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Ice velocity changes on Penny Ice Cap, Baffin Island, since the 1950s


Predicting the velocity response of glaciers to increased surface melt is a major topic of ongoing research with significant implications for accurate sea-level rise forecasting. In this study we use optical and radar satellite imagery as well as comparisons with historical ground measurements to produce a multi-decadal record of ice velocity variations on Penny Ice Cap, Baffin Island. Over the period 1985–2011, the six largest outlet glaciers on the ice cap decelerated by an average rate of 21 m a−1 over the 26 year period (0.81 m a−2), or 12% per decade. The change was not monotonic, however, as most glaciers accelerated until the 1990s, then decelerated. A comparison of recent imagery with historical velocity measurements on Highway Glacier, on the southern part of Penny Ice Cap, shows that this glacier decelerated by 71% between 1953 and 2009–11, from 57 to 17 m a−1. The recent slowdown of outlet glaciers has coincided with increases in mass loss, terminus retreat and an inferred reduction in basal sliding. Measured decelerations are greater than the total short-term variability measured from both seasonal and interannual fluctuations, and support the hypothesis that glacier thinning and/or increased meltwater production promotes a long-term reduction in ice motion.

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This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (, which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Correspondence: Nicole Schaffer <>
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Alley, RB, Clark, PU, Huybrechts, P and Joughin, I (2005) Ice-sheet and sea-level changes. Science, 310, 456460 (doi: 10.1126/science.1114613)
Anderson, B and 6 others (2014) Annual to daily ice velocity and water pressure variations on Ka Roimata o Hine Hukatere (Franz Josef Glacier), New Zealand. Arct. Antarct. Alpine Res., 46(4), 919932 (doi: 10.1657/1938-4246-46.4.919)
Baird, PD (1953) Baffin Island expedition, 1953: a preliminary field report. Arctic, 6, 227251 (doi: 10.14430/arctic3878)
Banwell, A, Hewitt, I, Willis, I and Arnold, N (2016) Moulin density controls drainage development beneath the Greenland Ice Sheet. J. Geophys. Res. Earth Surf., 121, 22482269 (doi: 10.1002/2015JF003801)
Bartholomew, I and 5 others (2012) Short-term variability in Greenland Ice Sheet motion forced by time-varying meltwater drainage: implications for the relationship between subglacial drainage system behavior and ice velocity. J. Geophys. Res.: Earth Surf., 117(F3), 117 (doi: 10.1029/2011JF002220)
Bradley, RS (1973) Seasonal climatic fluctuations on Baffin Island during the period of instrumental records. Arctic, 26(3), 230243
Burgess, DO, Sharp, MJ, Mair, DWF, Dowdeswell, JA and Benham, TJ (2005) Flow dynamics and iceberg calving rates of Devon Ice Cap, Nunavut, Canada. J. Glaciol., 51(173), 219230 (doi: 10.3189/172756505781829430)
Burgess, EW, Larsen, CF and Forster, RR (2013) Summer melt regulates winter glacier flow speeds throughout Alaska. Geophys. Res. Lett., 40(23), 61606164 (doi: 10.1002/2013GL058228)
Copland, L, Sharp, M and Dowdeswell, A (2003a) The distribution and flow characteristics of surge-type glaciers in the Canadian high Arctic. Ann. Glaciol., 36(1), 7381 (doi: 10.3189/172756403781816301)
Copland, L, Sharp, MJ, Nienow, P and Bingham, RG (2003b) The distribution of basal motion beneath a high Arctic polythermal glacier. J. Glaciol., 49(166) (doi: 10.3189/172756503781830511)
Copland, L and 8 others (2009) Glacier velocities across the Karakoram. Ann. Glaciol., 50(52), 4149 (doi: 10.3189/172756409789624229)
Fatland, DR, Lingle, CS and Truffer, M (2003) A surface motion survey of Black Rapids Glacier, Alaska, U.S.A. Ann. Glaciol., 36(1), 2936 (doi: 10.3189/172756403781816095)
Fitch, AJ, Kadyrov, A, Christmas, WJ and Kittler, J (2002) Orientation correlation. In Proceedings of the British Machine Vision Conference 2002, 2–5 September 2002, Cardiff, UK, 133142 (doi: 10.5244/C.16.11)
Fitzpatrick, AW and 8 others (2013) Ice flow dynamics and surface meltwater flux at a land-terminating sector of the Greenland ice sheet. J. Glaciol., 59(216), 687696 (doi: 10.3189/2013JoG12J143)
