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Is the East Antarctic ice sheet stable?

Published online by Cambridge University Press:  20 January 2017

Katherine Pingree ,
Max Lurie  and
Terence Hughes
Katherine Pingree
Affiliation:
Department of Earth Sciences, University of Maine, Orono, ME 04469-5790, USA
Max Lurie
Affiliation:
Department of Earth Sciences, University of Maine, Orono, ME 04469-5790, USA
Terence Hughes*
Affiliation:
Department of Earth Sciences, University of Maine, Orono, ME 04469-5790, USA Climate Change Institute, University of Maine, Orono, ME 04469-5790, USA
*
⁎Corresponding author. Climate Change Institute, University of Maine, Orono, ME 04469-5790, USA.
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Abstract

The Greenland and East and West Antarctic ice sheets are assessed as being the source of ice that produced an Eemian sea level 6 m higher than present sea level. The most probable source is total collapse of the West Antarctic Ice Sheet accompanied by partial collapse of the adjacent sector of the East Antarctic Ice Sheet in direct contact with the West Antarctic Ice Sheet. This conclusion is reached by applying a simple formula relating the “floating fraction” of ice along flowlines to ice height above the bed. Increasing the floating fraction lowered ice elevations enough to contribute up to 4.7 m to global sea level. Adding 3.3 m resulting from total collapse of the West Antarctic Ice Sheet accounts for the higher Eemian sea level. Partial gravitational collapse that produced the present ice drainage system of Amery Ice Shelf contributes 2.3 m to global sea level. These results cast doubt on the presumed stability of the East Antarctic Ice Sheet, but destabilizing mechanisms remain largely unknown. Possibilities include glacial surges and marine instabilities at the respective head and foot of ice streams.

Keywords

East Antarctic ice sheetIce streamsIce shelvesRising sea levelClimate change
Type
Research Article
Information
Quaternary Research , Volume 75 , Issue 3 , May 2011 , pp. 417 - 429
Copyright
University of Washington

