Seasonal to decadal scale variations in the surface velocity of Jakobshavn Isbrae, Greenland: Observation and model-based analysis

Journal of Geophysical Research: Earth Surface

Volumn 117, Issue 2, 2012, Pages

  Joughin, Ian ^a   Smith, Ben E ^a   Howat, Ian M ^b   Floricioiu, Dana ^c   Alley, Richard B ^d   Truffer, Martin ^e   Fahnestock, Mark ^f  

^a UNIVERSITY OF WASHINGTON   (United States)

^b OHIO STATE UNIVERSITY   (United States)

^c GERMAN AEROSPACE CENTER DLR   (Germany)

^d PENNSYLVANIA STATE UNIVERSITY   (United States)

^e UNIVERSITY OF ALASKA FAIRBANKS   (United States)

^f UNIVERSITY OF NEW HAMPSHIRE   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

DECADAL VARIATION; FLOW MODELING; GLACIER DYNAMICS; ICE FLOW; ICE RETREAT; SEASONAL VARIATION; WINTER;

ARCTIC; GREENLAND; JAKOBSHAVN ISBRAE;

EID: 84861659264     PISSN: None     EISSN: 21699011     Source Type: Journal    
DOI: 10.1029/2011JF002110     Document Type: Article

References (60)

1. Amundson, J. M., and M. Truffer (2010), A unifying framework for iceberg-calving models, J. Glaciol., 56(199), 822-830, doi:10.3189/ 002214310794457173.
2. Amundson, J. M., M. Truffer, M. P. Lüthi, M. Fahnestock, M. West, and R. J. Motyka (2008), Glacier, fjord, and seismic response to recent large calving events, Jakobshavn Isbrae, Greenland, Geophys. Res. Lett., 35, L22501, doi:10.1029/2008GL035281.
3. Amundson, J. M., M. Fahnestock, M. Truffer, J. Brown, M. P. Lüthi, and R. J. Motyka (2010), Ice mélange dynamics and implications for terminus stability, Jakobshavn Isbræ, Greenland, J. Geophys. Res., 115, F01005, doi:10.1029/2009JF001405.
4. Bindschadler, R. (1983), The importance of pressurized subglacial water in separation and sliding at the glacier bed, J. Glaciol., 29(101), 3-19.
5. Block, A. E., and R. E. Bell (2011), Geophysical evidence for soft bed sliding at Jakobshavn Isbrae, West Greenland, Cryosphere Discuss., 5, 339-366, doi:10.5194/tcd-5-339-2011.
6. Clarke, T. S., and K. Echelmeyer (1996), Seismic-reflection evidence for a deep subglacial trough beneath Jakobshavns Isbrae, West Greenland, J. Glaciol., 42(141), 219-232.
7. Csatho, B., T. Schenk, C. J. Van der Veen, and W. B. Krabill (2008), Intermittent thinning of Jakobshavn Isbrae, West Greenland since the Little Ice Age, J. Glaciol., 54(184), 131-144, doi:10.3189/002214308784409035.
8. Cuffey, K. M., and W. S. B. Paterson (2010), The Physics of Glaciers, 4th ed., 704 pp., Elsevier, Burlington, Mass.
9. Das, S. B., I. Joughin, M. D. Behn, I. M. Howat, M. A. King, D. Lizarralde, and M. P. Bhatia (2008), Fracture propagation to the base of the Greenland Ice Sheet during supraglacial lake drainage, Science, 320(5877), 778-781, doi:10.1126/science.1153360. (Pubitemid 351929623)
10. Echelmeyer, K., and W. D. Harrison (1990), Jakobshavns Isbrae, West Greenland: Seasonal variations in velocity or lack thereof, J. Glaciol., 36(122), 82-88.
11. Funk, M., K. Echelmeyer, and A. Iken (1994), Mechanisms of Fast-Flow in Jakobshavns-Isbrae, West Greenland. 2. Modeling of Englacial Temperatures, J. Glaciol., 40(136), 569-585.
12. Hindmarsh, R. C. A. (2004), A numerical comparison of approximations to the Stokes equations used in ice sheet and glacier modeling, J. Geophys. Res., 109, F01012, doi:10.1029/2003JF000065.