Gardner, A, Moholdt, G, Arendt, A and Wouters, B (2012) Accelerated contributions of Canada's Baffin and Bylot Island glaciers to sea level rise over the past half century. Cryosphere, 6, 11031125 (doi: 10.5194/tc-6-1103-2012)
Gardner, AS and 8 others (2011) Sharply increased mass loss from glaciers and ice caps in the Canadian Arctic Archipelago. Nature, 473(7347), 357360 (doi: 10.1038/nature10089)
Glen, JW (1955) The creep of polycrystalline ice. Proc. R. Soc. Lond., 228(1175), 519538 (doi: 10.1098/rspa.1955.0066)
Gray, AL, Short, N, Mattar, KE and Jezek, KC (2001) Velocities and flux of the Filchner Ice shelf and its tributaries determined from speckle tracking interferometry. Can. J. Remote Sens., 27(3), 193206 (doi: 10.1080/07038992.2001.10854936)
Harig, C and Simons, FJ (2016) Ice mass loss in Greenland, the Gulf of Alaska, and the Canadian Archipelago: seasonal cycles and decadal trends. Geophys. Res. Lett., 43(7), 31503159 (doi: 10.1002/2016GL067759)
Heid, T and Kääb, A (2012a) Evaluation of existing image matching methods for deriving glacier surface displacements globally from optical satellite imagery. Remote Sens. Environ., 118, 339355 (doi: 10.1016/j.rse.2011.11.024)
Heid, T and Kääb, A (2012b) Repeat optical satellite images reveal widespread and long term decrease in land-terminating glacier speeds. Cryosphere, 6, 467478 (doi: 10.5194/tc-6-467-2012)
Howat, IM, Joughin, I, Fahnestock, M, Smith, BE., and Scambos, TA. (2008) Synchronous retreat and acceleration of southeast Greenland outlet glaciers 2000-06: Ice dynamics and coupling to climate. J. Glaciol., 54(187), 646660 (doi: 10.3189/002214308786570908)
Iken, A (1981) The effect of the subglacial water pressure on the sliding velocity of a glacier in an idealized numerical model. J. Glaciol., 27(97), 407421 (doi: 10.3198/1981JoG27-97-407-421)
Luckman, A, Murray, T, de Lange, R, and Hanna, E (2006) Rapid and synchronous ice-dynamic changes in East Greenland. Geophys. Res. Lett., 33(3), 14 (doi: 10.1029/2005GL025428)
Joughin, I (2002) Ice-sheet velocity mapping: a combined interferometric and speckle-tracking approach. Ann. Glaciol., 34(1), 195201 (doi: 10.3189/172756402781817978)
Kääb, A and Vollmer, M (2000) Surface geometry, thickness changes and flow fields on creeping mountain permafrost: automatic extraction by digital image analysis. Permafrost Periglac. Process., 11, 315326 (doi: 10.1002/1099-1530(200012))
Kamb, B and 7 others (1985) Glacier surge mechanism: 1982–1983 surge of variegated glacier, Alaska. Science, 227(4686), 469479 (doi: 10.1126/science.227.4686.469)
Kick, W (1962) Variations of some central Asiatic glaciers. IASH Publ. (Symp. Obergurgl 1962 – Variations Regime Exist. Glaciers), 58, 223229
Lee, DS, Storey, JC, Choate, MJ and Hayes, RW (2004) Four years of Landsat-7 on-orbit geometric calibration and performance. IEEE Trans. Geosci. Remote Sens., 42(12), 27862795 (doi: 10.1109/TGRS.2004.836769)
Lenaerts, JT and 5 others (2013) Irreversible mass loss of Canadian Arctic Archipelago glaciers. Geophys. Res. Lett., 40(5), 870874 (doi: 10.1002/grl.50214)
Mair, D and 5 others (2003) Hydrological controls on patterns of surface, internal and basal motion during three spring events’’: Haut Glacier d'Arolla, Switzerland. J. Glaciol., 49(167), 555567 (doi: 10.3189/172756503781830467)
Noël, B and 5 others (2015) Evaluation of the updated regional climate model RACMO2.3: Summer snowfall impact on the Greenland Ice Sheet. Cryosphere, 9(5), 18311844 (doi: 10.5194/tc-9-1831-2015)
Oerlemans, J (2005) Extracting a climate signal from 169 glacier records. Science, 308(5722), 675677 (doi: 10.1126/science.1107046)
Parizek, BR and Alley, RB (2004) Implications of increased Greenland surface melt under global-warming scenarios: ice-sheet simulations. Quat. Sci. Rev., 23(9–10), 10131027 (doi: 10.1016/j.quascirev.2003.12.024)
Pfeffer, W and 76 others (2014) The Randolph Glacier Inventory: a globally complete inventory of glaciers. J. Glaciol., 60(221), 537552 (doi: 10.3189/2014JoG13J176)
Schaffer, N (2017) Dynamics and mass balance of Penny Ice Cap, Baffin Island, Nunavut, in a changing climate . (PhD thesis, University of Ottawa, Ottawa, Canada)
Schoof, C (2010) Ice-sheet acceleration driven by melt supply variability. Nature, 468, 803806 (doi: 10.1038/nature09618)
Shi, L and 8 others (2010) Multichannel coherent radar depth sounder for NASA operation ice bridge. In International Geoscience and Remote Sensing Symposium (IGARSS), 17291732 (doi: 10.1109/IGARSS.2010.5649518)