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References

Alley, R.B., and Bindschadler, R.A. The West Antarctic ice sheet: behavior and environment. American Geophysical Union (Antarctic Research Series), Washington, DC. (2001). 296 pages Google Scholar
Alley, R.B., Gow, A.J., Meese, D.A., Waddington, E., and Bolzan, J. Grain-scale processses, folding, and stratigraphic disturbance in the GISP2 ice core. Journal of Geophysical Research 102, 26 (1997). 819–826. 830 Google Scholar
Bahr, D. On fundamental limits to glacier flow models: computational theory and implications. Journal of Glaciology 55, (2009). 229–238.Google Scholar
Bamber, J.L., Riva, R.E.M., Vermeersen, B.L.A., and LeBrocq, A.M. Reassessment of the potential sea-level rise from a collapse of the West Antarctic ice sheet. Science 324, (2009). 901–903.CrossRefGoogle ScholarPubMed
Bell, R.E. East Antarctica: an ice sheet controlled by lakes and mountains. Lecture deliviered on 1 November 2006 at the Center for Remote Sensing Ice Sheets (CReSIS), University of Kansas. (2006). Google Scholar
Bindschadler, R.A. Actively surging West Antarctic ice streams and their response characteristics. Annals of Glaciology 24, (1997). 409–413.Google Scholar
Christoffersen, P. et al. Warm Atlantic water drives Greenland Ice Sheet discharge-dynamics. [Abstract C31B-501] EOS 89, Fall Meeting Supplement. (2008). Google Scholar
Craven, M., Allison, I., Fricker, H.A., and Warner, R. Properties of a marine ice layer under the Amery Ice Shelf, East Antarctica. Journal of Glaciology 55, (2009). 717–728.Google Scholar
Denton, G.H., and Hughes, T.J. Reconstructing the Antarctic ice sheet at the last glacial maximum. Quaternary Sciences Reviews 21, (2002). 193–202.Google Scholar
Drewry, D.J., ed. (1983). Antarctica: Glaciological and Geophysical Folio. Scott Polar Research Institute, University of Cambridge, Cambridge, UK.Google Scholar
Erlingsson, U. Lake Vostok behaves like a ‘captured lake’ and may be near to creating an Antarctic Jökulhlaup. Geografiska Annaler 88A, (2006). 1–7.Google Scholar
Erlingsson, U. A Jökulhlaup from a Laurentian captured ice shelf to the gulf of Mexico could have caused the bolling warming. Geografiska Annaler 90A, (2008). 125–140.Google Scholar
Fricker, H.A., and Scambos, T.A. Connected subglacial lake activity on lower Mercer and Whillans Ice Streams, West Antarctica, 2003–2008. Journal of Glaciology 55, (2009). 303–315.Google Scholar
Hall, B.L., Baroni, C., and Denton, G.H. Holocene relative sea-level history of the southern Victoria Land coast, Antarctica. Global and Planetary Change 42, (2004). 241–263.CrossRefGoogle Scholar
Hofstede, C. M. (2008). “Ice Stream Dynamics: A Transition Between Sheet Flow and Shelf Flow.�.� Ph.D. thesis, University of Maine, .Google Scholar
Holland, D.M., Thomas, R.H., de Young, B., Ribergaard, M.H., and Lyberth, B. Acceleration of Jakobdshavn Isbrae triggered by warm subsurface ocean waters. Nature Geoscience 1, (2008). 659–664.Google Scholar
Hollin, J. On the glacial history of Antarctica. Journal of Glaciology 4, (1962). 173–195.Google Scholar
Hollin, J.T. Interglacial climates and Antarctic ice surges. Quaternary Research 2, (1972). 401–408.Google Scholar
Hughes, T. Is the West Antarctic ice sheet disintegrating?. Journal of Geophysical Research 78, (1973). 7884–7910.Google Scholar
Hughes, T. The West Antarctic ice sheet: instability, disintegration, and initiation of ice ages. Reviews of Geophysics and Space Physics 13, (1975). 502–526.Google Scholar
Hughes, T. The weak underbelly of the West Antarctic ice sheet (letter). Journal of Glaciology 27, (1981). 518–525.Google Scholar
Hughes, T. Ice Sheets. (1998). Oxford University Press, New York. 343 pages Google Scholar
Hughes, T. Greenland ice sheet and rising sea level in a worst-case climatic change scenario. Polar Meteorology and Glaciology 18, (2004). 54–71.Google Scholar
Hughes, T. Modeling ice sheets from the bottom up. Quaternary Science Reviews 28, (2009). 1831–1849.Google Scholar
Hughes, T. Variations in ice-bed coupling beneath and beyond ice streams: the force balance. Journal of Geophysical Research 114, (2009). 20 pp Google Scholar
Hughes, T.J., Denton, G.H., and Grosswald, M.G. Was there a late Würm Arctic ice sheet?. Nature 266, (1977). 596–602.Google Scholar
Johnson, J. (2002). “A Basal Water Model for Ice Sheets.�.� Ph.D. thesis, University of Maine, .Google Scholar
Joughin, I.R., Tulaczyk, S.M., Bamber, J.L., Blankenship, D.D., Holt, J.W., Scambos, T.A., and Vaughan, D.G. Basal conditions for Pine Island and Thwaites Glalciers, West Antarctica, determined using satellite and airborne data. Journal of Glaciology 55, (2009). 245–257.Google Scholar
Kamb, B., Raymond, C.F., Harrison, W.D., Engelhardt, H., Brugman, M.M., and Pfeffer, T. Glacier surge mechanism: 1982–1983 surge of Variegated Glacier, Alaska. Science 227, (1985). 469–479.Google Scholar
Kellogg, T.B., and Kellogg, D.E. Recent glacial history and rapid ice-stream retreat in the Amundsen Sea. Journal of Geophysical Research 92, (1987). 8859–8864.Google Scholar
