Antarctic bedrock topography uncertainty and ice sheet stability

Geophysical Research Letters

Volumn 42, Issue 13, 2015, Pages 5372-5377

  Gasson, E ^a   DeConto, R ^a   Pollard, D ^b  

^a UNIVERSITY OF MASSACHUSETTS   (United States)

^b PENNSYLVANIA STATE UNIVERSITY   (United States)

Author keywords

Antarctic ice sheets; Bedmap2; bedrock topography

Indexed keywords

DATA ACQUISITION; GLACIERS; SEA LEVEL; TOPOGRAPHY; UNCERTAINTY ANALYSIS;

ANTARCTIC ICE SHEETS; BEDMAP2; ELEVATION DATA; FUTURE IMPROVEMENTS; ICE SHEET MODELS; SEA LEVEL RISE; TOPOGRAPHIC NOISE; WARM CLIMATES;

ICE;

AMPLITUDE; BEDROCK; CLIMATE FORCING; CLIMATE VARIATION; DATA ACQUISITION; DATA SET; ENSEMBLE FORECASTING; GLACIER RETREAT; ICE SHEET; NOISE; PLIOCENE; SEA LEVEL; UNCERTAINTY ANALYSIS;

ANTARCTIC ICE SHEET; ANTARCTICA;

EID: 84938151212     PISSN: 00948276     EISSN: 19448007     Source Type: Journal    
DOI: 10.1002/2015GL064322     Document Type: Article

References (28)

1. Bassis, J.N., and, C.C. Walker, (2011), Upper and lower limits on the stability of calving glaciers from the yield strength envelope of ice, Proc. R. Soc. A, 468 (2140), 913-931, doi: 10.1098/rspa.2011.0422.
2. Collins, M. R., et al., (2013), Chapter 12: Long-term climate change: Projections, commitments and irreversibility, in Climate Change 2013: The Physical Science Basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change, edited by, T.F. Stocker, et al., pp. 1029-1136, Cambridge Univ. Press, Cambridge, U.K. and New York.
3. Cook, C. P., et al., (2013), Dynamic behaviour of the East Antarctic ice sheet during Pliocene warmth, Nat. Geosci., 6 (9), 765-769, doi: 10.1038/ngeo1889.
4. DeConto, R.M., D. Pollard, and, D. Kowalewski, (2012), Modeling Antarctic ice sheet and climate variations during Marine Isotope Stage 31, Global Planet. Change, 88-89, 45-52.
5. Dowsett, H.J., M.M. Robinson, and, K.M. Foley, (2009), Pliocene three-dimensional global ocean temperature reconstruction, Clim. Past, 5, 769-783.
6. Fretwell, P., et al., (2013), Bedmap2: Improved ice bed, surface and thickness datasets for Antarctica, Cryosphere, 7 (1), 375-393, doi: 10.5194/tc-7-375-2013.
7. Gladstone, R.M., A.J. Payne, and, S.L. Cornford, (2012), Resolution requirements for grounding-line modelling: Sensitivity to basal drag and ice-shelf buttressing, Ann. Glaciol., 53 (60), 97-105, doi: 10.3189/2012AoG60A148.
8. Gomez, N., J.X. Mitrovica, P. Huybers, and, P.U. Clark, (2010), Sea level as a stabilizing factor for marine-ice-sheet grounding lines, Nat. Geosci., 3, 850-853, doi: 10.1038/NGEO1012.
9. Holland, P.R., A. Jenkins, and, D.M. Holland, (2008), The response of ice shelf basal melting to variations in ocean temperature, J. Clim., 21, 2558-2572.
10. 2 greenhouse effect: A threat of disaster, Nature, 271, 321-325.
11. Miller, K. G., et al., (2012), High tide of the warm Pliocene: Implications of global sea level for Antarctic deglaciation, Geology, 40 (5), 407-410, doi: 10.1130/G32869.1.
12. Naish, T.R., and, G.S. Wilson, (2009), Constraints on the amplitude of mid-Pliocene (3.6-2.4Ma) eustatic sea level fluctuations from the New Zealand shallow-marine sediment record, Philos. Trans. R. Soc. A, 367 (1886), 169-87, doi: 10.1098/rsta.2008.0223.
13. Naish, T., et al., (2009), Obliquity-paced Pliocene West Antarctic ice sheet oscillations, Nature, 458 (7236), 322-328, doi: 10.1038/nature07867.
14. Nick, F.M., C.J. van der Veen, A. Vieli, and, D.I. Benn, (2010), A physically based calving model applied to marine outlet glaciers and implications for the glacier dynamics, J. Glaciol., 56 (199), 781-794, doi: 10.3189/002214310794457344.
15. Pal, J., et al., (2007), Regional climate modeling for the developing world: The ICTP RegCM3 and RegCNET, Bull. Am. Meteorol. Soc., 88, 1395-1409.
16. Pattyn, F., et al., (2013), Grounding-line migration in plan-view marine ice-sheet models: Results of the ice2sea MISMIP3d intercomparison, J. Glaciol., 59 (215), 410-422.
17. Pollard, D., and, R.M. DeConto, (2012a), Description of a hybrid ice sheet-shelf model, and application to Antarctica, Geosci. Model Dev., 5 (5), 1273-1295, doi: 10.5194/gmd-5-1273-2012.
18. Pollard, D., and, R.M. DeConto, (2012b), A simple inverse method for the distribution of basal sliding coefficients under ice sheets, applied to Antarctica, Cryosphere, 6, 953-971, doi: 10.5194/tc-6-953-2012.
19. Pollard, D., R.M. DeConto, and, R.B. Alley, (2015), Potential Antarctic Ice Sheet retreat driven by hydrofracturing and ice cliff failure, Earth Planet. Sci. Lett., 412, 112-121, doi: 10.1016/j.epsl.2014.12.035.
20. Pritchard, H.M., (2014), Bedgap: Where next for Antarctic subglacial mapping?, Antarct. Sci., 26 (6), 742-757, doi: 10.1017/S095410201400025X.
21. Raymo, M.E., J.X. Mitrovica, M.J. O'Leary, R.M. DeConto, and, P.J. Hearty, (2011), Departures from eustasy in Pliocene sea-level records, Nat. Geosci., 4 (5), 328-332, doi: 10.1038/ngeo1118.
22. Schoof, C., (2007), Ice sheet grounding line dynamics: Steady states, stability, and hysteresis, J. Geophys. Res., 112, F03S28, doi: 10.1029/2006JF000664.
23. 2 records, Earth. Planet. Sci. Lett., 292 (1-2), 201-211, doi: 10.1016/j.epsl.2010.01.037.
24. Sun, S., S.L. Cornford, Y. Liu, and, J.C. Moore, (2014), Dynamic response of Antarctic ice shelves to bedrock uncertainty, Cryosphere Discuss., 8 (1), 479-508, doi: 10.5194/tcd-8-479-2014.
25. 2 from the GENESIS version-2 global climate model, J. Clim., 10, 871-900.
26. Weertman, J., (1974), Stability of the junction between an ice sheet and an ice shelf, J. Glaciol., 13 (67), 3-11.
27. Wilson, D.S., S.S.R.R. Jamieson, P.J. Barrett, G. Leitchenkov, K. Gohl, and, R.D. Larter, (2012), Antarctic topography at the Eocene-Oligocene boundary, Palaeogeogr. Palaeoclimatol. Palaeoecol., 335-336, 24-34, doi: 10.1016/j.palaeo.2011.05.028.
28. Young, D. A., et al., (2011), A dynamic early East Antarctic Ice Sheet suggested by ice-covered fjord landscapes, Nature, 474 (7349), 72-75.