Mechanisms of basal ice formation in polar glaciers: An evaluation of the apron entrainment model

Journal of Geophysical Research: Earth Surface

Volumn 113, Issue 2, 2008, Pages

  Fitzsimons, Sean ^a   Webb, Nicola ^a   Mager, Sarah ^a   MacDonell, Shelley ^a   Lorrain, Regi ^b   Samyn, Denis ^b  

^a UNIVERSITY OF OTAGO   (New Zealand)

^b UNIVERSITÉ LIBRE DE BRUXELLES   (Belgium)

Author keywords

[No Author keywords available]

Indexed keywords

BASAL ICE; ENTRAINMENT; FORMATION MECHANISM; ICE MARGIN; ICE MECHANICS; ISOTOPIC ANALYSIS; PERMAFROST; STRAIN RATE; SUBGLACIAL DEPOSIT; VALLEY GLACIER;

ANTARCTICA; EAST ANTARCTICA; MCMURDO DRY VALLEYS; ROSS SEA; SOUTHERN OCEAN; VICTORIA LAND; VICTORIA UPPER GLACIER;

EID: 50849097884     PISSN: None     EISSN: 21699011     Source Type: Journal    
DOI: 10.1029/2006JF000698     Document Type: Article

References (38)

1. Briner, J. P., G. H. Miller, P. T. Davis, P. R. Bierman, and M. Caffee (2003), Last Glacial Maximum ice sheet dynamics in arctic Canada inferred from young erratics perched on ancient tors, Quat. Sci. Rev., 22, 437-444, doi:10.1016/S0277-3791(03)00003-9.
2. Briner, J. P., G. H. Miller, P. T. Davis, and R. C. Finkel (2006), Cosmogenic radionuclides from fiord landscapes support differential erosion by ice sheets, Geol. Soc. Am. Bull., 118, 406-420, doi:10.1130/B25716.1.
3. Chinn, T. J. H. (1991), Polar glacier margin and debris features, Mem. Soc. Geol. It., 46, 25-55.
4. Christoffersen, P., and S. Tulaczyk (2003), Thermodynamics of basal freeze-on: Predicting basal and subglacial signatures of stopped ice streams and interstream ridges, Ann. Glaciol., 36, 233-243.
5. Coglan, P. M., P. R. Bierman, D. M. Mickelson, and M. Caffee (2002), Variation in glacial erosion near the southern margin of the Laurentide Ice Sheet, south-central Wisconsin, USA: Implications for cosmogenic dating of glacial terrains, Geol. Soc. Am. Bull., 114, 1581-1591.
6. Cuffey, K. M., H. Conway, A. M. Gades, B. Hallet, R. Lorrain, J. P. Severinghaus, E. J. Steig, B. Vaughn, and J. W. C. White (2000a), Entrainment at cold glacier beds, Geology, 28, 351-354.
7. Cuffey, K. M., H. Conway, A. Gades, B. Hallet, C. F. Raymond, and S. Whitlow (2000b), Deformation properties of subfreezing glacier ice: Role of crystal size, chemical impurities, and rock particles inferred from in situ measurements, J. Geophys. Res., 105, 27,895-27,916.
8. Donnelly, T., S. Waldron, A. Tait, J. Dougans, and S. Bearhop (2001), Hydrogen isotope analysis of natural abundance and deuterium-enriched waters by reduction over chromium on-line to a dynamic dual inlet isotoperatio mass spectrometer, Rapid Commun. Mass Spectrom., 15, 1297-1303.
9. Evans, D. (1989), Apron entrainment at the margins of sub-polar glaciers, north-west Ellesmere Island Canadian high arctic, J. Glaciol., 35, 317-324.
10. Farquhar, G. D., B. K. Henry, and J. M. Styles (1997), A rapid on-line technique for determination of oxygen isotope composition of nitrogen-containing organic matter and water, Rapid Commun. Mass Spectrom., 11, 1554-1560.
11. Fitzsimons, S. (1996), Formation of thrust-block moraines at the margins of dry-based glaciers, South Victoria Land, Antarctica, Ann. Glaciol., 22, 68-74.
12. Fitzsimons, S. (2006), Mechanical behaviour and structure of the debris-rich basal ice layer, in Glacier Science and Environmental Change, edited by P. Knight, pp. 329-335, Blackwell Sci., Maiden, Mass.
13. Fitzsimons, S., R. Lorrain, and M. Vandergoes (2000), Behaviour of sub-glacial sediment and basal ice in a cold glacier, Geol. Soc. Spec. Publ., 176, 181-190.
14. Goldthwait, R. P. (1971), Restudy of Red Rock ice cliff in Nunatarssuaaq, Greenland, CRREL Tech. Rep. 224, 27 pp., U.S. Army Corps of Eng., Cold Reg. Res. and Eng. Lab., Hanover, N.H.
