Ice-shelf tidal flexure and subglacial pressure variations

Earth and Planetary Science Letters

Volumn 361, Issue , 2013, Pages 422-428

  Walker, Ryan T ^a,d   Parizek, Byron R ^b   Alley, Richard B ^a   Anandakrishnan, Sridhar ^a   Riverman, Kiya L ^a   Christianson, Knut ^c  

^a PENNSYLVANIA STATE UNIVERSITY   (United States)

^b PENNSYLVANIA STATE UNIVERSITY   (United States)

^c ST OLAF COLLEGE   (United States)

^d NASA GODDARD SPACE FLIGHT CENTER   (United States)

Author keywords

Ice shelf; Subglacial hydrology; Tidal flexure

Indexed keywords

BASAL PRESSURE; ELASTIC FOUNDATION; FLOATING ICE; GROUNDING LINE; HIGH TIDES; ICE SHELVES; PRESSURE VARIATIONS; RADAR OBSERVATIONS; RADAR REFLECTIVITIES; SUBGLACIAL HYDROLOGY; TIDAL FLEXURE; VISCOELASTIC BEAMS; WATER SYSTEM;

GLACIAL GEOLOGY; SEAWATER;

ICE;

FLOATING ICE; GROUNDING LINE; ICE SHELF; ICE STREAM; OCEAN TIDE; SUBGLACIAL ENVIRONMENT;

EID: 84872293727     PISSN: 0012821X     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.epsl.2012.11.008     Document Type: Article

References (48)

