Progressive unpinning of Thwaites Glacier from newly identified offshore ridge: Constraints from aerogravity

Geophysical Research Letters

Volumn 38, Issue 20, 2011, Pages

  Tinto, K J ^a   Bell, R E ^a  

^a Department of Earth and Environmental Sciences   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

BATHYMETRY; BRIDGE PIERS; GLACIERS;

FLOATING ICE; GRAVITY DATA; GROUNDING LINE; ICE FLOW; ICE SHELVES; KEY CONTROL; MASS IMBALANCE; REGION-BASED; RESTRICTED FLOWS; UNCONFINED FLOW;

ICE;

AIRBORNE SURVEY; BATHYMETRY; DATA SET; GLACIER DYNAMICS; GLACIER MASS BALANCE; GLACIER RETREAT; GLACIOLOGY; GROUNDING LINE; ICE FLOW; ICE SHELF; ICE THICKNESS; NUMERICAL MODEL; OFFSHORE APPLICATION; SEA ICE; SUBGLACIAL ENVIRONMENT; TOPOGRAPHY;

ANTARCTICA; BYRD GLACIER; EAST ANTARCTICA; THWAITES GLACIER; WEST ANTARCTICA;

EID: 80455155228     PISSN: 00948276     EISSN: None     Source Type: Journal    
DOI: 10.1029/2011GL049026     Document Type: Article

References (28)