13. Hindmarsh, R. C. A. (2009), Consistent generation of ice-streams via thermo-viscous instabilities modulated by membrane stresses, Geophys. Res. Lett., 36, L06502, doi:10.1029/2008GL036877.
14. Hofton, M. A., J. B. Blair, S. B. Luthcke, and D. L. Rabine (2008), Assessing the performance of 20-25 m footprint waveform lidar data collected in ICESat data corridors in Greenland, Geophys. Res. Lett., 35, L24501, doi:10.1029/2008GL035774.
15. Howat, I. M., I. Joughin, S. Tulaczyk, and S. Gogineni (2005), Rapid retreat and acceleration of Helheim Glacier, east Greenland, Geophys. Res. Lett., 32(22), L22502, doi:10.1029/2005GL024737. (Pubitemid 43092265)
16. Howat, I. M., I. Joughin, and T. A. Scambos (2007), Rapid changes in ice discharge from Greenland outlet glaciers, Science, 315(5818), 1559-1561, doi:10.1126/science.1138478. (Pubitemid 46449468)
17. Howat, I. M., I. Joughin, M. Fahnestock, B. E. Smith, and T. Scambos (2008), Synchronous retreat and acceleration of southeast Greenland outlet glaciers 2000-2006: Ice dynamics and coupling to climate, J. Glaciol., 54(184), 646-660, doi:10.3189/002214308784409017.
18. Howat, I. M., Y. Ahn, I. Joughin, V. D. Broeke, J. Lenaerts, and B. Smith (2011), Cumulative mass change of Greenland's three largest outlet glaciers, 2000-2010, Geophys. Res. Lett., 38, L12501, doi:10.1029/ 2011GL047565.
19. Iken, A., K. Echelmeyer, W. Harrison, and M. Funk (1993), Mechanisms of fast flow in Jakobshavns-Isbrae, West Greenland. 1. Measurements of temperature and water-level in deep boreholes, J. Glaciol., 39(131), 15-25. (Pubitemid 23383589)
20. Intergovernmental Panel on Climate Change (IPCC) (2007), Climate Change 2007: The Physical Science Basis: Working Group I Contribution to the Fourth Assessment Report of the IPCC, edited by S. Solomon et al., Cambridge Univ. Press, New York.
21. Joughin, I. (2002), Ice-sheet velocity mapping: A combined interferometric and speckle-tracking approach, Ann. Glaciol., 34, 195-201, doi:10.3189/ 172756402781817978. (Pubitemid 34866112)
22. Joughin, I., W. Abdalati, and M. Fahnestock (2004a), Large fluctuations in speed on Greenland's Jakobshavn Isbrae glacier, Nature, 432(7017), 608-610, doi:10.1038/nature03130. (Pubitemid 39626264)
23. Joughin, I., D. R. MacAyeal, and S. Tulaczyk (2004b), Basal shear stress of the Ross ice streams from control method inversions, J. Geophys. Res., 109, B09405, doi:10.1029/2003JB002960. (Pubitemid 39605423)
24. Joughin, I., S. B. Das, M. A. King, B. E. Smith, I. M. Howat, and T. Moon (2008a), Seasonal speedup along the western flank of the Greenland Ice Sheet, Science, 320(5877), 781-783, doi:10.1126/science.1153288. (Pubitemid 351929624)
25. Joughin, I., I. M. Howat, M. Fahnestock, B. Smith, W. Krabill, R. B. Alley, H. Stern, and M. Truffer (2008b), Continued evolution of Jakobshavn Isbrae following its rapid speedup, J. Geophys. Res., 113, F04006, doi:10.1029/2008JF001023.
26. Joughin, I., S. Tulaczyk, J. L. Bamber, D. Blankenship, J. W. Holt, T. Scambos, and D. G. Vaughan (2009), Basal conditions for Pine Island and Thwaites Glaciers, West Antarctica, determined using satellite and airborne data, J. Glaciol., 55(190), 245-257, doi:10.3189/002214309788608705.