1. Anandakrishnan S., Catania G.A., Alley R.B., Horgan H.J. Discovery of till deposition at the grounding line of Whillans Ice Stream. Science 2007, 315:1835-1838. 10.1126/science.1138393.
2. Anandakrishnan S., Voigt D.E., Alley R.B., King M.A. Ice stream D flow speed is strongly modulated by the tide beneath the Ross Ice Shelf. Geophys. Res. Lett. 2003, 30:1361. 10.1029/2002GL016329.
3. Bindschadler R.A., King M.A., Alley R.B., Anandakrishnan S., Padman L. Tidally controlled stick-slip discharge of a West Antarctic ice stream. Science 2003, 301(5636):1087-1089.
4. Bindschadler R., Choi H., Wichlacz A., Bingham R., Bohlander J., Brunt K., Corr H., Drews R., Fricker H., Hall M., Hindmarsh R., Kohler J., Padman L., Rack W., Rotschky G., Urbini S., Vornberger P., Young N. Getting around Antarctica. new high-resolution mappings of the grounded and freely-floating boundaries of the Antarctic ice sheet created for the International Polar Year. Cryos. 2011, 5:569-588. 10.5194/tc-5-569-2011.
5. Brunt K.M., Fricker H.A., Padman L., Scambos T.A., O'Neel S. Mapping the grounding zone of the Ross Ice Shelf, Antarctica, using ICESat laser altimetry. Ann. Glaciol. 2010, 51:71-79.
6. Brunt K.M., Fricker H.A., Padman L. Analysis of ice plains of the FilchnerRonne Ice Shelf, Antarctica, using ICESat laser altimetry. J. Glaciol. 2011, 57:965-975.
7. Cuffey K.M., Paterson W.S.B. The Physics of Glaciers 2010, Elsevier. 4th ed.
8. Dorf R.C. CRC Handbook of Engineering Tables 2004, CRC Press.
9. Fricker H.A., Borsa A., Minster B., Carabajal C., Quinn K., Bills B. Assessment of ICESat performance at the Salar de Uyuni, Bolivia. Geophys. Res. Lett. 2005, 32:L21S06. 10.1029/2005GL023423.
10. Fricker H.A., Coleman R., Padman L., Scambos T.A., Bohlander J., Brunt K.M. Mapping the grounding zone of the Amery Ice Shelf, East Antarctica using InSAR, MODIS and ICESat. Antarct. Sci. 2009, 21(5):515-532.
11. Gudmundsson G.H. Tides and the flow of Rutford Ice Stream, West Antarctica. J. Geophys. Res. 2007, 112:F04007. 10.1029/2006JF000731.
12. Gudmundsson G.H. Ice-stream response to ocean tides and the form of the basal sliding law. Cryos. 2011, 5:259-270. 10.5194/tc-5-259-2011.
13. Heinert M., Riedel B. Parametric modelling of the geometrical ice-ocean interaction in the Ekstroemisen grounding zone based on short time-series. Geophys. J. Int. 2007, 169:407-420.
14. Hibbeler R.C. Mechanics of Materials 2000, Prentice Hall. 4th ed.
15. Holdsworth G. Flexure of a floating ice tongue. J. Glaciol. 1969, 8:385-397.
16. Holdsworth G. Tidal interaction with ice shelves. Ann. Geophys. 1977, 33:133-146.
17. Holland P.R., Jenkins A., Holland D.M. The response of ice shelf basal melting to variations in ocean temperature. J. Clim. 2008, 21:2258-2572.
18. Horgan H.J., Anandakrishnan S. Static grounding lines and dynamic ice streams. evidence from the Siple Coast, West Antarctica. Geophys. Res. Lett. 2006, 33(18):L18502. 10.1029/2006GL027091.
19. Jacobel R.W., Bindschadler R.A. Studies of the grounding line location on Ice Streams D and E, Antarctica. Ann. Glaciol. 1994, 20:39-42.
20. Jones, G., 1997. Analysis of Beams on Elastic Foundations, Telford.
21. King M. Rigorous GPS data-processing strategies for glaciological applications. J. Glaciol. 2004, 50(171):601-607.
22. King M.A., Murray T., Smith A.M. Non-linear responses of Rutford Ice Stream, Antarctica, to semi-diurnal and diurnal tidal forcing. J. Glaciol. 2010, 56:167-176.
23. Lekarp F., Isacsson U., Dawson A. State of the art II. permanent strain response of unbound aggregates. J. Transp. Eng. 2000, 126(1):76-83. 10.1061/(ASCE)0733-947X(2000)126:1(76).
24. Lingle C.S., Hughes T.J., Kollmeyer R.C. Tidal flexure of Jakobshavns Glacier, West Greenland. J. Geophys. Res. 1981, 86:3960-3968.
25. MacGregor J.A., Anandakrishnan S., Catania G., Winebrenner D.P. The grounding zone of the Ross Ice Shelf, West Antarctica, from ice-penetrating radar. J. Glaciol. 2011, 57(205):917-928. 10.3189/02214311798043780.
26. Matsuoka K., Pattyn F., Callens D., Conway H. Radar characterization of the basal interface across the grounding zone of an ice-rise promontory in East Antarctica. Ann. Glaciol. 2012, 53(60):29-34. 10.3189/2012AoG60A106.
27. Murray T., Clarke G.K.C. Black-box modeling of the subglacial water system. J. Geophys. Res. 1995, 100(B7):10231-10245.
28. Murray T., Smith A.M., King M.A., Weedon G.P. Ice flow modulated by tides at up to annual periods at Rutford Ice Stream, West Antarctica. Geophys. Res. Lett. 2007, 34(18):L18503. 10.1029/2007GL031207.
29. Nautiyal B.D. Introduction to Structural Analysis 2001, New Age International.
30. Pimentel S., Flowers G.E. A numerical study of hydrologically driven glacier dynamics and subglacial flooding. Proc. R. Soc. Lond. Ser. A 2011, 467:537-558.
31. Rathbun A.P., Marone C., Alley R.B., Anandakrishnan S. Laboratory study of the frictional rheology of sheared till. J. Geophys. Res. 2008, 113:F02020. 10.1029/2007JF000815.
32. Reeh N., Christensen E.L., Mayer C., Olesen O.B. Tidal bending of glaciers. a linear viscoelastic approach. Ann. Glaciol. 2003, 37:83-89.
33. Rignot E. Hinge-line migration of Petermann Gletscher, north Greenland, detected using satellite-radar interferometry. J. Glaciol. 1998, 44(148):469-476.
34. Rignot E., Mouginot J., Scheuchl B. Antarctic grounding line mapping from differential satellite radar interferometry. Geophys. Res. Lett. 2011, 38:L10504. 10.1029/2011GL047109.
35. Robin, G.de.Q., 1958. Glaciology III, Seismic shooting and related investigations. In: Norwegian-British-Swedish Antarctic Expedition, 1949-1952, Scientific Results, vol. V, Norsk Polarinstitut.
36. Sayag R., Worster M.G. Elastic response of a grounded ice sheet coupled to a floating ice shelf. Phys. Rev. E 2011, 84:036111. 10.1103/PhysRevE.84.036111.
37. Scambos T.A., Haran T.M., Fahnestock M.A., Painter T.H., Bohlander J. MODIS-based Mosaic of Antarctica (MOA) data sets. continent-wide surface morphology and snow grain size. Remote Sensing Environ. 2007, 111(2-3):242-257. 10.1016/j.rse.2006.12.020.
38. Schmeltz M., Rignot E., MacAyeal D. Tidal flexure along ice-sheet margins. comparison of InSAR with an elastic-plate model. Ann. Glaciol. 2002, 34:202-208.
39. Schoof C. Ice-sheet acceleration driven by melt supply variability. Nature 2010, 468:803-806.
40. Shreve R.L. Movement of water in glaciers. J. Glaciol. 1972, 11(62):205-214.
41. Smith A.M. The use of tiltmeters to study the dynamics of Antarctic ice-shelf grounding lines. J. Glaciol. 1991, 37:51-58.
42. Turcotte, D.L., Schubert, G., 2002. Geodynamics, 2nd ed. Cambridge.
43. Vaughan D.G. Tidal flexure at ice shelf margins. J. Geophys. Res. 1995, 100(B4):6213-6224.
44. Walder J.S., Fowler A. Channelized subglacial drainage over a deformable bed. J. Glaciol. 1994, 40(134):3-15.
45. Walter J.I., Brodsky E.E., Tulaczyk S., Schwartz S.Y., Pettersson R. Transient slip events from near-field seismic and geodetic data on a glacier fault, Whillans Ice Plain, West Antarctica. J. Geophys. Res. 2011, 116:F01021. 10.1029/2010JF001754.
46. Weertman J. General theory of water flow at the base of a glacier or ice sheet. Rev. Geophys. Space Phys. 1972, 10:287-333.
47. Winberry J.P., Anandakrishnan S., Alley R.B., Bindschadler R.A., King M.A. Basal mechanics of ice streams. insights from the stick-slip motion of Whillans Ice Stream, West Antarctica. J. Geophys. Res. 2009, 114:F01016. 10.1029/2008JF001035.
48. Winberry J.P., Anandakrishnan S., Wiens D.A., Alley R.B., Christianson K. Dynamics of stick-slip motion, Whillans Ice Stream, Antarctica. Earth Planet. Sci. Lett. 2011, 305:283-289. 10.1016/j.epsl.2011.02.052.