Short, NH and Gray, AL (2004) Potential for RADARSAT-2 interferometry: glacier monitoring using speckle tracking. Can. J. Remote Sens., 30(3), 504509 (doi: 10.5589/m03-071)
Short, NH and Gray, AL (2005) Glacier dynamics in the Canadian High Arctic from RADARSAT-1 speckle tracking. Can. J. Remote Sens., 31(3), 225239
Sole, A and 6 others (2013) Winter motion mediates dynamic response of the Greenland Ice Sheet to warmer summers. Geophys. Res. Lett., 40(15), 39403944 (doi: 10.1002/grl.50764)
Storey, JC and Choate, MJ (2004) Landsat-5 bumper-Mode geometric correction. IEEE Trans. Geosci. Remote Sens., 42(12), 26952703 (doi: 10.1109/TGRS.2004.836390)
Sundal, AV and 5 others (2011) Melt-induced speed-up of Greenland ice sheet offset by efficient subglacial drainage. Nature, 469, 521524 (doi: 10.1038/nature09740)
Tedstone, AJ and 6 others (2013) Greenland ice sheet motion insensitive to exceptional meltwater forcing. Proc. Natl. Acad. Sci. U.S.A., 110(49), 1971919724 (doi: 10.1073/pnas.1315843110)
Tedstone, AJ and 5 others (2015) Decadal slowdown of a land-terminating sector of the Greenland Ice Sheet despite warming. Nature, 526, 692695 (doi: 10.1038/nature15722)
Thomson, L and Copland, L (2017) Multi-decadal reduction in glacier velocities and mechanisms driving deceleration at polythermal White Glacier, Arctic Canada. J. Glaciol., 63(239), 450463 (doi: 10.1017/jog.2017.3)
van de Wal, RSW and 6 others (2008) Large and rapid melt-induced velocity changes in the ablation zone of the Greenland Ice Sheet. Science, 321(5885), 111113 (doi: 10.1126/science.1158540)
Van Wychen, W and 5 others (2012) Spatial and temporal variation of ice motion and ice flux from Devon Ice Cap, Nunavut, Canada. J. Glaciol., 58(210), 657664 (doi: 10.3189/2012JoG11J164)
Van Wychen, W and 6 others (2014) Glacier velocities and dynamic ice discharge from the Queen Elizabeth Islands, Nunavut, Canada. Geophys. Res. Lett., 41(2), 484490 (doi: 10.1002//2013GL058558)
Van Wychen, W, Copland, L, Burgess, D, Gray, L and Schaffer, N (2015) Glacier velocities and dynamic discharge from the Ice masses of Baffin Island and Bylot Island, Nunavut, Canada. Can. J. Earth Sci., 52(11), 980989 (doi: 10.1139/cjes-2015-0087)
Van Wychen, W and 6 others (2016) Characterizing interannual variability of glacier dynamics and dynamic discharge (1999−2015) for the ice masses of Ellesmere and Axel Heiberg Islands, Nunavut, Canada. J. Geophys. Res.: Earth Surf., 121(1), 125 (doi: 10.1002/2015JF003708)
Vincent, C, Soruco, A, Six, D and Meur, ELE (2009) Glacier thickening and decay analysis from 50 years of glaciological observations performed on Glacier d'Argentière, Mont Blanc area, France. Ann. Glaciol., 50(50), 7379 (doi: 10.3189/172756409787769500)
Vincent, LA and 7 others (2015) Observed trends in Canada's climate and influence of Low-Frequency variability modes. J. Clim., 28, 45454560 (doi: 10.1175/JCLI-D-14-00697.1)
Waechter, A, Copland, L and Herdes, E (2015) Modern glacier velocities across the icefield ranges, St elias mountains, and variability at selected glaciers from 1959 to 2012. J. Glaciol., 61(228), 624634 (doi: 10.3189/2015JoG14J147)
Ward, WH (1955) Studies in glacier physics on the Penny Ice Cap, Baffin Island, 1953 part IV: the flow of highway glacier. J. Glaciol., 2(18), 592600
Weber, JR and Cooper, RV (1993) Monitoring of elevation changes of the Penny Ice Cap, Baffin Island. Geological Survey of Canada, Geophysics Division, Ottawa
Williamson, S, Sharp, M, Dowdeswell, J and Benham, T (2008) Iceberg calving rates from northern Ellesmere Island ice caps, Canadian Arctic, 1999–2003. J. Glaciol., 54(186), 391400 (doi: 10.3189/002214308785837048)
Wilson, R, Mernild, SH, Malmros, JK, Bravo, C and Carrion, D (2016) Surface velocity fluctuations for Glaciar Universidad, central Chile, between 1967 and 2015. J. Glaciol., 62(235), 847860 (doi: 10.1017/jog.2016.73)
Zdanowicz, C and 6 others (2012) Summer melt rates on Penny Ice Cap, Baffin Island: past and recent trends and implications for regional climate. J. Geophys. Res., 117(F02006), 121 (doi: 10.1029/2011JF002248)
Zwally, HJ and 5 others (2002) Surface melt-induced acceleration of Greenland ice-sheet flow. Science, 297(5579), 218222 (doi: 10.1126/science.1072708)
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