27. Joughin, I., B. E. Smith, I. M. Howat, T. Scambos, and T. Moon (2010), Greenland flow variability from ice-sheet-wide velocity mapping, J. Glaciol., 56(197), pp. 415-430, doi:10.3189/002214310792447734.
28. Kamb, B., and K. A. Echelmeyer (1986), Stress-gradient coupling in glacier flow. 1. Longitudinal averaging of the influence of ice thickness and surface slope, J. Glaciol., 32(111), 267-284.
29. Krabill, W., et al. (2004), Greenland Ice Sheet: Increased coastal thinning, Geophys. Res. Lett., 31, L24402, doi:10.1029/2004GL021533. (Pubitemid 40301211)
30. Li, J. (2010), Mapping of ice sheet deep layers and fast outlet glaciers with multi-channel-high-sensitivity radar, PhD thesis, 201 pp., Univ. of Kans., Lawrence.
31. Luckman, A., and T. Murray (2005), Seasonal variation in velocity before retreat of Jakobshavn Isbrae, Greenland, Geophys. Res. Lett., 32(8), L08501, doi:10.1029/2005GL022519. (Pubitemid 41043261)
32. Luckman, A., T. Murray, R. de Lange, and E. Hanna (2006), Rapid and synchronous ice-dynamic changes in East Greenland, Geophys. Res. Lett., 33(3), L03503, doi:10.1029/2005GL025428.
33. Lüthi, M., M. Funk, A. Iken, S. Gogineni, and M. Truffer (2002), Mechanisms of fast flow in Jakobshavn Isbrae, West Greenland: Part III. Measurements of ice deformation, temperature and cross-borehole conductivity in boreholes to the bedrock, J. Glaciol., 48(162), 369-385, doi:10.3189/ 172756502781831322. (Pubitemid 36346044)
34. Lüthi, M. P., M. Funk, and A. Iken (2003), Indication of active overthrust faulting along the Holocene-Wisconsin transition in the marginal zone of Jakobshavn Isbrae, J. Geophys. Res., 108(B11), 2543, doi:10.1029/ 2003JB002505.
35. MacAyeal, D. R. (1989), Large-scale ice flow over a viscous basal sediment: Theory and application to Ice Stream-B, Antarctica, J. Geophys. Res., 94(B4), 4071-4087, doi:10.1029/JB094iB04p04071.
36. MacAyeal, D. R. (1992), The basal stress-distribution of Ice Stream-E, Antarctica, inferred by control methods, J. Geophys. Res., 97(B1), 595-603, doi:10.1029/91JB02454.
37. MacAyeal, D. R. (1993), A tutorial on the use of control methods in icesheet modeling, J. Glaciol., 39(131), 91-98.
38. Meier, M. F., and A. Post (1987), Fast tidewater glaciers, J. Geophys. Res., 92(B9), 9051-9058, doi:10.1029/JB092iB09p09051.
39. Moon, T., I. Joughin, B. E. Smith, and I. M. Howat (2012), 21st century evolution of Greenland outlet glacier velocities, Science, 336(6081), 576-578, doi:10.1126/science.1219985.
40. Morlighem, M., E. Rignot, H. Seroussi, E. Larour, H. Ben Dhia, and D. Aubry (2010), Spatial patterns of basal drag inferred using control methods from a full-Stokes and simpler models for Pine Island Glacier, West Antarctica, Geophys. Res. Lett., 37, L14502, doi:10.1029/ 2010GL043853.
41. Nettles, M., et al. (2008), Step-wise changes in glacier flow speed coincide with calving and glacial earthquakes at Helheim Glacier, Greenland, Geophys. Res. Lett., 35, L24503, doi:10.1029/2008GL036127.
42. Nick, F. M., A. Vieli, I. M. Howat, and I. Joughin (2009), Large-scale changes in Greenland outlet glacier dynamics triggered at the terminus, Nat. Geosci., 2(2), 110-114, doi:10.1038/ngeo394.