15. Hambrey, M. J., and F. Muller (1978), Structures and ice deformation in the White Glacier, Axel Heiberg Island, Northwest territories, Canada, J. Glaciol., 20, 41-66.
16. Hambrey, M. J., A. G. Milnes, and H. Siegenthaler (1980), Dynamics and structure of Griesgletscher, Switzerland, J. Glaciol., 25, 215-228.
17. Holdsworth, G. (1969), Structural geology of Meserve Glacier, Antarctica, Antarct. J. U.S., 4, 126-128.
18. Holdsworth, G. (1974), Meserve Glacier, Wright Valley, Antarctica: part I. Basal processes, Rep. 37, 104 pp. Inst. of Polar Stud., Ohio State Univ., Columbus, Ohio.
19. Hooke, R. L. (1973), Flow near the margin of the Bames Ice Cap, and the development of ice-cored moraines, Geol. Soc. Am. Bull., 84, 3929-3948.
20. Hubbard, B., and M. J. Sharp (1989), Basal ice formation and deformation: A review, Prog. Phys. Geogr., 13, 529-558.
21. Jouzel, J., and R. A. Souchez; (1982), Melting-refreezing at the glacier sole and the isotopic composition of the ice, J. Glaciol., 28, 35-42.
22. Kleman, J. (1994), Preservation of landforms under ice sheets and ice caps, Geomorphology, 9, 19-32.
23. Kleman, J., C. Hattestrand, A. P. Stroeven, K. N. Jansson, H. De Angelis, and I. Borgström (2006), Changing glaciers and their role in earth surface interactions, in Glacier Science and Environmental Change, edited by P. Knight, pp. 199-200, Blackwell Sci., Malden, Mass.
24. Knight, P. G. (1997), The basal layer of glaciers and ice sheets, Quat. Sci. Rev., 16, 975-993.
25. Koerner, R. M. (1989), Ice core evidence for extensive melting of the Greenland ice sheet in the Last Interglacial, Science, 244, 964-968.
26. Lehmann, M., and U. Siegenthaler (1991), Equilibrium oxygen- and hydrogen-isotope fractionation between ice and water, J. Glaciol., 37, 23-26.
27. Lorrain, R., S. Fitzsimons, M. Vandergoes, and M. Stievenard (1999), Ice composition evidence for the formation of basal ice from lake water beneath a cold-based Antarctic glacier, Ann. Glaciol., 28, 277-281.
28. Ramsay, J. G. (1967), Folding and Faulting of Rocks, 568 pp., McGraw-Hill, New York.
29. Rozanski, K., L. Araguds-Araguds, and R. Gonfiantim (1993), Isotopic patterns in modem global precipitation, in Climate Change in Continental Isotopic Records, Geophys. Monogr Ser., vol. 78, edited by P. K. Swart et al., pp. 1-36, AGU, Washington, D.C.
30. Sharp, M. (1984), Annual moraine ridges at Skalafellsjokull, south-east Iceland, J. Glaciol., 30, 82-93.
31. Sharp, M., W. Lawson, and R. S. Anderson (1988), Tectonic processes in a surge-type glacier, J. Struct. Geol., 10, 499-515.
32. Sharp, M., J. Jouzel, B. Hubbard, and W. Lawson (1994), The character, structure and origin of the basal ice layer of a surge-type glacier, J. Glaciol., 40, 327-340.
33. Shaw, J. (1977), Till body morphology and structure related to glacier flow, Boreas, 6, 189-201.
34. 18O of water and ice during freezing, J. Glaciol., 30, 369-372.
35. Souchez, R. and R. Lorrain (2006). The environmental significance of deuterium excess in meteoric and non-meteoric Antarctic ice, in Glacier Science and Environmental Change, edited by P. Knight, pp. 179-184, Blackwell Sci., Malden, Mass.
36. Souchez, R., D. Samyn, R. Lorrain, F. Pattyn, and S. Fitzsimons (2004), An isotopic model for basal freeze-on associated with subglacial upward flow of pore water, Geophys. Res. Lett., 31, L02401, doi:10.1029/ 2003GL018861.
37. Sugden, D. (2006), Changing glaciers and their role in earth surface interactions, in Glacier Science and Environmental Change, edited by P. Knight, pp. 188-191, Blackwell Sci., Malden, Mass.
38. Weertman, J. (1961), Mechanism for the formation of inner moraines found near the edge of cold ice caps and ice sheets, J. Glaciol., 3, 965-978.