Mayewski, P.A., Meeker, L.D., Twickler, M.S., Whitlow, S., Yang, Q., and Prentice, M. Major features and forcing of high latitude Northern Hemisphere Atmospheric Circulation using a 110,000 year long glaciochemical series. Journal of Geophysical Research (Special Issue-Oceans/Atmosphere) 102, 26 (1997). 345-26, 366 Google Scholar
Mercer, J.H. Antarctic ice and Sangamon sea level. International Association of Scientific Hyrdrology 79, (1968). 217–225. Publication Number Google Scholar
Mercer, J.H. A former ice sheet in the Arctic Ocean. Palaeogeography, Palaeoclimatology, Palaeoecology 8, (1970). 19–27.Google Scholar
Morland, L.W. Primary, secondary and teriary creep of ice modelled as a viscoelastic fluid. Journal of Glaciology 55, (2009). 170–178.CrossRefGoogle Scholar
Morland, L.W. Age-depth correlation, grain growth and dislocation-density evolution, for three ice cores. Journal of Glaciology 55, (2009). 345–352.Google Scholar
Nye, J.F. The mechanics of glacier flow. Journal of Glaciology 2, (1952). 82–93.Google Scholar
Oswald, G.K.A., and Robin, G.deQ. Lakes beneath the Antarctic ice sheet. Nature 245, (1973). 251–254.Google Scholar
Paden, J., Akins, T., Dunson, D., Allen, C., and Gogineni, P. Ice-sheet bed 3-D tomography. Journal of Glaciology 56, (2010). 3–11.Google Scholar
Paterson, W.S.B. The Physics of Glaciers. 3rd Edition (1994). Butterworth-Heineman, Oxford, U.K. 481 pages Google Scholar
Pfeffer, W.T., Hasrper, J.T., and O'Neel, S. Kinematic constraints on glacier contributions to 21st-century sea-level rise. Science 321, (2008). 1340–1343.Google Scholar
Reusch, D., and Hughes, T.J. Surface “waves” on Byrd Glacier. Antarctic Science 16, (2003). 547–555.CrossRefGoogle Scholar
Robin, G.deQ., and Weertman, J. Cyclic surging of glaciers. Journal of Glaciology 12, (1973). 3–18.Google Scholar
Robin, G.deQ., Swithinbank, C.W.M., and Smith, B.M.E. Radio-echo exploration of the Antarctic ice sheet. International Association of Scientific Hydrology 86, (1970). 97–115.Google Scholar
Sargent, A. (2009). “Modeling Ice Streams.�.�Ph. D. thesis, University of Maine, .Google Scholar
Schoof, C. Ice sheet grounding line dynamics: steady states, stability and hysteresis. Journal of Geophysical Research, Earth Surface 112, (2007). F03S28 Google Scholar
Schoof, C., and Hindmarsh, R.C.A. Thin-film flows with wall slip: an asymptotic analysis of higher order glacier flow models. Quaternary Journal of Mechanics and Applied Mathematics 63, 1 (2010). 73–114. http://dx.doi.org/10.1093/qjmam/hbp025Google Scholar
Scofield, J.P., Fastook, J.L., and Hughes, T. Evidence for a frozen bed, Byrd Glacier, Antarctica. Journal of Geophysical Research 96, 11 (1991). 649-11,655 Google Scholar
Siegert, M.J., Dowdeswell, J.A., Gorman, M.R., and McIntyre, N.F. An inventory of Antarctic subglacial lakes. Antarctic Science 8, (1996). 281–286.Google Scholar
Smith, B.E., Fricker, H.A., Joughin, I.R., and Tulaczyk, S.M. An inventory of active subglacial lakes in Antarctica detected by ICESat (2003–2008). Journal of Glaciology 55, (2009). 573–595.Google Scholar
Stearns, L.A., Smith, B.E., and Hamilton, G.S. Increased flow speed on a large East Antarctic outlet glacier due to subglacial floods. Nature Geoscience 1, (2008). 827–831.Google Scholar
Stuiver, M., Denton, G.H., Hughes, T.J., and Fastook, J.L. History of the marine ice sheet in West Antarctica during the last glaciation: a working hypothesis. Denton, G.H., and Hughes, T.J. The Last Great Ice Sheets. (1981). Wiley-Interscience, New York. 319–436.Google Scholar
Thomas, R.H. The creep of ice shelves: theory. Journal of Glaciology 12, 64 (1973). 45–53.Google Scholar
Thomas, R.H. The creep of ice shelves: interpretation of observed behavior. Journal of Glaciology 12, (1973). 55–70.Google Scholar
Thomas, R.H. Calving bay dynamics and ice sheet retreat up the St. Lawrence valley system. Géographie Physique et Quaternaire 31, (1977). 347–356.CrossRefGoogle Scholar
Thomas, R.H. Force-perturbation analysis of recent thinning and acceleration of Jakobshavns Isbrae, Greenland. Journal of Glaciology 50, (2004). 57–66.Google Scholar
Thomas, R.H., and Bentley, C.R. A model for Holocene retreat of the West Antarctic ice sheet. Quaternary Research 10, (1978). 150–170.CrossRefGoogle Scholar
Thomas, R.H., Frederick, E.B., Krabill, W.B., Manizade, S., and Martin, C. Recent changes on Greenland outlet glaciers. Journal of Glaciology 55, (2009). 147–162.Google Scholar
Van der Wal, R.S.W. et al. Large and rapid melt-induced velocity changes in the ablation zone of the Greenland ice sheet. Science 321, (2008). 111–113.Google Scholar
Weertman, J. Deformation of floating ice shelves. Journal of Glaciology 3, (1957). 38–42.Google Scholar
Weertman, J. On the sliding of glaciers. Journal of Glaciology 3, (1957). 33–38.Google Scholar
Weertman, J. Stability of the junction of an ice sheet and an ice shelf. Journal of Glaciology 13, (1974). 3–11.Google Scholar
Whillans, I.M., Chen, Y.H., van der Veen, C.J., and Hughes, T. Force budget III: Application to three-dimensional flow of Byrd Glacier, Antarctica. Journal of Glaciology 35, (1989). 68–80.Google Scholar
Wilch, E., and Hughes, T. Mapping basal thermal zones beneath the Antarctic ice sheet. Journal of Glaciology 46, 153 (2000). 297–310.Google Scholar