1. Allen, C. (2009), IceBridge MCoRDS L2 ice thickness, 11.18.09, digital media, Natl. Snow and Ice Data Cent., Boulder, Colo.
2. Andersen, O. B., and P. Knudsen (2009), DNSC08 mean sea surface and mean dynamic topography models, J. Geophys. Res., 114, C11001, doi:10.1029/ 2008JC005179.
3. Cochran, J. R., and R. E. Bell (2009), IceBridge Sander Air GRAV L1B geolocated free air gravity anomalies, 11.18.09, digital media, Natl. Snow and Ice Data Cent., Boulder, Colo.
4. Ferrigno, J., B. Lucchitta, K. Mullins, A. Allison, R. Allen, and W. Gould (1993), Velocity measurements and changes in position of Thwaites Glacier/iceberg tongue from aerial photography, Landsat images and NOAA AVHRR data, Ann. Glaciol., 17, 239-244. (Pubitemid 24394604)
5. Gohl, K. (2011), Basement control on past ice sheet dynamics in the Amundsen Sea Embayment, West Antarctica, Palaeogeogr. Palaeocli-matol. Palaeoecol., doi:10.1016/j.palaeo.2011.02.022, in press.
6. Haran, T., T. Bohlander, T. Scambos, and M. Fahnestock (2006), MODIS mosaic of Antarctica (MOA) image map, digital media, Natl. Snow and Ice Data Cent., Boulder, Colo.
7. Holt, J. W., D. D. Blankenship, D. L. Morse, D. A. Young, M. E. Peters, S. D. Kempf, T. G. Richter, D. G. Vaughan, and H. F. J. Corr (2006), New boundary conditions for the West Antarctic Ice Sheet: Subglacial topography of the Thwaites and Smith glacier catchments, Geophys. Res. Lett., 33, L09502, doi:10.1029/2005GL025561. (Pubitemid 43997540)
8. Hughes, T. (1981), The weak underbelly of the West Antarctic Ice Sheet, J. Glaciol., 27, 518-525.
9. Jenkins, A., P. Dutrieux, S. Jacobs, S. McPhail, J. Perrett, A. Webb, and D. White (2010), Observations beneath Pine Island Glacier in West Antarctica and implications for its retreat, Nat. Geosci., 3, 468-472.
10. Joughin, I., S. Tulaczyk, J. Bamber, D. Blankenship, J. Holt, T. Scambos, and D. Vaughan (2009), Basal conditions for Pine Island and Thwaites glaciers, West Antarctica, determined using satellite and airborne data, J. Glaciol., 55, 245-257.
11. Krabill, W. (2009), IceBridge ATM L2 Icessn Elevation, Slope and Roughness, 11.18.09, digital media, Natl. Snow and Ice Data Cent., Boulder, Colo.
12. Krabill, W., W. Abdalati, E. Frederick, S. Manizade, C. Martin, J. Sonntag, R. Swift, R. Thomas, and J. Yungel (2002), Aircraft laser altimetry measurement of elevation changes of the Greenland Ice Sheet: Technique and accuracy assessment, J. Geodyn., 34(3-4), 357-376.
13. LeMasurier, W., and J. Thompson (1990), Volcanoes of the Antarctic Plate and Southern Oceans, Antarct. Res. Ser., vol. 48, AGU, Washington, D. C.
14. Lowe, A., and J. Anderson (2002), Reconstruction of the West Antarctic Ice Sheet in Pine Island Bay during the Last Glacial Maximum and its subsequent retreat history, Quat. Sci. Rev., 21, 1879-1897.
15. Nitsche, F. O., S. S. Jacobs, R. D. Larter, and K. Gohl (2007), Bathymetry of the Amundsen Sea continental shelf: Implications for geology, oceanography, and glaciology, Geochem. Geophys. Geosyst., 8, Q10009, doi:10.1029/2007GC001694.
16. Padman, L., H. Fricker, R. Coleman, S. Howard, and L. Erofeeva (2002), A new tide model for Antarctic ice shelves and seas, Ann. Glaciol., 34, 247-254. (Pubitemid 34866117)
17. Rignot, E. (2001), Evidence for rapid retreat and mass loss of Thwaites Glacier, West Antarctica, J. Glaciol., 47, 213-222. (Pubitemid 33119235)
18. Rignot, E. (2006), Changes in ice dynamics and mass balance of the Antarctic ice sheet, Philos. Trans. R. Soc., 364, 1637-1655. (Pubitemid 44106644)
19. Rignot, E., D. Vaughan, M. Schmeltz, T. Dupont, and D. MacAyeal (2002), Acceleration of Pine Island and Thwaites Glaciers, West Antarctica, Ann. Glaciol., 34, 189-194. (Pubitemid 34866111)
20. Rignot, E., et al. (2004), Improved estimation of the mass balance of glaciers draining into the Amundsen sector of West Antarctica from the CECS/NASA 2002 campaign, Ann. Glaciol., 39, 231-237. (Pubitemid 41167028)
21. Rignot, E., J. Bamber, M. Van den Broeke, C. Davis, Y. Li, W. Van de Berg, and E. Van Meijgaard (2008), Recent Antarctic ice mass loss from radar interferometry and regional climate modelling, Nat. Geosci., 1, 106-110.
22. 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.
23. Shepherd, A., D. Wingham, and E. Rignot (2004), Warm ocean is eroding West Antarctic Ice Sheet, Geophys. Res. Lett., 31, L23402, doi:10.1029/ 2004GL021106. (Pubitemid 40482448)
24. Smith, J., C.-D. Hillenbrand, G. Kuhn, R. Larter, A. Graham, W. Ehrmann, S. Moreton, and M. Forwick (2011), Deglacial history of the West Antarctic Ice Sheet in the western Amundsen Sea Embayment, Quat. Sci. Rev., 30, 488-505.
25. Talwani, M., J. Worzel, and M. Landisman (1959), Rapid Gravity computations for two-dimensional bodies with application to the Mendocino submarine fracture zone, J. Geophys. Res., 64, 49-59.
26. Van den Broeke, M., W. Van de Berg, and E. Van Meijgaard (2008), Firn depth correction along the Antarctic grounding line, Antarct. Sci., 20, 513-517.
27. Vaughan, D. G., H. F. J. Corr, F. Ferraccioli, N. Frearson, A. O'Hare, D. Mach, J. W. Holt, D. D. Blankenship, D. L. Morse, and D. A. Young (2006), New boundary conditions for the West Antarctic ice sheet: Sub-glacial topography beneath Pine Island Glacier, Geophys. Res. Lett., 33, L09501, doi:10.1029/2005GL025588. (Pubitemid 43997539)
28. Zwally, H., M. Giovinetto, J. Li, H. Cornejo, M. Beckley, A. Brenner, J. Saba, and D. Yi (2005), Mass changes of the Greenland and Antarctic ice sheets and ice shelves and contributions to sea-level rise: 1992-2002, J. Glaciol., 51, 509-527. (Pubitemid 43329191)