43. Payne, A. J., A. Vieli, A. P. Shepherd, D. J. Wingham, and E. Rignot (2004), Recent dramatic thinning of largest West Antarctic ice stream triggered by oceans, Geophys. Res. Lett., 31(23), L23401, doi:10.1029/ 2004GL021284.
44. Pfeffer, W. T. (2007), A simple mechanism for irreversible tidewater glacier retreat, J. Geophys. Res., 112, F03S25, doi:10.1029/2006JF000590. (Pubitemid 350123365)
45. Pfeffer, W. T., J. T. Harper, and S. O'Neel (2008), Kinematic constraints on glacier contributions to 21st-century sea-level rise, Science, 321(5894), 1340-1343, doi:10.1126/science.1159099.
46. Rignot, E., and P. Kanagaratnam (2006), Changes in the velocity structure of the Greenland ice sheet, Science, 311(5763), 986-990, doi:10.1126/ science.1121381. (Pubitemid 43271722)
47. Schoof, C. (2007), Ice sheet grounding line dynamics: Steady states, stability, and hysteresis, J. Geophys. Res., 112, F03S28, doi:10.1029/ 2006JF000664.
48. Schoof, C. (2010), Ice-sheet acceleration driven by melt supply variability, Nature, 468(7325), 803-806, doi:10.1038/nature09618.
49. Thomas, R. H. (2004), Force-perturbation analysis of recent thinning and acceleration of Jakobshavn Isbrae, Greenland, J. Glaciol., 50(168), 57-66, doi:10.3189/172756504781830321. (Pubitemid 40067989)
50. 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 Isbrae, Greenland, J. Glaciol., 49(165), 231-239, doi:10.3189/172756503781830764. (Pubitemid 37519403)
51. Truffer, M., and K. A. Echelmeyer (2003), Of Isbrae and ice streams, Ann. Glaciol., 36, 66-72, doi:10.3189/172756403781816347.
52. van der Veen, C. J. (1996), Tidewater calving, J. Glaciol., 42(141), 375-385. (Pubitemid 126567337)
53. van der Veen, C. J. (1998), Fracture mechanics approach to penetration of bottom crevasses on glaciers, Cold Reg. Sci. Technol., 27(3), 213-223, doi:10.1016/S0165-232X(98)00006-8. (Pubitemid 28508024)
54. van der Veen, C. J. (1999), Fundamentals of Glacier Dynamics, 462 pp., A.A. Balkema, Rotterdam, Netherlands.
55. van der Veen, C. J., J. C. Plummer, and L. A. Stearns (2011), Controls on the recent speed up of Jakobshavn Isbræ, west Greenland, J. Glaciol., 57(204), 770-782, doi:10.3189/002214311797409776.
56. van de Wal, R. S. W., W. Greuell, M. van den Broeke, C. H. Reijmer, and J. Oerlemans (2005), Surface mass-balance observations and automatic weather station data along a transect near Kangerlussuaq, West Greenland, Ann. Glaciol., 42, 311-316, doi:10.3189/172756405781812529. (Pubitemid 44322220)
57. Vieli, A., and F. M. Nick (2011), Understanding and modelling rapid dynamic changes of tidewater outlet glaciers: Issues and implications, Surv. Geophys., 32(4-5), 437-458, doi:10.1007/s10712-011-9132-4.
58. Vieli, A., J. Jania, and L. Kolondra (2002), The retreat of a tidewater glacier: Observations and model calculations on Hansbreen, Spitsbergen, J. Glaciol., 48(163), 592-600, doi:10.3189/172756502781831089. (Pubitemid 36845127)
59. Weidick, A. (1995), Satellite image atlas of glaciers of the world, Greenland, U.S. Geol. Surv. Prof. Pap., 1386, 141 pp.
60. Zwally, H. J., W. Abdalati, T. Herring, K. Larson, J. Saba, and K. Steffen (2002), Surface melt-induced acceleration of Greenland ice-sheet flow, Science, 297(5579), 218-222, doi:10.1126/science.1072708. (Pubitemid 34761277)