Controls on the basal water pressure in subglacial channels near the margin of the Greenland ice sheet

Journal of Glaciology

Volumn 51, Issue 174, 2005, Pages 443-450

  Ahlstrøm, Andreas P ^a   Mohr, Johan J ^a   Reeh, Niels ^a   Christensen, Erik Lintz ^a   Hooke, Roger LeB ^b  

^a TECHNICAL UNIVERSITY OF DENMARK   (Denmark)

^b UNIVERSITY OF MAINE   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

GLACIAL HYDROLOGY; ICE SHEET; SUBGLACIAL ENVIRONMENT;

ARCTIC; GREENLAND; GREENLAND ICE SHEET;

EID: 32644468378     PISSN: 00221430     EISSN: None     Source Type: Journal    
DOI: 10.3189/172756505781829214     Document Type: Article

References (35)

1. Ahlstrøm, A.P. 2003. Ice sheet ablation assessed by observation, remote sensing and modelling. (PhD thesis, University of Copenhagen.)
2. Ahlstrøm, A.P. and 6 others. 2002. Mapping of a hydrological ice-sheet drainage basin on the West Greenland ice-sheet margin from ERS-1/-2 SAR interferometry, ice-radar measurement and modelling. Ann. Glaciol., 34, 309-314.
3. Alley, R.B. and R.A. Bindschadler, eds. 2001. The West Antarctic ice sheet: behavior and environment. Washington, DC, American Geophysical Union. (Antarctic Research Series 77.)
4. Ambach, W., W. Rehwald, M. Blumthaler, H. Eisner and P. Brunner. 1988. Correspondence. Chernobyl fall-out on glaciers in the Austrian Alps. J. Glaciol., 34(117), 255-256.
5. Arnold, N., K. Richards, I. Willis and M. Sharp. 1998. Initial results from a distributed, physically based model of glacier hydrology. Hydrol. Process., 12, 191-219.
6. Björnsson, H. 1982. Drainage basins on Vatnajökull mapped by radio echo soundings. Nord. Hydrol., 13(4), 213-232.
7. Boon, S. and M. Sharp. 2003. The role of hydrologically-driven ice fracture in drainage system evolution on an Arctic glacier. Geophys. Res. Lett., 30(18), 1916. (10.1029/2003GL018034.)
8. Carr, J.R. 1995. Numerical analysis for the geological sciences. Englewood Cliffs, NJ, Prentice-Hall.
9. Christensen, E.L., N. Reeh, R. Forsberg, J.H. Jørgensen, N. Skou and K. Woelders. 2000. A low-cost glacier-mapping system. J. Glaciol., 46(154), 531-537.
10. Cutler, P.M. 1998. Modelling the evolution of subglacial tunnels due to varying water input. J. Glaciol., 44(148), 485-497.
11. Dahl-Jensen, D. and N.S. Gundestrup. 1987. Constitutive properties of ice at Dye 3, Greenland. International Association of Hydrological Sciences Publication 170 (Symposium at Vancouver 1987 - The Physical Basis of Ice Sheet Modelling), 31-43.
12. Dahl-Jensen, D. and S.J. Johnsen. 1986. Palaeotemperatures still exist in the Greenland ice sheet. Nature, 320(6059), 250-252.
13. Flowers, G.E. and G.K.C. Clarke. 1999. Surface and bed topography of Trapridge Glacier, Yukon Territory, Canada: digital elevation models and derived hydraulic geometry. J. Glaciol., 45(149), 165-174.
14. Flowers, G.E., H. Björnsson and F. Pálsson. 2003. New insights into the subglacial and periglacial hydrology of Vatnajökull, Iceland, from a distributed physical model. J. Glaciol., 49(165), 257-270.
15. Gogineni, S. and 9 others. 2001. Coherent radar ice thickness measurements over the Greenland ice sheet. J. Geophys. Res., 106(D24), 33,761-33,772.
16. Hagen, J.O., B. Etzelmüller and A.M. Nuttall. 2000. Runoff and drainage pattern derived from digital elevation models, Finsterwalderbreen, Svalbard. Ann. Glaciol., 31, 147-152.
17. Hock, R. 2003. Temperature index melt modelling in mountain areas. J. Hydrol., 282(1-4), 104-115.
18. Hock, R. and R.LeB. Hooke. 1993. Evolution of the internal drainage system in the lower part of the ablation area of Storglaciären, Sweden. Geol. Soc. Am. Bull., 105(4), 537-546.
19. Hooke, R.LeB., T. Laumann and J. Kohler. 1990. Subglacial water pressures and the shape of subglacial conduits. J. Glaciol., 36(122), 67-71.
20. Hubbard, B. and P. Nienow. 1997. Alpine subglacial hydrology. Quat. Sci. Rev., 16(9), 939-955.
21. Huybrechts, P., A. Letréguilly and N. Reeh. 1991. The Greenland ice sheet and greenhouse warming. Palaeogeogr., Palaeoclimatol., Palaeoecol., 89(4), 399-412.
22. Iken, A. and M. Truffer. 1997. The relationship between subglacial water pressure and velocity of Findelengletscher, Switzerland, during its advance and retreat. J. Glaciol., 43(144), 328-338.
23. Iken, A., K. Echelmeyer, W. Harrison and M. Funk. 1993. Mechanisms of fast flow in Jakobshavns Isbræ, West Greenland: Part I. Measurements of temperature and water level in deep boreholes. J. Glaciol., 39(131), 15-25.
24. Kamb, B. 1987. Glacier surge mechanism based on linked cavity configuration of the basal water conduit system. J. Geophys. Res., 92(B9), 9083-9100.
25. Krabill, W.B. and 9 others. 2000. Greenland ice sheet: high-elevation balance and peripheral thinning. Science, 289(5478), 428-430.
26. Ohmura, A. 2001. Physical basis for the temperature-based melt-index method. J. Appl. Meteorol., 40(4), 753-761.
27. Paterson, W.S.B. 1994. The physics of glaciers. Third edition. Oxford, etc., Elsevier.
28. Röthlisberger, H. 1972. Water pressure in intra- and subglacial channels. J. Glaciol., 11(62), 177-203.
29. Shreve, R.L. 1972. Movement of water in glaciers. J. Glaciol., 11(62), 205-214.
30. Thomas, R.H., W. Abdalati, E. Frederick, W.B. Krabill, S. Manizade and K. Steffen. 2003. Investigation of surface melting and dynamic thinning on Jakobshavn Isbræ, Greenland. J. Glaciol., 49(165), 231-239.
31. Thomsen, H.H. and O.B. Olesen. 1990. Continued glaciological investigations with respect to hydropower and ice-climate relationships, at Pâkitsoq, Jakobshavn, West Greenland. Rapp. Grønl. Geol. Undersøgelse 148, 83-86.
32. Thomsen, H.H., L. Thorning and R.J. Braithwaite. 1988. Glacier-hydrological conditions on the Inland Ice north-east of Jacobshavn/llulissat, West Greenland. Rapp. Grønl. Geol. Undersøgelse 138.
33. Thorning, L. and E. Hansen. 1987. Electromagnetic reflection survey 1986 at the Inland Ice margin of the Pâkitsoq basin, central West Greenland. Rapp. Grønl. Geol. Undersøgelse 135, 87-95.
34. Van de Wal, R.S.W. 1992. Ice and climate. (PhD thesis, Utrecht University.)
35. Walder, J.S. and A. Fowler. 1994. Channelized subglacial drainage over a deformable bed. J. Glaciol., 40(134), 3-15.