaciol., 43(145), 377386.
Jacobel, R. W., Gades, A. M., Gottschling, D. L., Hodge, S. M. and Wright, D. L.. 1993. Interpretation of radar-detected internal layer folding in West Antarctic ice streams. J. Glaciol., 39(133), 528537.
Jacobel, R. W., Scambos, T. A., Raymond, C. F. and Gades, A. M.. 1996. Changes in the configuration ofice stream flow from the West Antarctic ice sheet. J. Geophys. Res., 101(B3), 54995504.
Joughin, I. and 7 others. 1999. Tributaries of West Antarctic ice streams revealed by RADARSAT interferometry. Science, 286(5438), 283286.
Merry, C. J. and Whillans, I. M.. 1993. Ice-flow features on Ice Stream B, Antarctica, revealed by SPOT HRV imagery. J. Glaciol., 39(133), 515527.
Nereson, N. A. and Raymond, C. F.. 2001. The elevation history of ice streams and the spatial accumulation pattern along the Siple Coast of West Antarctica inferred from ground-based radar data from three inter-ice-stream ridges. J. Glaciol., 47(157), 303313.
Nye, J. F. 1960. The response of glaciers and ice-sheets to seasonal and climatic changes. Proc. R. Soc. London, Ser. A, 256(1287), 559584.
Price, S. F. and Whillans, I. M.. 1998. Delineation of a catchment boundary using velocity and elevation measurements. Ann. Glaciol., 27, 140144.
Retzlaff, R. and Bentley, C. R.. 1993. Timing of stagnation of Ice Stream C, West Antarctica, from short-pulse radar studies of buried surface crevasses. J. Glaciol., 39(133), 553561.
Retzlaff, R., Lord, N. and Bentley, C. R.. 1993. Airborne-radar studies: Ice Streams A, B and C, West Antarctica. J. Glaciol., 39(133), 495506.
Rose, K. E. 1979. Characteristics ofice flow in Marie Byrd Land, Antarctica. J. Glaciol., 24(90), 6375.
Scambos, T. A. and Bindschadler, R.. 1993. Complex ice stream flow revealed by sequential satellite imagery. Ann. Glaciol., 17, 177182.
Shabtaie, S. and Bentley, C. R.. 1987. West Antarctic ice streams draining into the Ross Ice Shelf: configuration and mass balance. J. Geophys. Res., 92(B2), 13111336. (Erratum: J. Geophys. Res., 92(B9), 1987, p.9451)
Shabtaie, S., Bentley, C. R., Bindschadler, R. A. and MacAyeal, D. R.. 1988. Mass-balance studies of Ice Streams A, B, and C, West Antarctica, and possible surging behavior of Ice Stream B. Ann. Glaciol., 11, 137149.
Smith, B. 1999. Radar studies on Ice Stream C, West Antarctica. (M.Sc. thesis, University of Wisconsin–Madison.)
Stephenson, S. N. and Bindschadler, R. A.. 1988. Observed velocity fluctuations on a major Antarctic ice stream. Nature, 334(6184), 695697.
Stephenson, S. N. and Bindschadler, R. A.. 1990. Is ice-stream evolution revealed by satellite imagery? Ann. Glaciol., 14, 273277.
Thomas, R. H., Stephenson, S. N., Bindschadler, R. A., Shabtaie, S. and Bentley, C. R.. 1988. Thinning and grounding-line retreat on Ross Ice Shelf, Antarctica. Ann. Glaciol., 11, 165172.
Tulaczyk, S. M., Kamb, B. and Engelhardt, H. F.. 2000a. Basal mechanics of Ice Stream B, West Antarctica. I. Till mechanics. J. Geophys. Res., 105(B1), 463481.
Tulaczyk, S. M., Kamb, B. and Engelhardt, H. F.. 2000b. Basal mechanics of Ice Stream B, West Antarctica. II. Undrained-plastic-bed model. J. Geophys. Res., 105(B1), 483494.
Weertman, J. 1957. On the sliding ofglaciers. J. Glaciol., 3(21), 3338.
Whillans, I. M. and Bindschadler, R. A.. 1988. Mass balance of Ice Stream B, West Antarctica. Ann. Glaciol., 11, 187193.
Whillans, I. M. and Johnsen, S. J.. 1983. Longitudinal variations in glacial flow: theory and test using data from the Byrd Station strain network, Antarctica. J. Glaciol., 29(101), 7897.
Whillans, I. M. and van der Veen, C. J.. 1993. New and improved determinations of velocity of Ice Streams B and C, West Antarctica. J. Glaciol., 39(133), 483490.
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Journal of Glaciology
  • ISSN: 0022-1430
  • EISSN: 1727-5652
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