Elastic dynamics and tidal migration of grounding lines modify subglacial lubrication and melting

Geophysical Research Letters

Volumn 40, Issue 22, 2013, Pages 5877-5881

  Sayag, R ^a   Worster, M Grae ^a  

^a UNIVERSITY OF CAMBRIDGE   (United Kingdom)

Author keywords

grounding line migration; ice sheet dynamics; ice sheet mass balance; subglacial hydrology; subglacial lubrication

Indexed keywords

DEFORMABLE FOUNDATIONS; EFFECTIVE ELASTIC PROPERTY; ELASTIC MODELING; GROUNDING LINE; ICE SHEET DYNAMICS; MASS BALANCE; OCEAN THERMALS; SUBGLACIAL HYDROLOGY;

DYNAMICS; ELASTICITY; GLACIERS; LUBRICATION; MELTING; REMOTE SENSING;

ICE;

CRYOSPHERE; GROUNDING LINE; ICE SHEET; ICE SHELF; MELTING; REMOTE SENSING; SUBGLACIAL ENVIRONMENT; TIDAL CYCLE;

EID: 84887738899     PISSN: 00948276     EISSN: 19448007     Source Type: Journal    
DOI: 10.1002/2013GL057942     Document Type: Article

References (26)

1. Anandakrishnan, S., D. E. Voigt, R. B. Alley, and, M. A. King, (2003), Ice stream D flow speed is strongly modulated by the tide beneath the Ross Ice Shelf, Geophys. Res. Lett., 30 (7), 1361, doi: 10.1029/2002GL016329.
2. Anandakrishnan, S., G. A. Catania, R. B. Alley, and, H. J. Horgan, (2007), Discovery of till deposition at the grounding line of Whillans Ice Stream, Science, 315 (5820), 1835-1838.
3. Bell, F., (2000), Engineering Properties of Soils and Rocks, 482p. 4th edn, Blackwell Science, Oxford, U. K., Malden, Mass.
4. Bindschadler, R. A., M. A. King, R. B. Alley, S. Anandakrishnan, and, L. Padman, (2003), Tidally controlled stick-slip discharge of a West Antarctic ice, Science, 301 (5636), 1087-1089.
5. Brunt, K. M., H. A. Fricker, and, L. Padman, (2011), Analysis of ice plains of the Filchner-Ronne Ice Shelf, Antarctica, using ICESat laser altimetry, J. Glaciol., 57 (205), 965-975.
6. Fricker, H. A., and, L. Padman, (2006), Ice shelf grounding zone structure from ICESat laser altimetry, Geophys. Res. Lett., 33, L15502, doi: 10.1029/2006GL026907.
7. Gammon, P. H., H. Kiefte, M. J. Clouter, and, W. W. Denner, (1983), Elastic constants of artificial and natural ice samples by Brillouin spectroscopy, J. Glaciol., 29 (103), 433-460.
8. Gudmundsson, G. H., (2006), Fortnightly variations in the flow velocity of Rutford Ice Stream, West Antarctica, Nature, 444 (7122), 1063-1064.
9. Gudmundsson, G. H., (2011), Ice-stream response to ocean tides and the form of the basal sliding law, Cryosphere, 5 (1), 259-270.
10. Holdsworth, G., (1977), Tidal interaction with ice shelves, Ann. Geophys., 33 (1-2), 133-146.
11. Jacobel, R. W., A. Robinson, and, R. A. Bindschadler, (1994), Studies of the grounding-line location on Ice Streams D and E, Antarctica, Ann. Glaciol., 20 (1), 39-42.
12. Jenkins, A., and, C. S. M. Doake, (1991), Ice-ocean interaction on Ronne Ice Shelf, Antarctica, J. Geophys. Res., 96 (C1), 791-813.
13. Jenkins, A., H. F. J. Corr, K. W. Nicholls, C. L. Stewart, and, C. S. M. Doake, (2006), Interactions between ice and ocean observed with phase-sensitive radar near an Antarctic ice-shelf grounding line, J. Glaciol., 52 (178), 325-346.
14. King, E. C., R. C. A. Hindmarsh, and, C. R. Stokes, (2009), Formation of mega-scale glacial lineations observed beneath a West Antarctic ice stream, Nat. Geosci., 2 (8), 585-588.
15. Landau, L., and, E. Lifshitz, (1970), Theory of Elasticity, 165p. 2nd ed., vol. 7, Pergamon, Oxford, U. K.
16. Reeh, N., E. Christensen, C. Mayer, and, O. Olesen, (2003), Tidal bending of glaciers: A linear viscoelastic approach, Ann. Glaciol., 37, 83-89.
17. Rignot, E., (1996), Tidal motion, ice velocity and melt rate of Petermann Gletscher, Greenland, measured from radar interferometry, J. Glaciol., 42 (142), 476-485.
18. Rignot, E., (1998), Radar interferometry detection of hinge-line migration on Rutford Ice Stream and Carlson Inlet, Antarctica, Ann. Glaciol., 27, 25-32.
19. Rignot, E., J. Mouginot, and, B. Scheuchl, (2011), Antarctic grounding line mapping from differential satellite radar interferometry, Geophys. Res. Lett., 38, L10504, doi: 10.1029/2011GL047109.
20. Rignot, E., S. Jacobs, J. Mouginot, and, B. Scheuchl, (2013), Ice-shelf melting around Antarctica, Science, 341 (6143), 266-270.
21. Sayag, R., and, M. G. Worster, (2011), Elastic response of a grounded ice sheet coupled to a floating ice shelf, Phys. Rev. E, 84, 036111.
22. Schmeltz, M., E. Rignot, and, D. Macayeal, (2002), Tidal flexure along ice-sheet margins: Comparison of InSAR with an elastic-plate model, Ann. Glaciol., 34, 202-208.
23. Sykes, H. J., T. Murray, and, A. Luckman, (2009), The location of the grounding zone of Evans Ice Stream, Antarctica, investigated using SAR interferometry and modelling, Ann. Glaciol., 50 (52), 35-40.
24. Turcotte, D. L., and, G. Schubert, (2002), Geodynamics, 456p. 2nd ed., Cambridge Univ. Press, Cambridge.
25. Vaughan, D. G., (1995), Tidal flexure at ice shelf margins, J. Geophys. Res., 100 (B4), 6213-6224.
26. Walker, R. T., B. R. Parizek, R. B. Alley, S. Anandakrishnan, K. L. Riverman, and, K. Christianson, (2013), Ice-shelf tidal flexure and subglacial pressure variations, Earth Planet. Sci. Lett., 361, 422-428.